f Estimation of aquifer heterogeneity for flow modelling

The knowledge of spatial variability of aquifer and soil properties have proven to be an important role for modelling and simulation of groundwater or multphase flow. Information on the heterogeneity are usually obtained at selected borehole locations. Modelling and simulation requires a continuous image of the subsurface. Thus, it is necessary to get information on the vertical and horizontal heterogeneity beween the boreholes. In this paper, a strategy for aquifer description is presented based on the integration of hydrogeological and geophysical information. The key question for an integrated aquifer description is the integration of all available data and a feedback at every stage in order to improve the hydrogeological model. Aa a main question for the application of surface geophysics is regarded, whether the 3D-aquifer geometry and the variability of hydraulic parameters can be detected with an appropriate resolution to include the data into the process of model building.