River-damming landslides during the 1960 Chile earthquake (M9.5) and earlier events: implications for risk assessment in the San Pedro River basin

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dc.contributor.authorAraya-Cornejo, Cristian
dc.contributor.authorCarvajal, Matias
dc.contributor.authorMelnick, Daniel
dc.contributor.authorMoernaut, Jasper
dc.contributor.authorAraya, Cesar
dc.contributor.authorGonzalez, Felipe
dc.date.accessioned2025-01-20T17:07:49Z
dc.date.available2025-01-20T17:07:49Z
dc.date.issued2024
dc.description.abstractDamming rivers by landslides and ensuing outburst flooding is a common and potentially hazardous phenomenon worldwide, especially in tectonically active regions. Remarkable examples are the damming of the upper course of the San Pedro River (SPR) in south Chile during the 1960 Chile earthquake (M9.5) and its predecessor in 1575. Outburst floods following both events had tragic consequences for downstream communities. Here, we study both events from multiple sources of information, including previously published and newly found historical records, satellite imagery, LiDAR topography, and sedimentological and geomorphological field observations. We present the first detailed geomorphic map of the region. Morphological similarities between ancient deposits at the SPR and those associated with the 1960 earthquake suggest that the SPR has been dammed repeatedly in the past. The steep incision of the SPR and the sediments of glacio-lacustrine origin in the surrounding slopes facilitate the initiation of large landslides. The knowledge gained from studying these past events provides important implications for future risk assessments. We propose that besides large earthquakes, smaller and more frequent earthquakes as well as changes in land use, can also result in river-damming events.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s11069-024-06474-8
dc.identifier.eissn1573-0840
dc.identifier.issn0921-030X
dc.identifier.urihttps://doi.org/10.1007/s11069-024-06474-8
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90897
dc.identifier.wosidWOS:001179061600002
dc.issue.numero8
dc.language.isoen
dc.pagina.final7193
dc.pagina.inicio7173
dc.revistaNatural hazards
dc.rightsacceso restringido
dc.subjectEarthquakes
dc.subjectLandslide dams
dc.subject1960 Chile earthquake
dc.subjectValdivia
dc.subjectSan Pedro River basin
dc.subjectRisk assessment
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleRiver-damming landslides during the 1960 Chile earthquake (M9.5) and earlier events: implications for risk assessment in the San Pedro River basin
dc.typeartículo
dc.volumen120
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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