Various sources and types of pollutants in the atmospheric environment, Reynolds averaging,closure problem, atmospheric diffusion, types of boundary conditions for modelling dispersion. soln of diffusion equation for instantaneous and continuous sources; dispersion from a grond/ elevated sources; long and short range dispersion, removal mechanism; dry and wet deposition, chemical removal, atmospheric surface boundary layer, similarity theory. Wind rose, dispersion parameters and plume rise. Gaussian and box models, optical stack height. case studies for the despersion of pollutants. |