Vol. 4, issue 11, article # 14

pdf Kondratyev K. Ya., Khvorost'yanov V. I., Kotova O. P., Cherkasova N. I. A mathematical simulation of accidental emissions as a method of improving optical monitoring of atmospheric pollution. // Atmospheric and oceanic optics. 1991. V. 4. No. 11. P. 839-845.
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A routine mathematical model of a contaminating specie spreading in the boundary atmospheric layer after accidental emission is developed for organizing an optimal network of optical monitoring of industrial emissions into the atmosphere, based on a solution of system of equations involving:
  1) equations of motion and turbulence energy budget for calculating the turbulence and wind modes;
   2) equations of temperature and moisture transfer, accounting for their diurnal time–behavior;
   3) equation of turbulent diffusion, describing transfer of a weightless passive contaminant for various scenarios of an accident; and,
  4) the heat equation in soil and equation of heat balance of a surface.
Numerical calculations have been performed and general features of the evolution of a contaminant cloud at different values of the geostrophic wind G and the degree of roughness z0 are investigated. The results are compared with those calculated according to the Gaussian model of a diffusive flow. It is shown that the developed numerical model enables one to describe, better than the Gaussian method, the fields of a contaminant spreading during a nonstationary emission after an accident for assessment of the influence of industrial plants on environment and the development of the system of protection measures. These results and a PC compatible model can be used for optimization of the network of optical sensing, their density and location for various scenarios of accidents.