A nonlinear 3-D model is developed to study the influence of topography and water-land distribution on the local boundary layer, including the effects of orographic fluctuation and phase change of water.The horizontal and vertical eddy viscosity and diffusion of heat and vapor are represented by parameters based on K theory, in which the coefficients of turbulent exchange are regarded as a functicai of surface roughness, altitude, atmospheric stability and stress tensor.The surface features and physical processes on the surface determine the local environment of the global climate background.In this model,underlying surface differences in hilly,plain and lake areas in orographic, altitude, surface roughness, radiation, evaporation and heat flux are considered.The equation of heat balance on the surface coupled with the governing equations in boundary layer is also taken into account.