One Aspect of Environmental Engineering – Modelling the Air Pollution Effects using Advection-Diffusion

Abstract

This paper aims to contribute to the development of appropriate and sustainable solutions that enhance response readiness and facilitate the identification, processing, investigation and reporting of fire and explosion incidents. Additionally, it seeks to address the overall reduction and control of pollution levels. From this perspective, the elements and cases of pollutant emission factors are analysed concerning spatial distribution, mechanisms and elimination time. The concentration of air pollutants can be described by the advection- diffusion equation, a second-order partial differential equation (PDE). This approach exemplifies an interdisciplinary method, taking into account the atmospheric boundary layer, including wind limitations, daily temperature variations and the presence of eddies. To analyse the analytical and numerical solutions to the diffusion equation, a two- dimensional, time-independent case with a continuous terrestrial line source of pollutants was selected. The results, obtained using freely chosen parameters and appropriate boundary conditions determined according to literature sources, are presented in both code and graphical form. Modeling is recognized as an important complementary tool and can be applied to both short-term and long-term planning. In particular, this study investigates the potential of a numerical scheme for modeling advection, using the analytical solution as a reference within defined boundary conditions. This approach demonstrates its applicability in tracking diffusion processes caused by accidents or natural events, where air pollutants disperse from one area to another over time.