Numerical investigation of the effects of aquatic plants on wind-induced currents in Taihu Lake in China
作者机构：School of Ocean Science and Environment Dalian Ocean University Dalian 116023 China National Marine Environmental Monitoring Center Dalian 116023 China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116023 China
出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)
年 卷 期：2019年第31卷第4期
页 面：778-787页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：Project supported by the National Nature Science Foundation of China (Grant No. 51779039, 51879028) supported by the Wetland Degra-dation and Ecological Restoration Program of Panjin Pink Beach (Grant No. PHL-XZ-2017013-002) the Fund of Liaoning Marine Fishery Department (Grant No. 201725).
主 题：Finite volume method Roe solver shallow lake wind-induced current aquatic plant
摘 要：Shallow lakes are an important part of the earth s water circulation system, and many factors may impact the evolution of the lake water circulation, including the wind, the topography, the human activities, and the aquatic plants. This paper proposes a depth-averaged 2-D hydrodynamic model to investigate the interaction of the wind-induced current and the aquatic plant in the lake. The model is based on the generalized shallow water equations solved by an explicit finite volume method with unstructured triangular grids. The drag force of the vegetation is considered into the momentum equations as the source term. Remote sensing techniques are applied to evaluate the aquatic vegetation in the Taihu Lake, China, based on Landsat TM satellite images. The study model is then used to simulate the characteristics of the wind-induced currents in the Taihu Lake, without and with the vegetation effects. The simulation results are in good agreement with the field measurements, demonstrating that the aquatic plants significantly affect the magnitude of the velocity and the flow circulation induced by the wind in the Taihu Lake. In addition, a sensitivity analysis reveals that the plant parameters (the density and the drag force coefficient) are significant factors influencing the velocity and the structure of the currents in the Taihu Lake.
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