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Relevance of Deterministic Structures for Modeling of Transport: The Lauswiesen Case Study

Authors

  • Falk Händel,

    Corresponding author
    1. Institute for Groundwater Management, Technical University of Dresden, Bergstraße 66, D-01069 Dresden, Germany
    • UFZ, Helmholtz Centre for Environmental Research, Department of Monitoring and Exploration Technologies (MET), Permoserstraße 15, D-04318 Leipzig, Germany; (49) 35146342557; falk.haendel@ufz.de

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  • Peter Dietrich

    Corresponding author
    1. Center of Applied Geoscience, University of Tübingen, Sigwartstraße 10, D-72076 Tübingen, Germany
    • UFZ, Helmholtz Centre for Environmental Research, Department of Monitoring and Exploration Technologies (MET), Permoserstraße 15, D-04318 Leipzig, Germany; (49) 35146342557; falk.haendel@ufz.de

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Abstract

Knowledge of site-specific contaminant transport processes is an essential requirement for performing various tasks concerning the protection and management of groundwater resources. However, prediction of their behavior is often difficult, especially in heterogeneous aquifers because of the lack of information about flow- and transport-governing subsurface structures and parameters. Hence, stochastic approaches have been developed and frequently used. However, extensive modeling studies on sedimentary structures have shown that consideration of hydrogeological subunits and their distribution can be essential for transport modeling. A case study from the intensely investigated Lauswiesen site is used to demonstrate that more accurate predictions are possible with improved knowledge of deterministic structures. Results of this case study using direct-push injection logging (DPIL) provide a more reliable characterization of hydraulic conductivity than sieve and flow meter data.

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