Template:Transclude list item excerpts as random slideshow/testcases Source: en.wikipedia.org/wiki/Template:Transclude_list_item_excerpts_as_random_slideshow/testcases
The album marks a return to the introspective gothic rock style the band had established in the early 1980s. As he neared the age of 30, vocalist and guitarist Robert Smith had felt an increased pressure to follow up on the band's pop successes with a more enduring work. This, coupled with a distaste for the group's newfound popularity, caused Smith to lapse back into the use of hallucinogenic drugs, the effects of which had a strong influence on the production of the album. Following the completion of the mixing, founding member Lol Tolhurst was fired from the band.
Disintegration became the band's highest charting album up to that point, reaching number three on the UK Albums Chart and number 12 on the US Billboard 200, and produced several hit singles, including "Lovesong", which peaked at number two on the Billboard Hot 100. It remains the band's highest-selling record to date, with more than four million copies sold worldwide. It was greeted with a warm critical reception before later being widely acclaimed, including being placed at number 116 on Rolling Stone magazine's list of the "500 Greatest Albums of All Time" in 2020. Stephen Thomas Erlewine of AllMusic called it the "culmination of all the musical directions the Cure were pursuing over the course of the '80s". (Full article...)
A group of paintings created by Mark Rothko now known as a series including works on canvas and paper produced before the artists' death by suicide.
The series has works which used both a combination of black and grey, or are monotone black, or with only a small quantity of color. The artists' works include an expression of color as more wholly dark, absent in previous works, from sometime during the 1950s.
Altogether during 1970 the artist Rothko output three works of these ACCESSION 85.27 is possessed by MoCA LA: Untitled the final in the grey-black serial painting. Although black with or without grey was the theme of Rothko's end works his penultimate painting Untitled included blue. The termination of Rothko's art and life in 1970 was death, his final product, red only. (Full article...)
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Toxic is the fifth studio album by Japaneserock band the Gazette. It was released on October 5, 2011 in Japan and includes four singles: "Shiver", "Red", "Pledge", and "Vortex". The album scored number 3 on the Oricon Daily Charts and number 6 on the Oricon Weekly Charts, selling 25,412 copies in its first week. (Full article...)
Untitled is a 1952 painting by the Russian-AmericanAbstract expressionist artist Mark Rothko. It was painted in 1952. In common with Rothko's other works from this period, it consists of large expanses of colour with dark shades.
In 2014, Untitled was bought for $66 million by an anonymous buyer. (Full article...)
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Untitled (or box set) is a box set compilation of songs released by British musician, songwriter, and producer Steven Wilson under the pseudonym Bass Communion. It contains many rarities from the last 15 years of Steven's ambient and drone work, especially from vinyl-only editions of Bass Communion albums. It also features the previously unreleased track "Temporal", recorded in 2012 as a homage to composer Harrison Birtwistle and his 1971 composition "Chronometer" – both pieces are created entirely from the sounds of clocks and other timekeeping devices.
Only 2000 copies were made, with each disc housed in a mini LP cover with inner sleeve, and a 64-page booklet. The set is a mail order exclusive to Headphone Dust and ToneFloat. (Full article...)
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Untitled (free/still) 1992/1995/2007/2011 is a series of artworks by Thai artist Rirkrit Tiravanija. Trained in Canada, the New York-based artist's installations often take the form of stages or rooms for sharing meals, cooking, reading or playing music; architecture or structures for living and socialising are a core element in his work.
In this conceptual piece, Tiravanija invites the visitor to interact, in a sociable manner, with this contemporary art. The artist aims to bridge the distance between the viewer and the artist. The viewer is part of the art, and is constantly creating the art as they eat curry and talk with friends or new acquaintances. (Full article...)
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Untitled is the ninth studio album by American R&B recording artist R. Kelly. It was released in the UK on November 30, 2009, and in the US by Jive Records on December 1, 2009. It was entirely produced by R. Kelly and a team of younger producers. (Full article...)
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Untitled (referred to in Spotify as Split LP) is a split EP by British rock bands Thought Forms and Esben and the Witch, which was released on 7 April 2014 through Invada Records. It was also released as a digital download and on 12" silver vinyl, limited to 500 copies. The EP contains four songs by Thought Forms and two songs by Esben and the Witch, and the songs "Sound of Violence" by Thought Forms and "No Dog" by Esben and the Witch were uploaded to SoundCloud. (Full article...)
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Untitled (Rise) is the fourth studio album from British R&B musical group Sault. The album has been met with positive critical reception. (Full article...)
"Untitled" (Portrait of Ross in L.A.) is a work of art by Félix González-Torres (or Felix Gonzalez-Torres), currently in the collection of the Art Institute of Chicago in Chicago, United States. The work is one of the twenty "candy works" in Gonzalez-Torres's oeuvre. The candy works are manifestable; the artworks are not physically permanent, they can exist in more than one place at a time and can vary from one installation to the next in response to the decisions made by the exhibitor, the interactions of audiences, and changing circumstances. This candy work has an ideal weight of 175 pounds (79 kg), representing González-Torrés' partner Ross Laycock. (Full article...)
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Untitled #96 is a color photograph made by American visual artist Cindy Sherman in 1981. It is known as part of her Centerfold series of 12 pictures. On 11 May 2011, a print was auctioned for US$3.89 million, the highest price paid for a photographic print at that time, though the price has since been surpassed. Another print was sold by $2,882,500 at Christie's New York, at 8 May 2012. (Full article...)
Unashamed was a Christian hardcore punk band that became one of the founding bands in the Spirit-Filled HardCore movement. Their bold faith-based lyrics center around ideas directly lifted from the Bible and conservative morality. They released two albums on Tooth & Nail Records. After signing with Tooth & Nail, the band toured until their "final" show at Cornerstone Festival in 1998. In 2009, the band announced that they were reforming with many of their original line-up, and would begin touring hard into 2010. (Full article...)
Untitled was a serial publication published by the Friends of Photography from 1972 to 1994. A total of 58 numbered publications were issued, first as a small magazine format and later as a series of booklets and full-size books. Numbers 1–10 displayed the series name and issue number on the cover, but as the publications became more specialized each number was titled independently in addition to the series name. The smallest publication in the series was Number 1, with 10 pages, and the largest was Number 43, with 156 pages.
04 is the fourth album by English indie rock band Six by Seven. It was released in 2004, and the first on their own Saturday Night Sunday Morning Records label after being released from Beggars Banquet Records. It was also their first after bass player Paul Douglas left the band and found them trying to capture their sound – which had been recorded live in the studio on The Way I Feel Today – as a three-piece. (Full article...)
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Bite It is the debut album by ScottishrockbandWhiteout, released in 1995 (see 1995 in music). The album includes two of the overall four previously released singles by the band, namely "No Time" and "Jackie's Racing". Another single, "Detroit", was not part of the original album but added as a bonus track to certain subsequent releases of Bite It, making "Starrclub" the only Whiteout single not released on a proper album (although it was re-released on the JapaneseEPNo Time). The album was available on both CD and vinyl. (Full article...)
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Untitled #93 is a color photograph created by Cindy Sherman in 1981. It is part of her Centerfolds series of 12 photographs made for the Artforum magazine. They were never published there but went to be exhibited publicly the same year, to critical acclaim. (Full article...)
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Untitled is the title of the debut album from UK R&B / soul singer Terri Walker. The album was released in 2003 by Def Soul/Mercury Records and spawned 3 singles, "Guess You Didn't Love Me" (Featuring Mos Def), "Ching Ching (Lovin' You Still)" (her first and only UK top 40 hit to date) and "Drawing Board" (promo only).
The album was nominated for a MOBO award and it was also nominated for the Mercury Music Prize for album of the year. (Full article...)
In the Aeroplane Over the Sea was recorded at Pet Sounds Studio from July to September1997. Producer Robert Schneider worked with bandleader Jeff Mangum to improve upon the low-quality sound of Neutral Milk Hotel's debut album, On Avery Island. Instead of using standard studio equipment like guitar pedals or effects units to induce distortion, Schneider developed a recording technique that involved heavy compression. To promote the album, Neutral Milk Hotel undertook a tour of North America and Europe, and developed a reputation for chaotic and physically demanding performances.
Contemporary reviews were moderately positive; over time, however, the album developed a cult following. The band became more well known and started touring more, which negatively affected Mangum, whose mental health began to deteriorate. He eventually withdrew from touring, and Neutral Milk Hotel went on hiatus shortly after. In the years since its release, In the Aeroplane Over the Sea has been described by music journalists as both a landmark album for indie rock and as one of the best albums of the 1990s and its critical standing has risen considerably. (Full article...)
The name Alan Laddie was the nom de plume for the show's writing staff.
Two unaired pilots were created, the first released as a special feature on the Volume Two DVD set. The series premiered on April 15, 1994, and ended on May 31, 2008, with a total of 109 episodes over the course of 11 seasons. (Full article...)
Untitled (Rape Scene) is a color photograph documentation created from a 35mm slide by Cuban American artist Ana Mendieta. She made it during an April 1973 performance while still a student at the University of Iowa. It is one of three photographs she created in reaction to the rape and murder of a woman on campus. The Tate Gallery in London, which owns the work, describes it this way:
Mendieta invited her fellow students to her apartment where, through a door left purposefully ajar, they found her in the position recorded in this photograph, which recreated the scene as reported in the press. Some time later, Mendieta recalled that her audience "all sat down, and started talking about it. I didn’t move. I stayed in position about an hour. It really jolted them." In 1980, she commented that the rape had "moved and frightened" her, elaborating: "I think all my work has been like that – a personal response to a situation ... I can’t see being theoretical about an issue like that." On another occasion she explained that she had created this work "as a reaction against the idea of violence against women."
Art writer Megan Heuer describes the work as capturing the artist's interest in violence. Influenced by the work of the Viennese Actionists, Untitled (Rape Scene) also expresses Mendieta's desire to evoke a visceral reaction from her audience. (Full article...)
"Untitled" (Portrait of Ross in L.A.) is a work of art by Félix González-Torres (or Felix Gonzalez-Torres), currently in the collection of the Art Institute of Chicago in Chicago, United States. The work is one of the twenty "candy works" in Gonzalez-Torres's oeuvre. The candy works are manifestable; the artworks are not physically permanent, they can exist in more than one place at a time and can vary from one installation to the next in response to the decisions made by the exhibitor, the interactions of audiences, and changing circumstances. This candy work has an ideal weight of 175 pounds (79 kg), representing González-Torrés' partner Ross Laycock. (Full article...)
The album was supported by four singles; "And I Told Them I Invented Times New Roman", "Lemon Meringue Tie", "The Backwards Pumpkin Song", and "Open Your Eyes and Look North". It is the band's first of two studio albums to feature clean vocalist Jonny Craig. Craig left in late 2007, later re-joining in mid-2010. It is also the band's only full-length to feature guitarist Sean O'Sullivan, who left the band in late 2007. A non-direct sequel to the album, titled Downtown Battle Mountain II, was released on March 8, 2011. (Full article...)
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The untitled fourth studio album by the English rock band Led Zeppelin, commonly known as Led Zeppelin IV, was released on 8 November 1971, by Atlantic Records. It was produced by the band's guitarist, Jimmy Page, and recorded between December 1970 and February 1971, mostly in the country house Headley Grange. The album contains one of the band's most well-known recordings, the eight-minute-long "Stairway to Heaven".
The informal recording environment inspired the band, allowing them to try different arrangements of material and create songs in various styles. After the previous album Led Zeppelin III (1970) received lukewarm reviews from critics, they decided their fourth album would officially be untitled and represented instead by four symbols – one chosen by each band member – without featuring the name or any other details on the cover. Unlike the prior two albums, the band was joined by guest musicians: singer Sandy Denny on "The Battle of Evermore", and pianist Ian Stewart on "Rock and Roll". As with prior albums, most of the material was written by the band, though there was one cover song, a hard rock re-interpretation of the Memphis Minnieblues song "When the Levee Breaks".
Led Zeppelin IV was an immediate critical and commercial success and is Led Zeppelin's best-selling album, having sold over 37 million copies worldwide. It is one of the best-selling albums in the United States and of all time, while critics have regularly placed it high on lists of the greatest albums of all time. (Full article...)
Untitled is a 1952 painting by the Russian-AmericanAbstract expressionist artist Mark Rothko. It was painted in 1952. In common with Rothko's other works from this period, it consists of large expanses of colour with dark shades.
In 2014, Untitled was bought for $66 million by an anonymous buyer. (Full article...)
Green is the sixth studio album by American rock band R.E.M., released in the United States on November 8, 1988, by Warner Bros. Records and the following day in the UK and Europe. The second album to be produced by the band and Scott Litt, it continued to explore political issues both in its lyrics and packaging. The band experimented on the album, writing major-key rock songs and incorporating new instruments into their sound including the mandolin, as well as switching their original instruments on other songs.
Two singles from the album were released – "Sowing Season" on November 21, 2006, and "Jesus Christ" on April 30, 2007. The album peaked at No. 31 on the Billboard 200, becoming the band's highest-charting record at the time of its release. In 2022, the album was certified Gold by the RIAA, denoting sales of over 500,000 copies in the United States alone.
The album saw Brand New fully leave behind their pop punk origins in favor of an indie rock direction. Lyrically, it was praised for the band's continued progression and maturity as songwriters by delving into darker subject matters such as existentialism, death, depression and religion.
The Devil and God Are Raging Inside Me received positive reviews from critics. Publications including Pitchfork, Spin and Alternative Press compared the album to the work of Radiohead, and several pronounced it as one of the best albums of the decade. Its legacy grew in the years since its release, and it is now credited as one of the most important emo albums of all time by critics and fellow musicians. The band performed the album in full on a 2016 tour to commemorate the album's tenth anniversary. (Full article...)
A temperate forest is a forest found between the tropical and boreal regions, located in the temperate zone. It is the second largest terrestrial biome, covering 25% of the world's forest area, only behind the boreal forest, which covers about 33%. These forests cover both hemispheres at latitudes ranging from 25 to 50 degrees, wrapping the planet in a belt similar to that of the boreal forest. Due to its large size spanning several continents, there are several main types: deciduous, coniferous, mixed forest, and rainforest. (Full article...)
A log flume or lumber flume is a watertight flume constructed to transport lumber and logs down mountainous terrain using flowing water. Flumes replaced horse- or oxen-drawn carriages on dangerous mountain trails in the late 19th century. Logging operations preferred flumes whenever a reliable source of water was available. Flumes were cheaper to build and operate than logging railroads. They could span long distances across chasms with more lightweight trestles.
Computer simulations are realized by running computer programs that can be either small, running almost instantly on small devices, or large-scale programs that run for hours or days on network-based groups of computers. The scale of events being simulated by computer simulations has far exceeded anything possible (or perhaps even imaginable) using traditional paper-and-pencil mathematical modeling. In 1997, a desert-battle simulation of one force invading another involved the modeling of 66,239 tanks, trucks and other vehicles on simulated terrain around Kuwait, using multiple supercomputers in the DoD High Performance Computer Modernization Program. Other examples include a 1-billion-atom model of material deformation; a 2.64-million-atom model of the complex protein-producing organelle of all living organisms, the ribosome, in 2005; a complete simulation of the life cycle of Mycoplasma genitalium in 2012; and the Blue Brain project at EPFL (Switzerland), begun in May 2005 to create the first computer simulation of the entire human brain, right down to the molecular level.
The log scaler is an occupation in the timber industry. The Log Scaler measures the cut trees to determine the scale (volume) and quality (grade) of the wood to be used for manufacturing. When logs are sold, in order to determine the basis for a sale price in a standard way, the logs are "scaled" which means they are measured, identified as to species, and deductions for defects assigned to produce a net volume of merchantable wood. There are several different scales or rules that are used to determine the volume of wood. Scribner Decimal C rule is based on diagrams of circles that show the number of boards that will be utilized from the diameters of logs. The cubic rule, often called Metric in Canada, determines the cubic volume of the log material. The logs are recorded as gross scale (actual log measurements, length and diameter) and net scale (volume after deductions for defects are taken out). This occupation is usually performed by a third party organization qualified to "scale" government timber. Since internal defects are determined by external indications, scaling is not an exact science and is subject to interpretation of log scaling rules. The log scaler is subject to random "check scales" in which another scaler rescales exactly the same logs and the results are compared. The log scaler must be within + or - 1% of the gross scale and + or - 2% of the net scale to keep their certification to scale. The scale is used for payment, quality control and inventory purposes. (Full article...)
Tree trunks are measured at the height of an adult's breast, which is defined differently in different countries and situations. In many countries, DBH is measured at approximately 1.3 m (4.3 ft) above ground. (Full article...)
In the 17th century, the buccaneer Alexandre Exquemelin recorded the use of mahogany or Caoba (Cedrela being the Spanish name) on Hispaniola for making canoes: "The Indians make these canoes without the use of any iron instruments, by only burning the trees at the bottom near the root, and afterwards governing the fire with such industry that nothing is burnt more than what they would have..."
The wood first came to the notice of Europeans with the beginning of Spanish colonisation in the Americas. A cross in the Cathedral at Santo Domingo, bearing the date 1514, is said to be mahogany, and Philip II of Spain apparently used the wood for the interior joinery of the palace El Escorial, begun in 1584. However, caoba, as the Taino Natives called the wood, was principally reserved for shipbuilding, and it was declared a royal monopoly at Havana in 1622. Hence very little of the mahogany growing in Spanish controlled territory found its way to Europe.
After the French established a colony in Saint Domingue (now Haiti), some mahogany from that island probably found its way to France, where joiners in the port cities of Saint-Malo, Nantes, La Rochelle and Bordeaux used the wood to a limited extent from about 1700. On the English-controlled islands, especially Jamaica and the Bahamas, mahogany was abundant but not exported in any quantity before 1700. (Full article...)
