中文摘要：

基于南四湖100m精度的DEM地形数据，采用平面二维水动力学模型，研究了南四湖调水情景下不同风向的水动力特性。研究表明，在调水情景下，南四湖的水流流动基本沿湖泊内主槽区域从水流注入口向出水口方向流动。下级湖的平均流速在0．017～0．02m／s之间，最大流速在0．277～0．295m／s之间；上级湖的平均流速在0．018～0．02m／s之间，最大流速在0．164-0．168m／s之间。上、下级湖湖流形态以东东北风和东风风向下最为凌乱。

英文摘要：

In order to evaluate the environmental impact of pollutant control around the Nansihu Lake, the hydraulic characteristics of Nansihu Lake under diversion condition with different winds have been studied by 2-D hydraulic model based on 100m DEM topography datum. The results show that water in Nansihu Lake mainly flows from the inlet to the outlet via main channels. It has been found that the average velocities of down lake are from 0. 017 to 0. 02 m/s and the maximum velocities are from 0. 277 to 0. 295 m/s,while the average velocities of upper lake are from 0. 018 to 0. 02 m/s and the maximum velocities are from 0. 104 to 0. 168 m/s. The turbulent characteristics occur more obviously with East-North-East and East wind directions.