Lagrangian Model Simulation of 3-D Concentration Distribution in Complex Terrain

Most of the up to date dispersion simulations are discussed using ground level concentration (g.l.c.) values only. However it is straightforward that the spatial distribution of the concentration should be carefully computed, in order to assess the capability of a given model to correctly simulate the atmospheric dispersion. Therefore, the vertical and horizontal concentration profiles at various downwind distances and at different levels above ground should also be computed and compared to the corresponding observed values if any, even if this is generally thought of as very severe test for any kind of model.