Huang predicted numerous negative consequences should the Three Gorges Dam be built, including the collapse of downstream banks, silting problems, frequent earthquakes, the spread of a disease called schistosomiasis, which is caused by parasitic flatworms, decrease in water quality, upstream flooding, and voyage issues. But the integrity of the Three Gorges Dam remains under fire, as officials say despite draining efforts, constant rain may still see it collapse. [43], Funding sources include the Three Gorges Dam Construction Fund, profits from the Gezhouba Dam, loans from the China Development Bank, loans from domestic and foreign commercial banks, corporate bonds, and revenue from both before and after the dam is fully operational. A similar separation is used on the downstream side, seen partially in the preceding image. if (d.getElementById(id)) return; Torrential rains have been causing havoc throughout the southwest and central region this month, with many rivers bursting their banks, prompting mass evacuations. It also improves shipping conditions. TRENDING: Photo Appears to Show Black Lives Matter Supporters Holding Down and Kneeling on Neck of White Baby. Since the filling of the reservoir in 2003, the Three Gorges Dam has supplied an extra 11 km3 (2.6 cu mi) of fresh water to downstream cities and farms during the dry season. [78], Power is distributed over multiple 500 kV transmission lines. The company noted that parts of the dam had “deformed slightly,” displacing some external structures, and seepage into the main outlet walls had also been reported throughout the 18 hours on Saturday and Sunday when water was discharged though its outlets. Satellite image via NASA shows water moving through the Three Gorges Dam in mid-June. [12][13] Coupling the dam's 32 main turbines with two smaller generators (50 MW each) to power the plant itself, the total electric generating capacity of the dam is 22,500 MW. Average efficiency is over 94%, and reaches 96.5%. [32][33] Construction started on December 14, 1994. [19] However, the dam flooded archaeological and cultural sites, displaced some 1.3 million people, and had caused significant ecological changes including an increased risk of landslides. ", "NASA Details Earthquake Effects on the Earth", "39.1931, 1935, 1954, 1998 年长江流域发生的4次大洪水造成了怎样的洪水灾害?? China's controversial Three Gorges Dam, the world's biggest hydropower project, is structurally sound, officials said, denying rumours on social media it was at risk of collapse. That is a significant change from the 13,000 km2 (5,000 sq mi) net loss of forest each year in the 1990s. The DC transmission line HVDC Three Gorges – Guangdong to the South China Grid has a capacity of 3,000 MW. China finally admits Its Three Gorges Dam has ‘deformed slightly’ but claims it happened over the weekend, ignoring reports this happened long ago. window.fbAsyncInit = function() { The dam limited the water flow to less than 40,000 cubic metres (1,400,000 cu ft) per second, raising the upstream water level from 145.13 m (476.1 ft) on August 1, 2009, to 152.88 m (501.6 ft) on August 8, 2009. [98] The dam contributed to the functional extinction of the baiji Yangtze river dolphin. The problem is that China once claimed the dam would withstand a 10,000 year flood, then a 1,000 year flood and now only a 100 year flood. js.src = "https://connect.facebook.net/en_US/sdk.js"; The water also powers the Gezhouba Dam downstream. The region also provides habitats to hundreds of freshwater and terrestrial animal species. Two short rail lines, one on each side of the river, are to be constructed. The Three Gorges Dam. The project used 27.2 million m3 (35.6 million cu yd) of concrete (mainly for the dam wall), used 463,000 tonnes of steel (enough to build 63 Eiffel Towers), and moved about 102.6 million m3 (134.2 million cu yd) of earth. [97] The Chinese paddlefish is also believed extinct in part due to the dam blocking its migration. As a result, damage to an individual section should not affect other parts of the dam. Of the 3,000 to 4,000 remaining critically endangered Siberian crane, a large number currently spend the winter in wetlands that will be destroyed by the Three Gorges Dam. [138], The 600 km (370 mi) long reservoir flooded some 1,300 archaeological sites and altered the appearance of the Three Gorges as the water level rose over 91 m (300 ft). ", "Three Gorges Dam will meet the first large-scale flood since being completed", "China's west seeks to impress investors", "Three Gorges Dam Ship Lift, People's Republic of China", "Tower columns for Three Gorges shiplift to be built", "Three Gorges Dam exceeds cargo target set for 2030", "China shifts from follower to leader in hydropower development", "Ship lift at Three Gorges Dam, China − design of steel structures", "Phase I Field Trial of Ship Lift at Three Gorges Dam Successfully Ends", "World's largest shiplift starts operation at China's Three Gorges Dam", "Millions more face relocation from Three Gorges Reservoir Area", "China warns of environmental "catastrophe" from Three Gorges Dam", "Relocation for Giant Dam Inflames Chinese Peasants", "Flotsam, Jetsam and the Three Gorges Dam", "Annual report on the military power of the People's Republic of China (.pdf)", "Just Two Missiles could blow up China's Three Gorges Dam and kill millions", "中国三峡总公司拟在金沙江上建4座梯级水电站 总装机容量为3850万千瓦_中国电力网新闻中心", "Beijing Environment, Science and Technology Update", "The Three Gorges Dam v/s The Itaipu Dam", https://en.wikipedia.org/w/index.php?title=Three_Gorges_Dam&oldid=1000451196#Structural_integrity, Creative Commons Attribution-ShareAlike License. [118][119] The gates are the vulnerable hinged type, which, if damaged, could temporarily render the entire flight unusable. [71] During an August 2009 flood, the plant first reached its maximum output for a short period. The technology transfer agreement was signed together with the contract. Many other fish are injured in the turbine blades of the hydroelectric plants as well. Maximum vessel size is 10,000 tons. [15][31][35] The ship lift was completed in 2015. The 88-kilometre (55 mi) long northern portage railway (北岸翻坝铁路) will run from the Taipingxi port facility (太平溪港) on the northern side of the Yangtze, just upstream from the dam, via Yichang East Railway Station to the Baiyang Tianjiahe port facility in Baiyang Town (白洋镇), below Yichang. However, two weeks ago we reported China’s massive Three Gorges Dam is at risk of blowing, putting 400 million people at risk. [37] It has a combined generating capacity of 22.5 gigawatts and a designed annual generation capacity of 88.2 billion kilowatt hours. If it's true, it would be a catastrophe beyond comprehension. [84] One is that sedimentation projections are not agreed upon, and the other is that the dam sits on a seismic fault. An important function of the dam is to control flooding, which is a major problem for the seasonal river of the Yangtze. [citation needed].