Its 48 endorsed national forest certification systems represent more than 280 million hectares (690×10^6 acres) of certified forests. This makes it the largest forest certification system in the world, covering about two-thirds of the globally certified forest area. It is based in Geneva, Switzerland. (Full article...)
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Clearcutting, clearfelling or clearcut logging is a forestry/logging practice in which most or all trees in an area are uniformly cut down. Along with shelterwood and seed tree harvests, it is used by foresters to create certain types of forest ecosystems and to promote select species that require an abundance of sunlight or grow in large, even-age stands. Clearcutting is a forestry practice that mimics the stand initiation stage of forest succession after a natural disturbance such as stand replacing fire or wind-throw, and is successful for regeneration of fast growing, sun tolerant tree species and wildlife species that readily regenerate in post-stand replacing sites. Logging companies and forest-worker unions in some countries support the practice for scientific, safety and economic reasons, while detractors consider it a form of deforestation that destroys natural habitats and contributes to climate change. Environmentalists, traditional owners, local residents and others have regularly campaigned against clearcutting, including through the use of blockades and nonviolent direct action.
Clearcutting is the most economically efficient method of logging. It also may create detrimental side effects, such as the loss of topsoil, the costs of which are intensely debated by economic, environmental and other interests. In addition to the purpose of harvesting wood, clearcutting is used to create land for farming. Ultimately, the effects of clearcutting on the land will depend on how well or poorly the forest is managed, and whether it is converted to non-forest land uses after clearcuts.
While deforestation of both temperate and tropical forests through clearcutting has received considerable media attention in recent years, the other large forests of the world, such as the taiga, also known as boreal forests, are also under threat of rapid development. In Russia, North America and Scandinavia, creating protected areas and granting long-term leases to tend and regenerate trees—thus maximizing future harvests—are among the means used to limit the harmful effects of clearcutting. Long-term studies of clearcut forests, such as studies of the Pasoh Rainforest in Malaysia, are also important in providing insights into the conservation of forest resources worldwide. (Full article...)
Biologic carbon sequestration is a naturally occurring process as part of the carbon cycle. Humans can enhance it through deliberate actions and use of technology. Carbon dioxide (CO 2) is naturally captured from the atmosphere through biological, chemical, and physical processes. These processes can be accelerated for example through changes in land use and agricultural practices, called carbon farming. Artificial processes have also been devised to produce similar effects. This approach is called carbon capture and storage. It involves using technology to capture and sequester (store) CO 2 that is produced from human activities underground or under the sea bed.
Plants, such as forests and kelp beds, absorb carbon dioxide from the air as they grow, and bind it into biomass. However, these biological stores may be temporary carbon sinks, as long-term sequestration cannot be guaranteed. Wildfires, disease, economic pressures, and changing political priorities may release the sequestered carbon back into the atmosphere.
Carbon dioxide that has been removed from the atmosphere can also be stored in the Earth's crust by injecting it underground, or in the form of insolublecarbonate salts. The latter process is called mineral sequestration. These methods are considered non-volatile because they not only remove carbon dioxide from the atmosphere but also sequester it indefinitely. This means the carbon is "locked away" for thousands to millions of years.
To enhance carbon sequestration processes in oceans the following chemical or physical technologies have been proposed: ocean fertilization, artificial upwelling, basalt storage, mineralization and deep-sea sediments, and adding bases to neutralize acids. However, none have achieved large scale application so far. Large-scale seaweed farming on the other hand is a biological process and could sequester significant amounts of carbon. The potential growth of seaweed for carbon farming would see the harvested seaweed transported to the deep ocean for long-term burial. The IPCC Special Report on the Ocean and Cryosphere in a Changing Climate recommends "further research attention" on seaweed farming as a mitigation tactic. (Full article...)
It was established to represent forestry and wood-using businesses, from nurseries and growers, to wood processing end-users. It was created to represent the views of the industry to the Forestry Commission and the policy makers within the relevant legislatures and executives. (Full article...)
Even-aged timber management is a group of forest management practices employed to achieve a nearly coeval cohort group of foresttrees. The practice of even-aged management is often pursued to minimize costs to loggers. In some cases, the practices of even aged timber management are frequently implicated in biodiversity loss and other ecological damage. Even-aged timber management can also be beneficial to restoring natural native species succession. (Full article...)
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Stumpage is the price a private firm pays for the right to harvest timber from a given land base. It is paid to the current owner of the land. Historically, the price was determined on a basis of the number of trees harvested, or "per stump". Currently it is dictated by more standard measurements such as cubic metres, board feet, or tons. To determine stumpage, any stand that will be harvested by the firm is first assessed and appraised through processes aimed at finding the volume of timber that is to be harvested. A given stumpage rate, measured in $/volume, is then applied to the amount of timber to be harvested. The firm will then pay this price to the landowner. (Full article...)
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Line plot survey is a systematic sampling technique used on land surfaces for laying out sample plots within a rectangular grid to conduct forest inventory or agricultural research. It is a specific type of systematic sampling, similar to other statistical sampling methods such as random sampling, but more straightforward to carry out in practice.
This survey methodology is typically used to collect information about seedlings, shrubs, invasive species, signs of wildlife, need for fertilization, timber species count, and other similar types of data. For statistical control, all sample plots are a precise radius, typically 4 to 8 feet (120 to 240 cm), and must not include features outside each sampling circle. (Full article...)
Large areas of Siberia's taiga have been harvested for lumber since the collapse of the Soviet Union. Previously, the forest was protected by the restrictions of the Soviet Ministry of Forestry, but with the collapse of the Union, the restrictions regarding trade with Western nations have vanished. Trees are easy to harvest and sell well, so loggers have begun harvesting Russian taiga evergreen trees for sale to nations previously forbidden by Soviet law. (Full article...)
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Natural resources are materials that occur in a natural form within environments. These can be classified as either biotic or abiotic on the basis of their origin. The landmass and the territorial waters of Cambodia contain a rather moderate amount, array and variety of resources. Apart from water, abiotic resources, such as minerals are generally rare. Still, advanced geo-scientific technologies have produced remarkable results and re-assessments in recent years, such as the localization of offshore oil and gas depots in the Gulf of Thailand. Cambodia, on the other hand possesses a relatively wide range of biotic resources, in particular timber, forest products, rare plants and a fauna of great diversity. (Full article...)
The relascope, invented by Walter Bitterlich, is a multi-use instrument for forest inventory. It is primarily used to find the height of a tree, the basal area of a tree, and the diameter of a tree anywhere along the bole. This instrument is used mostly for applications involving variable radius sample plots in a forest survey. (Full article...)
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The log scaler is an occupation in the timber industry. The Log Scaler measures the cut trees to determine the scale (volume) and quality (grade) of the wood to be used for manufacturing. When logs are sold, in order to determine the basis for a sale price in a standard way, the logs are "scaled" which means they are measured, identified as to species, and deductions for defects assigned to produce a net volume of merchantable wood. There are several different scales or rules that are used to determine the volume of wood. Scribner Decimal C rule is based on diagrams of circles that show the number of boards that will be utilized from the diameters of logs. The cubic rule, often called Metric in Canada, determines the cubic volume of the log material. The logs are recorded as gross scale (actual log measurements, length and diameter) and net scale (volume after deductions for defects are taken out). This occupation is usually performed by a third party organization qualified to "scale" government timber. Since internal defects are determined by external indications, scaling is not an exact science and is subject to interpretation of log scaling rules. The log scaler is subject to random "check scales" in which another scaler rescales exactly the same logs and the results are compared. The log scaler must be within + or - 1% of the gross scale and + or - 2% of the net scale to keep their certification to scale. The scale is used for payment, quality control and inventory purposes. (Full article...)
Computer simulations are realized by running computer programs that can be either small, running almost instantly on small devices, or large-scale programs that run for hours or days on network-based groups of computers. The scale of events being simulated by computer simulations has far exceeded anything possible (or perhaps even imaginable) using traditional paper-and-pencil mathematical modeling. In 1997, a desert-battle simulation of one force invading another involved the modeling of 66,239 tanks, trucks and other vehicles on simulated terrain around Kuwait, using multiple supercomputers in the DoD High Performance Computer Modernization Program. Other examples include a 1-billion-atom model of material deformation; a 2.64-million-atom model of the complex protein-producing organelle of all living organisms, the ribosome, in 2005; a complete simulation of the life cycle of Mycoplasma genitalium in 2012; and the Blue Brain project at EPFL (Switzerland), begun in May 2005 to create the first computer simulation of the entire human brain, right down to the molecular level.
Two thirds of land of Japan is forest. 40% of the forests in Japan are planted forests, such as cedar and cypress. They are mainly planted after the Pacific War, in attempt to produce construction material. However, after Japan had experienced rapid economic growth, they switched construction material from wood to reinforced concrete. Moreover, cheaper import wood became more attractive, compared to domestic wood which is produced in steep mountains and requires high labor costs. Nowadays, many planted forests are too dense and need thinning.
In 2015, the Japanese forestry industry produced 20.05 million m3 volume of wood and 436.3 billion yen of production, with half of it from mushroom production. Forestry composes 0.04% of Japan's GDP. (Full article...)
The tropical and subtropical dry broadleaf forest is a habitat type defined by the World Wide Fund for Nature and is located at tropical and subtropical latitudes. Though these forests occur in climates that are warm year-round, and may receive several hundred millimeters of rain per year, they have long dry seasons that last several months and vary with geographic location. These seasonal droughts have great impact on all living things in the forest.
Deciduous trees predominate in most of these forests, and during the drought a leafless period occurs, which varies with species type. Because trees lose moisture through their leaves, the shedding of leaves allows trees such as teak and mountain ebony to conserve water during dry periods. The newly bare trees open up the canopy layer, enabling sunlight to reach ground level and facilitate the growth of thick underbrush. Trees on moister sites and those with access to ground water tend to be evergreen. Infertile sites also tend to support evergreen trees. Three tropical dry forest ecoregions, the East Deccan dry evergreen forests, the Sri Lanka dry-zone dry evergreen forests, and the Southeastern Indochina dry evergreen forests, are characterized by evergreen trees.
Though less biologically diverse than rainforests, tropical dry forests are home to a wide variety of wildlife including monkeys, deer, large cats, parrots, various rodents, and ground dwelling birds. Mammalian biomass tends to be higher in dry forests than in rain forests, especially in Asian and African dry forests. Many of these species display extraordinary adaptations to the difficult climate.
This biome is alternately known as the tropical and subtropical dry forest biome or the tropical and subtropical deciduous forest biome. (Full article...)
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A diameter tape (D-tape) is a measuring tape used to estimate the diameter of a cylinder object, typically the stem of a tree or pipe. A diameter tape has either metric or imperial measurements reduced by the value of π. This means the tape measures the diameter of the object. It is assumed that the cylinder object is a perfect circle. The diameter tape provides an approximation of diameter; most commonly used in dendrometry.
Diameter tapes are usually made of cloth or metal, and on one side of the tape have diameter measurements and on the other standard measurements (not reduced by π). (Full article...)
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Robert Marshall (January 2, 1901 – November 11, 1939) was an American forester, writer and wilderness activist who is best remembered as the person who spearheaded the 1935 founding of the Wilderness Society in the United States. Marshall developed a love for the outdoors as a young child. He was an avid hiker and climber who visited the Adirondack Mountains frequently during his youth, ultimately becoming one of the first Adirondack Forty-Sixers. He also traveled to the Brooks Range of the far northern Alaskan wilderness. He wrote numerous articles and books about his travels, including the bestselling 1933 book Arctic Village.
A scientist with a PhD in plant physiology, Marshall became independently wealthy after the death of his father in 1929. He had started his outdoor career in 1925 as forester with the U.S. Forest Service. He used his financial independence for expeditions to Alaska and other wilderness areas. Later he held two significant public appointed posts: chief of forestry in the Bureau of Indian Affairs, from 1933 to 1937, and head of recreation management in the Forest Service, from 1937 to 1939, both during the administration of President Franklin D. Roosevelt. During this period, he directed the promulgation of regulations to preserve large areas of roadless land that were under federal management. Many years after his death, some of those areas were permanently protected from development, exploitation, and mechanization with the passage of the Wilderness Act of 1964.
Defining wilderness as a social as well as an environmental ideal, Marshall promoted organization of a national group dedicated to the preservation of primeval land. In 1935, he was one of the principal founders of The Wilderness Society and personally provided most of the Society's funding in its first years. He also supported socialism and civil liberties throughout his life.
Marshall died of heart failure at the age of 38 in 1939. Twenty-five years later, partly as a result of his efforts, The Wilderness Society helped gain passage of the Wilderness Act. The Act was passed by Congress in 1964 and legally defined wilderness areas of the United States and protected some nine million acres (36,000 km2) of federal land from development, road building and motorized transportation. Today, Marshall is considered largely responsible for the wilderness preservation movement. Several areas and landmarks, including The Bob Marshall Wilderness in Montana and Mount Marshall in the Adirondacks, have been named in his honor. (Full article...)
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Traverse is a method in the field of surveying to establish control networks. It is also used in geodesy. Traverse networks involve placing survey stations along a line or path of travel, and then using the previously surveyed points as a base for observing the next point. Connected survey lines form the framework and the directions and lengths of the survey lines are measured with an angle measuring instrument and tape or chain. Traverse networks have many advantages, including:
Less reconnaissance and organization needed;
While in other systems, which may require the survey to be performed along a rigid polygon shape, the traverse can change to any shape and thus can accommodate a great deal of different terrains;
Only a few observations need to be taken at each station, whereas in other survey networks a great deal of angular and linear observations need to be made and considered;
Traverse networks are free of the strength of figure considerations that happen in triangular systems;
Scale error does not add up as the traverse is performed. Azimuth swing errors can also be reduced by increasing the distance between stations.
Pellet fuels (or pellets) are a type of solid fuel made from compressed organic material. Pellets can be made from any one of five general categories of biomass: industrial waste and co-products, food waste, agricultural residues, energy crops, and untreated lumber. Wood pellets are the most common type of pellet fuel and are generally made from compacted sawdust and related industrial wastes from the milling of lumber, manufacture of wood products and furniture, and construction. Other industrial waste sources include empty fruit bunches, palm kernel shells, coconut shells, and tree tops and branches discarded during logging operations. So-called "black pellets" are made of biomass, refined to resemble hard coal and were developed to be used in existing coal-fired power plants. Pellets are categorized by their heating value, moisture and ash content, and dimensions. They can be used as fuels for power generation, commercial or residential heating, and cooking.
Pellets are extremely dense and can be produced with a low moisture content, below 10%, that allows them to be burned with a very high combustion efficiency. Their regular geometry and small size allow automatic feeding with very fine calibration. They can be fed to a burner by auger feeding or by pneumatic conveying. Their high density permits compact storage and transport over long distance. They can be conveniently blown from a tanker to a storage bunker or silo on a customer's premises.
A broad range of pellet stoves, central heating furnaces, and other heating appliances have been developed and marketed since the mid-1980s. With the surge in the price of fossil fuels since 2005, the demand for pellet heating has increased in Europe and North America, and a sizable industry is emerging. According to the International Energy AgencyTask 40, wood pellet production more than doubled between 2006 and 2010 to over 14 million tons. In a 2012 report, the Biomass Energy Resource Center says that it expects wood pellet production in North America to double again in the next five years. (Full article...)
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A nature reserve (also known as a wildlife refuge, wildlifesanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, funga, or features of geological or other special interest, which is reserved and managed for purposes of conservation and to provide special opportunities for study or research. They may be designated by government institutions in some countries, or by private landowners, such as charities and research institutions. Nature reserves fall into different IUCN categories depending on the level of protection afforded by local laws. Normally it is more strictly protected than a nature park. Various jurisdictions may use other terminology, such as ecological protection area or private protected area in legislation and in official titles of the reserves. (Full article...)
CI's work focuses on science, policy and partnership with businesses, governments and communities. The organization employs nearly 1,000 people and works with more than 2,000 partners in 29 countries. CI has helped support 1,200 protected areas and interventions across 77 countries, protecting more than 13 million square kilometers (5 million square miles) of land and sea. (Full article...)
In current usage, the term remote sensing generally refers to the use of satellite- or airborne-based sensor technologies to detect and classify objects on Earth. It includes the surface and the atmosphere and oceans, based on propagated signals (e.g. electromagnetic radiation). It may be split into "active" remote sensing (when a signal is emitted by a sensor mounted on a satellite or aircraft to the object and its reflection is detected by the sensor) and "passive" remote sensing (when the reflection of sunlight is detected by the sensor). (Full article...)
where is the diameter at breast height of the ith tree. Compared to the arithmetic mean, QMD assigns greater weight to larger trees – QMD is always greater than or equal to arithmetic mean for a given set of trees. QMD can be used in timber cruises to estimate the standing volume of timber in a forest, because it has the practical advantage of being directly related to basal area, which in turn is directly related to volume. QMD can also be calculated as:
where BA is stand basal area, n is the number of trees, and k is a constant based on measurement units - for BA in ft2 and DBH in inches, k=0.005454; for BA in m2 and DBH in cm, k=0.00007854. (Full article...)
Despite the increased levels of concern in the run-up to the 1992 Earth Summit held in Rio de Janeiro, tensions between the North and the global South over access to finance and technology for the preservation of forests protracted negotiations. Although many Northern countries had hoped for a legally binding convention, the resulting Statement of Forest Principles represents the "mean position of the lowest common denominator" and is voluntary. Disappointed with the outcome of the Earth Summit, NGOs such as the World Wide Fund for Nature (WWF) began to turn their attention to industry for a governance-oriented resolution to deforestation.
In the lead-up to the Earth Summit, social groups, NGOs, and industries were also beginning to consult on the issue of deforestation. In America, the consultation process that eventually led to the establishment of the FSC was initiated in 1990 and concluded in the confirmation of support for the development of a voluntary worldwide certification and accreditation governance system that would cover all forest types.
