摘要
对于湖泊风生流的模拟，湖面风场数据是决定精度高低的关键因素，而湖泊周围的山地等复杂地势常常引起湖面风速风向的不均匀分布．致使湖流流态因地形因素而变化较大本文建立了一个适合于湖泊区域的中小尺度三维过山气流数值模型，用以计算受山体遮挡的风场参数，结合沿水深平均的二维湖泊风生流数值模型模拟了实际地形条件下的滇池风生流，并与均匀风作用下的湖流状态及人工构造风场作用下的风生流流态进行比较结果表明：由气流模型获得符合湖区实际气象特点的局地风场后计算滇池风生流，数值模拟结果更加准确。
When sirnulating the wind-driven flow of a lake, the wind field above the water surface is a key factor that influences the precision. The complicated terrains arount a lake, such as mountains, often result in unsymmetrical distribution of wind velocity and direction above lake surface,so water flow pattern must be changed by the terrains. In this paper, a 3-D mlcro-meteorology model for lake scale is built up to Compute local wind affected by the shelter of hilly terrains.Based on this, the flow pattern of Dianchi Lake under real terrain conditions is simulated with a 2D wind-driven current model, nnd the flow pattern in this case is compared to the flow fields under uniform wind and artificially modified wind respectively. The result shows that if the winddriven flow in Dianchi Lake is simulated after obtaining the local wind field according with real meteorological characters of lake area from the meteorology model, the simulation result can accurately reflect the general character of water movement in Dianchi Lake.
出处
《湖泊科学》
EI
CAS
CSCD
1998年第1期5-10,共6页
Journal of Lake Sciences
基金
云南省地方自筹资金
关键词
风场
遮挡
滇池
风生流
数值模拟
湖泊
Wind field, shelter, Dianchi Lake, wind-driven current, numerical simlation
