水力发电学报2012，Vol.31Issue(5)：114-119,126,7.
岸滩崩塌影响的典型分汊型河道演变数值模拟
Numerical simulation of fluvial processes in a typical braided channel considering bank failure
摘要
Abstract
A 3-D mathematical model of braided channels with bank failure was developed for the Jianli reach of the middle Yangtze by using a 3-D flow and sediment transport module and a bank erosion module with composite structure. This model was verified with the in-situ observed data of bed deformation from Nov. 2003 to July 2006, and its calculations agree well with the measurements. It was applied to simulation of morphological changes in this reach under different bank erodibility conditions at the initial filling stage of the Three Gorges reservoir (TGR). Results demonstrate that at this stage, a decrease in sediment load brought forth river bed scour. As a result, failure of high-erodibility bank caused river bed degradation and lateral channel migration, while in the reaches of strong bank anti-scour ability, only bed degradation occurred, forming narrow and deep cross-sectional profiles. During the early filling of the TGR, the right branch of Jianli reach has remained as the main channel.关键词
河流动力学/监利河段/分汊型河道/岸滩坍塌/三峡工程/三维水沙数值模拟/岸滩抗冲性Key words
river dynamics/Jianli reach of the middle Yangtze River/braided channels/bank erosion/Three Gorges Project/three-dimensional mathematical model/bank anti-scour ability分类
建筑与水利引用本文复制引用
假冬冬,邵学军,张幸农,陈长英,应强..岸滩崩塌影响的典型分汊型河道演变数值模拟[J].水力发电学报,2012,31(5):114-119,126,7.基金项目
水沙科学与水利水电工程国家重点实验室开放基金资助课题 （）
国家973计划资助项目 （）
国家自然科学基金资助项目 （）
流域水循环模拟与调控国家重点实验室开放研究基金资助项目 （）
