The Validation of a Simple Gaussian Dispersion Model for Determining Odour Emission Rates from Area Sources

Abstract

AbstractThe accuracy of dispersion models is a widely debated topic. The goal of this research was to assess If the odour emission rates (OER) predicted using a simple Gaussian model were comparable to the more intensive and expensive wind tunnel‐based odour measurement technique. A Gaussian dispersion model (STINK) was used to determine odour emission rates from piggery ponds. These values were then compared to those measured simultaneoirsly on the pond sugaces using a wind tunnel, and analysed using dynamic olfactometry. Results of linear regressions showed a moderate relationship for two of the three seasons studied, and a very good relationship for the other season studied. Overall, the model showed a good correlation between calculated downwind, and calculated on‐pond, odour emission rates. The use of the STINK model shows promise as an alternative to the inore labour‐intensive direct emission rate measurement technique.