HR: 0800h
AN: H41F-0482    [Abstracts]
TI: Tracer tests at Krauthausen: non-invasive monitoring using electrical resistivity tomography and predictive modeling on the basis of cone penetration test data.
AU: Muller, K
EM: k.mueller@fz-juelich.de
AF: Agrosphere Institute ICG-IV, Forschungszentrum Juelich GmbH, Juelich, 52425 Germany
AU: Englert, A
EM: a.englert@fz-juelich.de
AF: Agrosphere Institute ICG-IV, Forschungszentrum Juelich GmbH, Juelich, 52425 Germany
AU: Kemna, A
EM: a.kemna@fz-juelich.de
AF: Agrosphere Institute ICG-IV, Forschungszentrum Juelich GmbH, Juelich, 52425 Germany
AU: Vanderborght, J
EM: j.vanderborght@fz-juelich.de
AF: Agrosphere Institute ICG-IV, Forschungszentrum Juelich GmbH, Juelich, 52425 Germany
AU: * Vereecken, H
EM: h.vereecken@fz-juelich.de
AF: Agrosphere Institute ICG-IV, Forschungszentrum Juelich GmbH, Juelich, 52425 Germany
AB: The relevance of aquifer heterogeneity on flow and transport is broadly recognized. A characterization of the spatial distribution of aquifer properties and the local flow and transport process is obviously hampered by the inaccessibility of the subsurface. In this contribution, we present results of tracer tests that were carried out in a surface near aquifer at the Krauthausen test-site (Germany) and monitored with electrical resistivity tomography (ERT). The tracer breakthrough was imaged in two reference planes perpendicular to the mean flow direction. The ERT derived breakthrough compared well with local observations in multilevel groundwater samplers (MLS). This demonstrates the applicability of ERT for non-invasive monitoring of transport in groundwater. The effect of the aquifer heterogeneity on tracer transport was clearly reflected in the spatially variable tracer breakthrough in the image planes. The 3-D spatial distribution of the hydraulic conductivity in the tracer test zone was inferred from cone penetration tests. Distributions of simulated tracer breakthrough in the hydraulic conductivity field compared well with observed breakthrough patterns. This demonstrates the applicability of cone penetration tests to infer hydraulic aquifer properties. To summarize the comparison of spatio-temporal datasets of tracer breakthrough that were obtained from ERT, MLS, and numerical simulations, local breakthrough curves were interpreted with a stream tube model and the spatial distributions of fitted stream tube model parameters were compared.
DE: 1800 HYDROLOGY
DE: 1829 Groundwater hydrology
DE: 1832 Groundwater transport
DE: 5114 Permeability and porosity
DE: 5139 Transport properties
SC: Hydrology [H]
MN: Fall Meeting 2005