بررسي اثر كوهستان بر روي كيفيت هواي تهران بزرگ

Study of Mountain Effect on Air Quality of Greater Tehran

A mesoscale model of the surface wind distribution over complex terrain, is used The model is based on thermally induced mechanism of the slope valley wind system. It is developed to simulate temporal as well as geographical variations of the wind field The modelʹs equations incorporate the effects of nonunifonnitics in surface temperature, roughness, and terrain elevation. Initial integrations of the model equruons have been made to simulate flow patterns over Greater Tehran (Capital of I.R. of Iran) area and the vicinity during the occurrence of an upslope wind. The initial conditions are also assumed to be calm and cloudless. This study has extensive applications in the dispersion of pollution, wind energy and convergence activities. Furthermore, the model does not require very much computer time and speed.