Lijiaxia Dam

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Lijiaxia Dam

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Lijiaxia Dam
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Location of Lijiaxia Dam in China
Country China
Location Jainca County, Qinghai Province
Coordinates 36°07′06″N101°48′28″E / 36.11833°N 101.80778°E / 36.11833; 101.80778 Coordinates: 36°07′06″N101°48′28″E / 36.11833°N 101.80778°E / 36.11833; 101.80778
Status In use
Construction began 1988
Opening date 1997
Dam and spillways
Type of dam Arch gravity dam
Impounds Yellow River
Height 155 metres (509 ft)
Length 396 metres (1,299 ft)
Width (crest) 8 metres (26 ft)
Width (base) 45 metres (148 ft)
Spillway type Service, gate-controlled on crest
Reservoir
Creates Lijiaxia Reservoir
Total capacity 1,650,000,000 cubic metres (1,337,677 acre⋅ft)
Catchment area 136,747 square kilometres (52,798 sq mi)
Surface area 383 square kilometres (148 sq mi)
Power Station
Hydraulic head 122 metres (400 ft) (design)
Turbines 5 x 400 MW
Installed capacity 2,000 MW

The Lijiaxia Dam (李家峡水库) is a concrete arch-gravity dam on the Yellow River in Jainca County, Qinghai Province, China. The dam houses a hydroelectric power station with 5 x 400 MW generators for a total installed capacity of 2,000 MW. Construction began in April 1988 and the reservoir began to fill on December 26, 1996. On January 26, 1997, the initial reservoir operating level was reached and the first generator was commissioned in February. [1]

Arch-gravity dam dam with the characteristics of both an arch dam and a gravity dam

An arch-gravity dam or arched dam is a dam with the characteristics of both an arch dam and a gravity dam. It is a dam that curves upstream in a narrowing curve that directs most of the water against the canyon rock walls, providing the force to compress the dam. It combines the strengths of two common dam forms and is considered a compromise between the two. They are made of conventional concrete, Roller Compacted Concrete (RCC), or masonry. Arch-gravity dams are not reinforced except at the spillway. A typical example of the conventional concrete dam is the Hoover Dam. Changuinola Dam is an example of the RCC arch-gravity dam. A gravity dam requires a large volume of internal fill. An arch-gravity dam can be thinner than the pure gravity dam and requires less internal fill.

Yellow River second longest river in China

The Yellow River or Huang He is the second longest river in China, after the Yangtze River, and the sixth longest river system in the world at the estimated length of 5,464 km (3,395 mi). Originating in the Bayan Har Mountains in Qinghai province of Western China, it flows through nine provinces, and it empties into the Bohai Sea near the city of Dongying in Shandong province. The Yellow River basin has an east–west extent of about 1,900 kilometers (1,180 mi) and a north–south extent of about 1,100 km (680 mi). Its total drainage area is about 752,546 square kilometers (290,560 sq mi).

Jainca County County in Qinghai, China

Chentsa County or Jainzha County is a county in Huangnan Tibetan Autonomous Prefecture in Qinghai Province, China, to Tibetans in the area known as Malho Prefecture, part of Amdo. There are 6 townships, 3 towns and a total of 79 administrative villages in Chentsa county. The county has an area of 1714 square kilometres and a population of ~50,000 (2001), 67% Tibetan. The county seat is the town of Markhu Thang.

See also

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References

  1. Bai, Junguang Bai , Shengdi Lu , and Jianshe Han; Lu, Shengdi; Han, Jianshe (2008). "Landslides and Engineered Slopes. From the Past to the Future". CRC Press. p. 1077. doi:10.1201/9780203885284-c141. ISBN   978-0-415-41196-7 . Retrieved 8 January 2011.|chapter= ignored (help)