131 6. Borehole electrical panels:an experiment The vertical electrical resistivity panels have demonstrated the ability to detect individual karst conduits in the Dogger limestone. When these voids are filled with water, they appear as point anomalies with low apparent resistivity. However, interpretation should always be supported by long normal resistivity logs (when available) and OPTV imagery. References Audouin O., Bodin J., Porel G., Bourbiaux B. (2008). Flowpath structure in a limestone aquifer: multi- borehole investigation at the hydrogeological experimental site of Poitiers, France. Hydrogeology journal, 16(5): 939–950. https://doi.org/10.1007/s10040-008-0275-4 Bernard S. (2005). Caractérisation hydrodynamique des réservoirs carbonatés fracturés. Application au site expérimental hydrogéologique (SEH) de l’Université de Poitiers – Ph.D. thesis, University of Poitiers, 24 November 2005. Boulais A., Geairon H. Gaillard T. (2026). “Hydrogeological flow logging and dry tracer tests”, Chapter 7 in A new concept of karst development based on hydrogeology and geophysics, EDP Sciences. https://doi.org/10.1051/978-2-7598-3934-6.c007. Chapellier D. (2001a). Electrical methods, from Online course of geophysics (http://www-ig.unil.ch/) Chapellier D. (2001b). Aquifer logging course, from Online course of geophysics (http://www-ig.unil.ch/) Frappin P., Morey J. (2001). Jet grouting column diameter measurement using the electric cylinder method, Travaux n° 775. Frappin P. (2011). CYLJET: an innovative method for jet grouting column diameter measurement. paper EG44, EAGE Conference & Exhibition, First International conference on Engineering Geophysics, 11–14 December 2011, AI Ain, United Arab Emirates. Gaillard T. (2026a). “Hydrogeological Experimental Site (HES)”, Chapter 4 in A new concept of karst development based on hydrogeology and geophysics, EDP Sciences. https://doi.org/10.1051/978-2-7598-3934-6.c004 Gaillard T. (2026b). “Hydro-stratigraphic study of hydrogeological Experimental Site”, Chapter 8 in A new concept of karst development based on hydrogeology and geophysics, EDP Sciences. https://doi.org/10.1051/978-2-7598-3934-6.c008 Genter A., Baujard C., Glaas C., Maurer V. (2025). “Towards a revisited geothermal conceptual model in the Upper Rhine Graben”, Chapter 4 in Geophysics in geothermal exploration: a review, EDP Sciences, https://doi.org/10.1051/978-27598-3752-6.c004
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