基于滩岸变形的游荡型河段崩岸计算模型研究  

Study of calculation model of bank collapse of wandering rivers based on bank deformation

作　　者：冀建疆[1] 邹朝望 闵志华[3] 

机构地区：[1]水利部水利水电规划设计总院,北京100120 [2]湖北省水利水电规划勘测设计院,湖北武汉430064 [3]重庆水利电力职业技术学院,重庆永川402160

出　　处：《人民长江》2014年第16期94-97,共4页Yangtze River

基　　金：水利部科技推广项目(TG1316);湖北省水利重点科研课题(HBSLKY201403)

摘　　要：针对游荡型河道的演变特征,将主流摆动和河岸崩塌的计算模式与平面二维水动力学模型相结合,建立了游荡型河段滩岸崩塌的计算模型。介绍了滩岸横向冲刷距离计算和河岸稳定性分析的方法。描述了游荡型河道水沙数学模型计算中的边界处理方法、河岸横向冲刷与崩塌过程计算和河岸形态修正的主要步骤。该模型有效解决了崩岸尺度与河宽尺度不匹配的问题,能够模拟河岸后退或淤长过程。According to the evolution characteristics of wandering rivers, by the combination of mainstream swing and bank collapse calculation mode and 2D hydrodynamic model, the calculation model of bank collapse in wandering river reaches was es-tablished. The methods of bank transversal scouring calculation and stability analysis were introduced. The main steps including the boundary condition treatment, calculation of transversal scouring and collapse process of the bank and bank morphology modi-fication were described. By the model, the mismatching in the scales of bank collapse and river width can be tackled effectively and the deposition and erosion process of bank can be simulated.

关 键 词：水沙数学模型 滩岸变形 河岸冲刷 游荡型河道 

分 类 号：TV14[水利工程—水力学及河流动力学]