Guangzhao Dam

The Guangzhao Dam is a concrete gravity dam on the Beipan River near Guangzhao in Guanling County, Guizhou Province, China. The main purpose of the project is hydroelectric power generation with additional purposes of water regulation and irrigation. It creates the uppermost or head reservoir on the Beipan and was constructed between 2003 and 2008.

Guangzhao Dam
Location of Guangzhao Dam in China
CountryChina
LocationGuangzhao, Guanling County, Guizhou Province
Coordinates25°57′34″N 105°15′03″E
StatusIn use
Construction beganMay 2003
Opening date2008
Dam and spillways
Type of damGravity
ImpoundsBeipan River
Height200.5 metres (658 ft)
Length410 metres (1,345 ft)
Dam volume2,800,000 cubic metres (98,881,067 cu ft)
Spillways3
Spillway typeService, surface crest
Spillway capacity9,857 cubic metres per second (348,097 cu ft/s)
Reservoir
CreatesGuangzhao Reservoir
Total capacity3,254,000,000 cubic metres (2,638,061 acre⋅ft)
Catchment area13,548 square kilometres (5,231 sq mi)
Surface area51.54 square kilometres (20 sq mi)
Power Station
Installed capacity1,040 MW
Annual generation2,745 GWh (mean)

Construction

Construction on the dam began in May 2003 and the river was diverted in October 2004.[1] Reservoir filling began in 2007 and by 2008, the dam and power plant were complete. On June 28, 2010, a landslide in the area of the dam that killed 99 locals was believed to be caused by seismic effects from the reservoir.[2]

Specifications

The dam is 200.5 metres (658 ft) tall and 410 metres (1,345 ft) wide and composed of roller-compacted concrete. It also contains three spillway chutes on its surface. Each spillway is controlled by a 16 metres (52 ft) wide and 20 metres (66 ft) tall floodgate and they have a combined maximum discharge of 9,857 cubic metres per second (348,097 cu ft/s). The dam also contains a bottom outlet works for draining the reservoir which a maximum discharge capacity of 799 cubic metres per second (28,216 cu ft/s).[1]

See also

References

  1. "Guangzhao Hydropower Project" (PDF). Chinese National Committee on Large Dams. Retrieved 8 January 2011.
  2. Xiao, Fan (July 15, 2010). "Chinese dam played role in deadly landslide". International Probe. Archived from the original on 13 July 2010. Retrieved 8 January 2011.
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