Comparison Of Modelled And Measured
Concentrations For 108 Locations In Flanders
Author(s)
C. Mensink, A. Colles, R. De Fre and W. Swaans
Abstract
Over the period October 1997 - November 1998, NHg concentrations were
measured at 108 locations in Flanders using diffusion tube samplers. The
measurement averaging time was three to four weeks allowing the representation
of temporal agricultural phenomena like periods of manure application, maize
plantation and periods of prohibition of manure application. The results of the
measurement campaign were compared with NH] concentrations obtained by the
Operational Priority Substances (OPS) model. Model results show
concentrations that are systematically lower than the measurements, especially in
areas with high emissions. The statistical analysis shows a better comparison in
summer time (full emission load) than in wintertime (no manure applications). A
significant improv
Keywords
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