An investigation of dispersion of atmospheric pollutants taking into account the effect of terrain roughness on wind profiles
The spread of air pollutants in the atmospheric boundary layer is mainly conditioned by complex dynamic processes of the air mass movement and turbulent diffusion. Therefore, in meeting the challenges of monitoring and forecasting the ecological conditions of the atmosphere, first of all, it is necessary to take into account the air flow characteristics and the laws governing their changes. In this regard, one of the essential aspects in studying of the air flow structure is consideration of the dependence of the wind profile on the atmospheric stability and surface roughness. Thus, this work purpose is to study the influence of the vertical wind profile on the process of the spread of harmful emissions in the atmosphere based on the developed mathematical tools and GIS technologies. The results of computational experiments on determination the air flow characteristics at given heights and at various values of the ground-level wind speed and the roughness coefficient are presented in the paper, as well as the results of numerical calculations demonstrating the influence of the horizontal and vertical components of the wind speed on the distribution of suspended aerosol impurities in the considered region.