In the UK, NGO WWF began to facilitate action through the establishment of the 1995 Group, recruiting organizations that had been spurred on by instances of direct action and boycotting over the sale of tropical wood to form an NGO-business partnership. Through stakeholder involvement, it became apparent that a standard-setting body would be required to verify the source of wood products and define sustainable forest management. After 18 months of consultation in ten different countries, the Forest Stewardship Council was established in 1993.
The failure of governments to reach any notable form of consensus in the form of an internationally reaching and legally binding agreement caused both disillusionment and an opportunity for change through the involvement of civil society and business actors to form "soft law". As such the establishment of the Forest Stewardship Council as the response to this disillusionment also represents a global shift from government to governance and its creation is a primary example of the use of market and economic factors to create movement on a global environmental issue.
In February 2012, the membership approved the first major revision to the 10 Principles and associated Criteria (FSC P&C), which form the basis for all FSC standards and certification, in order to bring its certification up to date. The review and revision of the FSC P&C began in 2008 and gathered feedback from many FSC members and other stakeholders. This revision also marked the start of a process of developing baseline requirements for each of the revised Criteria. These requirements – called International Generic Indicators (IGIs) – are intended to ensure consistent application of the FSC P&C across all countries. Where national standards are not currently established, the IGIs will be used as interim standards.
On 25 September 2009, the first FSC Friday took place in Bonn. FSC Friday is a once-a-year promotional event dedicated to the celebration of forests around the globe and the promotion of responsible forest management worldwide. (Full article...)
Human activities have led to an ongoing biodiversity loss and an accompanying loss of genetic diversity. This process is often referred to as Holocene extinction, or sixth mass extinction. For example, it was estimated in 2007 that up to 30% of all species will be extinct by 2050. Destroying habitats for farming is a key reason why biodiversity is decreasing today. Climate change also plays a role. This can be seen for example in the effects of climate change on biomes. This anthropogenic extinction may have started toward the end of the Pleistocene, as some studies suggest that the megafaunal extinction event that took place around the end of the last ice age partly resulted from overhunting. (Full article...)
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Sir Wilhelm Philipp Daniel SchlichKCIEFRSFLS (28 February 1840 in Flonheim – 28 September 1925 in Oxford), also known as William Schlich, was a German-born forester who worked extensively in India for the British administration. As a professor at Cooper's Hill, he influenced colonial forestry across the British colonies. His major work was a five volume Manual of Forestry (1889–96). (Full article...)
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Cork is an impermeablebuoyant material. It is the phellem layer of bark tissue which is harvested for commercial use primarily from Quercus suber (the cork oak), which is native to southwest Europe and northwest Africa. Cork is composed of suberin, a hydrophobic substance. Because of its impermeable, buoyant, elastic, and fire retardant properties, it is used in a variety of products, the most common of which is wine stoppers.
The montado landscape of Portugal produces approximately half of the cork harvested annually worldwide, with Corticeira Amorim being the leading company in the industry. Cork was examined microscopically by Robert Hooke, which led to his discovery and naming of the cell.
Natural resources are materials that occur in a natural form within environments. These can be classified as either biotic or abiotic on the basis of their origin. The landmass and the territorial waters of Cambodia contain a rather moderate amount, array and variety of resources. Apart from water, abiotic resources, such as minerals are generally rare. Still, advanced geo-scientific technologies have produced remarkable results and re-assessments in recent years, such as the localization of offshore oil and gas depots in the Gulf of Thailand. Cambodia, on the other hand possesses a relatively wide range of biotic resources, in particular timber, forest products, rare plants and a fauna of great diversity. (Full article...)
Underwater logging is the process of logging trees from underwater forests. When artificial reservoirs and dams are built, large areas of forest are often inundated; although the trees die, the wood is often preserved. The trees can then be felled using special underwater machinery and floated up to the surface. One such machine is the sawfish harvester. There is an ongoing debate to determine whether or not underwater logging is a sustainable practice and if it is more environmentally sustainable than traditional logging.
Underwater logging has been introduced in select locations around the world, including Ghana's Lake Volta, the largest reservoir by surface area in the world.
A related form of logging consists of salvaging logs which loggers have abandoned after they became waterlogged and sank. This activity can be quite profitable, since the prime "targets" are decades-old trees of a size and species difficult or impossible to find in their natural habitat. (Full article...)
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Energy forestry is a form of forestry in which a fast-growing species of tree or woody shrub is grown specifically to provide biomass or biofuel for heating or power generation.
Forest industry in Finland consists of mechanical (timber) and chemical (paper and pulp) forest industry. Finland is one of the world's largest producer of pulp, paper and cardboard and one of Europe's largest producers of sawn timber. The forest industry directly and indirectly employs approximately 160,000 people in Finland. The industry's multiplier effects extend broadly into surrounding society.
Log driving had begun by the 17th century in Finland (tukinuitto) with long rivers such as Oulujoki, Iijoki and Kemijoki being used. The total length of timber-floating routes in Finland was 40,000 km. Given the economic importance of the activity, the Finnish water act states that "unless otherwise provided by law, everyone has the right, without inflicting unnecessary damage, harm or disturbance, to… float timber in the water body…". A log driver competitions is still organised in Finland annually – the Tukkilaiskisat.
In 2014 the value of production of forest industry in Finland, including furniture industry, was 20.7 billion euros. This was 18% of all industrial production. Forest industry employed 15% of industrial workers in Finland. The forest industry is the main source of income for many regions in Finland. It accounts for approximately 20 per cent of all Finnish exports.
Chemical forest industry (also known as paper and pulp industry) produces paper, cardboard and pulp. Finland has 25 paper mills, 14 cardboard mills and 15 pulp mills. In 2014 they employed 22 000 people.
Mechanical forest industry produces wooden items mechanically: sawing, turning and glueing. Sawmills are the largest employer of the sector. Sawmills and board production are highly automatised, but manual skills are still needed in carpentry. Mechanical forest industry employs 26 000 people in Finland. In addition 9000 have a job in furniture production. There are also about 130 industrial sawmills as well as other companies in the wood products industry.
The largest companies are Stora Enso, UPM-Kymmene and Metsä Board. In 2005–2015 they had to jettison almost half of their employees as the paper production was declining. The companies search new growth in packaging materials and wood-based chemicals. (Full article...)
The smalltooth sand tiger or bumpytail ragged-tooth (Odontaspis ferox) is a species of mackerel shark in the familyOdontaspididae, with a patchy but worldwide distribution in tropical and warm temperate waters. They usually inhabit deepwater rocky habitats, though they are occasionally encountered in shallow water, and have been known to return to the same location year after year. This rare species is often mistaken for the much more common sand tiger shark (Carcharias taurus), from which it can be distinguished by its first dorsal fin, which is larger than the second and placed further forward. It grows to at least 4.1 m (13 ft) in length. They have also been recently sighted in Irish and English waters.
Very little is known of the biology and behavior of the smalltooth sand tiger. It is an active predator of benthicbony fishes, invertebrates, and cartilaginous fishes. This species is thought to be ovoviviparous with oophagousembryos like other mackerel sharks. In contrast to its formidable size and appearance, this shark is harmless, having never been known to behave aggressively towards humans. Concern exists that its numbers are declining due to human activities in the Mediterranean and elsewhere, though existing data are inadequate for a full assessment of its conservation status. (Full article...)
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The bramble shark (Echinorhinus brucus) is one of the two species of sharks in the familyEchinorhinidae. Aside from the eastern Pacific Ocean, it is found in tropical and temperate waters worldwide. This rarely encountered shark swims close to the bottom of the seafloor, typically at depths of 400–900 m (1,300–3,000 ft), though it may enter much shallower water. The bramble shark has a stout body with two small dorsal fins positioned far back and no anal fin. It can be readily identified by the large, thornlike dermal denticles scattered over its body, some of which may be fused together. It is purplish brown or black in color and grows up to 3.1 m (10 ft) long.
The diet of the bramble shark includes smaller sharks, bony fishes, and crabs, which this slow-moving species may capture via suction. It is aplacental viviparous, with females producing litters of 15–52 pups. Harmless to humans, it is an occasional bycatch of commercial and recreational fishers, and may be used for fishmeal and liver oil. Its population has declined substantially in the northeastern Atlantic since the 18th and 19th centuries, likely because of overfishing. (Full article...)
The snaggletooth shark, or fossil shark (Hemipristis elongata), is a species of weasel shark in the familyHemigaleidae, and the only extant member of the genus Hemipristis. It is found in the Indo-West Pacific, including the Red Sea, from southeast Africa to the Philippines, north to China, and south to Australia, at depths from 1 to 130 meters. This shark can be found near the bottom of the water column of coastal areas, but can be found at continental and insular shelves. Its length is up to 240 cm (7.87 ft) . Despite being only vulnerable to extinction, this shark is very rarely seen. (Full article...)
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Pristiophorus is a genus of sawsharks found in the Pacific, Atlantic and Indian oceans. Members of this genus differ from sixgill sawsharks of the genus Pliotrema in having five gill slits. Their rostral sawteeth lack prominent transverse ridges on the basal ledges, and the large teeth are not posteriorly serrated. (Full article...)
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The largespine velvet dogfish (Scymnodon macracanthus) is a shark of the familySomniosidae, found on the lower continental slopes between latitudes50°S and 54°S in the southeast Pacific Ocean from the Straits of Magellan, and the southwest Pacific from New Zealand, at depths of between 650 and 920 m (2,130 and 3,020 ft). Its length is up to 68 cm (27 in). It was originally in the genus Centroscymnus because of the shape of its dermal denticles and dorsal fin spines but some argued to put it in the genus Scymnodon because of its shape of dermal denticles. While some wanted to allocate these in Centroscymnus because of the shape of its lower teeth but later it was allocated to a distinct genus called Proscymnodon. (Full article...)
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The floral banded wobbegong (Orectolobus floridus) is a recently described species of carpet shark found in the Indian Ocean, at depths of 42 to 85 meters, off southwestern Australia. With a maximum length of up to 75 cm (30 in), it is among the smallest wobbegongs. The physical characteristics consist of a striking color pattern of yellowish-brown bands, blotches, spots, and reticulations. (Full article...)
The bigeye thresher (Alopias superciliosus) is a species of thresher shark, family Alopiidae, found in temperate and tropical oceans worldwide. Like the other thresher sharks, nearly half its total length consists of the elongated upper lobe of the tail fin. Its common name comes from its enormous eyes, which are placed in keyhole-shaped sockets that allow them to be rotated upward. This species can also be distinguished by a pair of deep grooves on the top of its head, from which its scientific name is derived.
The large eyes of the bigeye thresher are adapted for hunting in low light conditions. It is one of the few sharks that conduct a diel vertical migration, staying in deep water during the day and moving into surface waters at night to feed. To protect its sensitive brain and eyes from the temperature changes accompanying these movements, the bigeye thresher has a vascular exchange system called the rete mirabile around those organs. This species feeds mainly on fish and squid, which are stunned via whip-like strikes of the long tail. Bigeye threshers are ovoviviparous, usually bearing litters of two pups. The embryos are oophagous and feed on ova produced by the mother while inside the uterus. This shark is caught by commercial fisheries across its range; the meat is not highly regarded but the skin, fins, and liver oil are valued. It has been assessed as Vulnerable by the International Union for Conservation of Nature (IUCN). (Full article...)
The sand tiger shark (Carcharias taurus), grey/gray nurse shark (in Australia), spotted ragged-tooth shark (in South Africa), or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It inhabits the continental shelf, from sandy shorelines (hence the name sand tiger shark) and submerged reefs to a depth of around 191 m (627 ft). They dwell in the waters of Japan, Australia, South Africa, and the east coasts of North and South America. The sand tiger shark also inhabited the Mediterranean, however it was last seen there in 2003 and is presumed extirpated. Despite its common names, it is not closely related to either the tiger shark (Galeocerdo cuvier) or the nurse shark (Ginglymostoma cirratum).
Despite its fearsome appearance and strong swimming ability, it is a relatively placid and slow-moving shark with no confirmed human fatalities. This species has a sharp, pointy head, and a bulky body. The sand tiger's length can reach 3.2 m (10.5 ft) but is normally 2.2–2.5 m in length. They are grey with reddish-brown spots on their backs. Shivers (groups) have been observed to hunt large schools of fish. Their diet consists of bony fish, crustaceans, squid, skates and other sharks. Unlike other sharks, the sand tiger can gulp air from the surface, allowing it to be suspended in the water column with minimal effort. During pregnancy, the most developed embryo will feed on its siblings, a reproductive strategy known as intrauterine cannibalism i.e. "embryophagy" or, more colorfully, adelphophagy—literally "eating one's brother". The sand tiger is categorized as critically endangered on the International Union for Conservation of Nature Red List. It is the most widely kept large shark in public aquariums owing to its tolerance for captivity. (Full article...)
The birdbeak dogfish has a very long, narrow snout, no anal fin, two long and low dorsal fins with grooved spines, small rectangular pectoral fins, and pitchfork-like denticles. It lives at depths between 73 and 1,450 m. It is ovoviviparous with up to 12 pups per litter. It eats bony fish and shrimp.
A study published in the Journal of the Marine Biological Association of the United Kingdom evaluated the reproductive strategy of the female deep-water shark birdbeak dogfish. This research article discovers that there is a close relationship that exists between Hg level of pregnant females and the Hg level of their embryos, which indicates that there is a transfer of mercury from maternal sources. Therefore, there is a matrophoric strategy for the birdbeak dogfish that are ovoviviparous.
With the rise of fisheries, the birdbeak dogfish is being consumed at higher rates. It has been found to be a good source of minerals, such as potassium and sodium. However, there have been health risks associated with frequent consumption of female dogfish. (Full article...)
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The spinner shark (Carcharhinus brevipinna) is a type of requiem shark, in the family Carcharhinidae, named for the spinning leaps it makes as a part of its feeding strategy. This species occurs in tropical and warm temperate waters worldwide, except for in the eastern Pacific Ocean. It is found from coastal to offshore habitats to a depth of 100 m (330 ft), though it prefers shallow water. The spinner shark resembles a larger version of the blacktip shark (C. limbatus), with a slender body, long snout, and black-marked fins. This species can be distinguished from the blacktip shark by the first dorsal fin, which has a different shape and is placed further back, and by the black tip on the anal fin (in adults only). It attains a maximum length of 3 m (9.8 ft).
Spinner sharks are swift and gregarious predators that feed on a wide variety of small bony fishes and cephalopods. When feeding on schools of forage fish, they speed vertically through the school while spinning on their axis, erupting from the water at the end. Like other members of its family, the spinner shark is viviparous, with females bearing litters of three to 20 young every other year. The young are born in shallow nursery areas near the coast, and are relatively fast-growing. This species is not usually dangerous to humans, but may become belligerent when excited by food. Spinner sharks are valued by commercial fisheries across their range for their meat, fins, liver oil, and skin. They are also esteemed as strong fighters by recreational fishers. The International Union for Conservation of Nature has assessed this species as Vulnerable worldwide. (Full article...)
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The leopard shark (Triakis semifasciata) is a species of houndshark, in the familyTriakidae. It is found along the Pacific coast of North America, from the U.S. state of Oregon to Mazatlán in Mexico. Typically measuring 1.2–1.5 m (3.9–4.9 ft) long, this slender-bodied shark is immediately identifiable by the striking pattern of black saddle-like markings and large spots over its back, from which it derives its common name. Large schools of leopard sharks are a common sight in bays and estuaries, swimming over sandy or muddy flats or rock-strewn areas near kelp beds and reefs. They are most common near the coast, in water less than 4 m (13 ft) deep.
Active-swimming predators, groups of leopard sharks often follow the tide onto intertidal mudflats to forage for food, mainly clams, spoon worms, crabs, shrimp, bony fish, and fish eggs. Most leopard sharks tend to remain within a particular area rather than undertaking long movements elsewhere, which has led to genetic divergence between populations of sharks living in different regions. This species is aplacental viviparous, meaning that the young hatch inside the uterus and are nourished by yolk. From March to June, the female gives birth to as many as 37 young after a gestation period of 10–12 months. It is relatively slow-growing and takes many years to mature.
Harmless to humans, the leopard shark is caught by commercial and recreational fisheries for food and the aquarium trade. This species is mostly fished in the waters off California where, after a period of population decline in the 1980s, new fishing regulations in the early 1990s reduced harvesting to sustainable levels. The International Union for Conservation of Nature has assessed this species as of Least Concern, while noting that local stocks may easily become overfished because of the shark's slow growth and limited migratory habits. (Full article...)
Squalus montalbani, the Philippine spurdog or Indonesian greeneye spurdog, is a relatively large species of dogfish shark native to waters off the coast of Australia, the Philippines, and Indonesia. The species was identified in 1912 from a specimen caught off the coast of Luzon Island, and has been both bycatch and a targeted species in fisheries since. Its taxonomy is complex, having been renamed in 1931, being misidentified as a type of shortspine spurdog, then being revived as a species in 2007.
It is classified as vulnerable by the International Union for Conservation of Nature (IUCN) due to past and present threats from fisheries. It is morphologically similar to several other species, which makes identification difficult. The species is identified as a member of the mitsukurii group, a species complex The similarity to other species has posed problems in identifying trends in the species, and thus, in its conservation. (Full article...)
The ginger carpetshark (Parascyllium sparsimaculatum) is a species of carpetshark of the familyParascylliidaeendemic to the waters of western Australia. It is a small fish at only 78.1 cm (2.56 ft) TL in length in females and harmless to humans. Its depth range is 204–245 m (669–804 ft) on the upper continental shelf. It is known from only three specimens, so biological and population data are lacking. It is likely not under threat due to its depth range, but its limited range may make it vulnerable to fishing. Reproduction is oviparous and embryos feed solely on yolk. (Full article...)
