Comparing Methods for the Regionalization of Intensity-Duration-Frequency (IDF) Curve Parameters in Sparsely-Gauged and Ungauged Areas of Central Chile

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dc.contributor.authorSanguesa, Claudia
dc.contributor.authorPizarro, Roberto
dc.contributor.authorIngram, Ben
dc.contributor.authorIbanez, Alfredo
dc.contributor.authorRivera, Diego
dc.contributor.authorGarcia-Chevesich, Pablo
dc.contributor.authorPino, Juan
dc.contributor.authorPerez, Felipe
dc.contributor.authorBalocchi, Francisco
dc.contributor.authorPena, Francisco
dc.date.accessioned2025-01-20T17:33:10Z
dc.date.available2025-01-20T17:33:10Z
dc.date.issued2023
dc.description.abstractEstimating intensity-duration-frequency (IDF) curves requires local historical information of precipitation intensity. When such information is unavailable, as in areas without rain gauges, it is necessary to consider other methods to estimate curve parameters. In this study, three methods were explored to estimate IDF curves in ungauged areas: Kriging (KG), Inverse Distance Weighting (IDW), and Storm Index (SI). To test the viability of these methods, historical data collected from 31 rain gauges distributed in central Chile, 35 degrees S to 38 degrees S, are used. As a result of the reduced number of rain gauges to evaluate the performance of each method, we used LOOCV (Leaving One Out Cross Validation). The results indicate that KG was limited due to the sparse distribution of rain gauges in central Chile. SI (a linear scaling method) showed the smallest prediction error in all of the ungauged locations, and outperformed both KG and IDW. However, the SI method does not provide estimates of uncertainty, as is possible with KG. The simplicity of SI renders it a viable method for extrapolating IDF curves to locations without data in the central zone of Chile.
dc.description.funderCentro de Recursos Hidricos para la Agricultura y la Mineria
dc.fuente.origenWOS
dc.identifier.doi10.3390/hydrology10090179
dc.identifier.eissn2306-5338
dc.identifier.urihttps://doi.org/10.3390/hydrology10090179
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91639
dc.identifier.wosidWOS:001078479200001
dc.issue.numero9
dc.language.isoen
dc.revistaHydrology
dc.rightsacceso restringido
dc.subjectregionalization IDF curves
dc.subjectIDF Kriging
dc.subjectIDW IDF curves
dc.subjectChile IDF curves
dc.subject.ods02 Zero Hunger
dc.subject.odspa02 Hambre cero
dc.titleComparing Methods for the Regionalization of Intensity-Duration-Frequency (IDF) Curve Parameters in Sparsely-Gauged and Ungauged Areas of Central Chile
dc.typeartículo
dc.volumen10
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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