G. Schauberger et al., Diurnal and annual variation of the sensation distance of odour emitted bylivestock buildings calculated by the Austrian odour dispersion model (AODM), ATMOS ENVIR, 34(28), 2000, pp. 4839-4851
The diurnal and annual variation of distances for different odour threshold
s is investigated by the dynamic Austrian odour dispersion model (AODM) con
sisting of an emission module, a dispersion module, and a module to calcula
te instantaneous odour concentrations. The effect of daily variations in od
our production, ventilation rates and indoor air temperature are included i
n impact assessments. The ambient half-hour odour concentrations calculated
by a regulatory Gaussian plume model are transformed to instantaneous valu
es representative for the duration of a single breath by an attenuation fun
ction decreasing the peak-to-mean ratio with increasing wind velocity, stab
ility, and distance from the source. The resultant distances for different
odour thresholds and their dependence on meteorological parameters are inve
stigated and discussed in detail, focussing on the distance for the detecti
on limit, 1 OU m(-3), the so-called sensation distance. The results suggest
a stronger dependence of the sensation distance upon variation in meteorol
ogical conditions than diurnal and annual variations in odour emission rate
s. (C) 2000 Elsevier Science Ltd. All rights reserved.