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The whitefin swellshark (Cephaloscyllium albipinnum) is a species of catshark, belonging to the familyScyliorhinidae, endemic to southeastern Australia. It is found 126–554 m (413–1,818 ft) down, on the outer continental shelf and upper continental slope. Reaching 1.1 m (3.6 ft) in length, this shark has a very thick body and a short, broad, flattened head with a large mouth. It is characterized by a dorsal color pattern of dark saddles and blotches over a brown to gray background, and light fin margins. When threatened the whitefin swellshark can inflate itself with water or air to increase its size. Reproduction is oviparous. As of 2019 The International Union for Conservation of Nature (IUCN) has assessed this species as Critically Endangered due to the significant decline of the population. (Full article...)
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The roughback bristle shark (Dichichthys satoi) is a species of bristle shark of the newly discovered Dichichthyidae family, and was discovered in 2024. The species can reach a length of 1.05 m (3 ft 5 in). The roughback bristle shark lives off the waters of New Zealand, at a depth of between 2,200 and 3,900 ft (670 and 1,190 m). (Full article...)
The draughtsboard shark (Cephaloscyllium isabellum) is a species of catshark, and part of the familyScyliorhinidae, so named for its "checkerboard" colour pattern of dark blotches. It is endemic to New Zealand, where it is also known as the carpet shark (which usually refers to the entire orderOrectolobiformes). This shark typically reaches 1 m (3.3 ft) in length and has a thick body with a broad, flattened head and a capacious mouth. Its two dorsal fins are placed far back on the body, with the first much larger than the second.
Occurring down to a depth of 673 m (2,208 ft), the draughtsboard shark frequents rocky reefs during the day and sandy flats at night. Its diet consists of fishes and invertebrates. When threatened by a predator, it can take water or air into its body to inflate its body, which may be the cause of its unusual habit of barking like a dog. This species is oviparous, with females laying smooth, tendril-bearing egg capsules in pairs. Draughtsboard sharks are often taken as bycatch by commercial fisheries, but are probably hardy enough to survive the experience. The International Union for Conservation of Nature (IUCN) has listed this species under Least Concern. (Full article...)
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The creek whaler (Carcharhinus fitzroyensis) is a common species of requiem shark, and part of the family Carcharhinidae, endemic to northern Australia. It frequents shallow waters close to shore, including estuaries. This small, stocky shark usually grows to 1.0–1.3 m (3.3–4.3 ft) long and is brownish in color without conspicuous fin markings. It can be identified by its long snout, large, triangular pectoral fins, and large, anteriorly positioned first dorsal fin.
The diet of the creek whaler consists mainly of small teleost fishes and crustaceans. It is viviparous, with the unborn young being sustained through a placental connection. The defined mating season lasts from May to July. Females give birth to one to seven pups annually, following a gestation period of seven to 9 months. A small number of creek whalers are caught incidentally in inshoregillnets and used for food, but the effect of fishing on its population seems to be inconsequential. As a result, the IUCN has listed this species under Least Concern. (Full article...)
The Australian sharpnose shark (Rhizoprionodon taylori) is a requiem shark, belonging to the family Carcharhinidae. It is found in the tropical waters of the western Pacific Ocean off Papua New Guinea and northern Australia, between latitudes 8°N and 28°S, from the surface to a depth of 110 m. It can grow up to a length around 70 cm. The Australian sharpnose shark is well known for its fast growth rate, which allows it to reach maturity at around one year of age. (Full article...)
The dusky smooth-hound (Mustelus canis), also called the smooth dogfish or the dog shark, is a species of houndshark in the family Triakidae. This shark is an olive grey or brown in color, and may have shades of yellow or grayish white. Females live to 16 years and males have a lifespan of 10 years. M. canis was the first shark recognised to have viral infections. (Full article...)
The broadfin shark (Lamiopsis temminckii) is a tropical whaler shark, characterized by the broad shape of its pectoral fins. They are classified as requiem sharks of the family Carcharhinidae. This is one of two species in the genus Lamiopsis, the other being the Borneo broadfin shark (Lamiopsis tephrodes). The broadfin shark is native to the northern Indian Ocean, and is found close to shore. Its current status according to the IUCN is endangered. (Full article...)
The cookiecutter shark (Isistius brasiliensis), also called the cigar shark, is a species of small squaliform shark in the familyDalatiidae. This shark lives in warm, oceanic waters worldwide, particularly near islands, and has been recorded as deep as 3.7 km (2.3 mi). It migrates vertically up to 3 km (1.9 mi) every day, approaching the surface at dusk and descending with the dawn. Reaching only 42–56 cm (16.5–22 in) in length, the cookiecutter shark has a long, cylindrical body with a short, blunt snout, large eyes, two tiny spineless dorsal fins, and a large caudal fin. It is dark brown, with light-emitting photophores covering its underside except for a dark "collar" around its throat and gill slits.
The name "cookiecutter shark" refers to its feeding method of gouging round plugs, as if cut out with a cookie cutter, out of larger animals. Marks made by cookiecutter sharks have been found on a wide variety of marine mammals and fishes, and on submarines, undersea cables, and human bodies. It also consumes whole smaller prey, such as squid. Cookiecutter sharks have adaptations for hovering in the water column, and likely rely on stealth and subterfuge to capture more active prey. Its dark collar seems to mimic the silhouette of a small fish, while the rest of its body blends into the downwelling light via its ventral photophores. When a would-be predator approaches the lure, the shark attaches itself using its suctorial lips and specialized pharynx and neatly excises a chunk of the flesh using its bandsaw-like set of lower teeth. This species has been known to travel in schools.
Though rarely encountered because of its oceanic habitat, a handful of documented attacks on humans were apparently caused by cookiecutter sharks. Nevertheless, this diminutive shark is not regarded as dangerous to humans. The International Union for Conservation of Nature has listed the cookiecutter shark under least concern, as it is widely distributed, has no commercial value, and is not particularly susceptible to fisheries. (Full article...)
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The ornate wobbegong (Orectolobus ornatus) is a species of carpet shark that lives in Australia and possibly other countries in the Western Pacific Ocean. It is coloured golden brown, yellow-green and blueish-grey, and it grows to maximum 120 centimetres (3.9 ft). Described by Charles Walter De Vis in 1883, it is similar in appearance to other Australian wobbegongs and has previously been classified as the same species as the Gulf wobbegong. It is a nocturnal species, hunting at night, and it can bite humans when disturbed. The International Union for Conservation of Nature has listed it as a least-concern species. (Full article...)
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The speartooth shark (Glyphis glyphis) is a rare species of river shark, belonging to the familyCarcharhinidae. It inhabits coastal marine waters and tidal reaches of large tropical rivers in northern Australia and New Guinea. Despite being a member of the river shark genus, it is also found in near-shore marine waters, favoring highly turbid environments over a wide range of salinities. This robustly built, gray-colored shark is characterized by a short and broad snout, tiny eyes, a relatively large second dorsal fin, and a black blotch beneath each pectoral fin near the tip. Another identifying trait is its teeth, which are large, triangular, and serrated in the upper jaw and narrow, spear-like, and serrated only near the tips in the lower jaw. Adults grow to about 2.6 m (8.5 ft) long.
The finetooth shark (Carcharhinus isodon) is a species of requiem shark, in the family Carcharhinidae, found in the western Atlantic Ocean, from North Carolina to Brazil. It forms large schools in shallow, coastal waters, and migrates seasonally following warm water. A relatively small, slender-bodied shark, the finetooth shark can be identified by its needle-like teeth, dark blue-gray dorsal coloration, and long gill slits. It attains a maximum length of 1.9 m (6.2 ft). The diet of this species consists primarily of small bony fishes, in particular menhaden. Like other members of its family, it is viviparous with females giving birth to two to six pups in estuarine nursery areas every other year.
Valued for its meat, the finetooth shark forms an important component of the commercialgillnet shark fishery operating off the southeastern United States. Population assessments suggest that this fishery does not currently pose a threat to U.S. populations of the species. This shark is not known to pose a danger to humans, though it snaps vigorously when captured and should be handled with caution. (Full article...)
The Gulf catshark (Asymbolus vincenti) is a species of shark belonging to the familyPentanchidae, the deepwater catsharks. This shark is found only off the shores of southern Australia at depths between 27 and 650 metres (89 and 2,133 ft). This species can reach a length of 61 centimetres (24 in) TL. (Full article...)
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The copper shark (Carcharhinus brachyurus), bronze whaler, or narrowtooth shark is a species of requiem shark found mostly in temperatelatitudes. It is distributed in a number of separate populations in the northeastern and southwestern Atlantic, off southern Africa, in the northwestern and eastern Pacific, and around Australia and New Zealand, with scattered reports from equatorial regions. The species can be found from brackish rivers and estuaries to shallow bays and harbors, to offshore waters 100 m (330 ft) deep or more. Females are found apart from males for most of the year, and conduct seasonal migrations. A large species reaching 3.3 m (11 ft) long, the copper shark is difficult to distinguish from other large requiem sharks. It is characterized by its narrow, hook-shaped upper teeth, lack of a prominent ridge between the dorsal fins, and plain bronze coloration.
Feeding mainly on cephalopods, bony fishes, and other cartilaginous fishes, the copper shark is a fast-swimming predator that has been known to hunt in large groups, using their numbers to their advantage; however, for most of the time they remain solitary. Off South Africa, this species associates closely with the annual sardine run, involving millions of southern African pilchard (Sardinops sagax). Like other requiem sharks, it is viviparous, with the developing embryos mainly nourished through a placental connection formed from the depleted yolk sac. Females bear litters of 7 to 24 pups every other year in coastal nursery areas, after a gestation period of 12 or perhaps as long as 21 months. It is extremely slow-growing, with males and females not reaching maturity until 13–19 and 19–20 years of age respectively.
This species is valued by commercial and recreational fisheries throughout its range, and utilized as food. The species population size is unknown, but the IUCN's Red List assesses the species as vulnerable because it is very susceptible to population depletion due to its low growth and reproductive rates and because its numbers are believed to have declined in some areas.
Copper sharks only attack humans infrequently, but the species places tenth in the number of unprovoked attacks on people. However, the actual number of recorded shark attacks is low – 15 non-fatal, unprovoked attacks and only one fatal unprovoked attack. (Full article...)
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Ginglymostoma is a genus of shark in the familyGinglymostomatidae. There are two members in the genus. Members of this genus eat small fish and crustaceans, and are commonly quite lethargic unless provoked. Members of this genus have the ability to suck in water in order to remove snails from their shells in a manner that can be described as 'vacuum-like'. (Full article...)
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Carcharhinus is the type genus of the family Carcharhinidae, the requiem sharks. One of 12 genera in its family, it contains over half of the species therein. It contains 35 extant and eight extinct species to date, with likely more species yet to be described. (Full article...)
Catsharks of this genus have a slim body and variegated colour pattern, narrow snout, long labial furrows, equal-size dorsal fins, and small anal fin (smaller than the dorsal fins). (Full article...)
The blackmouth catshark (Galeus melastomus) is a species of deepwater catshark, belonging to the familyPentanchidae, common in the northeastern Atlantic Ocean from Iceland to Senegal, including the Mediterranean Sea. It is typically found over the continental slope at depths of 150–1,400 m (490–4,590 ft), on or near muddy bottoms. The youngest sharks generally inhabit shallower water than the older juveniles and adults. This slim-bodied species is characterized by the black interior of its mouth, a marbled pattern of pale-edged brownish saddles or blotches along its back and tail, and a prominent saw-toothed crest of enlarged dermal denticles along the upper edge of its caudal fin. It reaches lengths of 50–79 cm (20–31 in), with sharks in the Atlantic growing larger than those in the Mediterranean.
Slow-swimming but active, the blackmouth catshark is a generalist that preys on a wide variety of crustaceans, cephalopods, and fishes. Its visual and electroreceptive systems are adept at tracking moving, bioluminescent prey. This species is oviparous, with females producing batches of up to 13 egg cases throughout the year. Because of its abundance, the blackmouth catshark forms a substantial part of the bycatch of deepwater commercial fisheries across much of its range. It has low economic value and is usually discarded, though the largest sharks may be marketed for meat and leather. The International Union for Conservation of Nature (IUCN) has listed this species under Least Concern, as there is no indication that its numbers have declined despite fishing pressure. (Full article...)
Imatra is a city in Finland, located in the southeastern interior of the country. Imatra is located in the region of South Karelia, on Lake Saimaa and the River Vuoksi. The population of Imatra is approximately Expression error: Unrecognized punctuation character ""., while the sub-region has a population of approximately 37,000. It is the th most populous municipality in Finland.
Imatra lies on the border with Russia. On the other side of the border, seven kilometres (4.3 mi) away from the centre of Imatra, lies the Russian town of Svetogorsk. The city of St. Petersburg is situated 210 km (130 mi) to the southeast, the Finnish capital Helsinki is 230 km (140 mi) away and Lappeenranta, the nearest Finnish city, is 37 km (23 mi) away.
The main employers are the pulp and paper manufacturer Stora Enso Oyj, the City of Imatra, the engineering steel manufacturer Ovako Bar Oy Ab and the Finnish Border Guard. As of October 2003[update], the total number of employees was 12,423. As of December 2004[update], 1,868 people were employed by the City of Imatra. The city's nicknames include Imis, Ibiza and Nahkalippis City (leather baseball cap city). Due to its location close to the border, Russian tourists are a common sight in the city, and Russian tourism is a boon to the local economy. Most people shop in Imatra, and Imatra's tax-free sales are the third largest among Finnish cities (only Helsinki and Lappeenranta are ahead).
The name of Imatra is thought to derive from a pre-Finno-Ugric language. The lightning symbols on Imatra's coat of arms refer to the power plants that were built in the early 1920s at the Tainionskoski and Imatrankoski rapids. The coat of arms was designed by Olof Eriksson [fi] and approved by the Imatra Town Council on 9 August 1950. The Ministry of the Interior approved the coat of arms for use on 25 October of the same year. (Full article...)
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The Đa Nhim Hydroelectric Power Station is a power station on the Đa Nhim River in Vietnam. Phase 1 construction started in April 1961 and was finished in January 1964. It has installed capacity of 160 MW. Đa Nhim Lake is at an altitude of 1,042 metres (3,419 ft).
It was the first hydroelectric power station in South Vietnam. Electricity produced here supplied the central region of Vietnam but was unable to reach the large industrial centres in Saigon and Bien Hoa, which had to rely on oil for electricity generation. Two large pipes, crossing the road, carrying water from a height of 1,000 metres to Đa Nhim lake, drive the turbines of the hydropower plant. (Full article...)
The dam serves several purposes including irrigation in the Fergana Valley and hydroelectric power production. Water released from the dam can enter a canal on either side of the river downstream. The dam has two power stations located at its base, Andijan 1 and Andijan 2. The former contains four 35 MW turbine-generators and the latter contains two 25 MW Francis turbine-generators for a total installed capacity of 190 MW.
Construction on the dam began in 1969 and the generators at Andijan 1 were commissioned between 1974 and 1984. Construction at Andijan 2 began in 2007 and it was commissioned on 2 September 2010. It cost US$28.5 million of which US$15.93 million was provided by the Exim Bank of China.
The artificial lake created by this dam, the Andijan Reservoir, is fed by the Kara Darya and its tributaries Kurshab and Jazy. (Full article...)
The primary purpose of the dam is flood control; it provides flood protection for 40,000 people and over 13,000 residential structures. The dam is the final component of the Portugués and Bucana Flood Protection Project and the first dam of its type constructed by the U.S. Army Corps of Engineers in the United States or Caribbean. The final cost of the dam was estimated at $375 million; 75% is funded by the U.S. Government and 25% by the Government of Puerto Rico. It is the first dam ever built in the United States that uses the single-centered roller-compacted concrete thick arch technique.
An estimated inauguration date of October 2013 was announced in 2011 but was not met. Subsequently, an inauguration date of 28 January 2014 was also announced. The dam was structurally completed in December 2013 and inaugurated on 5 February 2014. The dam is operated by the Puerto Rico Department of Natural and Environmental Resources. (Full article...)
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The Song Loulou Power Station is a hydroelectric power plant of the Sanaga River in Cameroon. It has a power generating capacity of 384 megawatts (515,000 hp), enough to power over 257,100 homes. The Song Loulou power station is built upstream of another power station; the Edea power station. Unlike the Edea power station that mainly powers the aluminum smelter located next to it, the Song Loulou power station mainly powers homes and other industrial plants in the south of the country. (Full article...)
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The Stung Battambang 1 (or Battambang 1) is a dam planned for construction on the Battambang River in Cambodia. The river is a major tributary of the Tonlé Sap. Of the two dams planned for this river, the larger is the Stung Battambang 1. A letter of commitment has been issued by the Cambodian authorities for a pre-feasibility study of the dam by an unknown Korean company
Surrounding the dam site is the Bannan Irrigation project, covering some 20,000 hectares (49,000 acres), and the dam is understood to play a role in the irrigation of this area, as well as generating hydropower. There is little data available about reservoir size or number of people who will be displaced. The dam is one of three possible dams in the Battambang River basin; the other two would block two tributaries to the Battambang River: the Mongkol Borey River and the Sangker River. (Full article...)
Completed in 1981, it was originally envisaged to become part of the Eastern National Water Carrier, a scheme to supply water to Namibia's capital Windhoek from the Okavango River, 1,000 kilometres (620 mi) to the north on the Angolan border. The scheme was never completed. Omatako Dam today only contains floods and supplies water to the Von Bach Dam. As such, it is one of three dams supplying the capital Windhoek with water. (Full article...)
