长江下游通州沙西水道整治工程效果分析

针对通州沙西水道存在的诸多问题,2011—2016年间通州沙西水道实施了大规模的河道整治工程,为通州沙汊道形成稳定的双分汊河型创造了有利条件。根据近年来实测水文、地形资料,从通州沙西水道分流比、通州沙沙体、河道的冲淤、河道尺度等方面,分析通州沙西水道河道演变出现的新变化以及整治工程效果。结果表明:通州沙沙体基本稳定,西水道分流比增加2. 4%,-5 m河槽全线贯通,四干河以下-10 m河槽基本贯通,达到工程预期效果。

Regulation engineering effect of west waterway of Tongzhou Shoal in lower reaches of the Yangtze River

Aiming at the problems of the west waterway of Tongzhou Shoal,a large-scale regulation project was carried out in the west waterway of Tongzhou Shoal from 2011 to 2016,through which favorable conditions for the formation of stable double-branch river in Tongzhou Shoal branch channel.Based on the hydrological and topographic data measured in recent years,we analyze the new changes in the evolution of the west waterway of Tongzhou Shoal and the effect of the regulation project from the aspects of diversion ratio in the west waterway of Tongzhou Shoal,Tongzhou Shoal body,waterway erosion and deposition,as well as the waterway scale.The analysis results show that Tongzhou Shoal body is basically stable,the diversion ratio is increased by 2.4% in the west waterway of Tongzhou Shoal,the -5 m river channel is completed and the -10 m river channel below the Sigan River is completed,and the expected effect of the project is achieved basically.