钱塘江七格弯道段河势演变对控导丁坝的响应  

Response of Fluvial Processes of Qiege River Bend in the Qiantang Estuary to Spur Dikes Group

作　　者：史英标[1,2] 杨元平[1] 程文龙[1] 

机构地区：[1]浙江省水利河口研究院,浙江杭州310020 [2]浙江大学海洋学院,浙江杭州310058

出　　处：《浙江水利科技》2014年第5期13-18,共6页Zhejiang Hydrotechnics

基　　金：水利部公益性行业科研专项经费资助项目(201101056);浙江省重点科技创新团队建设项目(2010R50035)

摘　　要：钱塘江七格弯道位于河口段上游七堡～七格河段,左岸布有长短不一的8座控导丁坝以控制河势。该河段河床演变既受径流和潮流两方面动力的影响,也与控导丁坝的作用密切相关,水沙运动和河床演变十分复杂。利用钱塘江河口实测水文地形资料进行分析,得到了该河段河床年内“洪冲枯淤”,年际“丰冲枯淤”,主槽深泓线位置受控导丁坝群作用在现存丁坝和残坝坝头一线周期性摆动的规律。据此建立了二维全耦合动床数学模型,在复演河床冲淤及河势变化规律的基础上,探讨了该河段河势摆动与控导丁坝作用的关系。The river bend of Qiege is located at the upstream of river reach from Qiebao to Qiege in the Qiantang Estuary, and there are eight spur dikes in the left bank in order to control the river regime. The fluvial processes of this river reach is affected not only by two aspects of the runoff and tidal dynamics, is also related closely with the role of spur dikes group. Therefore, the water flow and sediment transport and river bed deformation are very complicated. Based on the analysis of the characteristic of hydrology, sediment and development of riverbed, the law of fluvial processes for the river reach was obtained in the paper. On this basis, 2D whole coupled movable bed mathematical model has been established, and the measured data of the river regime change was reproduced. Finally, the relationship between the river regime swing control and spur dikes was discussed by means of this model, and the results can be used as a reference for the river reach regulation and shorehne utilization.

关 键 词：河势摆动 控导丁坝 动床数学模型 七格弯道段 钱塘江河口 

分 类 号：TV147[水利工程—水力学及河流动力学]