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中文摘要：
以监利河段为例，针对弯曲河段复杂的地形和河势，基于移动坐标的计算原理，建立移动坐标下的平面二维水沙数学模型,通过在泥沙运动方程中增加横向输沙项，对该模型进行扩展，使其能较好地模拟弯道环流的横向输沙效应,借助土力学中边坡稳定性理论，对河岸崩塌变形进行数值模拟．通过对该河段水流泥沙运动过程及河床演变过程的复演结果分析，表明该模型不仅能够模拟该河段水流运动规律，而且能模拟河道的崩岸．
英文摘要：
Taking the Jianli reach for examples, a 2-D flow and sediment mathematical model under the moving mesh is established based on the evolution character of meandering channel . An additional term reflecting the transverse sediment transport due to secondary current is added to the existing mathematic model; so that the extended model is more suitable to simulate the deformation of river bends. It also uses theory of slope stability of soil mechanics to simulate river bank failure and deformation. The results show that the model can not only be used to simulate the deposition and erosion of bend reach, but also be used to calculate river bank failure.
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