Comparison of four setback models with field odour plume measurement by trained odour sniffers

摘要

Odour plumes were measured downwind of two swine operations located in a flat area of southern Manitoba by 15 trained human odour sniffers at distances of 100, 500, and 1000 m from the farms, Regression models were derived from the field odour plume measurement data to predict the downwind odour intensity. Four setback distance models that have been used in North America were used to determine the required setback distances for the two farms, i.e., the Ontario MDS-II, Alberta MDS, Purdue, and Minnesota OFFSET models. The results of these setback models and the regression models were then compared. Alberta MDS, Purdue, and Minnesota OFFSET models are considered to be adequate in predicting setback distances as their predicted setbacks fall in the ranges derived by the regression models. The setback distances determined by the Ontario MDS-II model appeared insufficient, and the model could not account for the effect of covering manure storage, Setback distances determined by the OFFSET model for various odour annoyance free frequencies essentially covered the range of distances calculated by the Purdue and Alberta models and by the regression models. Hence, OFFSET is recommended as the preferred setback model.