ORBi: Robert Tanguy - Improving Groundwater Flow Model Conceptualisation and Calibration with ERT and Self-potential Methods

Reference : Improving Groundwater Flow Model Conceptualisation and Calibration with ERT and Self-pot...


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Geological, petroleum & mining engineering
	To cite this reference:	http://hdl.handle.net/2268/98865

Title :	Improving Groundwater Flow Model Conceptualisation and Calibration with ERT and Self-potential Methods
Language :	English
Alternative title :	[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
Author, co-author :	Robert, Tanguy [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
	Therrien, René [Université Laval > Département de géologie et de génie géologique > > >]
	Lemieux, Jean-Michel [Université Laval > Département de géologie et de génie géologique > > >]
	Nguyen, Frédéric [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Publication date :	14-Sep-2011
Main document title :	EarthDoc - Near Surface 2011 – 17th European Meeting of Environmental and Engineering Geophysics
Peer reviewed :	Yes
On invitation :	No
Audience :	International
Event name :	Near Surface 2011 – 17th European Meeting of Environmental and Engineering Geophysics
Event date :	du 12 septembre 2011 au 14 septembre 2011
Event organizer :	EAGE - European Association of Geoscientists & Engineers
Event place (city) :	Leicester
Event country :	United Kingdom
Keywords :	[en] Fractures ; ERT ; Self-potential ; Groundwater flow ; Conceptualisation ; Calibration ; Implementation ; HydroGeoSphere ; Modeling ; Inversion ; Hydrogeophysics
Abstract :	[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.
Research units :	Université de Liège - Département ArGEnCo - GEO³ - Geophysique Appliquée
Funders :	Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Name of the research project :	Identification, caractérisation et suivi géophysique des écoulements préférentiels des eaux souterraines en milieu fracturé
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/98865
Commentary :	EarthDoc is an online publication of EAGE

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Restricted access	Robert et al. 2011_Proceedings_Near_Surface_2011_F13.pdf		Publisher postprint	2.65 MB	Request copy

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Private access	NS2011_ROBERT_F13.pdf		-	3.03 MB	Request copy

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