3 gorges dam collapse

By the time night fell on Aug. 8, as many as 65 area dams had collapsed. The absence of silt downstream has three effects: Erosion in the reservoir, induced by rising water, causes frequent major landslides that have led to noticeable disturbance in the reservoir surface, including two incidents in May 2009 when somewhere between 20,000 and 50,000 cubic metres (26,000 and 65,000 cu yd) of material plunged into the flooded Wuxia Gorge of the Wu River. The original plans called for the dam to employ a unique method for moving ships: the ships would enter locks located at the lower and upper ends of the dam and then cranes would move the ships from one lock to the next. The greater the head, the less water needed to reach full power. [134][135][136] [117] An article in Steel Construction says the actual time of the lift will be 21 minutes. [28] In 1932, the Nationalist government, led by Chiang Kai-shek, began preliminary work on plans in the Three Gorges. But not just to China. [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. The ship lift must work even if water levels vary by 12 meters (39 ft) on the lower side, and 30 m (98 ft) on the upper side. The designed hydraulic head of the generator is 80.6 meters (264 ft). appId : "", Cheng says that the flood has already raised the water dammed behind the Three Gorges to 50 — fifty — feet higher than the maximum flood level. The Three Gorges dam is discharging flood. TRENDING: Photo Appears to Show Black Lives Matter Supporters Holding Down and Kneeling on Neck of White Baby. [30] Some exploration, survey, economic study, and design work was done, but the government, in the midst of the Chinese Civil War, halted work in 1947. That is a significant change from the 13,000 km2 (5,000 sq mi) net loss of forest each year in the 1990s. [96] Other aquatic species have been endangered by the dam, particularly the baiji, or Chinese river dolphin,[85] now extinct. 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. Last week we reported China’s massive Three Gorges Dam is at risk of blowing, putting 400 million people at risk. Made of concrete and steel, the dam is 2,335 m (7,661 ft) long and the top of the dam is 185 m (607 ft) above sea level. The official Xinhua News Agency quoted the operator of the the world’s largest hydroelectric gravity dam as saying that some nonstructural, peripheral parts of the dam had buckled. This is a well thought out, clearly explained. [29] Some 54 Chinese engineers went to the U.S. for training. The DC transmission line HVDC Three Gorges – Guangdong to the South China Grid has a capacity of 3,000 MW. According to the Changjiang Ministry of Water Resources, both the Gezhou Dam and the Three Gorges Dam stopped 30 billion cubic meters of floodwater during the last 30-days. The Asian Times reported yesterday: In a rare revelation, Beijing has admitted that its 2.4-kilometer Three Gorges Dam spanning the Yangtze River in Hubei province “ deformed slightly ” after record flooding. [80][81], According to the National Development and Reform Commission, 366 grams of coal would produce 1 kWh of electricity during 2006. The moving mass (including counterweights) is 34,000 tonnes. Torrential rains have been causing havoc throughout the southwest and central region this month, with many rivers bursting their banks, prompting mass evacuations. [citation needed]. Facebook Twitter Reddit Email RSS Feed Newsletter Donate. The electricity generated is then stepped-up to 500 kV for transmission at 50 Hz. [139] Cultural and historical relics are being moved to higher ground as they are discovered, but the flooding inevitably covered undiscovered relics. Shanghai Daily reported that the first operational use of the lift was on September 18, 2016, when limited "operational testing" of the lift began. [104] Also, the dam cannot protect against some of the large tributaries downstream, including the Xiang, Zishui, Yuanshui, Lishui, Hanshui, and the Gan. 1/ Completed over twenty-one years (1994-2015) out of more than 28 million cubic meters of concrete and 463,000 tons of steel, the 185 meter tall Three Gorges Dam is today the largest hydroelectric dam on earth. In 1944, the United States Bureau of Reclamation's head design engineer, John L. Savage, surveyed the area and drew up a dam proposal for the 'Yangtze River Project'. [90], In 1997, the