The power station located at the base of the dam will house three 84.33 MWKaplan turbine-generators for an installed capacity of 253 MW. The dam will create a reservoir covering 40 square kilometers.
The project is being developed by Centrales Hidroelectricas de Nicaragua (CHN). Brazil's Eletrobras was to fund the US$1.1 billion under a 20 to 30 year build–operate–transfer (BOT) agreement. First announced in March 2010, preliminary construction (roads, bridges and foundation) was to begin in 2011, and operations on the plant were projected to start by February 2015, after a 4-year-long construction. However, there have been many delays. In 2016, the dam project was indefinitely suspended due to Eletrobras' economic and legal troubles, in connection with the Brazilian economic crisis. The project is still stalled as of January 2020. (Full article...)
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The Murum Dam (Malay: Empangan Murum) is a gravity dam on the Murum River in Sarawak, Malaysia. Construction began in 2008, the dam's reservoir began to fill in July 2013 and the first generator was commissioned in December 2014. The fourth and final turbine became operational on 8 June 2015. Concerns have been raised about the displacement of the Dayak people and the removal of rainforest due to the construction of the dam.
The dam site is located on the Murum River, which is in the uppermost part of the Rajang River basin, 200 km (124 mi) from Bintulu. The upstream of Rajang river includes four steps, which are Pelagus, Bakun, Murum, and Belaga. The Murum Hydroelectric Project is the second Step-Hydroelectric Project of the four steps, and is 70 km (43 mi) from the constructing Bakun Hydroelectric Project downstream. (Full article...)
Located southwest of Harare, it provides the main water supply for the city. The lake was constructed over two-and-a-half years and opened to the public in 1952. The dam wall is 400 metres long.
The water is also used for irrigation purposes and commercial fishing. Some of the fishes that are found in the lake include common grass carp, tigerfish, black bream, Clarias gariepinus, yellowfish, and green-headed bream.
The lake and hinterland are protected as part of Lake Chivero Recreational Park. The lake was designated a Ramsar wetland of international importance on 3 January 2013.
Remembrance Island is a small island in the reservoir. (Full article...)
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The Trung Sơn Dam (Dự Án Nhà máy Thủy điện Trung Sơn) is a hydroelectric power station on the Ma River in northwestern Vietnam. Located in the Trung Sơn commune, Quan Hóa District, Thanh Hóa Province, it is approximately 95 kilometres (59 mi) southwest of Hòa Bình city, and 195 kilometres (121 mi) northwest of Thanh Hóa city. The dam created a reservoir which covers a large area of the Mường Lát and Quan Hóa Districts in the Thanh Hoa province as well as part of the Mộc Châu in Sơn La Province. It is approximately 9.5 kilometres (5.9 mi) from the Vietnam–Laos border. The 260 MW associated power plant became fully operational in September 2017. (Full article...)
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The Miguel Alemán Dam is on the Tonto River in the Papaloapan Region of Oaxaca state in southern Mexico, just upstream from the town of Temascal, Oaxaca, forming the Miguel Alemán Lake with an area of 47,800 hectares. The dam operates in conjunction with the Cerro de Oro Dam, located on the Santo Domingo River to control floods in the Papaloapan basin in Veracruz state. Together with the 22,000 hectare reservoir of the Cerro de Oro, which is joined by a channel to the Miguel Alemán Lake, the combined capacity is 13,380 million cubic metres. The lake formed by the dam is scenic, providing income from fishing and tourism. The northwestern shore and islands have been declared a nature reserve. The dam includes the Temascal hydroelectric plant. (Full article...)
The 4,860-meter (15,940 ft) wide and 36.5-meter (120 ft) high dam is earth-filled with an impervious core. The storage capacity is 785 million m3 of water at normal water level, with a maximum capacity of 960 million m3. The dam also supplies about 6.7 MW of hydro-electric power. (Full article...)
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The Imha Dam is an embankment dam on the Banbyeoncheon River, a tributary of the Nakdong River, 14 km (9 mi) east of Andong in Gyeongsangbuk-do province, South Korea. The purpose of the dam is flood control, water supply and hydroelectric power generation. Construction on the dam began in 1987 and it was complete in 1991. The 73 m (240 ft) tall rock-fill, central earth-core dam creates a reservoir with a capacity of 595,000,000 m3 (482,374 acre⋅ft) and supplies a 50 MW power station with water. It supplies water for both municipal and industrial uses to Gumi, Dagu, Masan, Changwon, Jinhae, Ulsan, and Busan. (Full article...)
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The Ubol Ratana Dam (pronounced: Ubon Rat), formerly known as the "Phong Neeb Dam", is a multi-purpose dam in tambon Khok Sung, Ubolratana district, approximately 50 km (31 mi) north of Khon Kaen, Khon Kaen province, Thailand. It was the first hydroelectric power project developed in Thailand's northeastern area of Isan. The dam impounds the Nam Phong, which flows into the Chi River and thence to the Mun River, a tributary of the Mekong River. The dam was given its current name by royal permission in 1966, in honour of princess Ubol Ratana, the eldest child of King Bhumibol Adulyadej. (Full article...)
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The Péligre Dam is a gravity dam located off the Centredepartment on the Artibonite River of Haiti. At 72 m (236 ft) it is the tallest dam in Haiti. The dam was created as a flood-control and an energy-providing measure in the Artibonite River Valley during the 1950s, as part of the Artibonite Valley Agricultural Project. This dam impounds Lake Péligre.
Despite its purpose of providing energy throughout Haiti, many contend that the energy provided by the dam is not distributed equitably. Furthermore, the dam has had significant environmental, social, and health consequences on the local people, who were forced to relocate as a result of the dam's completion. These are points of concern to academics, journalists, and human rights activists who, noting heavy North American involvement in the planning and construction of the dam, believe that neoliberal influences may be at play. (Full article...)
The Kpong Dam, also known as the Akuse Dam, is a hydroelectric power generating dam on the lower Volta River near Akuse in Ghana. It is owned and operated by Volta River Authority. It was constructed between 1977 and 1982. Its power station has a capacity of 148 megawatts (198,000 hp) with all four units running, though the total nameplate capacity is 160 megawatts (210,000 hp).
The project supplements power production from Akosombo Dam, for the melting of aluminium at VALCO in Tema. The project is located about 24 kilometres (15 mi) downstream of Akosombo Dam, and is about 80 kilometres (50 mi) from the city of Accra.
Because the reservoir upstream of the dam is relatively small, the plant operates as a "run-of-the-river" project, with river flow controlled at Akosombo. The design head of water at the plant is 11.75 metres (38.5 ft); the low head required the use of unusually large turbines for their power rating, with a Francis runner diameter of 8.2 metres (27 ft). The powerhouse is 148 metres (486 ft) long, 40 metres (130 ft) wide and 64 metres (210 ft). The main dam is made of earth with rockfill facing and is 18 metres (59 ft) high and 240 metres (790 ft) long. Dikes on the banks are 2,100 and 3,500 metres (6,900 and 11,500 ft) long. The spillway has a design capacity of 20,000 cubic metres per second (710,000 cu ft/s) and has 15 radial gates, each 11 metres (36 ft) wide by 13.5 metres (44 ft) high, with a total length of 280 metres (920 ft). The civil contractor for the project was Impregilo of Italy. Other components of the project include a 161 kV switchyard and transmission lines, four villages constructed to house people displaced by the project, and road construction.
In addition to power generation, the project provides irrigation water for agriculture, and municipal water supply. Bilharzia is a health hazard in the region which has increased since the construction of the dam. (Full article...)
China Guodian Corporation once intended to build the dam. Sinohydro Resources Ltd, a holding company for Sinohydro Group, was granted approval in February 2014 for six months of extensive drilling, geological mapping and prospecting in the dam concession.
The project was shelved in 2017 by Prime Minister Hun Sen due to a strong local opposition to the dam. A new coal plant will be constructed in Preah Sihanouk as a compensation. (Full article...)
The Ubol Ratana Dam (pronounced: Ubon Rat), formerly known as the "Phong Neeb Dam", is a multi-purpose dam in tambon Khok Sung, Ubolratana district, approximately 50 km (31 mi) north of Khon Kaen, Khon Kaen province, Thailand. It was the first hydroelectric power project developed in Thailand's northeastern area of Isan. The dam impounds the Nam Phong, which flows into the Chi River and thence to the Mun River, a tributary of the Mekong River. The dam was given its current name by royal permission in 1966, in honour of princess Ubol Ratana, the eldest child of King Bhumibol Adulyadej. (Full article...)
Construction on it began in April 1993 but was substantially delayed when Tropical Storm Debby struck the island on 10 September 1994. Rainfall from the storm exceeded the 1000 year estimate and ensuing floods breached the incomplete dam. The dam was eventually completed in October 1995. The dam's reservoir, Roseau Reservoir, is experiencing heavily siltation and studies are currently underway to remediate the problem. Hurricane Tomas in 2010 and a severe December 2013 storm created large landslides in the reservoir that have reduced its capacity by 30 percent. (Full article...)
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The Bujagali Power Station is a hydroelectric power station across the Victoria Nile that harnesses the energy of its namesake, the Bujagali Falls, in Uganda. Construction began in 2007 and concluded in 2012. It was officially inaugurated on 8 October 2012 by Ugandan President Yoweri Museveni and Aga Khan IV in the presence of African politicians and investors.
The 250-megawatt power station was the largest hydroelectric energy source in Uganda when it was commissioned. However, the planned Karuma and Ayago power stations would be larger. The funding for the station was a source of some concern, as investors joined and departed from the project. As of July 2014, the plant was managed by Bujagali Energy Limited, which selected Italian contractor Salini Impregilo to develop the project. (Full article...)
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Calima Lake (Spanish: Lago Calima) is the largest artificial lake in Colombia and in the American continent (South, Central and North America) with an area of 70 km2. It is located in the municipality of Darién in the Valle del Cauca Department.
The lake is part of a hydroelectric project for generating power for the department. C.V.C (Corporación Autónoma Regional del Valle del Cauca) started the construction of the lake in 1961.
Calima Lake has become a place for water sports and leisure activities. Vacation centers, restaurants, and camping zones were built near the lake. The lake is currently a popular place and is frequented by both national and international tourists, especially those from nearby cities and towns, like Cali and Buga. The elevation of the lake is 1,500 meters (4,900 feet) above sea level. (Full article...)
The dam was built in 1989 with a height of 243 metres (797 ft). The dam has an installed hydroelectric generation capacity of 1,150 megawatts (1,540,000 hp), a crest length of 390 metres (1,280 ft), and a structural volume of 17,100,000 cubic metres (600,000,000 cu ft).
The Hassan I Dam is an embankment dam located 19 kilometres (12 mi) northeast of Demnate on the Lakhdar River in Azilal Province, Morocco. Completed in 1986, the dam provides water for the irrigation of over 40,000 hectares (99,000 acres) of farmland. The dam's hydroelectric power plant also generates 132 gigawatt-hours (480 TJ) on average annually. At 145 metres (476 ft) in height, it is the tallest dam in Morocco and the tallest earth-fill dam in Africa. The dam is named after Hassan I of Morocco. (Full article...)
Inga Falls on the Congo River is a group of rapids (or cataracts) downstream of the Livingstone Falls and the Pool Malebo. The Congo falls ~96 metres (315 ft) within this set of cataracts. The mean annual flow rate of the Congo River at Inga Falls is ~42,000 cubic metres per second (1,500,000 cu ft/s). Given this flow rate and the 96-metre fall, the Inga Falls alone has a potential to generate ~39.6 gigawatts (53,100,000 hp) of mechanical energy and nearly as much electrical energy.
Inga Falls is currently the site of two large hydropower plants and is being considered for a much larger hydro power generating station known as Grand Inga. The Grand Inga project, if completed, would be the largest hydro-electric power generating facility in the world. The current project scope calls for the use of a flow rate ~26,400 cubic metres per second at a net head of ~150 metres; this is equivalent to a generating capacity of ~38.9 GW. This hydro-electric generator would be more than double the current world record holder, which is the Three Gorges Dam on the Yangtze River in China.
Grand Inga is a "run-of-the-river" hydroelectric project in which only a relatively small reservoir would be created to back up the power of the river's flow. This would be so that the net head for the hydroelectric turbines could approach 150 metres. (Full article...)
{{ Transclude list item excerpts as random slideshow | List of mountain ranges | section=Mountain ranges on Earth }} Select from Earth section, avoiding Moon
The Rieserferner Group forms the southwesternmost part of the High Tauern, its foothills running towards the southwest as far as Bruneck in the Puster Valley. Its name is derived from the Rieserferner, a glacier on the northern flank between the Hochgall (highest summit in the range at 3,436 m s.l.m.) and the Schneebiger Nock (3,358 m s.l.m.).
The Rieserferner Group is rather small in comparison with other Alpine ranges. It is, however, popular with climbers and hikers due to its prominent and steep, partly glaciated summits. (Full article...)
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The Chiapas Highlands, also known as the Central Highlands of Chiapas or Chiapas Plateau (Spanish: Los Altos de Chiapas), is a geographic, sociocultural and administrative region located in Chiapas, the southernmost state of Mexico. (Full article...)
The Bridger Mountains are a short subrange of the Rocky Mountains, approximately 40 miles (64 km) long, in central Wyoming in the United States. The range forms a bridge between the Owl Creek Mountains to the west and the southern end of the Bighorn Mountains to the east. The Wind River passes through the gap between the range and the Owl Creek Mountains. Bridger Creek passes through the gap between the range and the Bighorns. The highest point in the range is Copper Mountain at 8,317 feet (2,535 m). The range is named after Jim Bridger, who pioneered the Bridger Trail through the mountains from southern Wyoming into the Bighorn Basin in 1864. Bates Creek in the eastern part of the range is the location of Bates Battlefield, a significant battle on July 4, 1874, in which the U.S. Army soldiers from Camp Brown (Today's Fort Washakie) with 167 Shoshone scouts attacked the village of Chief Black Coal (Northern Arapaho), killing at least 34 Northern Arapahos.
The Central Range is a mountain range on the island of Trinidad. It extends diagonally across the island and is a low-lying range rising from swampy areas into rolling hills. The tallest hills in the range are Mount Tamana (307 m), Mount Harris and Brigand Hill; all located in the northeastern portion of the range. The Central Range mountains are biodiverse, and are home to the Tamana Caves - the site of Trinidad's largest bat roost. Howler monkeys can be found here and numerous species of birds as well.
There are numerous streams and clean springs that flow from the Central Range. However there are few waterfalls. The most prominent of these falls are the Brasso Venado falls in Brasso Venado, and Gran Couva falls, or Carmelita falls, located in Gran Couva. To the north of the range are the Northern Lowlands (East–West Corridor and Caroni Plain). (Full article...)
The Purcells are shown on some United States maps as the Percell Mountains, where their southern limit protrudes into the states of Idaho and Montana, abutting Lake Koocanusa, a reservoir on the Kootenai River. American geographic classifications consider the Percells to be part of the Rocky Mountains but in Canada that terminology is reserved for ranges on the east side of the Rocky Mountain Trench. In the Purcell Mountains, most of the peaks are near or above 10,000 feet in elevation.
The Kunlun Mountains constitute one of the longest mountain chains in Asia, extending for more than 3,000 kilometres (1,900 mi). In the broadest sense, the chain forms the northern edge of the Tibetan Plateau south of the Tarim Basin. Located in Western China, the Kunlun Mountains have been known as the "Forefather of Mountains" in China.
The exact definition of the Kunlun Mountains varies over time. Older sources used Kunlun to mean the mountain belt that runs across the center of China, that is, Altyn Tagh along with the Qilian and Qin Mountains. Recent sources have the Kunlun range forming most of the south side of the Tarim Basin and then continuing east, south of the Altyn Tagh. Sima Qian (Records of the Grand Historian, scroll 123) says that Emperor Wu of Han sent men to find the source of the Yellow River and gave the name Kunlun to the mountains at its source. The name seems to have originated as a semi-mythical location in the classical Chinese text Classic of Mountains and Seas. (Full article...)
A chapada (Portuguese pronunciation:[ʃaˈpadɐ]) is a plateau found in the Brazilian Highlands. The chapadas, which are usually described as mountain ranges, are capped by horizontal strata of sandstone. They show the original surface, which has been worn away by the rivers, leaving here and there broad flat-topped ridges between river basins and narrower ranges of hills between river courses. From the valleys their rugged, deeply indented escarpments, stretching away to the horizon, they have the appearance of a continuous chain of mountains. (Full article...)
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The Cuchilla de Haedo (Haedo Range) is a low range of hills located in the north-northwest of Uruguay, to the west of Tacuarembó, and running southwest toward Paysandú. It climbs no more than 500 m in height. This ridge is separated from the Cuchilla Grande to the south by the Río Negro valley. (Full article...)
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The Kunlun Mountains constitute one of the longest mountain chains in Asia, extending for more than 3,000 kilometres (1,900 mi). In the broadest sense, the chain forms the northern edge of the Tibetan Plateau south of the Tarim Basin. Located in Western China, the Kunlun Mountains have been known as the "Forefather of Mountains" in China.
The exact definition of the Kunlun Mountains varies over time. Older sources used Kunlun to mean the mountain belt that runs across the center of China, that is, Altyn Tagh along with the Qilian and Qin Mountains. Recent sources have the Kunlun range forming most of the south side of the Tarim Basin and then continuing east, south of the Altyn Tagh. Sima Qian (Records of the Grand Historian, scroll 123) says that Emperor Wu of Han sent men to find the source of the Yellow River and gave the name Kunlun to the mountains at its source. The name seems to have originated as a semi-mythical location in the classical Chinese text Classic of Mountains and Seas. (Full article...)
There have been very few sightings of wildlife in the Inglefield Mountains because the mountains are north of the Arctic tree line and because of the harsh cold climate. However, the areas nunataks may support one-third of the nationally vulnerable Canadian ivory gull population. During the 1980s, the rock outcrops supported between 730 and 830 adult ivory gulls. (Full article...)
