Solute transport in heterogeneous soils
If applied to real field
situations simulation models have to cope with the intrinsic
heterogeneity of field soils and the variability of boundary conditions.
Complex approaches often fail here because the spatial distribution of
parameter functions can in general not be measured (or otherwise
assessed) with sufficient accuracy. The boundary conditions are often
partly unknown. By way of several case studies, I will illustrate
typical sources of variability encountered in applications and present
simplified approaches that were successful in modeling the fate of
environmental chemicals in field soils at different scales.