Numerical Modelling of Dust Propagation in the Atmosphere of Tbilisi City: The Case of Background Eastern Fresh Breeze

Authors

  • Vepkhia G. Kukhalashvili
  • Natia G. Gigauri
  • Aleksandre A. Surmava
  • Demuri I. Demetrashvili
  • Liana N. Intskirveli

Keywords:

numerical modeling, Tbilisi dust pollution, diffusion, strong wind.

Abstract

Dust propagation at Tbilisi city territory in case of strong background eastern winds is studied using the 3D regional model of atmospheric processes evolution and integration of the equation of admixtures transfer-diffusion. It is shown that dust propagation substantially depends on both the terrain of city and surrounding territories and on the magnitude and direction of background wind velocity. It is obtained that dust propagation process in case of strong background wind is characterized by time variation and spatial distribution peculiarities. High pollution zones as well as the reasons of their time variation and dust accumulation are determined. It is established that a high pollution level (1.2-2.0 MAC) is obtained in the time interval from 3 p.m. to 9 p.m. in the up to 50 m thick lower part of surface layer of the atmosphere.  

References

Kukhalashvili V.G., Kordzakhia G.I.,Gigauri N.G. , Surmava A.A., Intskirveli L.N. Numerical Modelling of Dust Propagation in the Atmosphere of Tbilisi City: The Case of Background Eastern Gentle Breeze. Journal of the Georgian Geophysical Society, ISSN: 1512-1127, Physics of Solid Earth, Atmosphere, Ocean and Space Plasma, v. 23(1), 2020, pp. 46 -50.

Surmava A., Intskirveli L., Kukhalashvili V., Gigauri N.. Numerical Investigation of Meso- and Microscale Diffusion of Tbilisi Dust. Annals of Agrarian Science, 18, No. 3, 2020 (In print).

Gigauri N.G., Gverdtsiteli L.V., Surmava A.A., Intskirveli L.N. Numerical Simulation of Industrial Dust Distribution in the Territory of Zestafoni, Georgia. WIT Transaction on Ecology and Environment, 230, 2018, pp. 119-128. Doi:10.2495/AIR1180111.

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How to Cite

Kukhalashvili, V. G., Gigauri, N. G., Surmava, A. A., Demetrashvili, D. I., & Intskirveli, L. N. (2020). Numerical Modelling of Dust Propagation in the Atmosphere of Tbilisi City: The Case of Background Eastern Fresh Breeze. JOURNAL OF THE GEORGIAN GEOPHYSICAL SOCIETY, 23(1). Retrieved from https://openjournals.ge/index.php/GGS/article/view/2653