Origin and residence times of groundwater in pre-mountainous hard-rock systems, The example of the Rio Clarillo hydrosystem (Pirque, Santiago, Chile)

Guillermo Poblete, Pontifical Catholic University of Chile, Santiago, Chile, Sarah Leray, Pontifical Catholic University of Chile, Ingeniería Hidráulica y Ambiental, Santiago, Chile and Viginie Vergnaud, University of Rennes, Rennes Cedex, France