Groundwater resources and recharge processes in the Western Andean Front of Central Chile

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dc.contributor.authorTaucare, Matias
dc.contributor.authorDaniele, Linda
dc.contributor.authorViguier, Benoit
dc.contributor.authorVallejos, Angela
dc.contributor.authorArancibia, Gloria
dc.date.accessioned2024-01-10T13:13:23Z
dc.date.available2024-01-10T13:13:23Z
dc.date.issued2020
dc.description.abstractIn Central Chile, the increment of withdrawals together with drought conditions has exposed the poor understanding of the regional hydrogeological system. In this study, we addressed theWestern Andean Front hydrogeology by hydrogeochemical and water stable isotope analyses of 23 springs, 10 boreholes, 5 rain-collectors and 5 leaching-rocks samples at Aconcagua Basin. From the upstream to the downstream parts of the Western Andean Front, most groundwater is HCO3-Ca and results from the dissolution of anorthite, labradorite and other silicate minerals. The Hierarchical Cluster Analysis groups the samples according to its position along the Western Andean Front and supports a clear correlation between the increasing groundwater mineralization (31-1188 mu S/cm) and residence time. Through Factorial Analysis, we point that Cl, NO3, Sr and Ba concentrations are related to agriculture practices in the Central Depression. After defining the regional meteoric water line at 33 degrees S in Chile, water isotopes demonstrate the role of rain and snowmelt above similar to 2000 m asl in the recharge of groundwater. Finally, we propose an original conceptual model applicable to the entire Central Chile. During dry periods, water releases fromhigh-elevation areas infiltrate in mid-mountain gullies feeding groundwater circulation in the fractured rocks of Western Andean Front. To the downstream, mountain-block and -front processes recharge the alluvial aquifers. Irrigation canals, conducting water from Principal Cordillera, play a significant role in the recharge of Central Depression aquifers. While groundwater in the Western Andean Front has a high-quality according to different water uses, intensive agriculture practices in the Central Depression cause an increment of hazardous elements for human-health in groundwater. (C) 2020 Elsevier B.V. All rights reserved.
dc.description.funderAgencia Nacional de Investigacion y Desarrollo de Chile (ANID) through the public funding program: FONDECYT
dc.description.funderAgencia Nacional de Investigacion y Desarrollo de Chile (ANID) through the public funding program: FONDAP
dc.description.funderAgencia Nacional de Investigacion y Desarrollo de Chile (ANID) through the public funding program: FONDEQUIP
dc.description.funderAgencia Nacional de Investigacion y Desarrollo de Chile (ANID) through the public funding program: ECOS-CONICYT
dc.description.funderANID-Beca Doctorado Nacional
dc.fechaingreso.objetodigital09-04-2024
dc.format.extent17 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.scitotenv.2020.137824
dc.identifier.eissn1879-1026
dc.identifier.issn0048-9697
dc.identifier.pubmedidMEDLINE:32199370
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2020.137824
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78299
dc.identifier.wosidWOS:000535470700006
dc.information.autorucIngeniería;Arancibia Hernandez Gloria Cec;S/I;1008583
dc.language.isoen
dc.nota.accesoContenido parcial
dc.publisherELSEVIER
dc.revistaSCIENCE OF THE TOTAL ENVIRONMENT
dc.rightsacceso restringido
dc.subjectGroundwater
dc.subjectFractured aquifer
dc.subjectMountain front zone
dc.subjectHydrogeochemistry
dc.subjectWater stable isotopes
dc.subjectAconcagua Basin
dc.subjectACONCAGUA RIVER-BASIN
dc.subjectATACAMA DESERT
dc.subjectNORTHERN CHILE
dc.subjectSTATISTICAL-ANALYSIS
dc.subjectTRACE-ELEMENTS
dc.subjectROCK GLACIERS
dc.subjectWATER
dc.subjectPRECIPITATION
dc.subjectAQUIFER
dc.subjectCORDILLERA
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleGroundwater resources and recharge processes in the Western Andean Front of Central Chile
dc.typeartículo
dc.volumen722
sipa.codpersvinculados1008583
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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