采用一个基于流体静力平衡的动力学诊断模式对大亚湾核电站厂址区域的气象场进行实际模拟 ,研究了复杂地形和下垫面对流场的动力和热力作用。数值实验表明 :模式能很好地模拟中尺度局地环流的基本特征和变化规律。在模拟气象场的基础上 ,利用MonteCarlo多源模式计算了污染物的时空分布和干湿沉积量。模拟结果显示 :模式很好地反映在海陆风和山谷风环流及排牙山影响下大气参数的非均匀性和非平稳性 A dynamic diagnosis model based on hydrostatic equilibrium was used to simulate the meteorological field in the site of Daya Bay Nuclear Power Station. The dynamic and thermal effects of complex terrain and underlying surface on the flow field were studied. Numerical experiments show that the model can well simulate the basic characteristics and variation of mesoscale local circulation. Based on the simulated meteorological field, the temporal and spatial distribution of pollutants and the amount of wetting and drying deposits were calculated by MonteCarlo multi-source model. The simulation results show that the model is well reflected in the heterogeneity and non-stationary atmospheric parameters under the influence of sea breeze and valley wind circulation and Pai Yayanshan