赣江尾闾主支河道整治效果分析

摘要

赣江尾闾主支河道枯期水位屡创新低,对水资源利用、通航、水景观水环境等都将产生不利影响,并且未来赣江尾闾河段的枯季水位仍然存在逐渐降低的趋势.通过分析主支河道近年来的水沙特性,建立平面二维水流泥沙数学模型,选取了1992、2002、2004年的水沙资料对该河段进行数值模拟研究.对比分析整治工程实施前后该河段的河床冲淤、洪枯水位、航道水深变化以及边滩利用情况,证明主支河道整治工程能有效调控河道枯季水位、保障航道通航水深、改善水景观、提高洲滩利用率,从而促进当地的水运经济发展.%The dry season water level is recording low in main branch channel of Ganjiang River sink,in which has adverse impact on the utilization of water resources,navigation,waterfront landscape and water environment.And it will remain gradual decrement trend in the future.This research establishes a 2-D flow and sediment mathematical modal through analyzing the water and sediment characteristics of main branch channel in recent years.It next constitutes a boundary condition by selecting flow and sediment data of 1992,2002,2004,to conduct numerical simulation research.Then,it mainly comparatively analyzed the variation of erosion-deposition,flood and dry season water level,depth of channel and utilization of point bar before and after the implementation of those regulations.In the end,it concluds that those regulation projects can play a very good effect on controlling dry season water level,maintaining navigable depth,improving waterfront landscape and improving the utilization ratio of point bar to promote the local marine economic development.