// Load the SDK asynchronously fjs.parentNode.insertBefore(js, fjs); Beijing has admitted in a rare revelation that ts 2.4-kilometer Three Gorges Dam spanning the Yangtze River in Hubei province “deformed slightly”, with some nonstructural, peripheral parts of the dam had buckled, after record flooding. After the 1949 Communist Revolution, Mao Zedong supported the project, but began the Gezhouba Dam project nearby first, and economic problems including the Great Leap Forward and the Cultural Revolution slowed progress. [31], During the 1980s, the idea of a dam reemerged. The actual power output in 2008 was obtained based on the monthly electricity sent to the grid. Due to extensive monsoon of 2020 year with heavy rainfalls, the annual production reached ~112 TWh that year, which broke the previous world record of annual production by Itaipu Dam equal to ~103 TWh of 2016 year. 22 began operation on June 11, 2007, and No. This capacity will reduce the frequency of major downstream flooding from once every 10 years to once every 100 years. [82] Th photo, taken on August 17, 2020, shows water gushing out from the Three Gorges Dam in southwest China's Chongqing province. [99], In 2005, NASA scientists calculated that the shift of water mass stored by the dams would increase the total length of the Earth's day by 0.06 microseconds and make the Earth slightly more round in the middle and flat on the poles.[100]. Full cost recovery was thus expected to occur ten years after the dam started full operation,[41] but the full cost of the Three Gorges Dam was recovered by December 20, 2013. The total capacity of those four dams is 38,500 MW,[148] almost double the capacity of the Three Gorges. [109][110], The installation of ship locks is intended to increase river shipping from ten million to 100 million tonnes annually; as a result transportation costs will be cut between 30 and 37%. version : "" (function(d, s, id) { From 2004 to 2007, a total of 198 million tonnes of freight passed through the locks. [44], Power generation is managed by China Yangtze Power, a listed subsidiary of China Three Gorges Corporation (CTGC)—a Central Enterprise SOE administered by SASAC. A full 4.27 km3 (1.02 cu mi) of flood water was captured and the river flow was cut by as much as 15,000 m3 (530,000 cu ft) per second.[72]. [127], Though the large size of the reservoir caused huge relocation upstream, it was considered justified by the flood protection it provides for communities downstream. [116] One complicating factor is that the water level can vary dramatically. Some hydrologists expect downstream riverbanks to become more vulnerable to flooding. ", In order to maximize the utility of the Three Gorges Dam and cut down on sedimentation from the Jinsha River, the upper course of the Yangtze River, authorities plan to build a series of dams on the Jinsha, including Wudongde Dam, Baihetan Dam, along with the now completed Xiluodu and Xiangjiaba dams. It is conjectured that this could have extreme cascading effects, involving 16 nuclear power plants downstream. [72], During the November to May dry season, power output is limited by the river's flow rate, as seen in the diagrams on the right. The deformation occurred last Saturday when the flood from western provinces including Sichuan and Chongqing along the upper reaches of the Yangtze River peaked at a record-setting 61,000 cubic meters per second, according to China Three Gorges Corporation, a state-owned enterprise that manages the dam and the sprawling power plant underneath it. [108], During the 2010 South China floods in July, inflows at the Three Gorges Dam reached a peak of 70,000 m3/s (2,500,000 cu ft/s), exceeding the peak during the 1998 Yangtze River Floods. "[142], The Three Gorges Dam is a steel-concrete gravity dam. Full power (9,800 MW) was only reached on October 18, 2006, after the water level reached 156 m.[49], The 12 south side main generators are also in operation. When the water level is at its maximum of 175 m (574 ft) above sea level, 110 m (361 ft) higher than the river level downstream, the dam reservoir is on average about 660 km (410 mi) in length and 1.12 km (3,675 ft) in width. Be a catastrophe beyond comprehension last month the mysterious, exiled Chinese billionaire and whistleblower Guo... 94 ] freshwater fish are especially affected by dams due to changes in the.... Control floods [ 117 ] an article in Steel construction says the power... 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