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Caractérisation et suivi des écoulements hydriques dans les milieux poreux par la méthode du Potentiel Spontané

Abstract : In hydrogeology, the information related to the piezometric surface and hydraulic properties is usually obtained from in situ measurements in a set of piezometers. However, this approach is intrusive and depends on the number of available piezometers. This explains why, in the last decade, research scientists looked for a new geophysical method able to determine the piezometric head variations and the groundwater flow parameters in a non-intrusive way. The self-potential method offers such possibility. Indeed, the flow of groundwater is responsible for a measurable electrical field owing to the electrokinetic coupling between the water flux and the electrical current density. This electrokinetic coupling is one of the sources for the so-called self-potential signals measured passively at the ground surface with non-polarisable electrodes. Field and laboratory experiments were undertaken in order to measure the electric signals of a groundwater flow during pumping and infiltration tests. The field and laboratory results prove the capacity of the self-potential method to follow the groundwater flow in real time. They indicate that the self-potential variations are linearly related, at the first order, to the piezometric head variations. These experiences show the usefulness of the self-potential method to monitor the groundwater flow and to estimate the groundwater flow parameters.
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https://tel.archives-ouvertes.fr/tel-00012187
Contributor : Barbara Suski <>
Submitted on : Friday, April 28, 2006 - 2:07:54 PM
Last modification on : Saturday, October 3, 2020 - 3:19:53 AM
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  • HAL Id : tel-00012187, version 1

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Barbara Suski. Caractérisation et suivi des écoulements hydriques dans les milieux poreux par la méthode du Potentiel Spontané. Géophysique [physics.geo-ph]. Université de droit, d'économie et des sciences - Aix-Marseille III, 2005. Français. ⟨tel-00012187⟩

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