Effects of maintenance and raise of water level at yichang station by river bottom protection and roughness addition method and pool back - fill method in the reach from yichang to zhicheng of the changjiang river are calculated and compared by using a 2 - d flow numerical simulation method 摘要运用二维水流数值模拟方法，计算比较了在宜昌枝城的长江河段内选取重点控制河段，进行护底加糙及回填深槽对维护并抬高宜昌水位的效果。
