Development and parameterisation of a complex hydrogeological model based on high-resolution direct-push data |
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Authors: | B Miles T Kalbacher O Kolditz C Chen J Gronewold W Wang A Peter |
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Institution: | (1) Tuebingen Groundwater Research Institute (TGF), c/o Center for Applied Geosciences, University of Tuebingen, Sigwartstr. 10, Tuebingen, 72076, Germany;(2) Center for Applied Geosciences, University of Tuebingen, Sigwartstr. 10, Tuebingen, 72076, Germany |
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Abstract: | Ongoing developments in geological and hydrogeological investigation techniques, especially direct-push methods, have led
to an increase in the quality, density and spatial resolution of data available from such investigations. This has created
new challenges in the development of numerical models in terms of accurately and efficiently translating detailed and complex
conceptual models into effective numerical models. Suitable geometrical and numerical modelling tools are essential in order
to meet these challenges. This paper describes the development of a three-dimensional hydrogeological flow model for a contaminated
site near Berlin, Germany, based on high-resolution geological data obtained principally using direct-push methods. The available
data were first interpreted to construct a detailed GIS-based geological model, which formed the basis of the conceptual site
model. The conceptual model was then translated into a geometrical model, which was used to create a finite element numerical
model. An innovative geometry object-based approach enabled the complex structural details of the conceptual model to be accurately
reproduced in the numerical model domain. The resulting three-dimensional steady-state unconfined flow model was successfully
calibrated using external automated calibration software, whereby parameter values for groundwater recharge and hydraulic
conductivity were determined. |
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Keywords: | Groundwater modelling High-resolution data Parameter optimisation Geometrical model Direct-push |
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