Numerische Modellierung der Grundwasserströmung im Einzugsgebiet der Gallusquelle unter Festlegung eines Drainagesystems | Numerical simulation of groundwater flow in the Gallusquelle catchment by determining a drainage system
2014
Mohrlok, Ulf
Groundwater flow in karst systems is mainly determined by the efficacy of the drainage through karst conduits. A great challenge for the numerical modelling of such groundwater flow consists in the lack of knowledge about this drainage system. Here, an approach is presented deriving the conduit network for the spring catchment Gallusquelle, central Swabian Alb, from different geographic information. Using this conduit network the transient groundwater flow in the catchment was simulated numerically applying the software ROCKFLOW (Wollrath & Helmig, SM-2 Strömungsmodell für inkompressible Fluide, Theorie und Benutzerhandbuch. Technischer Bericht Institut für Strömungsmechanik, Universität Hannover, 1991). The influence of different parameters on the hydraulic behaviour of the karst system could be demonstrated in a parameter study by means of simulated spring discharge and groundwater tables. In particular, the superposition of drainage behaviour and intermediate storage of groundwater from the conduits in the matrix along with recharge events could be derived in dependence of the varied parameters.
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