Abstract
The properties of the Gaussian plume equation have led many industrial designers to plan their stack system so that ambient pollutant concentrations are reduced to levels considered safe from the standpoint of undesirable effects. This paper demonstrates the characteristics of worst‐case maximum air concentrations due to an elevated point source diffusing over flat terrain. The critical wind speed, critical plume rise and critical downwind distance are obtained from the Gaussian plume model. The analysis is based on the assumption that dispersion parameters σy and σz are functions of downwind distance and atmospheric stability. The proposed methodology should be especially useful in applications in design of stacks, air quality management and air pollution episode control planning.
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