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.