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UP: Fachverband Umweltphysik

UP 15: Bodenkunde und Kryosphäre

UP 15.2: Talk

Friday, March 27, 2015, 10:15–10:30, G/gHS

Solute transport in heterogeneous layered porous media with stationary water flow — •Lisa Feustel and Kurt Roth — Institut für Umweltpysik, Heidelberg University, Germany

We present the results of tracer experiments in heterogeneous layered porous media realized in a quasi-two-dimensional Hele-Shaw cell. A flux depending pathway of the tracer pulse around structures of low conductivity is observed. Different possibilities to analyze experiments based on optical images are evaluated. It is shown, that the behavior of a tracer pulse and especially its pathway can generally be reproduced by a simulation, based on a numerical solution of the Richards equation and the convection-dispersion- equation. Material parameters are chosen on the basis of some simple geometric estimations and experimental observations. On the basis of a number of simulations solute transport in heterogeneous media is further analyzed. The heterogeneous structure of the porous medium is found to dominantly influence the shape and pathway during transport of a tracer pulse.