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长江是中国最大河流,干流全长6300公里,流域集水总面积180万平方公里,年平均入海量约9600余亿立方米。从干流长度和入海水量论,长江均居世界第三位。三峡水利枢纽坝址位于长江干流上游的分界处,坝址控制流域面积100万平方公里,多年平均迳流量4510亿立方米,在世界上已建和在建水利枢纽中,与葛洲坝工程同属坝址年迳流量最大的水利枢纽。一、世界上效益最大的水利枢纽长江三峡水利枢纽是多目标开发的综合利用工
The Yangtze River is China’s largest river, with a total length of 6,300 kilometers and a watershed catchment area of 1,800,000 square kilometers with an average annual volume of about 9,600 billion cubic meters. From the length of the main stream and into the sea of water, the Yangtze River ranks third in the world. The dam site of the Three Gorges Dam is located at the boundary of the upper reaches of the mainstream of the Yangtze River. The dam control basin covers an area of 1 million square kilometers and has an average flow of 451 billion cubic meters for many years. The dam site of the Three Gorges Dam, together with the dam site under construction in Gezhouba Project, The annual flow of the largest water conservancy hub. First, the world’s most effective water conservancy hub The Three Gorges Project is a comprehensive utilization of multi-target development