葛洲坝工程位于长江三峡出口南津关以下约3公里处,控制流域面积100万公里~2,占长江总流域面积的55%。坝址正处于峡谷深槽过渡到宽浅河床的河段,河面由峡谷处的300米骤然展宽至坝址处的2,200米。江水出峡后,流向由东急转向南,水深骤减。坝址处原有葛洲坝,西坝两岛位于江中,把长江分为大江,二江、三江,江水受南津关左岸突出的石梁,山 The Gezhouba Dam project is located about 3 km below the Nanjin Pass at the Three Gorges Exit of the Yangtze River and controls 1 million km2 in its catchment area, accounting for 55% of the total catchment area of ​​the Yangtze River. The dam site is in the middle of a canyon transition from a deep channel to a shallow riverbed. The river surface is suddenly widened from 300 meters at the gorge to 2,200 meters at the dam site. After the river flows from the Gap, the flow changes from Tokyu to the south and the water depth plummets. Dam site at the original Gezhouba, Xiba two islands located in the river, the Yangtze River is divided into the river, two rivers, three rivers, south of the river by the South Bank off Shiliang outstanding mountains