Streamflow Trends in Central Chile

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dc.contributor.authorSanguesa, Claudia
dc.contributor.authorPizarro, Roberto
dc.contributor.authorIngram, Ben
dc.contributor.authorBalocchi, Francisco
dc.contributor.authorGarcia-Chevesich, Pablo
dc.contributor.authorPino, Juan
dc.contributor.authorIbanez, Alfredo
dc.contributor.authorVallejos, Carlos
dc.contributor.authorMendoza, Romina
dc.contributor.authorBernal, Alejandra
dc.contributor.authorValdes-Pineda, Rodrigo
dc.contributor.authorPerez, Felipe
dc.date.accessioned2025-01-20T20:08:17Z
dc.date.available2025-01-20T20:08:17Z
dc.date.issued2023
dc.description.abstractThe availability of water in Chile has shown signs of decline in recent decades. This is problematic because Chile's economy depends on mining, forestry, and agricultural activities, all limited by the availability of water resources. In this study, daily, monthly and annual flows in 31 basins located in the arid-semiarid zones (29 & DEG;12 & PRIME; S-33 & DEG;58 & PRIME; S) and in the humid-subhumid zones (34 & DEG;43 & PRIME; S-38 & DEG;30 & PRIME; S) of Chile were evaluated using the Mann-Kendall trend test and the quantile-Kendall procedure during three periods: 1984-2021 (31 stations), 1975-2021 (20 stations), and 1969-2021 (18 stations). Results showed that, at the annual level, trends were predominantly negative in both climatic zones and over the three periods analyzed. In the arid-semiarid zone, a higher frequency of annual significant negative trends was found in maximum flows in 1969-2021 and 1975-2021, compared to the last period under study. The humid-subhumid zone showed significant annual negative trends in all series analyzed. At the monthly level, on the other hand, the arid-semiarid zone showed a decrease in significant negative trends as the number of years analyzed increased, for all flow types. The humid-subhumid zone did not indicate a similar defined pattern. Likewise, the quantile-Kendall procedure showed a reduction in the significant trends as the length of the time series was increased in the arid-semiarid zone, but no such pattern was observed in the humid-subhumid zone. Furthermore, a relationship was observed for the PDO and the summer month flows for both zones. Consequently, it is concluded that the flow trends are generally negative, and their statistical significance depends on the period studied.
dc.description.funderANID BASAL
dc.fuente.origenWOS
dc.identifier.doi10.3390/hydrology10070144
dc.identifier.eissn2306-5338
dc.identifier.urihttps://doi.org/10.3390/hydrology10070144
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91888
dc.identifier.wosidWOS:001038498500001
dc.issue.numero7
dc.language.isoen
dc.revistaHydrology
dc.rightsacceso restringido
dc.subjectMann-Kendall test
dc.subjectTheil-Sen estimator
dc.subjectquantile-Kendall procedure
dc.subjectstreamflows Chile
dc.subjectclimatic zones
dc.subjecttime period length
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleStreamflow Trends in Central Chile
dc.typeartículo
dc.volumen10
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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