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围堰发电的提出围堰发电就是对水利枢纽施工围堰所形成水头的水能利用。在一般河流的一般枢纽施工中,因为水头既小,未经调节的天然枯水流量很小,因而所得到的可靠出力也很小,加以施工期限很短,使围堰发电的运用期不长,所以是没有现实意义的。三峡水利枢纽的水量丯沛,平均枯水流量为3600公方/秒,频率为5％的最枯流量为3,300公方/秒,而施工期为了将频率为1％的洪峰流量79,500公方/秒绕过基坑引到下游,则需围堰形成上下游水位落差
Cofferdam power generation proposed cofferdam power generation is the cofferdam construction of cofferdam water head can be used. In the general hub construction of a general river, since the head is small and the unregulated flow rate of natural low water is very small, the reliable output is small and the construction period is short, so that the utilization period of the cofferdam is not long , So there is no realistic meaning. The water volume of the Three Gorges Dam, with an average dry flow of 3,600 km 2 / s, a maximum flow rate of 3,300 km 2 / s at a frequency of 5% and a construction period of 79,500 km / Seconds around the pit lead to the downstream, you need to form a cofferdam water level drop on the lower reaches