Reference : Improving Groundwater Flow Model Conceptualisation and Calibration with ERT and Self-pot...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Geological, petroleum & mining engineering
http://hdl.handle.net/2268/98865
Improving Groundwater Flow Model Conceptualisation and Calibration with ERT and Self-potential Methods
English
[fr] Amélioration de la conceptualisation et de la calibration de modèle d'écoulement des eaux souterraines par les méthodes de tomographie de résistivité électrique et de potentiel spontané
Robert, Tanguy [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Therrien, René mailto [Université Laval > Département de géologie et de génie géologique > > >]
Lemieux, Jean-Michel mailto [Université Laval > Département de géologie et de génie géologique > > >]
Nguyen, Frédéric mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
14-Sep-2011
EarthDoc - Near Surface 2011 – 17th European Meeting of Environmental and Engineering Geophysics
Yes
No
International
Near Surface 2011 – 17th European Meeting of Environmental and Engineering Geophysics
du 12 septembre 2011 au 14 septembre 2011
EAGE - European Association of Geoscientists & Engineers
Leicester
United Kingdom
[en] Fractures ; ERT ; Self-potential ; Groundwater flow ; Conceptualisation ; Calibration ; Implementation ; HydroGeoSphere ; Modeling ; Inversion ; Hydrogeophysics
[en] The self-potential (SP) method relies on passive measurements of the ambient electrical potential at the ground surface or in boreholes. When the electrokinetic effect is the dominant contribution, the resulting signal is called the streaming potential and contains information about groundwater fluxes that can be useful for calibration of groundwater flow models.
The streaming potential forward equation was implemented in the HydroGeoSphere model, which simulates 3D groundwater flow and solute transport in porous media, including fractured geological formations. HydroGeoSphere is able to calculate the streaming potential given a distribution of Darcy velocity and electrical resistivity.
Since groundwater flow modelling relies on a conceptual model, prior information on the distribution of the geological units and hydraulic conductivity at the site is mandatory. However, this information is often scarce or missing. In this work, we use the electrical resistivity tomography (ERT) and the SP methods as an additional source of information for building the groundwater flow model. ERT is used to identify the location of fractured zones in a fractured and karstified calcareous aquifer of South Belgium. The SP signal is used with PEST in order to calibrate the groundwater flow model and better constrain the hydraulic conductivity of the fractured zones.
Université de Liège - Département ArGEnCo - GEO³ - Geophysique Appliquée
Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Identification, caractérisation et suivi géophysique des écoulements préférentiels des eaux souterraines en milieu fracturé
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/98865
EarthDoc is an online publication of EAGE

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