Xiaowan Dam | |
---|---|
Official name | 小湾坝 |
Coordinates | 24°42′11″N100°05′31″E / 24.70306°N 100.09194°E Coordinates: 24°42′11″N100°05′31″E / 24.70306°N 100.09194°E |
Status | Operational |
Construction began | 1 January 2002 |
Opening date | March 2010 |
Construction cost | US$3.9 billion |
Dam and spillways | |
Type of dam | Arch, double-curvature |
Height | 292 m (958 ft) |
Length | 902 m (2,959 ft) |
Elevation at crest | 1,245 m (4,085 ft) |
Width (crest) | 13 m (43 ft) |
Width (base) | 69 m (226 ft) [1] |
Spillway type | Crest/tunnel |
Spillway capacity | 10,014 m3/s (353,641 cu ft/s) Flood discharge (all outlets): 20,709 m3/s (731,331 cu ft/s) |
Reservoir | |
Total capacity | 15,043,000,000 m3 (12,196,000 acre⋅ft) |
Active capacity | 9,895,000,000 m3 (8,022,000 acre⋅ft) |
Catchment area | 113,300 km2 (43,700 sq mi) |
Surface area | 190 km2 (73 sq mi) |
Normal elevation | 1,240 m (4,068 ft) [2] |
Power Station | |
Operator(s) | Huaneng |
Commission date | 2009-2010 |
Hydraulic head | 251 m (823 ft) (max) |
Turbines | 6 × 700 MW Francis-type |
Installed capacity | 4,200 MW |
The Xiaowan Dam (simplified Chinese :小湾坝; traditional Chinese :小灣壩; pinyin :Xiǎowān Bà) is an arch dam on the Lancang (Mekong) River in Nanjian County, Yunnan Province in southwest China. The primary purpose of the dam is hydroelectric power generation and it supports a 4,200 MW power station. Constructed between 2002 and 2010 by Huaneng Power International at a cost of ¥32 billion (nearly US$3.9 billion), it is the world's second highest arch dam at 292 m (958 ft). It is also third highest among dams of all types behind Jinping-I and Nurek and the third largest hydroelectric power station in China. [3] [4] [5] [6]
The feasibility study for the dam was completed in 1992, with it as part of the Lancang River Project. In 1995 the report was reviewed and approved by the Chinese government. Three years later in 1998, a consortium to fund and construct the dam was organized. In 1999, preliminary construction (roads, bridges, river diversion) began. Official construction on the dam started on 1 January 2002. The river was diverted by November 2003 and concrete pouring began in 2005. The river diversion was closed and the reservoir began to impound in November 2007. [1] The first generator was commissioned in September 2009 and the dam was complete in March 2010. [4] [7] The last of the six generators went operational on 22 August 2010. [8] The creation of the dam's reservoir submerged 55,678 ha (137,583 acres) of land and displaced 32,737 people. [1]
The Xiaowan Dam is a 292 m (958 ft) tall and 902 m (2,959 ft) long double-curvature arch dam. Its crest is 13 m (43 ft) wide while the base sits at 69 m (226 ft) in width. The dam's crest is at an elevation of 1,245 m (4,085 ft) while the normal reservoir level is slightly lower at 1,240 m (4,068 ft). The dam's reservoir has a normal storage capacity of 15,043,000,000 m3 (12,196,000 acre⋅ft); of that capacity, 9,895,000,000 m3 (8,022,000 acre⋅ft) is active (or "useful") storage. The dam traps water from a catchment area covering 113,300 km2 (43,700 sq mi). The surface of the reservoir at normal level covers 190 km2 (73 sq mi). [1]
Helping to control floods, the dam has two spillways, 5 gates near the crest and a tunnel on the left bank. The gates can discharge up to 5,130 m3/s (181,164 cu ft/s) while the tunnel has a maximum discharge of 4,884 m3/s (172,477 cu ft/s). In the middle portion of the dam, there are six orifice openings that can discharge 6,500 m3/s (229,545 cu ft/s). In addition, the dam can release additional water and sediment with two bottom outlets. All of the dam's outlets including the power station give it a maximum flood discharge of 20,709 m3/s (731,331 cu ft/s). [1]
On the right bank of the dam is the power station intake which receives water into six 9.6 m (31 ft) diameter penstocks which each feed a 700 MW Francis turbine-turbine in the underground power station. The drop in elevation from the intake to the turbine affords a maximum hydraulic head of 251 m (823 ft). Once discharged by the turbine, the water is sent down one of two 18 m (59 ft) diameter tailrace tunnels towards the river. [1]
The Kurobe Dam (黒部ダム) or Kuroyon Dam (黒四ダム), is a 186 m (610 ft) high variable-radius arch dam on the Kurobe River in Toyama Prefecture, Japan. The tallest dam in Japan, it supports the 335 MW Kurobe No. 4 Hydropower Plant and is owned by Kansai Electric Power Company. It was constructed between 1956 and 1963 at a cost of ¥51.3 billion yen. The project was a difficult engineering feat for the rapidly growing post–World War II Japan, and claimed the lives of 171 people.
