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Imaging hydrological dynamics in karst unsaturated zones by time-lapse electrical resistivity tomography

dc.rights.licenseopenen_US
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorZHANG, Jian
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
hal.structure.identifierUniversité de Bordeaux [UB]
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
hal.structure.identifierANTEA GROUP
dc.contributor.authorSIRIEIX, Colette
IDREF: 071604650
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGENTY, Dominique
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorSALMON, Fabien
IDREF: 228324467
hal.structure.identifierUniversité de Bordeaux [UB]
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorVERDET, Cecile
IDREF: 228324378
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorMATEO, Sylvain
dc.contributor.authorXU, Shan
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBUJAN, Stephane
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDEVAUX, Ludovic
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorLARCANCHE, Marie
dc.date.accessioned2024-07-16T14:29:40Z
dc.date.available2024-07-16T14:29:40Z
dc.date.issued2024-01-01
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/200976
dc.description.abstractEnThe hydrodynamics of karst terrain are highly complex due to the diverse fractures and reservoirs within limestone formations. The time delay between rainfall events and subsequent flow into reservoirs exhibits significant variability. However, these hydrological processes are not easily visualized in karst topography. Subsurface geophysics, specifically 2D time-lapse electrical resistivity tomography (ERT), provides an effective method for studying the relationships between hydrological and geophysical features. In our research, we adopted ERT in the Karst Critical Zone (KCZ) to visualize specific karstic zones, including cave galleries, water storage reservoirs, wetting fronts, soil layers, and potential preferential flow paths down to a depth of 20 m. To capture spatial and seasonal variations in resistivity, we presented a comprehensive approach by combining sixteen inversion models obtained between February 2020 and September 2022 above the Villars Cave in SW-France-a well-known prehistoric cave. We used a multi-dimensional statistical technique called Hierarchical Agglomerative Clustering (HAC) to create a composite model that divided the synthetic ERT image into eight clusters representing different karst critical zones. The ERT image clearly visualized the cave gallery with high resistivity values that remained consistent throughout the seasons. Our analysis revealed a close seasonal relationship between water excess and resistivity variations in most infiltration zones, with time delays increasing with depth. The karst reservoirs, located at significant depths compared to other clusters, displayed sensitivity to changes in water excess but were primarily affected by fluctuations in water conductivity, particularly during summer or dry periods. These findings have significant implications for predicting rainwater infiltration pathways into caves, thereby assisting in the conservation and preservation of prehistoric caves and their cultural heritage.
dc.language.isoENen_US
dc.subject.enDrip rate
dc.subject.enElectrical resistivity tomography
dc.subject.enHierarchical agglomerative clustering
dc.subject.enInfiltration
dc.subject.enKarst reservoirs
dc.title.enImaging hydrological dynamics in karst unsaturated zones by time-lapse electrical resistivity tomography
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.scitotenv.2023.168037en_US
dc.subject.halSciences de l'ingénieur [physics]/Matériauxen_US
dc.identifier.pubmed37879471en_US
bordeaux.journalThe Science of The Total Environmenten_US
bordeaux.page168037en_US
bordeaux.volume907en_US
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionBordeaux INPen_US
bordeaux.institutionCNRSen_US
bordeaux.institutionINRAEen_US
bordeaux.institutionArts et Métiersen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-04650297
hal.version1
hal.date.transferred2024-07-16T14:29:43Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
dc.rights.ccPas de Licence CCen_US
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