Tianshengqiao-II Dam

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Tianshengqiao-II Dam
China edcp relief location map.jpg
Red pog.svg
Location of Tianshengqiao-II Dam in China
Official name Tianshengqiao-II Hydropower Station
Location China
Coordinates 24°57′47″N105°09′19″E / 24.96306°N 105.15528°E / 24.96306; 105.15528 Coordinates: 24°57′47″N105°09′19″E / 24.96306°N 105.15528°E / 24.96306; 105.15528
Construction began 1982
Opening date 1997
Dam and spillways
Type of dam Embankment, concrete face rock-fill
Impounds Nanpan River
Height 58.7 m (193 ft)
Length 471 m (1,545 ft)
Dam volume 4,800,000 m3 (6,278,163 cu yd)
Spillway type Service, gate controlled
Creates Tianshengqiao-II Reservoir
Total capacity 26,000,000 m3 (21,079  acre⋅ft)
Power Station
Commission date 1998
Turbines 6 x 220 MW (300,000 hp) Francis turbines
Installed capacity 1,320 MW (1,770,000 hp)

The Tianshengqiao-II Dam (locally abbreviated as TSQ-II) is a dam and hydroelectric power station on the Nanpan River in the Anlong and Longlin districts in China. Construction of the dam and power plant began in 1982 and was complete in 1997.

Dam A barrier that stops or restricts the flow of surface or underground streams

A dam is a barrier that stops or restricts the flow of water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect water or for storage of water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC.

Nanpan River river in the Peoples Republic of China

The Nanpan River has its source in the Yungui Plateau of eastern Yunnan Province. It then flows east, forming part of the border between Guizhou and Guangxi provinces. It joins with the Beipan River to become the Hongshui River.

The dam's reservoir is fed by the tailwaters of the Tianshengqiao-I Dam 7 km (4 mi) upstream. The dam diverts water east into three 9.53 km (6 mi) long and 9 m (30 ft) diameter headrace tunnels towards the actual power station 24°56′47″N105°15′07″E / 24.94639°N 105.25194°E / 24.94639; 105.25194 . At the power station, the water powers six 220 megawatts (300,000 hp) Francis turbines for the production of 1,320 MW (1,770,000 hp) of electricity. [1]

Tianshengqiao-I Dam lake

The Tianshengqiao-I Dam is a concrete face rock-fill embankment dam and hydroelectric power station on the Nanpan River straddling the border between Guizhou and Guangxi, People's Republic of China, located in the counties of Anlong and Longlin. The dam is 178 m (584 ft) tall, and was completed in 1998. Water from the dam's reservoir powers four generators with Francis turbines, each with a capacity of 300 MW. Water released from the dam also powers Tianshengqiao-II Dam (TSQ-II) downstream. The power is transmitted to Guangzhou via HVDC Tian-Guang and an AC powerline.

Francis turbine type of water turbine that was developed by James B. Francis in Lowell, Massachusetts

The Francis turbine is a type of water turbine that was developed by James B. Francis in Lowell, Massachusetts. It is an inward-flow reaction turbine that combines radial and axial flow concepts.

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  1. "Tianshengqiao Hydro Electric Power Generation Project (1)-(6)" (PDF). Japan International Cooperation Agency. September 2002. Retrieved 3 January 2011.