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Thursday, December 22, 2011

Dams and Reservoirs in China

Dams and reservoirs in China are numerous and there were 22,104 dams over the height of 15 m (49 ft) operating in China. Of the world's total large dams, China accounts for the most – 20 percent of them, 45 percent of which are used for irrigation.
The oldest in China still in use belongs to the Dujiangyan Irrigation System( in Sichuan province)  which dates back to 256 BC .




The tallest dam in China is the Xiaowan Dam at 292 m (958 ft)in Yunnan Province which is also the tallest arch dam in the world

In 2005, there were over 80,000 reservoirs in the country and over 4,800 dams completed or under construction that meet or exceed 30 m (98 ft) in height.
As of 2007, China is also the world's leader in the construction of large dams, just behind Turkey and Japan  in a distant third .
The largest reservoir is created by the Three Gorges Dam which stores 39.3 billion m3 (31,900,000 acre feet) of water and has a surface area of 1,045 km2 (403 sq mi). Three Gorges is also the world's largest power station.
 

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