Review of self-potential methods in hydrogeophysics |
| |
| Authors: | Laurence Jouniaux Alexis Maineult Véronique Naudet Marc Pessel Pascal Sailhac |
| |
| Institution: | 1. UMR 7516, CNRS, université de Strasbourg (EOST), institut de physique du globe de Strasbourg, 5, rue René-Descartes, 67000 Strasbourg, France;2. UMR 7154, CNRS, université Paris-Diderot, institut de physique du globe de Paris, 4, place Jussieu, case 89, 75252 Paris cedex 05, France;3. EA 4134 (géosciences hydrosciences matériaux constructions), laboratoire Ghymac, université Bordeaux 1, avenue des Facultés, 33405 Talence cedex, France;4. UMR 8148, CNRS, laboratoire IDES, université de Paris-Sud XI, 91405 Orsay, France |
| |
| Abstract: | The self-potential (SP) method is a passive geophysical method based on the natural occurrence of electrical fields on the Earth's surface. Combined with other geophysical methods, SP surveys are especially useful for localizing and quantifying groundwater flows and pollutant plume spreading, and estimating pertinent hydraulic properties of aquifers (water table, hydraulic conductivity). Laboratory experiments have shown that the involved coupling coefficients mainly depend on the fluid chemistry, conductivity and pH, and on the soil or rock properties. The interpretation of SP observations can be done qualitatively, for instance, by correlation of SP gradients with water fluxes (through electrokinetics) or salt fluxes (through electro-diffusion). In recent years, the interpretation has been improved with the help of modelling or/and inversion of the Poisson equation and endeavours to estimate hydraulic parameters by means of the intensity of electric current sources caused by underground flows. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
