Modeling groundwater-surface water interactions using the Dupuit approximation

We propose an alternate Dupuit model of groundwater-surface water interaction and demonstrate, for the case considered, that adding a second effective parameter allows us to eliminate global errors in head and discharge, and eliminate the dependence of the effective values on the flow field. Explicit expressions are provided to evaluate the two effective properties. We propose that the results be used as a general guideline for modeling groundwater-surface water interaction at streams.