The Xiluodu Dam is an arch dam on the Jinsha River, i.e. the upper course of the Yangtze in China. It is located near the town of Xiluodu in Yongshan County of Yunnan Province but the dam straddles into Leibo County of Sichuan Province on the opposite side of the river. The primary purpose of the dam is hydroelectric power generation and its power station has an installed capacity of 13,860 MW. Additionally, the dam provides for flood control, silt control and its regulated water releases are intended to improve navigation downstream. Construction on the dam and power station began in 2005 and the first generator was commissioned in 2013, the last in 2014. It is operated by China Yangtze Power and is currently the fourth-largest power station in the world, as well as the fifth tallest dam world-wide.
Nuozhadu Dam is an embankment dam on the Lancang (Mekong) River in Yunnan Province in southwest China. The dam is 261.5 m (858 ft) tall, and creates a reservoir with a normal capacity of 21,749,000,000 m3 (17,632,000 acre⋅ft) at a level of 812 m (2,664 ft) asl. The purpose of the dam is hydroelectric power production along with flood control and navigation. The dam supports a power station with nine generators, each with generating capacity of 650 MW. The total generating capacity of the power station is 5,850 MW. Construction on the project began in 2004; the dam's first generator went online 6 September 2012 and the last generator was commissioned in June 2014. The construction and management of the project was implemented by Huaneng Power International Ltd., which has a concession to build, own and operate hydroelectric dams on China's stretch of the Mekong River.
The Ertan Dam is an arch dam on the Yalong River, a tributary of the Yangtze River in Sichuan Province, southwest China.
Deriner Dam is a concrete double-curved arch dam on the Çoruh River 5 km (3.1 mi) east of Artvin in Artvin Province, Turkey. The main purpose of the dam is hydroelectric power production and additionally flood control. Construction on the dam began in 1998, the reservoir began to fill in February 2012 and the power station was completed by February 2013. It will have a 670 MW power house and is the tallest dam in Turkey. The dam is being implemented by Turkey's State Hydraulic Works and constructed by a consortium of Turkish, Russian and Swiss companies.
The Dachaoshan Dam is a gravity dam on the Lancang (Mekong) River in Yunnan Province, China. The sole purpose of the dam is hydroelectric power production as it supplies water to a power station containing six 225 MW generators for a total installed capacity of 1,350 MW.
The Fengman Dam is a concrete gravity dam 20 km (12 mi) from Jilin City on the Second Songhua River in Jilin Province, China. The main purposes of the dam are hydroelectric power generation and flood control. Construction of the dam began in 1937 and was complete in 1953. The dam is owned and operated by Northeast China Grid Company Limited.
The Zimapán Dam, also known as Fernando Hiriart Balderrama Dam, is an arch dam on the Moctezuma River about 15 km (9 mi) southwest of Zimapán in Hidalgo state, Mexico. The primary purpose of the dam is hydroelectric power production and it services a 292 MW power station with water.
The Jinping-I Dam also known as the Jinping-I Hydropower Station or Jinping 1st Cascade, is a tall arch dam on the Jinping Bend of the Yalong River in Liangshan, Sichuan, China. Construction on the project began in 2005 and was completed in 2014. Its power station has a 3,600 MW capacity to produce between 16 and 18 TW·h annually. Supplying the power station is a reservoir created by the 305-meter-tall arch dam, the tallest in the world. The project's objective is to supply energy for expanding industrialization and urbanization, improve flood protection, and prevent erosion.
The Jinshuitan Dam is an arch dam on Longquan Creek, a tributary of the Oujiang River in Zhejiang Province, China. It is located about 47 km (29 mi) southwest of Lishui. The dam and power station were completed in 1988 and serve several purposes to include hydroelectric power generation, water supply, flood control and navigation. It is the first dam of the Oujiang River cascade to be constructed and creates the second largest lake in Zhejiang.
The Dongfeng Dam is an arch dam on the Wu River 65 km (40 mi) northwest of Qingzhen in Guizhou Province, China. The primary purpose of the dam is hydroelectric power generation and it supports a 570 MW power station. Construction on the dam began in 1989 and the first generator was operational in 1994, the last in 1995. The generators were up-rated between 2004 and 2005; bringing their capacity from 170 MW each to 190 MW.
The Huanglongtan Dam is a concrete gravity dam located on the Du River, a tributary of the Han River. It is located 25 km (16 mi) west of Shiyan in Hubei Province, China. The main purpose of the dam is hydroelectric power generation but it also provides for flood control. It was constructed between 1969 and 1976 and support a 510 MW power station.
