Valois R. auteur aut IRD Camerlynck C. auteur aut IRD Dhemaied A. auteur aut IRD Guerin R. auteur aut IRD Hovhannissian Gaghik auteur aut IRD Plagnes V. auteur aut IRD Rejiba F. auteur aut IRD Robain Henri auteur aut IRD text journalArticle eng text/pdf born digital access In the protection of karstic aquifers, the role played by dolines is of interest as these shallow structures can be preferential infiltration pathways for groundwater recharge. In this study, three depressions in South France (Orniac, Lot) were identified and characterized using combined geophysical methods. Apparent conductivity mapping allows precise definition of dolines corresponding to topographic depressions. It also reveals other dolines that are hidden by soil cover. Electrical resistivity and seismic refraction tomography provide detailed cross-sections. Even though the dolines studied are close one to another, they exhibit great variability in shape and content. Moreover, time-lapse data show that the most saturated regions are on the edges of the first doline. Such information helps to evaluate human impacts and forecast potential groundwater contamination. specialized electrical resistivity tomography seismic refraction tomography sinkhole electromagnetic survey Quercy plateau karst FRANCE 064 36 9 1183-1192 2011 0197-9337 https://www.documentation.ird.fr/hor/fdi:010053659 10.1002/esp.2144 0197-9337 [F B010053659] https://www.documentation.ird.fr/hor/fdi:010053659 https://www.documentation.ird.fr/intranet/publi/2011/07/010053659.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2011-08-03 2018-03-22 fdi:010053659 fre