Three Gorges area had 10% forestation, down from 20% in the 1950s. The Chinese government has moved to defend the structural integrity of the massive Three Gorges Dam, as a hydrology expert took to international media over the weekend to warn it could collapse … FB.init({ THREE GORGES DAM COLLAPSE - FAILED DAMS UPSTREAM OF 3GD. js = d.createElement(s); js.id = id; China regards the project as a monumental social and economical success,[17] with the design of state-of-the-art large turbines,[18] and a move toward limiting greenhouse gas emissions. The NTD link in the OP claims that the Three Gorges Dam is not properly anchored to the bedrock, and satellite photos show that portions of the dam appear to have moved in response to water pressure. [12][14][15] The last major component of the project, the ship lift, was completed in December 2015. The trials of elevator finished in July 2016, the first cargo ship was lifted on July 15, the lift time comprised 8 minutes. No. The Three Gorges Dam built on the river Yangtze River has been deemed a a environmentally hazardous project right from its beginning given its geographical position and its effect on earth plates. Shopping. [140], The United States Department of Defense reported that in Taiwan, "proponents of strikes against the mainland apparently hope that merely presenting credible threats to China's urban population or high-value targets, such as the Three Gorges Dam, will deter Chinese military coercion. A sudden collapse of the dam could release a wall of water over a hundred feet high with 400 million people living in the valley downstream. [121] It was tested in December 2015 and announced complete in January 2016. Source link. 17) began operation on December 18, 2007, raising capacity to 14.1 GW, finally surpassing Itaipu dam (14.0 GW), to become the world's largest hydro power plant by capacity. if (d.getElementById(id)) return; Watch later. 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. However, electricity demand has increased more quickly than previously projected. The Three Gorges Dam is the world's largest capacity hydroelectric power station with 34 generators: 32 main generators, each with a capacity of 700 MW, and two plant power generators, each with capacity of 50 MW, making a total capacity of 22,500 MW. [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%. [22][23][24][25], A large dam across the Yangtze River was originally envisioned by Sun Yat-sen in The International Development of China, in 1919. [73][74], The Three Gorges Dam reached its design-maximum reservoir water level of 175 m (574 ft) for the first time on October 26, 2010, in which the intended annual power-generation capacity of 84.7 TWh was realized. In addition, populations of the Yangtze sturgeon are guaranteed to be "negatively affected" by the dam. As many as 400 million lives may be at risk as torrential rain in China threatens the world’s largest dam. [137], Allegedly, funds for relocating 13,000 farmers around Gaoyang disappeared after being sent to the local government, leaving residents without compensation. The total capacity of the ship locks is expected to reach 100 million tonnes per year.[83]. 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. It is home to 6,388 species of plants, which belong to 238 families and 1,508 genera. Three Gorges uses Francis turbines. The reservoir's flood storage capacity is 22 cubic kilometres (5.3 cu mi; 18,000,000 acre⋅ft). A flood alert has been raised near Three Gorges Dam in China-- the largest hydropower project in the world-- as the country grapples with its worst flooding in 70 years. [98] The dam contributed to the functional extinction of the baiji Yangtze river dolphin. [16], As well as producing electricity, the dam is intended to increase the Yangtze River's shipping capacity. A short video vividly demonstrating what will after the Three Gorges Dam breaks has been circulated like mad on Chinese social media. The flood affected more than 2.3 million people, killing 1,526. 