Runoff variation and progressive aridity during drought in catchments in southern-central Chile

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dc.contributor.authorBarrientos, Guillermo
dc.contributor.authorRubilar, Rafael
dc.contributor.authorDuarte, Efrain
dc.contributor.authorParedes, Alberto
dc.date.accessioned2025-01-20T17:24:28Z
dc.date.available2025-01-20T17:24:28Z
dc.date.issued2023
dc.description.abstractPersistent drought events frequently intensify the aridity of ecosystems and cause catchment runoff depletion. Here, using large and long-term data sets of meteorological and hydrologic variables (precipitation, runoff, temperature, and potential evapotranspiration) investigated the major causes that modulated catchment runoff depletion between years 1980 and 2020 in southern-central Chile. We identify the hydrological years where aridity index intensified and analyzed its relationship with annual runoff, and evaluated the effect of the annual evaporation index and annual aridity index on water balance of 44 catchments with different precipitation regimes located between 35 degrees and 40 degrees S. Our results showed that observed precipitation and runoff significantly decreased between 1980 and 2020 in 64% of the catchments in the study area. Potential evapotranspiration increased significantly in 39% of the catchments. Hydrological years in which precipitation decreased, showed a decreased runoff trend. This result suggests that meteorological droughts tend to significantly decrease observed runoff. The runoff value decreased as the aridity index increased from 0.3 to 6.7, and the Budyko curve captured 98.5% of the annual variability of all catchments.
dc.fuente.origenWOS
dc.identifier.doi10.2166/nh.2023.116
dc.identifier.eissn2224-7955
dc.identifier.issn1998-9563
dc.identifier.urihttps://doi.org/10.2166/nh.2023.116
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91518
dc.identifier.wosidWOS:001105146600001
dc.issue.numero12
dc.language.isoen
dc.pagina.final1605
dc.pagina.inicio1590
dc.revistaHydrology research
dc.rightsacceso restringido
dc.subjectaridity index
dc.subjectdrought
dc.subjectevaporation index
dc.subjectrunoff
dc.subject.ods13 Climate Action
dc.subject.ods06 Clean Water and Sanitation
dc.subject.ods14 Life Below Water
dc.subject.odspa13 Acción por el clima
dc.subject.odspa06 Agua limpia y saneamiento
dc.subject.odspa14 Vida submarina
dc.titleRunoff variation and progressive aridity during drought in catchments in southern-central Chile
dc.typeartículo
dc.volumen54
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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