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Data-model comparisons of isotopic and hydrological variabilities of the karstic vadose zone above Villars Cave, SW-France based on 20 years' monitoring record

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorZHANG, Jian
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGENTY, Dominique
hal.structure.identifierArts et Métiers Institute of Technology
dc.contributor.authorSIRIEIX, Colette
IDREF: 071604650
hal.structure.identifierArts et Métiers Institute of Technology
dc.contributor.authorVERDET, Cécile
hal.structure.identifierArts et Métiers Institute of Technology
dc.contributor.authorMATEO, Sylvain
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDEVAUX, Ludovic
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSGUBIN, Giovanni
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBUJAN, Stephane
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierGlaces et Continents, Climats et Isotopes Stables [GLACCIOS]
dc.contributor.authorMINSTER, Bénédicte
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierGéochrononologie Traceurs Archéométrie [GEOTRAC]
dc.contributor.authorRÉGNIER, Edouard
hal.structure.identifierYunnan Normal University
dc.contributor.authorLI, Ting-Yong
hal.structure.identifierGéologie Environnement Conseil
dc.contributor.authorBOURGES, François
hal.structure.identifierUniversité Catholique de Louvain = Catholic University of Louvain [UCL]
dc.contributor.authorLIANG, Ming-Qiang
hal.structure.identifierYunnan Normal University
dc.contributor.authorCHEN, Chaojun
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARIEU, Vincent
dc.date.accessioned2024-03-08T13:36:29Z
dc.date.available2024-03-08T13:36:29Z
dc.date.issued2023-10
dc.identifier.issn0009-2541en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188652
dc.description.abstractEnBecause of the great heterogeneity of the limestone fissures, conduits, and reservoirs in karst areas, the understanding of the infiltration in caves and karst terrains is complicated. For example, the time delays observed between rainfall and the various flows into caves, such as shaft flow and seepage flow, exhibit significant variability. To better understand the infiltration above a typical shallow cave, Villars Cave, South-west France, we used both a very long monitoring (>20 years) isotopic data set of rainfall and dripping rates at two different cave gallery levels (14 m and 36 m below the surface, respectively) and a conceptual model (KarstFor) that mix water flows and isotopes. In order to determine the most appropriate reservoir and flow settings, we used one time-lapse electrical resistivity tomography (ERT) image made above the cave, which were incorporated into the KarstFor model. The modeled variations in storage water and infiltration flows are in a good agreement with the observed dripping discharge rates, indicating seasonal variability and various time delays between water excess ((Rainfall-Evapotranspiration) > 0) and drip rates in the different cave levels. The fact that the model strikingly simulates the small, but constant, isotopic difference of drip water δ18O (δ18Od) values between the upper and the lower galleries of Villars Cave, not only reinforces reliability in the model itself but also reveals the impact of multiple infiltration routes and karst reservoir dynamics on the δ18Od. On an inter-annual scale, the observed δ18Od values follow the variations of the water excess and of the cave temperature, which, in the period analyzed, show a marked trend, possibly induced by the climate variability patterns above the cave. Overall, these results are not only important to better understand the infiltration in karstic zones, but also to better interpret speleothem isotopic records widely used in paleo-climate studies.
dc.language.isoENen_US
dc.title.enData-model comparisons of isotopic and hydrological variabilities of the karstic vadose zone above Villars Cave, SW-France based on 20 years' monitoring record
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.chemgeo.2023.121802en_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnementen_US
bordeaux.journalChemical Geologyen_US
bordeaux.page121802en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-04264851
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
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