Vol. 18, issue 05-06, article # 12

Abstract:

To monitor and study of the urban air pollution by troposphere ozone, prognostic models of spreading pollution taking unto account schemes of secondary pollutant formation are proposed. Eulerian model of turbulent diffusion containing transport equation with description of advection, turbulent diffusion, and chemical reactions is used. In this work, three reduced kinetic mechanisms of secondary pollutant formation are approved and compared with observed data. A short-term forecast the urban weather is realized with the use of an one-dimensional unsteady model of atmospheric boundary layer. The following sources of primary pollution are considered: industrial and heat power stacks (point sources), vehicle emissions (linear sources), and large industrial area (area sources). The mathematical problem is solved with use of a finite volume method. One of the proposed models was applied to reveal the features of the urban air pollution by ozone and its precursors, to determine factors of pollution generation and destruction, to analyze the dynamics of diurnal ozone distribution for various seasons. Results of comparison of predictions and observations allow one to apply used models, which main advantage is high performance in forecasting of secondary air pollution distribution above urban regions.