Modeling the salt-dust aerosols distribution in the atmosphere, taking into account the soil erosion

Abstract

Abstract In the general case, when modelling the process of air pollution dispersion, it is necessary to take into account factors associated with the interaction of air mass with the underlying earth surface or wind erosion. The main purpose of this work is to study the factors affecting the amount of particulates carried upward from the soil into the air due to wind erosion. The study of this aspect is very relevant for the analysis of environmental situation in the Aral region of Uzbekistan. The major share of harmful substances emission in Aral Sea region is undertaken by dust, salts and toxic chemicals blown up from dried bottom of the Aral Sea. Thus, in mathematical modelling of atmospheric dispersion process, it is necessary to take into account the physic and mechanical properties of the particles and basic forces acting on them. In the paper there are presented certain numerical calculations for studying the process of soil erosion depending on the air mass velocity of the atmosphere, the size and density of particles, and the acting forces. The basic forces that play a significant role in the process of soil erosion were determined by carried numerical calculations.