An analytical model for point source pollutants in an urban area with mesoscale and removal mechanisms

Abstract

Aim: Urbanization, rapid industrialization, and related anthropogenic activities are the main reasons for air pollutant emissions and poor air quality. Continued deterioration of air quality in urban areas requires effective measures to control air pollution. The purpose of developing a model is for a better understanding the physical, chemical, and dynamic properties of air pollution and meteorology. Materials and Methods: In this work, an analytical approach has been used to analyze the diffusion of air pollutants emitted from point sources is presented. This article reports the method of solving three-dimensional atmospheric diffusion equation using the Fourier transform technique, variable separable method, and series solution to obtain analytical solution. Results: The present work focuses on the effect of dry deposition and wet deposition on the concentration of primary impurities. The concentration of primary impurities decreases when the removal rate of dry and wet deposition increases with respect to height and distance. Conclusion: The focus of this research article is to learn the effects of removal mechanisms such as dry and wet deposition of primary pollutants. It is found that the contaminant concentrations are close to point sources and gradually decrease toward nonsource areas due to diffusion and removal mechanisms in an urban area.

Keywords

• advection–diffusion equation
• atmospheric impurities
• dry deposition
• urban heat island
• wet deposition