4 Jan 11:25. [82] The water level upstream drops from 175 to 145 m (574 to 476 ft),[107] preparing for the rainy season. The alternating current (AC) lines to the Central China Grid have a total capacity of 12,000 MW. Then in 2018 it was reported online that pictures show that the Three Gorges Dam has moved: An expert on the region’s food supply, Geoff Quartermaine Bastin, provided this analysis regarding the impact on the world’s food supply should the massive dam break: The collapse of the TGD would destroy all the cropland and livestock downstream, destroy major cities such as Wuhan and could threaten Shanghai. The generator produces electrical power at 20 kV. var js, fjs = d.getElementsByTagName(s)[0]; That is not counting the economic losses that China can suffer. Yichang City, Hubei Province, China, July 2. [45], The main generators weigh about 6,000 tonnes each and are designed to produce more than 700 MW of power. Before the dam was constructed, the maximum freight capacity at the Three Gorges site was 18.0 million tonnes per year. Despite the Three Gorges dam's growing list of problems, however, hydropower remains an integral—and ostensibly green—component of China's energy mix. Now, China's own renowned hydrologist Wang Weiluo has questioned the safety of the massive Dam and has warned that it could collapse at any moment. This is largely due to China's large reforestation effort. The technology transfer agreement was signed together with the contract. In November 2007, it was reported in the local media that construction of the ship lift started in October 2007. [8], The State Grid Corporation and China Southern Power Grid paid a flat rate of ¥250 per MWh (US$35.7) until July 2, 2008. Watch later. [103] The 1954 flood carried 50 cubic kilometres (12 cu mi) of water. 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. Rated power is 778 MVA, with a maximum of 840 MVA and a power factor of 0.9. Foremost among them was hydrologist Huang Wangli, who was a target of the CCP (Chinese Communist Party) because of his unwillingness to align with Party policies. In 1998, a flood in the same area caused billions of dollars in damage; 2,039 km2 (787 sq mi) of farmland were flooded. In 1958, after the Hundred Flowers Campaign, some engineers who spoke out against the project were imprisoned. 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. The collapse of the TGD would perhaps be the single largest disaster that could affect the world’s food security because aside from the immediate disaster there would be enormous upward pressure on food prices, putting essential staples out of reach of hundreds of millions of people outside China. (function(d, s, id) { [8][9], The dam body was completed in 2006. [36], In February 2012, Xinhua reported that the four towers that are to support the ship lift had almost been completed.[120]. The outer diameter of the generator stator is 21.4/20.9 m. The inner diameter is 18.5/18.8 m. The stator, the biggest of its kind, is 3.1/3 m in height. In addition to the canal locks, there is a ship lift, a kind of elevator for vessels. The Three Gorges Dam is rapidly failing. [42] It was estimated in 2009 that the construction cost would be recovered when the dam had generated 1,000 terawatt-hours (3,600 PJ) of electricity, yielding 250 billion yuan. The ship lift's design uses a helical gear system, to climb or descend a toothed rack. As of May 2014, the ship lift was expected to be completed by July 2015. The ship lift takes 30 to 40 minutes to transit, as opposed to the three to four hours for stepping through the locks. Bearing load is 5050/5500 tonnes. The water is held back by the innate mass of the individual dam sections. Some newer ones are air-cooled, which are simpler in design and manufacture and are easier to maintain. The dam is expected to minimize the effect of even a "super" flood. After the 1954 Yangtze River Floods, in 1956, Mao Zedong authored "Swimming", a poem about his fascination with a dam on the Yangtze River. ", 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. People's Liberation Army General Liu Yuan was quoted in the China Youth Daily saying that the People's Republic of China would be "seriously on guard against threats from Taiwan independence terrorists. The Three Gorges Dam must open its reservoir due to the third heavy rain in the upper reaches of Yangtze River, while China’s been warning that the worst flood is still ahead. [89] Also, in the first four months of 2010, there were 97 significant landslides. Immediately after the first filling of the reservoir, around 80 hairline cracks were observed in the dam's structure,[144][145][146] however an experts group gave the project overall a good quality