Numerical Modeling of Dust Propagation in the Atmosphere of a City with Complex Terrain. The Case of Background Eastern Light Air

Abstract

Micro-scale processes of dust distribution in the city of Tbilisi with very complex topography are modeled using a 3D regional model of atmospheric processes and numerical integration of the transport-diffusion equation of the impurity. The Terrain-following coordinate system is used to take into account the influence of a very complex relief on the process of atmospheric pollution. Modeling is carried out using horizontal grid steps of 300 m and 400 m along latitude and longitude, respectively. Cases of the stationary background eastern light air are considered. In the model, motor transport is considered as a nonstationary source of pollution from which dust is emitted into the atmosphere. Modeling of dust micro-scale diffusion process showed that the city air pollution depends on the spatial distribution of the main sources of city pollution, i.e. on vehicle traffic intensity, as well as on the spa

PM2.5 and PM10 in the Atmosphere of Kutaisi City

“…Routine observations have been made in Tbilisi, Rustavi, Kutaisi and Batumi. Some results of this monitoring have been analyzed in the works [9][10][11][12][13][14][15][16][17][18][19][20][21]. Summarized results of studies of air pollution in Kutaisi and its surroundings by particulate matter PM2.5 and PM10 are presented below.…”

Statistical Characteristics of Monthly Mean and Annual Concentrations of Particulate Matter PM2.5 and PM10 in Three Points of Tbilisi in 2017-2022

“…In recent years, work has been actively carried out on numerical modeling of dust distribution in various regions of Georgia, taking into account external conditions (wind, etc.) [54][55][56][57][58][59][60][61]. A comparative analysis of aerosol air pollution in Tbilisi and Kutaisi was carried out [62].…”