Improving the underground structural characterization and hydrological functioning of an Andean peatland using geoelectrics and water stable isotopes in semi-arid Chile

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dc.contributor.authorValois, Remi
dc.contributor.authorAraya Vargas, Jaime
dc.contributor.authorMacDonell, Shelley
dc.contributor.authorGuzman Pinones, Camilo
dc.contributor.authorFernandoy, Francisco
dc.contributor.authorYanez Carrizo, Gonzalo
dc.contributor.authorCuevas, Jaime G.
dc.contributor.authorSproles, Eric A.
dc.contributor.authorMaldonado, Antonio
dc.date.accessioned2025-01-20T23:54:33Z
dc.date.available2025-01-20T23:54:33Z
dc.date.issued2021
dc.description.abstractHigh altitude, Andean wetlands, or bofedales as they are locally known, are important regulators of the local water balance and also play a key role in sustaining biodiversity. Nevertheless, there is almost no information regarding their hydrogeological structure and functioning. This paper aims to characterize the thickness of the alluvial filling of one peat-accumulating wetland in North-Central Chile using Electrical Resistivity Tomography (ERT) to assess its role as a water reservoir. To develop a quasi-3D understanding of the peatland's structure, four ERT profiles were conducted. Results highlight a conductive basin shape of the peatland, with a thicker interface downstream than upstream between alluvial materials and the underlying bedrock or rock screes. Those results allow the estimate of the water column (1000-3400 mm) within the peatland alluvial filling. The second objective is to better understand the water exchanges between the peatland and the streamflow using discharge measurements and water stable isotopes. Water and isotopes budgets highlight a streamflow loss towards the peatland groundwater reservoir at the end of spring season. In addition, ten delta O-18 and delta H-2 surveys were used to characterize the distinct wetland water sources and their temporal variations. A peatland conceptual model is proposed to connect groundwater, rock glaciers, snowmelt, and hillslope flows. Andean peatlands provide a pivotal control on water delivery downstream, and therefore, understanding their structure and function is important, because they are unique structures providing ecological services at high elevations.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s12665-020-09331-6
dc.identifier.eissn1866-6299
dc.identifier.issn1866-6280
dc.identifier.urihttps://doi.org/10.1007/s12665-020-09331-6
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95033
dc.identifier.wosidWOS:000610422200010
dc.issue.numero1
dc.language.isoen
dc.revistaEnvironmental earth sciences
dc.rightsacceso restringido
dc.subjectHydrology
dc.subjectPeatland
dc.subjectElectrical resistivity tomography
dc.subjectWater stable isotopes
dc.subjectChilean andes
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.titleImproving the underground structural characterization and hydrological functioning of an Andean peatland using geoelectrics and water stable isotopes in semi-arid Chile
dc.typeartículo
dc.volumen80
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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