rating[147] and the 163,000 concrete units all passed quality testing, with normal "deformation" within design limits. [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). "Anybody Can Put on a MAGA Hat" - FL Teacher Fired for Telling Students Antifa Was Involved in DC Riots -, Washington State Democrats Propose Legislation to Ensure They Win All Future Elections and Prevent Any Public Disclosure of Fraud Embedded in the Process, Conservative woman takes Yahoo reporter APART for trashing Ben Shapiro over … zip ties – twitchy.com, “Anybody Can Put on a MAGA Hat” – FL Teacher Fired for Telling Students Antifa Was Involved in DC Riots –, Opinion: Masters of the Universe Tell Stalin to, “Hold My Beer.”, No, I don’t want Liz Cheney kicked out of leadership for voting to impeach Trump, Prosecutors Want Rittenhouse’s Bond Agreement Radically Changed After Teen Made ‘OK’ Hand Sign. Two short rail lines, one on each side of the river, are to be constructed. [16][36] The dam had raised the water level in the reservoir to 172.5 m (566 ft) above sea level by the end of 2008 and the designed maximum level of 175 m (574 ft) by October 2010.[37][38]. [20][21] Because of that, the dam has been controversial both domestically and abroad. As a result, damage to an individual section should not affect other parts of the dam. Shipping will become safer, since the gorges are notoriously dangerous to navigate. From 2003 to 2007, power production equaled that of 84 million tonnes of standard coal. An important function of the dam is to control flooding, which is a major problem for the seasonal river of the Yangtze. Up Next. js.src = "https://connect.facebook.net/en_US/sdk.js"; Three direct current (DC) lines to the East China Grid carry 7,200 MW: Three Gorges – Shanghai (3,000 MW), HVDC Three Gorges – Changzhou (3,000 MW), and HVDC Gezhouba – Shanghai (1,200 MW). It’s well worth watching because when the dam goes, besides the tragic consequences for the Chinese people it will have serious economic and political effects throughout the world. And that if it fails, it would kill millions of people, perhaps 100 million according to some claims, and displace even more. Tap to … Share. [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. [85] Because the flow is slower above the dam, much of this sediment will now settle there instead of flowing downstream, and there will be less sediment downstream. Many other fish are injured in the turbine blades of the hydroelectric plants as well. JOIN OVER 35,000+ PATRIOTS IN RECEIVING REAL, ACCURATE, AND AMERICAN-CENTRIC NEWS! According to the Ministry of Environmental Protection, as of April 2007, more than 50 new plants could treat 1.84 million tonnes per day, 65% of the total need. [149] Baihetan is under construction and Wudongde is seeking government approval. 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. The provinces of Hunan, Henan and Hubei, where the Three Gorges dam is located, were also braced for heavy rain on Thursday. [75] Between 2010 (first design-maximum reservoir water level) and 2019, the dam generated an average of 92 TWh of electricity per year, just second to Itaipu dam average of 92.8 TWh of electricity per year during the same period. The official Xinhua News Agency quoted the operator of the the world’s largest hydroelectric gravity dam as saying that some nonstructural, peripheral parts of the dam had buckled. [48], The first north side main generator (No. September 7, 2020 by IWB. Copy link. [46][47], The generators were manufactured by two joint ventures: one of them Alstom, ABB Group, Kvaerner, and the Chinese company Harbin Motor; the other Voith, General Electric, Siemens (abbreviated as VGS), and the Chinese company Oriental Motor. The Three Gorges Dam. fjs.parentNode.insertBefore(js, fjs); However, the municipal government explained that the relocation is due to urbanization, rather than the dam, and people involved included other areas of the municipality. [91] Over one billion tons of wastewater are released annually into the river,[85] which was more likely to be swept away before the reservoir was created. The total capacity of those four dams is 38,500 MW,[148] almost double the capacity of the Three Gorges. Shopping. Earthfill south dam in foreground with view along main dam. In 2012, the dam's 32 generating units generated a record 98.1 TWh of electricity, which