Articles | Volume 20, issue 8
https://doi.org/10.5194/nhess-20-2319-2020
https://doi.org/10.5194/nhess-20-2319-2020
Research article
 | 
26 Aug 2020
Research article |  | 26 Aug 2020

The mudflow disaster at Villa Santa Lucía in Chilean Patagonia: understandings and insights derived from numerical simulation and postevent field surveys

Marcelo A. Somos-Valenzuela, Joaquín E. Oyarzún-Ulloa, Ivo J. Fustos-Toribio, Natalia Garrido-Urzua, and Ningsheng Chen

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Cited articles

Aguilera, F., Honores, C., Lemus, M., Neira, H., Pérez, Y., and Rojas, J.: Evaluación de los recursos geotérmicos de la Región de Los Lagos, Informe Registrado, Servicio Nacional de Geología y Minería, Santiago, Chile, 2014. 
Aldunce, P. and González, M.: Desastres asociados al clima en la agricultura y medio rural en Chile, Fundación para la Innovación Agraria, Ministerio de Agricultura Chile, Santiago, 2009. 
Alganci, U., Besol, B., and Sertel, E.: Accuracy assessment of different digital surface models, ISPRS Int. J. Geo-Inform., 7, 1–16, https://doi.org/10.3390/ijgi7030114, 2018. 
ASF DAAC: ALOS PALSAR_Radiometric_Terrain_Corrected_hi_res; Includes Material ©JAXA/METI 2011, https://doi.org/10.5067/Z97HFCNKR6VA, 2015. 
ASTM: D2487-17, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System), ASTM International, West Conshohocken, PA, 2017a. 
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Short summary
This work presents a study of the biggest mudflow event in 20 years in Chilean Patagonia, which resulted from an avalanche in the Cordon Yelcho. We integrate in situ geotechnical tests and numerical modeling to model the Villa Santa Lucía mudflow event. Our results suggest that the initial soil water content is sufficient to transform the landslide and scoured soil into a mudflow. Therefore, knowing the soil characteristics is crucial to evaluating the impact of landslides in the study area.
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