The western part of the range was named the Kamnik Alps (German: Steiner Alpen) in 1778 by the scientists Belsazar Hacquet and Franz Xaver von Wulfen, after the town of Kamnik (Stein) in the valley of the Kamnik Bistrica River. Its eastern part was named the Savinja Alps (Sanntaler Alpen) or Solčava Alps (Sulzbacher Alpen) by the mountaineer Johannes von Frischauf in 1875, after the settlement of Solčava (Sulzbach) and the main river, the upper Savinja (Sann). (Full article...)
The Apennines or Apennine Mountains (/ˈæpənaɪn/AP-ə-nyne; Ancient Greek: Ἀπέννινα ὄρη or Ἀπέννινον ὄρος; Latin: Appenninus or Apenninus Mons– a singular with plural meaning; Italian: Appennini[appenˈniːni]) are a mountain range consisting of parallel smaller chains extending c. 1,200 km (750 mi) the length of peninsularItaly. In the northwest they join the Ligurian Alps at Altare. In the southwest they end at Reggio di Calabria, the coastal city at the tip of the peninsula. Since 2000 the Environment Ministry of Italy, following the recommendations of the Apennines Park of Europe Project, has defined the Apennines System to include the mountains of north Sicily, a total distance of 1,500 kilometres (930 mi). The system forms an arc enclosing the east of the Ligurian and Tyrrhenian seas.
The Apennines conserve some intact ecosystems that have survived human intervention. In these are some of the best-preserved forests and montane grasslands in Europe, now protected by national parks and, within them, a high diversity of flora and fauna. These mountains are one of the last refuges of the big European predators such as the Italian wolf and the Marsican brown bear, now extinct in the rest of Central Europe.
The mountains lend their name to the Apennine peninsula that forms the major part of Italy. They are mostly verdant, although one side of the highest peak, Corno Grande, is partially covered by Calderone glacier, the only glacier in the Apennines. The eastern slopes down to the Adriatic Sea are steep, whilst the western slopes form foothills on which most of the towns of peninsular Italy are located. The mountains tend to be named after the province or provinces in which they are located; for example the Ligurian Apennines are in Liguria. (Full article...)
The geography of Ireland comprises relatively low-lying mountains surrounding a central plain, with several navigable rivers extending inland. Its lush vegetation is a product of its mild but changeable climate which is free of extremes in temperature. Much of Ireland was woodland until the end of the Middle Ages. Today, woodland makes up about 10% of the island, compared with a European average of over 33%, with most of it being non-native conifer plantations. The Irish climate is influenced by the Atlantic Ocean and thus very moderate, and winters are milder than expected for such a northerly area, although summers are cooler than those in continental Europe. Rainfall and cloud cover are abundant.
Gaelic Ireland had emerged by the 1st century AD. The island was Christianised from the 5th century onwards. During this period Ireland was divided amongst petty kings, who in turn served under the kings of the traditional provinces (Cúige; lit.'fifth') vying for dominance and the title of High King of Ireland. Between the late 8th and early 11th centuries, Viking raids and settlement took place culminating in the Battle of Clontarf on 23 April 1014 which resulted in the ending of Viking power in Ireland. Following the 12th-century Anglo-Norman invasion, England claimed sovereignty. However, English rule did not extend over the whole island until the 16th–17th century Tudor conquest, which led to colonisation by settlers from Britain. In the 1690s, a system of Protestant English rule was designed to materially disadvantage the Catholic majority and Protestant dissenters, and was extended during the 18th century. With the Acts of Union in 1801, Ireland became a part of the United Kingdom. A war of independence in the early 20th century was followed by the partition of the island, leading to the creation of the Irish Free State, which became increasingly sovereign over the following decades until it declared a republic in 1948 (Republic of Ireland Act, 1948) and Northern Ireland, which remained a part of the United Kingdom. Northern Ireland saw much civil unrest from the late 1960s until the 1990s. This subsided following the Good Friday Agreement in 1998. In 1973, both the Republic of Ireland and the United Kingdom, with Northern Ireland as part of it, joined the European Economic Community. Following a referendum vote in 2016, the United Kingdom, Northern Ireland included, left the European Union (EU) in 2020. Northern Ireland was granted a limited special status and allowed to operate within the EU single market for goods without being in the European Union.
Rila (Bulgarian: Рила, pronounced[ˈriɫɐ]) is the highest mountain range of Bulgaria, the Balkan Peninsula, and Southeast Europe. It is situated in southwestern Bulgaria and forms part of the Rila–Rhodope Massif. The highest summit is Musala at an elevation of 2,925 m which makes Rila the sixth highest mountain range in Europe after the Caucasus, the Alps, Sierra Nevada, the Pyrenees and Mount Etna, and the highest one between the Alps and the Caucasus. It spans a territory of 2,629 km2 with an average elevation of 1487 m. The mountain is believed to have been named after the river of the same name, which comes from the Old Bulgarian verb "рыти" meaning "to grub".
Rila has abundant water resources. Some of the Balkans' longest and deepest rivers originate from Rila, including the Maritsa, Iskar and Mesta rivers. Bulgaria's main water divide separating the Black Sea and the Aegean Sea drainage systems follows the main ridge of Rila. The mountain range is dotted with almost 200 glacial lakes such as the renowned Seven Rila Lakes, and is rich in hot springs in the fault areas at the foothills, including the hottest spring in South-eastern Europe in Sapareva Banya.
The most recognisable landmark of the mountain range is the Rila Monastery, Bulgaria's largest and most important monastery, founded in the 10th century by Saint John of Rila. Due to its outstanding cultural and spiritual value it was declared a UNESCOWorld Heritage Site in 1983. Rila is also a popular destination for hiking, winter sports and spa tourism, hosting the nation's oldest ski resort Borovets, as well as numerous hiking trails. Some of the most important hydro power stations in Bulgaria are situated in the eastern part of the mountain range, including the Belmeken–Sestrimo–Chaira Hydropower Cascade (1,599 MW), the largest and most complex hydroelectric complex in Bulgaria. (Full article...)
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The Salish Mountains are located in the northwest corner of the U.S. State of Montana. Much of the range is bordered on the east by Flathead Lake. With peaks ranging from just under 7,000 feet tall to named hills that are a little short of 3,600 feet in elevation the Salish Mountain range is a lesser known mountain range in northwestern Montana. Many of the peaks in the range are rounded tree-covered summits but occasionally the mountain summits are found on open grassy slopes that afford great views into the surrounding valleys and neighboring mountain ranges. The Salish Mountains cover a triangle-shaped land mass of about 4,125 square miles of lush forests and peaks.
The Salish Mountains are named for the Native Americans who called this area their home for centuries before white man settled here. The Salish originated in the Pacific Northwest and were called the Flathead Indians by the first white men who came to the Columbia River. The Flatheads call themselves Salish meaning "the people".
Although never a large tribe, the Salish had a reputation for bravery, honesty, and general high character and for their friendly disposition towards the whites. When first known, about the beginning of the last century, they subsisted chiefly by hunting and the gathering of wild roots, particularly camas, dwelt in skin tipis or mat-covered lodges, and were at peace with all tribes excepting their hereditary enemies, the powerful Blackfeet who lived across the continental divide on the Great Plains. (Full article...)
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Baba (Macedonian: Баба; or Baba Mountain, Macedonian: Баба Планина, romanized: Baba Planina), also known by the name of its highest peak, Pelister (Macedonian: Пелистер), is a mountain in North Macedonia. The Pelister peak (2601 metres, or 8533 feet) overlooks the city of Bitola. Baba is the third highest mountain in North Macedonia. Other peaks besides Pelister are Dva Groba (2514 metres), Veternica (2420 metres), Musa (2350 metres), Ržana (2334 meters), Široka (2218 metres), Kozji Kamen (2199 metres), Griva (2198 metres) and Golema Čuka (2188 metres) in North Macedonia, and Belavoda (2.179 meters), Kirko. The Baba massif splits up the rivers in the region, so that they either flow towards the Adriatic Sea.
Pelister National Park's flora include the five-needle pine molika (Pinus peuce) - a unique species of tertiary age being present on only a few mountains in the Balkan Peninsula. Fauna in the area include: bears, roe deer, wolves, chamois, deer, wild boars, rabbits, several species of eagles, partridges, redbilled jackdaws, and the endemic Macedonian Pelagonia trout. In a comprehensive article published in 2002, Melovski and Godes reported that there are three large carnivores in North Macedonia which can be found in Baba and surrounds, the brown bear, the wolf and the lynx. Actual numbers at that time were difficult to estimate given that most reports came from non-scientific sources (surveys, hunters and anecdotal reports), however in 2002, it was estimated there were approximately 30 bears in N.P. Pelister and Galičica N.P hosting only 3-4. A larger number could apparently be found in the N.P Mavrovo. The numbers however may be significantly larger in today's climate given the protected status of bears in North Macedonia. In terms of wolves, there was an estimated total of 1200 wolves in the entire country of North Macedonia, with an estimated 54 lynx when the article was written.
Pelister is the oldest and second largest national park in North Macedonia after Mavrovo. It is one of the leading tourist areas in the country, since it is a well-known ski resort, along with Ohrid, Prespa, Dojran, Popova Šapka, and Kruševo.
Pelister provides views of the Pelagonia valley, Lake Prespa, Nidže, Galičica, Jakupica, and the city of Bitola. Pelister is also one of the most southern mountains in the Balkans that has an alpine character.
Pelister is also known for its two mountain lakes, which are called Pelister's Eyes. The Big lake is 2,218 metres above the sea level while the Small lake is 2,180 metres high. Here are the sources of many rivers. The climate in Pelister National Park is diverse.
On the peaks, there is snow even in July, and in some places the new snow meets the old from previous years.
On Pelister mountain, there is a TV transmitter using an additionally guyed lattice steel mast as antenna tower. (Full article...)
Karakoram's highest and the world's second-highest peak, K2, is located in Gilgit-Baltistan. The mountain range begins in the Wakhan Corridor in Afghanistan in the west, encompasses the majority of Gilgit-Baltistan, controlled by Pakistan and then extends into Ladakh, controlled by India and Aksai Chin, controlled by China. It is part of the larger Trans-Himalayan mountain ranges.
The range contains 18 summits higher than 7,500 m (24,600 ft) in elevation, with four above 8,000 m (26,000 ft): K2 (8,611 m (28,251 ft) AMSL) (the second-highest peak on Earth), Gasherbrum I, Broad Peak, and Gasherbrum II.
The range is about 500 km (311 mi) in length and is the most glaciated place on Earth outside the polar regions. The Siachen Glacier (76 km (47 mi) long) and Biafo Glacier (63 km (39 mi) long) are the second- and third-longest glaciers outside the polar regions.
The Karakoram is bounded on the east by the Aksai Chin plateau, on the northeast by the edge of the Tibetan Plateau and on the north by the river valleys of the Yarkand and Karakash rivers beyond which lie the Kunlun Mountains. At the northwest corner are the Pamir Mountains. The southern boundary of the Karakoram is formed, west to east, by the Gilgit, Indus and Shyok rivers, which separate the range from the northwestern end of the Himalaya range proper. These rivers flow northwest before making an abrupt turn southwestward towards the plains of Pakistan. Roughly in the middle of the Karakoram range is the Karakoram Pass, which was part of a historic trade route between Ladakh and Yarkand that is now inactive.
The mountain borders Emmaus just south of Allentown and comprises a ridge of low mountains passing east of Reading, and then extends due west. South Mountain is a continuation of the New England Province and is the southern end of the Hudson Highlands. The mountain is a core geographic feature throughout much of the Pennsylvania side of the Lehigh Valley. The mountain is called the Reading Prong by geologists.
Unlike Blue Mountain to its north, South Mountain does not follow a straight geographic line. The mountain ranges in elevation between 500 and 1,300 feet (150 and 400 m) above sea level. The ridge is made of metamorphic rocks and gneiss, which date to the Precambrian era and range from about 570 million to 1,600 million years old.
South Mountain is largely undeveloped in its northern extension due to conservation efforts and the mountain's steep slope. This makes it a beautiful backdrop to the viewpoints of the Lehigh Valley, including, at night, the city lights of Allentown. The southern end of the mountain extends west along U.S. Route 422 and the southeastern border of Berks County, providing views of Blue Mountain to the north, and Mount Penn, which comprises part of the prong and the city of Reading to the east.
The southernmost peaks were at one time home to many exclusive sanitariums and resorts, now all defunct except for the Caron Foundation. South Mountain serves as the transmitter site for several local radio and television stations, including the independent television stationWFMZ-TV, which maintains both its transmitter and studio facilities on the mountain, south of Allentown. (Full article...)
Views of Blue Mountain dominate the southern tier of most eastern and central Pennsylvania counties, providing an ever-visible backdrop cutting across the northern or western horizon. Most transport corridors and road beds piercing the barrier necessarily pass through large water gaps, including (west to east) the Susquehanna, Schuylkill, Lehigh and Delaware River valleys or wind gaps, low gaps in the ridge caused by ancient watercourses. The barrier ridge forms a distinct boundary between a number of Pennsylvania's geographical and cultural regions.
The Waitākere Ranges is a mountain range in New Zealand. Located in West Auckland between metropolitan Auckland and the Tasman Sea, the ranges and its foothills and coasts comprise some 27,720 hectares (68,500 acres) of public and private land. The area, traditionally known to Māori as Te Wao Nui o Tiriwa (The Great Forest of Tiriwa), is of local, regional, and national significance. The Waitākere Ranges includes a chain of hills in the Auckland Region, generally running approximately 25 kilometres (16 mi) from north to south, 25 km west of central Auckland. The ranges are part of the Waitākere Ranges Regional Park.
From 1 May 2018 the forested areas of the Waitākere Ranges Regional Park were closed, with some exceptions, while Auckland Council upgraded the tracks to dry foot standard protect the roots and to prevent the spread of kauri dieback, oomycete organisms that affect kauri trees and prevents them from getting nutrients, effectively killing them. There is no cure. But many are now marked as permanently closed, and their future is uncertain.[update] (Full article...)
The Old Man Range, also called Kopuwai, is a mountain range in Central Otago, in the South Island of New Zealand. It lies to the west of the valley of the Clutha River, close to the town of Alexandra and the artificial Lake Roxburgh. The range stretches north-south for a distance of some 40 kilometres (25 mi). Part of the range forms the border between the Otago and Southland Regions. The range's Māori name, Kopuwai, means "Water Swallower", and was the name of a mythical giant who lived in the area.
The range rises to a narrow ridge at a height of just over 1,500 metres (4,900 ft). The highest points are the 1,682 metres (5,518 ft) Obelisk (also known as The Old Man, and from which the range gets its name) at (), and Hyde Rock (1,673 metres (5,489 ft)). The eastern flanks of the range are steep, falling away to the Clutha Valley. In contrast, the western flanks fall gently to a high plateau before rising to a lower ridge known as the Old Woman Range. The plateau which has areas of both bare rock and marsh, is the source of numerous creeks, most of them part of the catchment of the young Waikaia and Earnscleugh Rivers.
The geology of the range is dominated by the schists of the Caples and Torlesse Terranes. The rock is a source of gold, and the area was worked during the Otago gold rush of the 1860s. Several remnants of the mining era can still be seen in the range.
Much of the range is conservation land controlled by the New Zealand Department of Conservation (DOC), and divided between the Kopuwai and Bain Block Conservation Areas.
Two more, much smaller, ranges of this name exist in New Zealand — a low range of hills in inland Canterbury, between Lakes Pukaki and Alexandrina, and a higher hill range in the Tasman District, close to Farewell Spit. (Full article...)
The range is a lower continuation of the Big Snowy Mountains which lie immediately to the west. The small Pike Creek Hills are 12 miles (19 km) to the east.
The mountain pass between the Big and Little Snowies is at 6,018 feet (1,834 m) where Red Hill Road crosses the range. The pass elevation is considerably lower than the peaks of the Big Snowy range, but only about 200 feet (61 m) lower than the highest of the Little Snowy Range which are just northeast of the pass. Bold Butte, a named highpoint near the center of the range, has an elevation of 5,624 feet (1,714 m).
The South Fork Flatwillow Creek runs from the north side of the pass near Red Hill and east along the north side of the range. Willow Creek and various tributaries drain most of the range to the south and flows into the Musselshell River on to the southeast. (Full article...)
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The Butler Range, also known as North Butler Range, is a range located in the Westland District of the West Coast Region on the South Island of New Zealand. The range has also been known as Peaks of the Mist Range.
The Butler Range was probably named by Charlie Douglas in the late 1890s after John Butler of Whataroa. Due to its isolation, some of its peaks had their first ascents as late as the 1940s. Named peaks of the Butler Range, from west to east, are Bamford Knob (1,845 metres or 6,053 feet), Tohunga Peak (1,926 metres or 6,319 feet), Mount Whataroa (2,123 metres or 6,965 feet; first ascended 1949), Mount Rangatira (2,157 metres or 7,077 feet), and Mount Ariki (2,193 metres or 7,195 feet; first ascended 1949). The range can be seen from State Highway 6 from where it crosses the Whataroa River.
Geographic features south of the Butler Range are Whataroa Glacier, Ice Lake, and the Butler River. The latter flows into the Whataroa River, which flows past Whataroa into the Tasman Sea. On its northern side, Butler Range is bounded by the Perth River.
Some mountaineers call the range south of the Butler River extending from King Peak to Mount Huss (located on the Main Divide) the South Butler Range; Mount Barrowman and Dog Kennel Peak are the two named intermediate peaks. To avoid confusion, Butler Range is thus sometimes referred to as North Butler Range. (Full article...)
