Présentations Colloques

Oral Presentation
Session 8.10: Recent developments in groundwater modeling and mathematical tools in Hydrogeology
Liedl Rudolf
Insights into karstic systems through inverse application of discrete conduit-continuum models
Numerical models can provide enormous insights into the functioning of karst systems. However, design, setup, and application of karst models are ratehr challenging due to distinctive heterogeneity and anisotropy as well as reduced accessibility of real karst systems. In particular, model parametrization frequently involves a cumbersome calibration procedure. To some extent, this step can be supported by coupling automated parameter estimation (e.g. based on PEST, Doherty 2015) with a numerical hybrid karst flow and transport model like CFP (MODFLOW-2005 Conduit Flow Process).**In this paper we apply this approach to the Sheshpeer catchment, situated in Iran. Here, the spatial as well as the temporal scales involve flow and solute transport over approximately 20 kms within months to years. A stepwise procedure, starting with highly idealized models and subsequently added complexity, allows to handle the inverse modelling application. Highlighting aspects of the results are the possibility to exclude conceptual representations of the karst systems together with achieved parameter sensitivities and ranges for adequate conceptual models, which can be further investigated in upcoming, more detailed numerical experiments.**