定常风场下的太湖风生流水动力特征研究

太湖的主要流动类型为风生流，本文采用数学模型模拟了四种定常风场作用下的太湖风生流水动力特征，总结了风向对太湖风生流分布的影响。研究结果指出：东南风与西北风作用下太湖主湖区存在西部环流、中部环流和北部环流三个大尺度环流，北风与南风作用下太湖主湖区仅存在西部环流和中部环流两个大尺度环流。东南风和西北风作用下，太湖北部竺山湾东北部、梅梁湾东南部和西北部及贡湖湾东北部存在大尺度环流。东风与南风作用下，竺山湾西部、梅梁湾东南部和中部南北两岸及贡湖湾东部存在大尺度环流。定常东南风作用下，太湖表面流向与风向相同，底层流向与风向相反，流向拐点一般出现在相对水深hc=0.8 处。

Hydrodynamic characteristics of wind-induced flow in Taihu lake under steady wind fields

The main flow type in Taihu lake is wind-induced flow.This paper uses mathematical models to simulate the hydrodynamic characteristics of Taihu lake''s wind-induced flow under the influence of four steady wind fields, and summarizes the impact of wind direction on the distribution of wind-induced flow in Taihu lake.The results show that there are three large -scale circulations in the main lake area of Taihu lake under the influence of southeast and northwest winds: the western circulation, the central circulation and the northern circulation.Under the influence of north and south winds, there are only two large-scale circulations in the main lake area of Taihu lake: the western circulation and the central circulation.Under the influence of southeast and northwest winds, large-scale circulation exists in the northeast of Zhushan bay in northern Taihu lake, large -scale circulation exists in the southeast and northwest of Meiliang bay, and large-scale circulation exists in the northeast of Gonghu bay.Under the action of east and south winds, there are large-scale circulations in the western part of Zhushan bay, large-scale circulations in the southeast and central parts of Meiliang bay, and large-scale circulations in the eastern part of Gonghu bay.Under steady southeast wind filed, the surface flow direction of Taihu lake is the same as the wind direction, while the bottom flow direction is opposite to the wind direction.The turning point of the flow direction generally occurs at the relative water depth hc = 0.8.