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Fig. 1. Results from the numerical modeling analysis of matrix flow and transport in the soilbox experiments: Distribution of equipotential lines, velocity field, and tracer concentration (gray-scale) for three different hydraulic conductivities at 5% slope (top left) and 20% slope (top right). Resulting breakthrough curves at the lower right hand outflow lip over a 4-h period (bottom). Due to the steady-state conditions, the equipotential lines are assumed identical for the matrix and macropore domain. Hence, the orientation of the velocity field is representative of both domains.
