长江中游监利河段崩岸数值模拟  

Research on numerical model of river bank failure at Jianli reach of middle reaches of Yangtze River

作　　者：屈文谦[1] 闫立艳 张小峰[1] 段光磊[1,2] 胡春宏[3] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]长江水利委员会荆江水文水资源勘测局,湖北荆州434000 [3]中国水利水电科学研究院,北京100044

出　　处：《武汉大学学报（工学版）》2009年第2期158-162,177,共6页Engineering Journal of Wuhan University

基　　金：杰出青年科学基金资助项目(编号:50725930);国家自然科学基金资助项目(编号:50579054)

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.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.

关 键 词：监利河段 平面二维水沙数学模型 横向输沙 移动坐标 河岸崩塌 

分 类 号：TV143[水利工程—水力学及河流动力学]