Reference : A Saline Tracer Test Monitored with ERT to Detect Preferential Flow/Transport Paths in L...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Geological, petroleum & mining engineering
http://hdl.handle.net/2268/71595
A Saline Tracer Test Monitored with ERT to Detect Preferential Flow/Transport Paths in Limestones
English
[en] Monitoring d'un essai de traçage salin par tomographie de résistivité électrique pour la détection de chemins préférentiels de transport de soluté en milieu calcaire
Robert, Tanguy [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Caterina, David mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
Deceuster, John mailto [Université de Mons-Hainaut - UMH > Géologie Fondamentale et Appliquée > Géophysique Appliquée > >]
Kaufmann, Olivier mailto [Université de Mons-Hainaut - UMH > Géologie Fondamentale et Appliquée > Géophysique Appliquée > >]
Nguyen, Frédéric mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géophysique appliquée >]
7-Sep-2010
EarthDoc - Near Surface 2010 – 16th European Meeting of Environmental and Engineering Geophysics
Yes
No
International
Near Surface 2010 – 16th European Meeting of Environmental and Engineering Geophysics
du 06 septembre 2010 au 08 septembre 2010
EAGE - European Association of Geoscientists & Engineers
Zürich
Suisse
[en] Fractures ; Tracer test ; Electrical resistivity tomography ; Monitoring ; Geophysics ; Hydrogeology
[en] The success of a tracer test highly depends on the number and the localisation of the sampling wells. When preferential solute transport paths are expected, one needs to set up carefully the tracer test to recover information such as the local groundwater flow direction and an estimate of the transport velocities. In this work, we used electrical resistivity tomography (ERT) to monitor a saline tracer test. This experiment was performed in fractured limestones where high transport velocities and strong dilution effects were expected. This required a continuous injection and fast ERT acquisition. Two different salt concentrations (40 and 160 g/l) were injected to deal with dilution effects. We also tested the resolution and the depth of investigation of our dipole-dipole sequence by changing the electrode spacing. Two transversal (and a longitudinal) profiles were placed every 20 m from the injection well. During the first (second) test, a maximum of -8 % (-16 %) change of electrical resistivity was observed in the nearest ERT profile while no change occurred in the other ones. We were then able to estimate the transport velocities in addition to the local groundwater flow direction even if the dilution effects were important.
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/2268/71595
EarthDoc is an online publication of EAGE

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