Automatic parameter estimation applied on a groundwater model: The problem of structure identification |
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| Authors: | F Aschenbrenner A Ostin |
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| Institution: | (1) Institut f. Angewandte Geowissenschaften der Justus-Liebig-Universität, Diezstraße 15, D-35390 Giessen, Germany |
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| Abstract: | The properties of a Pleistocene aquifer located in NW Germany were evaluated by means of an inverse two-dimensional numerical model in the vertical plane. The steady-state drawdown recorded at the end of a pumping test was used to calibrate the model with a Gauss-Newton parameter estimation method. The results were analyzed within a formal statistical procedure by means of eigenvalues and eigenvectors. Although a mathematically meaningful value for the standard error can be obtained, the resulting set of permeabilities depends strongly upon the choice of the zonation pattern. |
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| Keywords: | Groundwater modeling Parameter estimation |
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