Articles | Volume 22, issue 2
Research article
 | Highlight paper
01 Mar 2018
Research article | Highlight paper |  | 01 Mar 2018

Imaging groundwater infiltration dynamics in the karst vadose zone with long-term ERT monitoring

Arnaud Watlet, Olivier Kaufmann, Antoine Triantafyllou, Amaël Poulain, Jonathan E. Chambers, Philip I. Meldrum, Paul B. Wilkinson, Vincent Hallet, Yves Quinif, Michel Van Ruymbeke, and Michel Van Camp

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Subject: Vadose Zone Hydrology | Techniques and Approaches: Instruments and observation techniques
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Cited articles

Allen, R. G., Pereira, S. L., Raes, D., and Smith, M.: Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56, FAO, Rome, Italy, 300, D05109, 1998.
Aquilina, L., Ladouche, B., Doerfliger, N., and Bakalowicz, M.: Deep water circulation, residence time, and chemistry in a karst complex, Ground Water, 41, 790–805, 2003.
Arbel, Y., Greenbaum, N., Lange, J., and Inbar, M.: Infiltration processes and flow rates in developed karst vadose zone using tracers in cave drips, Earth Surf. Proc. Land., 35, 1682–1693,, 2010.
Archie, G. E.: The electrical resistivity log as an aid in determining some reservoir characteristics, Trans. AIME, 146, 54–62, 1942.
Atkinson, T. C.: Diffuse flow and conduit flow in limestone terrain in the Mendip Hills, Somerset (Great Britain), J. Hydrol., 35, 93–110,, 1977.
Short summary
Understanding water infiltration in karst regions is crucial as the aquifers they host provide drinkable water for a quarter of the world's population. We present a non-invasive tool to image hydrological processes in karst systems. At our field site, the injection of electrical current in the ground, repeated daily over a 3-year period, allowed imaging changes in the groundwater content. We show that specific geological layers control seasonal to rainfall-triggered water infiltration dynamics.