Application of combined time‐lapse seismic refraction and electrical resistivity tomography to the analysis of infiltration and dissolution processes in the epikarst of the Causse du Larzac (France)

Combined time-lapse seismic refraction and electrical resistivity tomography reveal that infiltration processes in the epikarst of the Causse du Larzac (France) are strongly influenced by dissolution, particularly ghost-rock weathering. This process attacks the dolostone rock frame, leading to significant velocity variations that challenge explanations based solely on the Biot–Gassmann relationship. The study highlights how these geophysical methods correlate with hydrological data, offering new insights into the dynamics of karstic landscapes and potential collapse risks. Conducted at two sites—one with a sinkhole and another with temporary lakes—the research underscores the importance of integrating multi-modal geophysical techniques to unravel complex infiltration mechanisms in heterogeneous karst environments.

Valois, R., Galibert, P.-Y., Guerin, R., & Plagnes, V. (2015). Application of combined time‐lapse seismic refraction and electrical resistivity tomography to the analysis of infiltration and dissolution processes in the epikarst of the Causse du Larzac (France). Near Surface Geophysics, 14(1), 13–22. Portico. https://doi.org/10.3997/1873-0604.2015052