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)

摘要

In geophysical and hydrological studies, it can be challenging to achieve a complete understanding of infiltration processes in the upper zone of a karstic aquifer since this type of medium is highly heterogeneous and may contain a perched aquifer. In an effort to further investigate such aquifers, time-lapse electrical resistivity tomography and time-lapse seismic refraction tomography were carried out at three different epochs and at two sites on a dolostone plateau of Southern France. The first site has a sinkhole, whereas the second covers a less efficiently drained area, which is characterized by temporary lakes during periods of heavy rain.