大沽河河道整治方案的准三维数值模拟优化  

Simulation and optimization of quasi-3D hydrodynamic numerical model of channel regulation scheme for Dagu River

作　　者：杨静[1] 黑鹏飞[1] 张潆元[1] 冯金朝[1] 周刚[2] 方红卫[3] 

机构地区：[1]中央民族大学生命与环境科学学院,北京100081 [2]中国环境科学研究院环境基准与风险评估国家重点实验室国家环境保护河口与海岸带环境重点实验室,北京100012 [3]清华大学水利水电工程系,北京100084

出　　处：《水利水运工程学报》2017年第6期37-44,共8页Hydro-Science and Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07505-005)

摘　　要：大沽河口在河流长期水沙动力作用下,形成当前特有的河道形态。然而近年来大沽河口下游河道逐渐从河流主导型演变为潮汐主导型,河道形态已不再适应当前水沙动力条件。提出适用于当前水沙动力条件的新方案,并基于所建立的准三维河流动力模型,进一步对河道整治所涉及的不同闸坝位置、堤防形态、橡胶坝宽度、码头断面形态进行模拟,得出最优的河道整治方案。研究结果表明,当河口水沙动力条件变化较大时,可以通过设计适应于新水沙动力条件的全新河道形态,利用准三维模型进行优化,解决河道长期淤积和防洪问题。The geomorphology of the Dagu River mouth is formed by the interaction of the river hydrodynamics and sediment. But the downstream of the Dagu River has gradually transformed from rive-dominated to tide-dominated in recent years. The original river morphology is no longer suitable for the hydrodynamics and sediment conditions. In this paper, new regulation schemes are proposed. And a quasi-3D numerical river dynamics model is used to simulate the water flow and sediment dynamics of the Dagu river in the different schemes. Effects of the location of dike, the shape of river bank, the width of rubber dam and the shape of t wharf section are all studied separately. The best regulaton scheme is then selected, with the least flood risk and minimum sediment fluvial volume, which can reach the standards of 50-year flood control. The research results suggest that for those rivers with large change of hydrodynamics and sediment, new regulation schemes should be designed and the quasi-3D numerical model can be used in the schemes optimizing process.

关 键 词：大沽河 河道整治 准三维模型 河流动力学 

分 类 号：TV85[水利工程—水利水电工程]