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| Titel |
Detection of groundwater salinisation by geoelectric measurements |
| VerfasserIn |
Florian Wagner, Marcus Moeller, Cornelia Schmidt-Hattenberger, Thomas Kempka, Hansruedi Maurer |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250049090
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| Zusammenfassung |
| Intrusion of saline water into potable water resources is a major concern in feasibility studies
for the sequestration of CO2 in deep saline aquifers and for heat extraction from geothermal
brine. Non-invasive geophysical monitoring techniques may provide the capability to predict
groundwater deterioration at an early stage. Numerical simulations can play an important role
in understanding the behaviour of saline water migration caused by complex multiphase flow
processes and pressure buildup within the geological storage formation. In this
study, coupled thermal-hydraulic-chemical models of two different saline water
migration scenarios are investigated employing the TOUGH2/ECO2N and PFLOTRAN
simulators. An experimental realisation of the simulated saltwater intrusion scenarios is
implemented by using a laboratory scale sandbox model. Electrical Resistivity Tomography
measurements are carried out in order to delineate the temporal and spatial intrusion of
saline water into freshwater saturated porous media. With the objective to optimise
sensitivity and resolution of the array, different multi-electrode configurations are tested.
This study aims at improving the calibration of field scale subsurface monitoring
techniques by a comparative interpretation of modelled and experimental data. |
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