Longtan Dam
Dam in Tian'e County, Guangxi / From Wikipedia, the free encyclopedia
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Longtan Dam (simplified Chinese: 龙滩大坝; traditional Chinese: 龍灘大壩; pinyin: Lóngtān Dàbà) is a large roller-compacted concrete (RCC) gravity dam on the Hongshui River in Tian'e County of the Guangxi Zhuang Autonomous Region, China, a tributary of the Xi River and the Pearl River.[1][2][3][4][5][6] The dam is 216.2 metres (709.3 ft) high and 849 m (2,785 ft) long; it is the tallest of its type in the world.[7] The dam is intended for hydroelectric power production, flood control and navigation. The dam contains seven surface spillways, two bottom outlets and an underground power station. The Longtan ship lift, part of the dam complex, will be the tallest ship lift system in the world.[8]
Longtan Dam | |
---|---|
Official name | 龙滩大坝 |
Country | China |
Location | Tian'e County, Guangxi |
Coordinates | 25°01′38″N 107°02′51″E |
Status | In use |
Construction began | 2001 |
Opening date | 2009 |
Construction cost | US$4.2 billion |
Owner(s) | Longtan Hydropower Development Co., Ltd. |
Dam and spillways | |
Type of dam | Gravity |
Impounds | Hongshui River |
Height | 216.2 m (709 ft) |
Length | 849 m (2,785 ft) |
Dam volume | 7,670,000 m3 (10,031,981 cu yd) |
Spillway type | Service, controlled |
Spillway capacity | 27,134 m3/s (958,228 cu ft/s) (max flood) |
Reservoir | |
Creates | Longtan Reservoir |
Total capacity | 27,270,000,000 m3 (22,108,149 acre⋅ft) |
Active capacity | 20,530,000,000 m3 (16,643,942 acre⋅ft) |
Catchment area | 98,500 km2 (38,031 sq mi) |
Normal elevation | 400 m (1,312 ft) |
Power Station | |
Commission date | 2007-2009 |
Hydraulic head | 179 m (587 ft) (max.) |
Turbines | 9 × 714 MW Francis-type |
Installed capacity | 6,426 MW |
Annual generation | 18,700 GWh (estimate) |