一、概况葛洲坝水利枢纽是长江干流上建设的第一座大坝,因坝址处于江中,该处原有一个小岛“葛洲坝”而得名。它是长江三峡水利枢纽的组成部分,设计装机21台,总容量271.5万千瓦,保证出力76.8万千瓦,年发电量141亿度,并能改善坝址上游100～200公里以上险滩河道的通航条件,距长江三峡江址37公里,三峡枢纽建成后,它可以调节三峡大坝以下河道 First, an overview Gezhouba Dam is the first dam on the construction of the mainstream of the Yangtze River, because of the dam in the river, where the original island “Gezhouba” named. It is an integral part of the Three Gorges Project and is planned to be equipped with 21 units with a total capacity of 2,715,000 kilowatts and a total output of 768 million kilowatts and an annual generating capacity of 14.1 billion kilowatts and to improve the navigation conditions of rapids and sands above 100-200 km upstream of the dam site , 37 kilometers away from the Three Gorges waterfront of the Yangtze River. After the completion of the Three Gorges Dam, it can adjust the following rivers of the Three Gorges Dam