Abstract: In this paper,a model simulating the transformation of airflow passed through the water areas is presented,the model expressing the variations of meteorological elements over the waters is formula(44),(45) and over the downwind land is formula(48).The calculating results(continuing curves) and observational data(dots) of Dazong Lake in Xinghua County of Jiangsu Province are shown in fogure 1-5,which show that the theoretical curves are in good agreement with observations.