The Sierras Pampeanas (also called Central Sierras or Pampas Sierras) (English: Pampas Mountains) is a geographical region of Argentina.
The Sierras Pampeanas are a chain of mountains that rise sharply from the surrounding pampa region of Northwest Argentina. They run parallel to the Andes Mountains and their crest line is some 540 km (340 mi) east of the Andes crest line (running from 29° to 35° S latitude at about 65° W longitude). They cross into seven Argentina provinces: San Luis, San Juan, Córdoba, La Rioja, Catamarca, Santiago del Estero and Tucumán. (Full article...)
{{ Transclude list item excerpts as random slideshow | List of dams and reservoirs | section=Africa | sectiononly=yes }} Should pick only the international dams
The Tokwe Mukosi Dam or Tugwi Mukosi Dam is a concrete-face rock-fill dam on the Tokwe River, just downstream of its confluence with the Mukosi River, about 72 kilometres (45 mi) south of Masvingo in Masvingo Province, Zimbabwe. It is 90.3 metres (296 ft) tall and creates a 1,750,000,000 m3 (1,420,000 acre⋅ft) reservoir, the largest inland dam in the country. The associated hydroelectric power station has a 12 megawatts (16,000 hp) installed capacity.
Construction on the dam began in June 1998 but stalled in 2008. Salini Impregilo began to finish the dam in 2011. Heavy flooding in February 2014 caused a partial failure on 4 February, on the downstream face of the dam. By late February the dam had not been fully breached but the unplanned rising reservoir behind the dam caused evacuations upstream. Both upstream and downstream, over 20,000 people were evacuated. Construction of the dam was suspended in June 2014 due to a lack of funding. In May 2016 the government released $35 million to Salini Impregilio to enable the Italian contractor resume construction work that stopped two years ago owing to payment problems. The Dam was eventually completed in December 2016 and commissioned in May 2017. (Full article...)
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The Gilgel Gibe III Dam is a 250m high roller-compacted concrete dam with an associated hydroelectric power plant on the Omo River in Ethiopia. It is located about 62 km (39 mi) west of Sodo in the South Ethiopia Regional State. Once fully commissioned, it will be the third largest hydroelectric plant in Africa with a power output of about 1,870 Megawatt (MW), thus more than doubling Ethiopia's total installed capacity from its 2007 level of 814 MW. The Gibe III dam is part of the Gibe cascade, a series of dams including the existing Gibe I dam (184 MW) and Gibe II power station (420 MW) as well as the planned Gibe IV (1,472 MW) and Gibe V (560 MW) dams. The existing dams are owned and operated by the state-owned Ethiopian Electric Power, which is also the client for the Gibe III Dam.
The US$1.8 billion project began in 2006 and electricity generation started in October 2015. The remaining generators were operational by 2016. The project has experienced serious delays; in May 2012, full commissioning had been scheduled for June 2013. The dam was inaugurated by Prime Minister Hailemariam Desalegn on 17 December 2016.
Local and international environmental groups forecast major negative environmental and social impacts of the dam and criticized the project's environmental and social impact assessment as insufficient. Because of this and accusations that the entire approval process for the project was suspect, funding for the full construction cost was not secured, as the African Development Bank delayed a decision about a loan pending a review of the dam's environmental impact by its compliance review and mediation unit. This dates back to August 2009 when they accepted a call from NGOs for such a review. In August 2010 Ethiopian Prime Minister Meles Zenawi vowed to complete the dam "at any cost", saying the dam's critics "don’t want to see developed Africa; they want us to remain undeveloped and backward to serve their tourists as a museum." (Full article...)
Oanob Dam is a dam outside Rehoboth, Hardap Region, Namibia. Located 7 kilometres (4.3 mi) outside Rehoboth, it dams the Oanob River and supplies the town with the majority of its water. It has a capacity of 34,505,000 cubic metres (1.2185×109 cu ft) and was completed in 1990, the year of Namibia's independence. (Full article...)
The Kpong Dam, also known as the Akuse Dam, is a hydroelectric power generating dam on the lower Volta River near Akuse in Ghana. It is owned and operated by Volta River Authority. It was constructed between 1977 and 1982. Its power station has a capacity of 148 megawatts (198,000 hp) with all four units running, though the total nameplate capacity is 160 megawatts (210,000 hp).
The project supplements power production from Akosombo Dam, for the melting of aluminium at VALCO in Tema. The project is located about 24 kilometres (15 mi) downstream of Akosombo Dam, and is about 80 kilometres (50 mi) from the city of Accra.
Because the reservoir upstream of the dam is relatively small, the plant operates as a "run-of-the-river" project, with river flow controlled at Akosombo. The design head of water at the plant is 11.75 metres (38.5 ft); the low head required the use of unusually large turbines for their power rating, with a Francis runner diameter of 8.2 metres (27 ft). The powerhouse is 148 metres (486 ft) long, 40 metres (130 ft) wide and 64 metres (210 ft). The main dam is made of earth with rockfill facing and is 18 metres (59 ft) high and 240 metres (790 ft) long. Dikes on the banks are 2,100 and 3,500 metres (6,900 and 11,500 ft) long. The spillway has a design capacity of 20,000 cubic metres per second (710,000 cu ft/s) and has 15 radial gates, each 11 metres (36 ft) wide by 13.5 metres (44 ft) high, with a total length of 280 metres (920 ft). The civil contractor for the project was Impregilo of Italy. Other components of the project include a 161 kV switchyard and transmission lines, four villages constructed to house people displaced by the project, and road construction.
In addition to power generation, the project provides irrigation water for agriculture, and municipal water supply. Bilharzia is a health hazard in the region which has increased since the construction of the dam. (Full article...)
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Ayago Hydroelectric Power Station, also Ayago Power Station, is a planned 840 megawatt hydroelectric power project to be constructed in Uganda. If it is built, Ayago would be the largest power station in Uganda, based on generating capacity. (Full article...)
The Nangbeto Dam is an embankment dam on the Mono River in the Plateaux Region of Togo. It was constructed between 1984 and 1987 for the purpose of providing hydroelectric power to both Togo and Benin as well as creating fisheries and supplying water for irrigation. The dam's 65.6 megawatts (88,000 hp) power station was commissioned in June 1987. The project was financed by the World Bank and African Development Bank at a cost of US$98.22 million.
The objectives of the dam were to satisfy the medium-term requirements of Benin and Togo for power, and to provide a large water reserve, amounting to 1.7 billion cubic metres. It was expected that 1000 to 1500 tonnes of fish would be produced each year and that 43,000 hectares of land would be irrigated. Evaluation of the project six years later showed that the project had been completed on time and on budget to a satisfactory standard. The project was a good example of cooperation between the two countries. The power generation objective was satisfied but the fish development scheme had failed and the irrigation project was proceeding at a slower rate than expected. However, initial results of the cultivation of rice on the irrigated land were encouraging.
The Nangbeto Dam serves part of Togo's needs for electricity and is subject to interruptions in supply when the water level is low, which may happen for periods of several months. As a result, a further dam on the Mono River further downstream at Adjaralla is being constructed, starting in 2016. The fish production scheme involved in this project and other environmental issues are being planned at an earlier stage in its development. (Full article...)
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The Hassan I Dam is an embankment dam located 19 kilometres (12 mi) northeast of Demnate on the Lakhdar River in Azilal Province, Morocco. Completed in 1986, the dam provides water for the irrigation of over 40,000 hectares (99,000 acres) of farmland. The dam's hydroelectric power plant also generates 132 gigawatt-hours (480 TJ) on average annually. At 145 metres (476 ft) in height, it is the tallest dam in Morocco and the tallest earth-fill dam in Africa. The dam is named after Hassan I of Morocco. (Full article...)
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The Félou Hydroelectric Plant (French: Centrale hydroélectrique de Félou) is a hydroelectric installation at the Félou Falls on the Sénégal River in Mali. It has three water turbines capable of generating 62.3 MW. The current power station replaced an older one built in the 1920s. Construction of the new power station began in October 2009 and was financed by the World Bank. It is the third Senegal River Basin Development Authority project on the river and was completed in 2014. The existing weir was refurbished with the previous 2 metres (6.6 ft) height maintained. In 1927, the previous hydroelectric power station was commissioned. It was refurbished in 1992 and had an installed capacity of 600 kW.
At maximum output, the three 21 MW turbines pass a total of 500 cubic metres per second (18,000 cu ft/s) of water. Between August and November the water flowing in the river generally exceeds this value allowing the plant to operate at full capacity and the excess water to pass over the weir. During the dry season (December to July), the electricity generated is reduced to about a third of the maximum output as the flow of water is limited to the 150–200 cubic metres per second (5,300–7,100 cu ft/s) released from the Manantali Dam.
The total estimated cost is 241 million US dollars. The construction of the plant was completed in 2014. (Full article...)
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The Wadi Wishka Dam is a concrete-face rock-fill embankment dam located on Wadi Wishka, 29 km (18 mi) southwest of Sokna in the Fezzan region of Libya. The primary purpose of the dam is flood control and water. Construction on the dam began in 2004 and it was completed in 2006 at a cost of US$5 million. (Full article...)
Completed in 1981, it was originally envisaged to become part of the Eastern National Water Carrier, a scheme to supply water to Namibia's capital Windhoek from the Okavango River, 1,000 kilometres (620 mi) to the north on the Angolan border. The scheme was never completed. Omatako Dam today only contains floods and supplies water to the Von Bach Dam. As such, it is one of three dams supplying the capital Windhoek with water. (Full article...)
Manjirenji Dam, formerly known as Lake McDougal, lies in south eastern Zimbabwe, east of Masvingo. It was built to provide irrigation water to the farming estates on the lowveld to the southwest, around the town of Chiredzi, where the main crop has been sugar cane.
Bangala Dam lies in south-eastern Zimbabwe, south of Masvingo. It was built by Concor to provide irrigation water to the farming estates on the lowveld to the southwest, around the town of Triangle, where the main crop has been sugar cane.
The Gilgel Gibe III Dam is a 250m high roller-compacted concrete dam with an associated hydroelectric power plant on the Omo River in Ethiopia. It is located about 62 km (39 mi) west of Sodo in the South Ethiopia Regional State. Once fully commissioned, it will be the third largest hydroelectric plant in Africa with a power output of about 1,870 Megawatt (MW), thus more than doubling Ethiopia's total installed capacity from its 2007 level of 814 MW. The Gibe III dam is part of the Gibe cascade, a series of dams including the existing Gibe I dam (184 MW) and Gibe II power station (420 MW) as well as the planned Gibe IV (1,472 MW) and Gibe V (560 MW) dams. The existing dams are owned and operated by the state-owned Ethiopian Electric Power, which is also the client for the Gibe III Dam.
The US$1.8 billion project began in 2006 and electricity generation started in October 2015. The remaining generators were operational by 2016. The project has experienced serious delays; in May 2012, full commissioning had been scheduled for June 2013. The dam was inaugurated by Prime Minister Hailemariam Desalegn on 17 December 2016.
Local and international environmental groups forecast major negative environmental and social impacts of the dam and criticized the project's environmental and social impact assessment as insufficient. Because of this and accusations that the entire approval process for the project was suspect, funding for the full construction cost was not secured, as the African Development Bank delayed a decision about a loan pending a review of the dam's environmental impact by its compliance review and mediation unit. This dates back to August 2009 when they accepted a call from NGOs for such a review. In August 2010 Ethiopian Prime Minister Meles Zenawi vowed to complete the dam "at any cost", saying the dam's critics "don’t want to see developed Africa; they want us to remain undeveloped and backward to serve their tourists as a museum." (Full article...)
The Beles Hydroelectric Power Plant, sometimes referred to as Beles II or Tana Beles, is a run-of-the-riverhydroelectricpower plant in Ethiopia near Lake Tana. The power plant receives water from the lake through the Tana-Belesinterbasin transfer and after utilizing it to produce electricity, the water is then discharged into the Beles River. The plant has an installed capacity of 460 MW, making it the second largest power plant in the country. It is also expected to help provide water for the irrigation of 140,000 ha (350,000 acres). It was inaugurated in May 2010 and the last generator became operational in February 2012. Its construction was negatively perceived by downstream Egypt. (Full article...)
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The Kpong Dam, also known as the Akuse Dam, is a hydroelectric power generating dam on the lower Volta River near Akuse in Ghana. It is owned and operated by Volta River Authority. It was constructed between 1977 and 1982. Its power station has a capacity of 148 megawatts (198,000 hp) with all four units running, though the total nameplate capacity is 160 megawatts (210,000 hp).
The project supplements power production from Akosombo Dam, for the melting of aluminium at VALCO in Tema. The project is located about 24 kilometres (15 mi) downstream of Akosombo Dam, and is about 80 kilometres (50 mi) from the city of Accra.
Because the reservoir upstream of the dam is relatively small, the plant operates as a "run-of-the-river" project, with river flow controlled at Akosombo. The design head of water at the plant is 11.75 metres (38.5 ft); the low head required the use of unusually large turbines for their power rating, with a Francis runner diameter of 8.2 metres (27 ft). The powerhouse is 148 metres (486 ft) long, 40 metres (130 ft) wide and 64 metres (210 ft). The main dam is made of earth with rockfill facing and is 18 metres (59 ft) high and 240 metres (790 ft) long. Dikes on the banks are 2,100 and 3,500 metres (6,900 and 11,500 ft) long. The spillway has a design capacity of 20,000 cubic metres per second (710,000 cu ft/s) and has 15 radial gates, each 11 metres (36 ft) wide by 13.5 metres (44 ft) high, with a total length of 280 metres (920 ft). The civil contractor for the project was Impregilo of Italy. Other components of the project include a 161 kV switchyard and transmission lines, four villages constructed to house people displaced by the project, and road construction.
In addition to power generation, the project provides irrigation water for agriculture, and municipal water supply. Bilharzia is a health hazard in the region which has increased since the construction of the dam. (Full article...)
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The Hassan I Dam is an embankment dam located 19 kilometres (12 mi) northeast of Demnate on the Lakhdar River in Azilal Province, Morocco. Completed in 1986, the dam provides water for the irrigation of over 40,000 hectares (99,000 acres) of farmland. The dam's hydroelectric power plant also generates 132 gigawatt-hours (480 TJ) on average annually. At 145 metres (476 ft) in height, it is the tallest dam in Morocco and the tallest earth-fill dam in Africa. The dam is named after Hassan I of Morocco. (Full article...)
Kato is a fictional character from The Green Hornet franchise. This character has appeared with the Green Hornet in radio, film, television, book and comic book versions. Kato is the Green Hornet's crime-fighting sidekick, and Britt Reid's manservant in civilian life, and has been played by a number of actors. On radio, Kato was initially played by Raymond Hayashi, then Roland Parker who had the role for most of the run, and in the later years Mickey Tolan and Paul Carnegie. Keye Luke took the role in the movie serials, and in the television series, he was portrayed by Bruce Lee. Jay Chou played Kato in the 2011 Green Hornet film. (Full article...)
Bruce Lee's Fighting Method is a book of volumes covering Bruce Lee's martial arts abilities of the Jeet Kune Do movement. The book is available as a single hardcover volume or a series of four paperback volumes. The text describes Bruce Lee's Kung Fufighting techniques, philosophy and training methods. This book was originally written in 1966 by Bruce Lee. However, Lee decided not to publish this work as he feared that instructors would use the fighting knowledge in this text to promote themselves. In 1978, after Bruce Lee's death, his widow Linda Lee Cadwell decided to make available the information on her husband's work. Lee's death changed the perspective of releasing the information that Bruce Lee himself had vacillated about. The book was published with the help of Mitoshi Uyehara. Uyehara was the founder and owner of Black Belt Magazine. During the early years of the publication, Uyehara served as the publisher. Bruce Lee contributed many articles to the publication during the 1960s and a friendship ensued between the two men. Uyehara, a martial artist in his own right, was a key personage in arranging Lee's material for publication. (Full article...)
Bruce Lee, the Man and the Legend (Chinese: 李小龍的生與死, also known as The Legend is Born of Bruce Lee and Year of the Dragon) is a 1973 documentary film directed by Wu Shih, produced by Raymond Chow and Leonard Ho. An American-Hong Kong co-production, it stars Bruce Lee. A follow-up/reworking of this documentary was released in 1984 under the title Bruce Lee: The Legend, directed and produced by Leonard Ho. (Full article...)
Bruce Lee is a platform game written by Ron J. Fortier for Atari 8-bit computers and published in 1984 by Datasoft. The graphics are done by Kelly Day and music is done by John A. Fitzpatrick. The player takes the role of Bruce Lee, while a second player controls either Yamo or alternates with player one for control of Bruce Lee.
The Commodore 64 and Apple II versions were released the same year. The game was converted to the ZX Spectrum and Amstrad CPC and published by U.S. Gold. It was the first U.S. Gold release featuring a famous individual. The MSX version was published in 1985 by Comptiq. (Full article...)
The Legend of Bruce Lee (Chinese: 李小龍傳奇) is a 2008 Chinese biographical television series based on the life story of martial artist and actor Bruce Lee. The 50-episode series was produced and broadcast by CCTV and began airing on October 12, 2008. It was intended to promote Chinese culture alongside the 2008 Beijing Summer Olympics.
It stars Hong Kong actor Danny Chan as Bruce Lee and American actress Michelle Lang as Lee's wife, Linda Lee Cadwell. The production period spanned nine months, with filming taking place in China, Hong Kong, Macau, the United States, Italy, and Thailand, and with a budget of 50 million yuan (US$7.3 million).
Bruce Lee: The Lost Interview is the name given to the 9 December 1971 edition of The Pierre Berton Show, which featured martial artist/actor Bruce Lee in his only English speaking television interview. Its title is derived from its status; it was presumed lost for several years until its rediscovery and airing on 2 November 1994. Over the course of the interview, which was filmed in Hong Kong, Bruce Lee and Pierre Berton discuss Lee's career, various aspects of martial arts philosophy and the inherent problems faced by an Asian in pursuing stardom in Hollywood. A review of the interview by Bill Stockey said that Bruce Lee's "human side is exposed and he is portrayed as more approachable". (Full article...)
