3D Numerical Simulation On Wind-driven Flow, Wind Wave And Sediment Transportation Of Taihu Lake

In recent years, the water quality of shallow lakes is becoming worse and worse. In shallow lakes, the dynamic release plays an important role in water pollution, so presently it is widely concerned. What's more, dynamic release is caused by the re-suspending sediment which is at the bottom of the lake. So the spatial distribution of sediments in lakes must be realized firstly and then the dynamic release which is caused by the disturbance of wind-driven flow-wave can be accurately calculated.After consulting plenty of literatures about numerical simulation of shallow lakes, MOHID model is selected to simulate the wind-driven flow of Taihu Lake. On this basis, SWAN model is coupled into MOHID. With this coupled model, the sediment transport of Meiliang Bay is simulated with the wind-driven flow and with the wind-driven flow-wave. In 3D model, the horizontal momentum equations are discretized by the finite volume method, and the sigma coordinate is applied for vertical direction, so shallow water regions are well described.In this paper, the results about wind-driven flow simulation of Taihu Lake agree well with the previous researches. The principle of the sediment transport of Meiliang Bay is well described by the sediment simulation. The computational results can be helpful for further studying of dynamic release.