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葛洲坝水利枢纽位于长江南津关下游2。3公里处,是三峡水利枢纽下游的航运梯级.长江水量丰沛,来沙量大,宜昌站1950～1980年多年平均径流量为4378亿立米,多年平均输沙量为5.15亿吨.坝区河床形态变化多端,急剧转弯,骤然扩宽,山咀挑流,河床大倒坡,以及河道分汉,大支流黄柏河入汇等边界条件错综复杂,从而河段的水流条件亦十分复杂,环流、回流、剪刀水、泡、漩等交织在一起.而坝区引航道对水流流态及航深的要求十分苛刻,因此,航道泥沙问题的解决,难度是很大的.三江航道位于南津关弯道凹岸下游,地处迎流取水的位置,这是有利的自然条件.但是
The Gezhouba Dam is located 2.3 km downstream of the Nanjin Pass in the Yangtze River and is the shipping step at the lower reaches of the Three Gorges Water Conservancy Project.The abundant water in the Yangtze River has a large amount of sediment, and the average runoff of Yichang Station from 1978 to 1980 was 437.8 billion cubic meters, Sediment area of 515 million tons of dam area changes in the shape of the river, sharp turn, a sudden widening, Shan Tsui pick flow, the river bed downhill, and the channel Han, tributary of the Yellow River into the exchange and other boundary conditions intricate, Of the water flow conditions are also very complicated, circulation, reflux, scissors water, bubble, swirl, etc. intertwined.While the dam channel for water flow and flight depth is very demanding, therefore, the solution to the problem of sediment in the channel is difficult Great. Sanjiang waterway is located in the downstream of NanJinGuan bend, located in YingGuiShui water position, which is favorable natural conditions.But