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引用本文:李术军,刘树坤,李锦秀.西山遮挡对滇池风生流影响的数值模拟.湖泊科学,1998,10(1):5-10. DOI:10.18307/1998.0102
Li Shujun,Liu Shukun,Li Jinxiu.Numerical Simulation of Influence of Hilly Relief on Wind..Driven Current in Dianchi Lake. J. Lake Sci.1998,10(1):5-10. DOI:10.18307/1998.0102
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西山遮挡对滇池风生流影响的数值模拟
李术军, 刘树坤, 李锦秀
中国水利水电科学研究院水力学研究所, 北京 100038
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、细致地反映出了滇池水体流动的总体特征。
关键词:  风场  遮挡  滇池  风生流  数值模拟
DOI:10.18307/1998.0102
分类号:
基金项目:云南省地方自筹资金
Numerical Simulation of Influence of Hilly Relief on Wind..Driven Current in Dianchi Lake
Li Shujun, Liu Shukun, Li Jinxiu
China Institute of Water Resources and Hydropower Research, Beijing 100038
Abstract:
When simu1ating the wind-driven flow of a lake.the wind field above the water surface is akey factor that influences the precision.The complicated terrains around a lake.such as moun-talns, 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 micro-meteorologymodel 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 rea1 terrain conditions is simulated with a 2D wind-driven current model.and 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 wind—driven flow in Dianchi Lake is simulated after obtaining the local wind field according with realmeteo rological characters of lake area from the meteorology model, the simulation result can aCCU.rately reflect the general character of water movement in Dianchi Lake.
Key words:  Wind field  shelter  Dianchi Lake  wind-driven current  numerical simlation
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