A Quasi-3D Numerical Model of Wind-Driven Current in Taihu Lake Considering the Variation of Vertical Coefficient of Eddy Viscosity

Based on considering the variation of vertical coefficient from bottom to surface, a quasi-3D numerical model was put forward to calculate the wind-driven current, and was applied in Taihu Lake under steady and unsteady winds, respectively, the results were satisfactory. Comparitive studies showed that the influence of the variation of vertical coefficient of eddy viscosity along the water depth is little to the computation results of surface elevation, but it is great to the computation results of the velocity profile and the bed shear-stresses. Therefore, it is needed to consider the variation of vertical eddy viscosity coefficient to simulate the 3D wind-driven circulation in lakes for better simulation.