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Tao of Jeet Kune Do is a book expressing Bruce Lee's martial artsphilosophy and viewpoints, published posthumously (after Bruce Lee's death in 1973). The project for this book began in 1970 when Bruce Lee suffered a back injury during one of his practice sessions. During this time he could not train in martial arts. He was ordered by his doctors to wear a back brace for 6 months in order to recover from his injury. This was a very tiring and dispiriting time for Lee who was always very physically active.
It was during his convalescence that he decided to compile a treatise on the system or approach to martial arts that he was developing; he called it Jeet Kune Do. The bulk of these writings would become the "core set of writings". Many of these writings were done during a single session which provided natural continuity. Lee had also kept various notes throughout the development of his combat philosophy and these would become the disparate notes used in the book. Many of these notes were "sudden inspirations" which were incomplete and lacked any kind of a construct. The combination of the "core set of writings" and the "disparate notes" would be known as the text Tao of Jeet Kune Do.
In 1971, it was Lee's intent to finish the treatise that he started during his convalescence. However, his film career and work prevented him from doing so. He also vacillated about publishing his book as he felt that this work might be used for the wrong purposes. Lee's intent in writing the book was to record one man's way of thinking about the martial arts. It was to be a guidebook, not a set of instructions or "How to" manual to learn martial arts. (Full article...)
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Chen Zhen (陳真; 陈真; Chén Zhēn; Can4 Zan1) is a fictional character created by Hong Kong writer Ni Kuang. First portrayed by Bruce Lee in the 1972 film Fist of Fury, the character has been the subject of numerous film and television series, including remakes and adaptations of Fist of Fury. Many notable actors, including Jet Li and Donnie Yen, have portrayed Chen Zhen on screen after Bruce Lee. Although Chen Zhen's story varies in the different remakes and adaptations, most have an ending similar to the original Fist of Fury. Chen Zhen is believed to be based on Liu Zhensheng (劉振聲), an apprentice of Huo Yuanjia, a martial artist who lived during the late Qing dynasty of China. (Full article...)
Ip Man (born Ip Kai-man; 1 October 1893 – 2 December 1972), also known as Yip Man, was a Chinese martial arts grandmaster. He became a teacher of the martial art of Wing Chun when he was 20. He had several students who later became martial arts masters in their own right, the most famous among them being Bruce Lee. (Full article...)
Jeet Kune Do (/ˌdʒiːt kuːn ˈdoʊ/; Chinese: 截拳道; Jyutping: zit6 kyun4 dou6; lit. 'stop fist way' or 'way of the intercepting fist'; abbreviated JKD) is a hybrid martial art conceived and practiced by martial artist Bruce Lee that centers the principle of counterattacking an opponent in order to impede their offensive moves. As an eclectic martial art, it relies on a fighting style heavily influenced by Wing Chun, Tai Chi, taekwondo, boxing, fencing and jujutsu. Jeet Kune Do, which Lee intended to have practical applications in life without the traditional routines and metaphysics of conventional martial arts, also incorporates a set of principles to help practitioners make quick decisions and improve their mental and physical health.
Lee, who based Jeet Kune Do upon his experiences in unarmed fighting and self defense, as well as upon his eclectic, Zen Buddhist, Confucianist and Taoist philosophies, did not formally codify JKD before his death. Resultantly, later JKD practitioners had to rely on their own interpretations of Lee's philosophy.
As a hybrid martial arts philosophy drawing from different combat disciplines, Jeet Kune Do is often deemed a predecessor of mixed martial arts (MMA). (Full article...)
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The Dragon Lives (Chinese: 詠春大兄; pinyin: Yǒng Chūn Dà Xiōng; Jyutping: wing6 cheun1 daai6 hing1), also known as He's a Legend, He's a Hero, is a 1976 Hong Kong martial arts film starring Bruce Li and directed by Wang Hsing-lei (credited as Singloy Wang). A fictional account of Bruce Lee's life, it is one of numerous films which exploited the popularity of Lee after his death, a practice called Bruceploitation. The film was released in the United States by Film Ventures International on 19 September 1978.
Chinese Gung Fu: The Philosophical Art of Self-Defense was published in early 1963 by Bruce Lee with the help of friend and fellow martial artist James Yimm Lee of Oakland, California. James had previously published books on the martial arts such as Modern Gung Fu, Karate: Iron, Poison Hand Training and Karate Oriental Self-Defense in 1957. In the book Remembering the Master: Bruce Lee, James Yimm Lee and the Creation of Jeet Kune Do by Sid Campbell and Greglon Yimm Lee (James Lee's son) it is stated the initial run was 1,500 copies. The book was sold through James Lee's company Oriental Book Sales at a price of $5. In addition to the book, a companion Chinese Gung Fu instruction chart was available for $1.
Following Bruce Lee's death, his estate commissioned writer John Little to edit and publish some of Lee's writings. Little included the content of Chinese Gung Fu: The Philosophical Art of Self-Defense as well as additional 1964 writings by Bruce Lee in the book Bruce Lee, The Tao of Gung Fu: Commentaries on the Chinese Martial Arts. (Full article...)
The player controls Thomas, a kung fu master, as he fights his way through the five levels of the Devil's Temple to rescue his girlfriend Sylvia from the crime boss Mr. X. As he ascends the tower, he has to fight many enemies along the way and five end-of-level boss battles, a concept inspired by Game of Death. Thomas and each boss have a health meter, and the game temporarily becomes a one-on-one fighting game during boss battles.
The game was a major commercial success, topping the Japanese arcade charts and becoming America's second highest-grossing arcade game of 1985, while receiving critical acclaim for its fast-paced, side-scrolling gameplay and detailed, colorful graphics. A port for the Nintendo Entertainment System (known as the Famicom in Japan) was developed by Nintendo under the direction of Shigeru Miyamoto, released as Spartan X in Japan and Kung Fu in the West, selling 3.5 million copies worldwide. It was also one of the top five best-selling Commodore 64 games of 1986. It spawned the sequel Spartan X 2 (1991) and the spiritual successors Trojan (1986) and Vigilante (1988). (Full article...)
Dragon: The Bruce Lee Story is a 1993 American biographicaldrama film directed by Rob Cohen. The film stars Jason Scott Lee, with a supporting cast including Lauren Holly, Nancy Kwan, and Robert Wagner. The film follows the life of actor and martial artist Bruce Lee (Jason) from his relocation to the United States from Hong Kong to his career as a martial arts teacher, and then as a television and film actor. It also focuses on the relationship between Bruce and his wife Linda, and the racism to which Bruce was subjected.
The primary source of the screenplay is Cadwell's 1975 biography Bruce Lee: The Man Only I Knew. Other sources include Robert Clouse's book Bruce Lee: The Biography and research by Cohen, including interviews with Cadwell and Bruce's son, Brandon Lee. Rather than a traditional biographical film, Cohen decided to include elements of mysticism and to dramatise fight scenes to give it the same tone as the films in which Bruce starred. Dragon was filmed primarily in Hong Kong, Los Angeles and San Francisco.
Dragon: The Bruce Lee Story received generally positive reviews, with critics finding it entertaining despite criticisms of its veneration of Bruce. Jason was widely praised for his performance. The film was a commercial success and its revenue exceeded box office averages for biographical films, which was attributed to its romantic themes and its appeal to people outside the traditional kung fu film audience. A video game adaptation of the same name was released the following year. Dragon is dedicated to Brandon, who died several weeks before its release. (Full article...)
Bruce Lee's Fighting Method is a book of volumes covering Bruce Lee's martial arts abilities of the Jeet Kune Do movement. The book is available as a single hardcover volume or a series of four paperback volumes. The text describes Bruce Lee's Kung Fufighting techniques, philosophy and training methods. This book was originally written in 1966 by Bruce Lee. However, Lee decided not to publish this work as he feared that instructors would use the fighting knowledge in this text to promote themselves. In 1978, after Bruce Lee's death, his widow Linda Lee Cadwell decided to make available the information on her husband's work. Lee's death changed the perspective of releasing the information that Bruce Lee himself had vacillated about. The book was published with the help of Mitoshi Uyehara. Uyehara was the founder and owner of Black Belt Magazine. During the early years of the publication, Uyehara served as the publisher. Bruce Lee contributed many articles to the publication during the 1960s and a friendship ensued between the two men. Uyehara, a martial artist in his own right, was a key personage in arranging Lee's material for publication. (Full article...)
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41 Cumberland Road in 2008, operating at that time as a love hotel. 41 Cumberland Road is the address of Bruce Lee's former home in Kowloon Tong, Kowloon, Hong Kong, where he spent his last year with his family. The place was affectionately known as "the Crane's Nest".
Master Diver swims through a passage in a shipwreck Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The word scuba is an acronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent submitted in 1952. Scuba divers carry their own source of breathing gas, affording them greater independence and movement than surface-supplied divers, and more time underwater than freedivers. Although the use of compressed air is common, other gas blends are also used.
Open-circuit scuba systems discharge the breathing gas into the environment as it is exhaled and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver at ambient pressure through a diving regulator. They may include additional cylinders for range extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open-circuit, making longer dives feasible. Rebreathers extend the time spent underwater compared to open-circuit for the same metabolic gas consumption. They produce fewer bubbles and less noise than open-circuit scuba, which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference.
Scuba diving may be done recreationally or professionally in a number of applications, including scientific, military and public safety roles, but most commercial diving uses surface-supplied diving equipment for breathing gas security when this is practicable. Scuba divers engaged in armed forces covert operations may be referred to as frogmen, combat divers or attack swimmers.
Master Diver swims through a passage in a shipwreck Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The word scuba is an acronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent submitted in 1952. Scuba divers carry their own source of breathing gas, affording them greater independence and movement than surface-supplied divers, and more time underwater than freedivers. Although the use of compressed air is common, other gas blends are also used.
Open-circuit scuba systems discharge the breathing gas into the environment as it is exhaled and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver at ambient pressure through a diving regulator. They may include additional cylinders for range extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open-circuit, making longer dives feasible. Rebreathers extend the time spent underwater compared to open-circuit for the same metabolic gas consumption. They produce fewer bubbles and less noise than open-circuit scuba, which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference.
Scuba diving may be done recreationally or professionally in a number of applications, including scientific, military and public safety roles, but most commercial diving uses surface-supplied diving equipment for breathing gas security when this is practicable. Scuba divers engaged in armed forces covert operations may be referred to as frogmen, combat divers or attack swimmers.
A freediver on the ocean floor Freediving, free-diving, free diving, breath-hold diving, or skin diving, is a mode of underwater diving that relies on breath-holding until resurfacing rather than the use of breathing apparatus such as scuba gear.
Besides the limits of breath-hold, immersion in water and exposure to high ambient pressure also have physiological effects that limit the depths and duration possible in freediving.
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
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Surface-supplied divers riding a stage to the underwater workplace
Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several possible meanings, depending on context. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well-adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done.
In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold (freediving) or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives. Atmospheric diving suits (ADS) may be used to isolate the diver from high ambient pressure. Crewed submersibles can extend depth range to full ocean depth, and remotely controlled or robotic machines can reduce risk to humans.
The environment exposes the diver to a wide range of hazards, and though the risks are largely controlled by appropriate diving skills, training, types of equipment and breathing gases used depending on the mode, depth and purpose of diving, it remains a relatively dangerous activity. Professional diving is usually regulated by occupational health and safety legislation, while recreational diving may be entirely unregulated. Diving activities are restricted to maximum depths of about 40 metres (130 ft) for recreational scuba diving, 530 metres (1,740 ft) for commercial saturation diving, and 610 metres (2,000 ft) wearing atmospheric suits. Diving is also restricted to conditions which are not excessively hazardous, though the level of risk acceptable can vary, and fatal incidents may occur.
Recreational diving (sometimes called sport diving or subaquatics) is a popular leisure activity. Technical diving is a form of recreational diving under more challenging conditions. Professional diving (commercial diving, diving for research purposes, or for financial gain) involves working underwater. Public safety diving is the underwater work done by law enforcement, fire rescue, and underwater search and recovery dive teams. Military diving includes combat diving, clearance diving and ships husbandry. Deep sea diving is underwater diving, usually with surface-supplied equipment, and often refers to the use of standard diving dress with the traditional copper helmet. Hard hat diving is any form of diving with a helmet, including the standard copper helmet, and other forms of free-flow and lightweight demand helmets. The history of breath-hold diving goes back at least to classical times, and there is evidence of prehistoric hunting and gathering of seafoods that may have involved underwater swimming. Technical advances allowing the provision of breathing gas to a diver underwater at ambient pressure are recent, and self-contained breathing systems developed at an accelerated rate following the Second World War. (Full article...)
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Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
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Surface-supplied divers riding a stage to the underwater workplace
Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several possible meanings, depending on context. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well-adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done.
In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold (freediving) or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives. Atmospheric diving suits (ADS) may be used to isolate the diver from high ambient pressure. Crewed submersibles can extend depth range to full ocean depth, and remotely controlled or robotic machines can reduce risk to humans.
The environment exposes the diver to a wide range of hazards, and though the risks are largely controlled by appropriate diving skills, training, types of equipment and breathing gases used depending on the mode, depth and purpose of diving, it remains a relatively dangerous activity. Professional diving is usually regulated by occupational health and safety legislation, while recreational diving may be entirely unregulated. Diving activities are restricted to maximum depths of about 40 metres (130 ft) for recreational scuba diving, 530 metres (1,740 ft) for commercial saturation diving, and 610 metres (2,000 ft) wearing atmospheric suits. Diving is also restricted to conditions which are not excessively hazardous, though the level of risk acceptable can vary, and fatal incidents may occur.
Recreational diving (sometimes called sport diving or subaquatics) is a popular leisure activity. Technical diving is a form of recreational diving under more challenging conditions. Professional diving (commercial diving, diving for research purposes, or for financial gain) involves working underwater. Public safety diving is the underwater work done by law enforcement, fire rescue, and underwater search and recovery dive teams. Military diving includes combat diving, clearance diving and ships husbandry. Deep sea diving is underwater diving, usually with surface-supplied equipment, and often refers to the use of standard diving dress with the traditional copper helmet. Hard hat diving is any form of diving with a helmet, including the standard copper helmet, and other forms of free-flow and lightweight demand helmets. The history of breath-hold diving goes back at least to classical times, and there is evidence of prehistoric hunting and gathering of seafoods that may have involved underwater swimming. Technical advances allowing the provision of breathing gas to a diver underwater at ambient pressure are recent, and self-contained breathing systems developed at an accelerated rate following the Second World War. (Full article...)
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Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
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2nd Reconnaissance Battalion combat diver training with the Dräger LAR V rebreather
Rebreather diving is underwater diving using diving rebreathers, a class of underwater breathing apparatus which recirculate the breathing gas exhaled by the diver after replacing the oxygen used and removing the carbon dioxide metabolic product. Rebreather diving is practiced by recreational, military and scientific divers in applications where it has advantages over open circuit scuba, and surface supply of breathing gas is impracticable. The main advantages of rebreather diving are extended gas endurance, low noise levels, and lack of bubbles.
Rebreathers are generally used for scuba applications, but are also occasionally used for bailout systems for surface-supplied diving. Gas reclaim systems used for deep heliox diving use similar technology to rebreathers, as do saturation divinglife-support systems, but in these applications the gas recycling equipment is not carried by the diver. Atmospheric diving suits also carry rebreather technology to recycle breathing gas as part of the life-support system, but this article covers the procedures of ambient pressure diving using rebreathers carried by the diver.
Rebreathers are generally more complex to use than open circuit scuba, and have more potential points of failure, so acceptably safe use requires a greater level of skill, attention and situational awareness, which is usually derived from understanding the systems, diligent maintenance and overlearning the practical skills of operation and fault recovery. Fault tolerant design can make a rebreather less likely to fail in a way that immediately endangers the user, and reduces the task loading on the diver which in turn may lower the risk of operator error. (Full article...)
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Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
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Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
Image 12
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
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Atmospheric diving suit
An atmospheric diving suit (ADS), or single atmosphere diving suit is a small one-person articulated submersible which resembles a suit of armour, with elaborate pressure joints to allow articulation while maintaining an internal pressure of one atmosphere. An ADS can enable diving at depths of up to 2,300 feet (700 m) for many hours by eliminating the majority of significant physiological dangers associated with deep diving. The occupant of an ADS does not need to decompress, and there is no need for special breathing gas mixtures, so there is little danger of decompression sickness or nitrogen narcosis when the ADS is functioning properly. An ADS can permit less skilled swimmers to complete deep dives, albeit at the expense of dexterity.
Atmospheric diving suits in current use include the Newtsuit, Exosuit, Hardsuit and the WASP, all of which are self-contained hard suits that incorporate propulsion units. The Hardsuit is constructed from cast aluminum (forged aluminum in a version constructed for the US Navy for submarine rescue); the upper hull is made from cast aluminum, while the bottom dome is machined aluminum. The WASP is of glass-reinforced plastic (GRP) body tube construction. (Full article...)
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
Image 2
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
Image 3
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
Image 4
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
Image 5
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
Image 6
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. It is also nearly impossible for the diver to get lost. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work.
Air-line, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)
Image 7
A freediver on the ocean floor Freediving, free-diving, free diving, breath-hold diving, or skin diving, is a mode of underwater diving that relies on breath-holding until resurfacing rather than the use of breathing apparatus such as scuba gear.
Besides the limits of breath-hold, immersion in water and exposure to high ambient pressure also have physiological effects that limit the depths and duration possible in freediving.
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