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我国有较大的河流一千五百多条,水能蕴藏量丰富,现已在黄河流域上修建了刘家峡、青铜峡、三门峡等多座大型水电站,在长江流域上游也修建了二滩、葛洲坝等多座水电站.在这些河流支流上,还修建了很多小型水电站.这些水电站都要修筑拦河大坝,以提高坝前上游水位.现在正在修建三峡水电站,拦长江水的大坝要建筑到180m以上.这样,处处都呈现“高峡出平湖”的景象(图1).
There are more than 1,500 rivers in China, and there are abundant reserves of water energy. Several large-scale hydropower stations such as Liujiaxia, Qingtongxia, and Sanmenxia have been built on the Yellow River Basin, and Ertan and Gezhouba have also been built in the upper reaches of the Yangtze River Basin. There are many hydropower stations. Many small hydropower stations have also been built on these river tributaries. These hydropower stations have to build dams to increase the water level upstream of the dam. The Three Gorges hydropower station is now under construction, and the dam to the Yangtze River is to be constructed. More than 180m. In this way, the scene of “High Gap out of Pinghu” is presented everywhere (Figure 1).