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Authordc.contributor.authorZegers, Gerardo 
Authordc.contributor.authorMendoza Zúñiga, Pablo Andrés 
Authordc.contributor.authorGarcés, Alex 
Authordc.contributor.authorMontserrat, Santiago 
Admission datedc.date.accessioned2020-10-19T13:50:12Z
Available datedc.date.available2020-10-19T13:50:12Z
Publication datedc.date.issued2020
Cita de ítemdc.identifier.citationNatural Hazards and Earth System Sciences Volumen: 20 Número: 7 Páginas: 1919-1930 (2020)es_ES
Identifierdc.identifier.other10.5194/nhess-20-1919-2020
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/177205
Abstractdc.description.abstractOver the past decades, several numerical models have been developed to understand, simulate and predict debris flow events. Typically, these models simplify the complex interactions between water and solids using a single-phase approach and different rheological models to represent flow resistance. In this study, we perform a sensitivity analysis on the parameters of a debris flow numerical model (FLO-2D) for a suite of relevant variables (i.e., maximum flood area, maximum flow velocity, maximum height and deposit volume). Our aims are to (i) examine the degree of model overparameterization and (ii) assess the effectiveness of observational constraints to improve parameter identifiability. We use the Distributed Evaluation of Local Sensitivity Analysis (DELSA) method, which is a hybrid local-global technique. Specifically, we analyze two creeks in northern Chile (similar to 29 degrees S, 70 degrees W) that were affected by debris flows on 25 March 2015. Our results show that SD (surface detention) and beta(1) (a parameter related to viscosity) provide the largest sensitivities. Further, our results demonstrate that equifinality is present in FLO-2D and that the final deposited volume and maximum flood area contain considerable information to identify model parameters.es_ES
Patrocinadordc.description.sponsorshipFaculty of Physical and Mathematical Sciences of the Universidad de Chile through the Advanced Mining Technology Center (AMTC)es_ES
Lenguagedc.language.isoenes_ES
Publisherdc.publisherCopernicus Gesellschaftes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
Sourcedc.sourceNatural Hazards and Earth System Scienceses_ES
Keywordsdc.subjectSimulationes_ES
Keywordsdc.subjectFLO-2Des_ES
Títulodc.titleSensitivity and identifiability of rheological parameters in debris flow modelinges_ES
Document typedc.typeArtículo de revistaes_ES
dcterms.accessRightsdcterms.accessRightsAcceso Abierto
Catalogueruchile.catalogadorcrbes_ES
Indexationuchile.indexArtículo de publicación ISI
Indexationuchile.indexArtículo de publicación SCOPUS


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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile