太湖流域锡澄片主城区畅流活水方案研究

Research on the Scheme of Water Transfer in the Main District of Xicheng Area in Taihu Basin

针对太湖流域近年来城市化带来的城市河网水体滞留、水环境恶化问题,探究活水对流域水体流动性和水环境的改善效果。选取太湖流域锡澄片主城区为典型区域,构建一维非稳态水动力水质耦合模型,拟定了多种沿江枢纽和相关内河闸站配合的方案,探究活水对太湖流域平原河网的影响,定量评估不同水平的活水方案对研究区水体流动性和水环境的改善效果。结果表明,配置合理的活水方案可有效改善主城区河道的流动性及水环境;超过一定水量后,随着流量的增加,河道水质改善效果的提升很小。

Considering the problem of urban river water retention and water environment deterioration brought by urbanization in Taihu Basin in recent years,the main district of Xicheng area in Taihu Basin is selected as a typical area,and a one-dimensional unsteady hydrodynamic water quality coupling model is constructed to explore the effect of water transfer on the flow fluidity and water environment.A variety of schemes have been worked out for the cooperation of various hydro-junctions and sluice stations,so as to explore the influence of water transfer on the river network in Taihu Basin,and to quantitatively evaluate the improvement of different levels of water transfer schemes on water fluidity and water environment in the study area.The results show that the well-configured water transfer scheme can effectively improve the water environment of the main district of Xicheng area.After a certain amount of water is exceeded,the improvement effect of river water quality is very small with the increase in flow.