All Rights Reserved. This software enhances the user's understanding of air pollution plume models by teaching literature and problems. Industrial effluents are discharged through smokestacks. The plume from the stack expands and mixes with ambient air. This mixing dilutes the effluent.
Wind speed affects the rate of mixing.
An increase in speed will increase the dilution. This will result in a lower downwind concentration, but the area contaminated will increase. Also, the more unstable the atmosphere, the greater the dilution. Turbulent diffusion causes the pollutants to become more dispersed. The plume experiences a horizontal and vertical movement.