Assessment and Verification of Different Types of Dispersion Models in Complex Terrain

In connection with the evaluation and selection of calculational models, which are well suited for real time dispersion simulation of airborne radioactivity in complex terrain, 10 dispersion models of 4 different types are evaluated, compared and verified by the analysis of 2 different experimental episodes of the tracer experiment SIESTA. The result of the analysis had to be assessed with respect to the performance of the models, which was done qualitatively by visualization and quantitatively by statistical analysis as well as by soft-/hardware characteristics. Specific conclusions had to be drawn with respect to the final selection of a dispersion model operational in complex terrain and under real time conditions. 2 conditions which still present a real challenge for modern scientific computing. More general conclusions are drawn.