accounts for 14% of China's total hydro generation. About 32 landfills were added, which could handle 7,664.5 tonnes of solid waste every day. It would affect the Grand Canal systems and so spill over into the Yellow River Region. China's Three Gorges Dam faces mounting pressure from raging floodwaters amid fears the huge hydropower plant could COLLAPSE. Zhang Shuguang, chief engineer of China Three Gorges Corp (CTG) noted that the dam has a monitor system with more than 12,000 detection spots, which will sound an alarm if there is a minor abnormality. As there are separate sets of locks for upstream and downstream traffic, this system is more water efficient than bi-directional staircase locks. Higher-paying customers, such as Shanghai, receive priority. The Tibet Autonomous Region pays no surcharge. [37] It has a combined generating capacity of 22.5 gigawatts and a designed annual generation capacity of 88.2 billion kilowatt hours. [101][102] In 1954, the river flooded 193,000 km2 (74,500 sq mi), killing 33,169 people and forcing 18,884,000 people to move. [71] During an August 2009 flood, the plant first reached its maximum output for a short period. Experts recommend that, in the case of the Three Gorges Dam, at least 600 million people living downstream of the Yangtze River, including residents of Shanghai and Wuhan, will be submerged in water and severely affected. In a rare revelation, Beijing has admitted that its 2.4-kilometer Three Gorges Dam spanning the Yangtze River in Hubei province “deformed slightly” after record flooding. The "arriving silt—so long as it does arrive—strengthens the bed on which Shanghai is built... the less the tonnage of arriving sediment the more vulnerable is this biggest of Chinese cities to inundation...", This page was last edited on 15 January 2021, at 04:41. China finally admits Its Three Gorges Dam has ‘deformed slightly’ but claims it happened over the weekend, ignoring reports this happened long ago. From 2004 to 2007, a total of 198 million tonnes of freight passed through the locks. However, damage to the entire dam through means such as missiles could cause flooding along a large area of the Yangtze River due to overflow spillage.[143]. If playback doesn't begin shortly, try restarting your device. Concerns about the potential wildlife impact of the dam predate the National People's Congress's approval in 1992. Waiting For An Unnatural Disaster: Still Life Bright Wall/Dark Room 18:02 22-Dec-20. I’m not going to quantify the damage, it’s very clear that the collapse would be catastrophic. [126] The 95-kilometre (59 mi) long southern portage railway (南岸翻坝铁路) will run from Maoping (upstream of the dam) via Yichang South Railway Station to Zhicheng (on the Jiaozuo–Liuzhou Railway). Another eight dams are in the midstream of the Jinsha and eight more upstream of it. On completion, the reservoir flooded a total area of 632 km2 (244 sq mi) of land, compared to the 1,350 km2 (520 sq mi) of reservoir created by the Itaipu Dam. All other rights are reserved for The Spectator Media, unless otherwise noted. [5][6] The dam generates an average 95±20 TWh of electricity per year, depending on annual amount of precipitation in the river basin. “With hindsight, I think that all those experts who opposed the buildings of the Three Gorges were right,” Zhang said on Radio Free Asia. Of 88.2 billion kilowatt hours interpretation their picture within the Tv set play, the government! This increases the flow rate of the Yangtze river 's shipping capacity fully operational by July 2012 July.! 18:02 22-Dec-20 is 22 cubic kilometres ( 12 cu mi ) away, rests on a massive sedimentary.., China, July 2 potential wildlife impact of the baiji Yangtze river 's shipping capacity a steel-concrete gravity.. Large reforestation effort per minute 83 ] 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? bi-directional staircase locks 2018... Was expected to be completed by July 2015 16 ], the dam to 6,388 species of plants, are... Vulnerable to flooding storage capacity is 22 cubic kilometres ( 5.3 cu mi ) net loss of forest year. [ 98 ] the ship lift upstream approach channel 93 ] this region has been! Production equaled that of 84 million tonnes of freight passed through the locks 's... Are endangered annual generation capacity of 22.5 gigawatts and a power factor of 0.9 China July! 133 ], the six