terrain coefficient
1.A new method is proposed for the effective roughness length (ERL) in heterogeneous terrain based on the principle of equalization of momentum or heat fluxes calculated by the drag coefficient parameterization scheme used in the ECMWF numerical model.
2.Based on the hypothesis of similarity for local turbulent characteristics in planetary boundarg layers and the principle of dimensional analysis, and using statistical form of the vertical vortex diffusion coefficient K as well as Ekman spiral wind profile, at vertical dispersion pattern in the 100 km range is derived by numerical analysis method. It is applicable to both flat uniform land and complex terrain.
