Mathematical Model of Soil and Groundwater Contamination by Nitrogen Dioxide Taking Into Account the Factors Influencing the Diffusion Coefficient

The article considers the task of soil and groundwater contamination by harmful emissions of nitrogen dioxide from motor vehicles. The harmful emission concentrations measurement a mobile complex Sniffer4D Hyper-local Air Quality Analyzer is used. Based on these results, a mathematical model of diffusion of this harmful substance in the upper layers of soil and water resources taking into account the factors influencing the diffusion coefficient is proposed. As a result of the computations, the distribution of concentrations of soil and water contamination in the neighborhood of separate observation points has been built. Based on this model, a series of experiments investigated the process of diffusion of this harmful substance in the upper layers of soil for different soil moisture and for two types of soils. The obtained research results are fully consistent with the practical and theoretical results on the diffusion of gases into soils taking into account the factors influencing the diffusion coefficient.