A model evaluation exercise for non-buoyant releases from continuous point sources

摘要

A model of the dispersion of pollutants released from a continuous point source into the atmospheric boundary layer is suggested.For this model and for that of Gryning et al.(1987),the predicted normalized crosswind integrated concentrations are compared with observational data.The data obtained data.The data obained in diffusion experiments with a non-depositing tracer,in non-buoyant releases carried out at Copenhangen(Denmark),Cabauw(The Netherlands),Hanford(USA)and Lillestrom(Norway)have been used.The former two experiments were elevated releases during near neutral and unstable conditions;the latter two were near surface releases during near neutral and stable conditions were elevated releases during near neutral and stable conditions;The comparison is done with each dataset and with the full database.Statisticalmeasures and techniques of model evaluation are obtained andapplied.The behaviour of residuals with some meteorologicalparameters is studied.The overall agreement between estimated and measured concentrations is satisfactory.The models have quite simlar performances.