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一、概述葛洲坝水利枢纽是长江三峡水利枢纽的航运梯级。坝址位于南津关下游三公里。长江由南津关出口后,流向自东南急转向西南,江面宽度由300米骤增至2,200米,坝址处有葛洲坝和西坝两岛将长江分为大江、二江和三江,大江江面宽度800米,江底高程30米左右(指吴淞零点),为主河槽,二、三江分别在流量13,000立米/秒和21,000立米/秒时开始分流,枯水期二、三江断流。
I. Overview Gezhouba Dam is the Three Gorges Project of the Yangtze River shipping ladder. Dam site is located three kilometers downstream of Nanjin. After the Yangtze River is exported from Nanjin Pass, its flow direction changes sharply from south east to southwest. The width of the river surface has risen sharply from 300 meters to 2,200 meters. There are Gezhouba Dam and Xiba Dam at the dam site. The Yangtze River is divided into two major rivers, two rivers and three rivers. Meters, the elevation at the bottom of the river about 30 meters (referring to Wusong zero), the main channel, the second and the third river flow at 13,000 cubic meters / second and 21,000 cubic meters / second began to divert, dry season two, three rivers off.