Comparison of numerical street dispersion models with results from wind tunnel and field measurements

Numerical dispersion models developed and validated in different European c ountries were applied to data sets from wind tunnel and field measurements. The comparison includes the Danish Operational Street Pollution Model (OSP M) and the microscale flow and dispersion model MISKAM. The latter is recom mended for application in built-up areas in the draft of the new German gui deline VDI 3782/8. In a first step the models were applied to simplified st reet configurations. Different parameters as length and height of adjacent buildings and the angle of the incoming flow were varied. The results were compared to recent wind tunnel measurements. In a second step the models we re applied to two extensively investigated field data sets from Jagtvej, Co penhagen and Gottinger Strasse, Hannover. Intensified and more transparent and accessible validation procedures would be helpful for the thorough user .