Determination of Atmospheric Diffusion Parameters

 

R.R. Draxler

 

Atmospheric Environment, Vol. 10, pp. 99-105, 1976

 

Abstract - Many methods used to predict the concentration of effluents form a continuous point source require the diffusion parameters Sy and Sz.  There are several methods available to determine them: various forms of power laws, averaging wind records, and graphs.  Based upon field experiments, a general equation is developed that approaches the correct theoretical limits.  This equation leads to a method for estimation of Sy and Sz, which gives satisfactory estimates in all cases except for vertical diffusion from ground sources during unstable stratification and vertical diffusion from elevated sources during stable stratification, presumably because of lack of vertical homogeneity. Alternate techniques are suggested for these cases.

 

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