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Comptes Rendus Géoscience
Volume 338, n° 16
pages 1203-1212 (décembre 2006)
Doi : 10.1016/j.crte.2006.09.009
Received : 31 Mars 2006 ;  accepted : 12 September 2006
Contribution of stable isotopes to the understanding of the unsaturated zone of a carbonate aquifer (Nerja Cave, southern Spain)
Contribution des isotopes stables à la connaissance de la zone non saturée dʼun aquifère carbonaté (grotte de Nerja, Sud de lʼEspagne)

Francisco Carrasco a , Bartolomé Andreo a , Cristina Liñán b , Jacques Mudry c,
a Departamento de Geología, Facultad de Ciencias, 29071 Málaga, Spain 
b Fundación Cueva de Nerja, Carmen, 1, 29780 Nerja (Málaga), Spain 
c Département de géosciences, université de Franche-Comté, 16, route de Gray, 25030 Besançon cedex, France 

Corresponding author.

We analysed the stable isotopes (18O and 2H) of rainwater and drip water within a cave (Nerja Cave) located in the unsaturated zone of a carbonate aquifer. Rainfall is more abundant and presents lower isotopic content in winter, while the volume of drip water is greater and its isotopic content is lower in summer. The flow analysis of 18O through the unsaturated zone confirms the seasonal lag between rainfall and the appearance of drip water in the cave and reveals that the unsaturated zone of the aquifer, in the sector of the cave, behaves like an inertial system with a strong capability to modulate the input signal. To cite this article: F. Carrasco et al., C. R. Geoscience 338 (2006).

The full text of this article is available in PDF format.

Les isotopes stables (18O and 2H) de la pluie et des eaux de suintement collectées dans une grotte (grotte de Nerja) située dans la zone non saturée dʼun aquifère carbonaté ont été analysés. La pluie est plus abondante et présente une teneur isotopique plus appauvrie en hiver, alors que le débit dʼeau de suintement est plus grand en été, avec des teneurs plus appauvries. Lʼanalyse du flux de 18O à travers la zone non saturée confirme le décalage saisonnier entre pluie et restitution dans la grotte. Il révèle que la zone non saturée, dans le secteur de la grotte, se comporte comme un système inertiel, avec une forte capacité de modulation du signal dʼentrée. Pour citer cet article : F. Carrasco et al., C. R. Geoscience 338 (2006).

The full text of this article is available in PDF format.

Keywords : Stable isotopes, Rainfall, Unsaturated zone, Drip water, Carbonate aquifer, Nerja, Cave, Southern Spain

Mots-clés : Isotopes stables, Pluie, Zone non saturée, Eau de suintement, Aquifère carbonaté, Grotte de Nerja, Sud de lʼEspagne

© 2006  Académie des sciences@@#104156@@
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