Estimation of the parameter of aerodynamic roughness of the underlying surface by the function of distribution of pollutant substances in the atmospheric boundary layer

摘要

To solve the problems of meteorology, ecology, energy, a special interest is caused by the profile of wind speed and thecoefficient of turbulent diffusion, which essentially depend on the terrain and the atmosphere condition. In the existingsemiempirical models for the wind profile and turbulent diffusion, the aerodynamic effects, caused by the presence ofinhomogeneities, are accounted by fitting parameters. Among them the most well-known parameter is the roughness ofthe underlying surface. Today the data given in the literature is about this parameter, measured for comparatively simpleterrain and stable conditions of the atmosphere. The averaged values of the aerodynamic roughness parameters of theunderlying surfaces that differ significantly in the degree of inhomogeneity were obtained in the work. Estimations weremade using the pollutants distribution functions in the atmospheric boundary layer and an analytical solution of thediffusion-convective transport equation for a point high-altitude source. The distribution functions for coal-fired TPPemissions are measured by the moss-biomonitor method. Estimates obtained for a relatively homogeneous underlyingsurface are in good agreement with the data given in the literature.