Gongboxia Dam | |
---|---|
Country | China |
Location | Longhua County, Qinghai Province |
Coordinates | 35°52′39″N102°13′40″E / 35.87750°N 102.22778°E Coordinates: 35°52′39″N102°13′40″E / 35.87750°N 102.22778°E |
Construction began | 2000 |
Opening date | 2006 |
Dam and spillways | |
Impounds | Yellow River |
Height | 132 m (433 ft) |
Length | 429 m (1,407 ft) |
Width (crest) | 10 m (33 ft) |
Spillways | 2 |
Spillway type | Service, controlled chute |
Reservoir | |
Creates | Gongboxia Reservoir |
Total capacity | 630,000,000 m3 (510,749 acre⋅ft) |
Catchment area | 143,619 km2 (55,452 sq mi) |
Power Station | |
Installed capacity | 1,500 MW |
Annual generation | 5.14 billion kWh |
The Gongboxia Dam is a concrete face rock-fill embankment dam on the Yellow River in Longhua County, Qinghai Province, China. The dam supports a 1,500 MW hydroelectric power station.
An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil, sand, clay, or rock. It has a semi-pervious waterproof natural covering for its surface and a dense, impervious core. This makes such a dam impervious to surface or seepage erosion. Such a dam is composed of fragmented independent material particles. The friction and interaction of particles binds the particles together into a stable mass rather than by the use of a cementing substance.
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).
Longhua County is a county in the northeast of Hebei province, China, bordering Inner Mongolia to the east. It is under the administration of Chengde City.
Construction on the dam began in July 2000 by diverting the river and by August 15 the next year, the river was diverted and excavation began on the foundation. On August 1, 2002, workers began to create the embankment and by October the next year, the dam's body was almost complete. Concrete pouring on the face slab began in March 2004 and was complete by June. Filling of the reservoir began in August and in 2006 the project was complete. [1]
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