葛洲坝水利枢纽建设前,长江主流由大江下泄。建坝后,主流改由二江泄水闸通过,由于二江泄水闸面对西坝凸肚,主流出泄水闸后朝向凸肚冲射,经护岸顶托折向河道右侧,与大江电站下游尾水掺混。因此,这一片水域出现了建坝前所没有的涌浪、乱流。大江船闸下游引航道和相连接的 Before the construction of Gezhouba Dam, the mainstream of the Yangtze River was discharged from the river. After the dam was built, the main stream was changed to pass through the two rivers’ sluice gates. Since the Erjiang sluice gate faced the Xiba dam belly, the mainstream sluice gate headed towards the convex belly and shot through the revetment top to the right of the river course, Tail water blending. As a result, there was no surging or turbulence in this area of ​​water before the dam was built. The downstream navigation channel of the river lock and connected