Model Validation Kit - Status and Outlook

Abstract and conclusions

Paper presented at the 5th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purpose in Rhodes, May 1998

The entire manuscript is available in Acrobat (PDF) format (180 K).

H. R. Olesen   
National Environmental Research Institute (NERI), P.O. Box 358, DK-4000 Roskilde, Denmark, e-mail


Over the past few years, the so-called Model Validation Kit has been the basis for much work on evaluation of atmospheric point source dispersion models. The kit has recently been enhanced with a supplement which represents urban conditions (experimental data from Indianapolis, USA). A change of methodology is under consideration, based on the concept of near-centreline concentrations. The paper examines some consequences of such a change in methodology.


A change of methodology of the Model Validation Kit is under consideration. The proposed new methodology has attractions, but also poses many problems. As yet, many questions are not settled, so modellers who wish to use a "common currency" when evaluating their models should use the established Model Validation Kit.

On the other hand, in order for the new methodology to reach maturity, it should be tested by researchers willing to put an effort into some pioneering work.

This paper reports some results concerning the "exchange rate" between the two methodologies which can provide a background for decisions on standard methodologies. The future perspective is a version of the Model Validation Kit which also accommodates the NCC methodology in a satisfactory manner.

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