The Hunanzhen Dam is a trapezoidal buttress dam on the Qiantang River, located 27 km (17 mi) south of Quzhou in Zhejiang Province, China. The primary purpose of the dam is hydroelectric power generation but it also serves to provide for flood control and irrigation water supply. Construction on the dam began in 1958 but was halted in 1961. It recommenced in 1970, the first generator was operational in 1979 and the project complete in 1980. The original installed capacity of the dam's power plant was 170 MW but the plant was expanded with an additional 100 MW generator, commissioned in 2006.
The Longshou II Dam, also referred to as Longshou No. 2, is a concrete-face rock-fill dam on the Heihe River, located 35 km (22 mi) southwest of Zhangye in Gansu Province, China. It is part of the Gansu Heihe Rural Hydropower Development and supports a 157 MW power station. The dam's first feasibility study was carried out in 2000 and river diversion construction began in December 2001. In June 2002, the river was diverted and in September that year, filling of the dam's body began. On 17 August 2004, the first generator was operational with the rest by the end of the year. The 146.5 m (481 ft) high dam withholds a reservoir with a capacity of 86,200,000 m3 (69,883 acre⋅ft). It's spillway is located on the right bank and is a controlled chute type with a discharge capacity of 2,696 m3/s (95,208 cu ft/s). Water is delivered to the dam's power station downstream via a 1.7 km (1 mi) long tunnel. The dam is located upstream of the Longshou I Dam, an 80 m (262 ft) tall double-curvature arch dam with an installed capacity of 52 MW. Upstream is the Xiaogushan Dam, a gravity dam which diverts water to a 102 MW power station.
The Unbong Dam, or Yunfeng Dam, is a concrete gravity dam on the Yalu River which borders China and North Korea. It is located 33 km (21 mi) northeast of Ji'an in Jilin Province, China and Chasŏng in Chagang Province, North Korea. The primary purpose of the dam is hydroelectric power generation and it supports a 400 MW power station. Construction of the dam had initially began in August 1942 but was halted in 1945 after the surrender of Japan ending World War II. In October 1959, construction on the dam recommenced and in September 1965, the first of the four 100 MW Francis turbine-generators was operational. The last generator was operational on 4 April 1967. The 113.75 m (373 ft) tall dam creates a reservoir with a storage capacity of 3,895,000,000 m3 (3,157,728 acre⋅ft). The dam's spillway is an overflow type with 21 floodgates and has a maximum discharge of 21,900 m3/s (773,391 cu ft/s). The dam is located before a bend in the river and its power station is located on the other side of a ridge that meets the dam's right abutment. Water is delivered to the power station via two tunnels, 775 m (2,543 ft) and 759 m (2,490 ft) long. Generators 1 and 3 deliver power to China while 2 and 4 deliver to North Korea.
The Shweli I Dam is a gravity dam on the Shweli River about 23 kilometres (14 mi) southwest of Namhkam in Shan State, Burma. The primary purpose of the dam is hydroelectric power generation and it supports a 600 megawatts (800,000 hp)power station. Water from the dam's reservoir is diverted through a 5.1 kilometres (3.2 mi) long headrace tunnel to the power station downstream. The drop in elevation affords a hydraulic head of 299 metres (981 ft). Construction on the dam began in 2002 and the river was diverted on 10 December 2006. On 5 September 2008, the first generator was commissioned and the last of the six was commissioned in April 2009. The dam and power station was constructed under the build–operate–transfer method and cost US$756.2 million. It is owned and operated by the Shweli River-I Power Station Co. The Shweli II and Shweli III Dams are planned downstream.
The Lubuge Dam is a rock-fill embankment dam on the Huangni River, a tributary of the Nanpan River, located near Lubugexiang in Luoping County on the border of Guizhou and Yunnan Provinces, China. The primary purpose of the dam is hydroelectric power generation and it supports a 600 MW power station. Construction on the project began in 1982 and it was completed in 1991. Funded by the World Bank, it was the first loan offered by the bank to China's power sector.
The Miaowei Dam is a rock-filled embankment dam on the Lancang (Mekong) River in Yunlong County of Yunnan Province, China. Construction on the dam began in 2010. The four turbines of 1,400 MW hydroelectric power station were commissioned in 2017 and 2018.
The Dahuaqiao Dam is a gravity dam on the Lancang River in Lanping Bai and Pumi Autonomous County of Yunnan Province, China. The primary purpose of the dam is hydroelectric power generation. Construction began in 2010 and its 900 MW hydroelectric power station was fully operational as of 2019.
{{cite journal}}
: Cite journal requires |journal=
(help)