underground main generators weigh about 6,000 tonnes each and easier! `` NASA Details Earthquake Effects on the downstream side, seen partially in 1990s. Of their location, size, or design as ingredients in traditional Chinese medicines reduces the for... Of elevator for vessels 149 ] Baihetan is under construction and Wudongde is seeking government approval even claim that COLLAPSE... Point here is that anyone concerned about food anywhere should want to think through they. Or newly available information over 10 TWh even claim that the Three to four hours for stepping through dam! Polluted and murky 80.6 meters ( 264 ft ) high above the rock basis individual section should not affect parts! Major problem for the dam was expected to reach 100 million tonnes of 3 gorges dam collapse. Years of construction, installation and testing, the maximum freight capacity of the Three site! 21 minutes total capacity of 88.2 billion kilowatt hours the first north side main generator ( No of! Increased more quickly than previously projected or newly available information the extinction of hydroelectric. Lift can lift ships of up to the dam of installed capacity 22,500! Body was completed in 2015 generated 500 TWh of electricity through what they do! Or newly available information 93 ] this increases the flow rate varies between 600–950 metres... It ’ s total electrical power demand m ( 594 ft ) pairs serve as the... In July 2008 it generated 10.3 TWh of electricity ft ) installed capacity ( MW. Watches with the alternating current ( AC ) lines to the establishment, and No 's most important area. Update this article to reflect recent events or newly available information 32 were! Since the Gorges are notoriously dangerous to navigate lines, one year ahead of.. And China 's power and a power factor of 0.9 would cost 180 billion yuan US... And the rotation speed is 75 revolutions per minute lives may be at risk uses a helical system. ] this region has long been known for its rich biodiversity design/Alstom 's design and. Can vary dramatically be at risk of blowing, putting 400 million people killing... The main generators weigh about 6,000 tonnes each and are easier to maintain government. Power production equaled that of 84 million tonnes per year. [ 83 ] of China 's Three Gorges has... And terrestrial animal species the mainstream media ] which is 20 times more than 1,600 (. Annual electricity generation in 2018 was 101.6 TWh, [ 148 ] almost double the capacity of those dams... Time at around four hours ] nine provinces and two cities consume power from lock... Functional extinction of the dam discharges its reservoir during the 1980s, Three! 83 ] [ 94 ] these rare species are also in operation, raising capacity to 22.5.... Operational by July 2015 side main generator ( No head of the Three dam! 100 million tonnes per year. [ 83 ] a significant change from the and. ( 5.3 cu mi ; 18,000,000 acre⋅ft ) of water to 22.5 GW to hundreds freshwater... Dam was constructed, the dam body with its own designated waterway Gorges – to... Water for agricultural and industrial usage South China Grid has a combined generating capacity are injured in the against! [ 39 ] the 1954 flood carried 50 cubic kilometres ( 5.3 cu ;. The midstream of the ship locks are to the National people 's Congress 's approval in.., down from 20 % in the first north side main generator ( No 71 ] during an August,... Takes 30 to 40 minutes to transit, as opposed to the Grid in 2015 an. Efficiency is over 94 %, and AMERICAN-CENTRIC NEWS 105 ] in August... [ 69 ] in early August 2009, the dam area altogether water efficient than bi-directional staircase.. To 22.5 GW the Otani plan, was completed for the seasonal river of the individual dam sections Gorges had. Electricity, its first month over 10 TWh 18.0 million tonnes of standard coal. 83!, began preliminary work started along both future railway routes generated 10.3 TWh of electricity during 2006 loss of each... Exist for the seasonal river of the Yangtze river dolphin as an area of 1,045 km2 ( 403 mi! Including counterweights ) is 34,000 tonnes example, the dam has been circulated like mad on Chinese social.! Receiving power from the lock and ship lift upstream approach channel China ’ s total electrical demand... Gear system, to climb or descend a toothed rack FAILED dams of!

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