Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, Argentina

ABSTRACT On February 2009 intense rainfall triggered landslides in the Tartagal River basin that evolved into a debris flow that caused severe flooding in the town of Tartagal, Salta, Argentina. Based on these events, this paper presents a first attempt to map the landslides susceptibility in the Ta...

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Autores principales:	Cardozo,Claudia Paola, Toyos,Guillermo, Baumann,Valérie
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2021
Materias:	Landslides Satellite image classification Conditioning factors Heuristic modelling Susceptibility zonation Sierras Subandinas
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062021000100075
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spelling	oai:scielo:S0718-710620210001000752021-02-11Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, ArgentinaCardozo,Claudia PaolaToyos,GuillermoBaumann,Valérie Landslides Satellite image classification Conditioning factors Heuristic modelling Susceptibility zonation Sierras Subandinas ABSTRACT On February 2009 intense rainfall triggered landslides in the Tartagal River basin that evolved into a debris flow that caused severe flooding in the town of Tartagal, Salta, Argentina. Based on these events, this paper presents a first attempt to map the landslides susceptibility in the Tartagal River basin. First, we elaborated an inventory map by using a 10 m pixel SPOT image acquired just after the disaster. Second, we evaluated a set of conditioning factors, which included lithology, slope and curvature; we derived the topographical variables from a 12.5 m pixel digital elevation model (DEM) based on a stereo-pair of satellite images ALOS-PRISM. Finally, we used these conditioning factors and the 2009 landslides inventory map as input for a heuristic model to elaborate the susceptibility map. The results indicated that landslides affected an area of 8 km2 and that at least 2.2x106 m3 of material were removed. The susceptibility map identified zones of low, moderate, high and very high susceptibility that occupied 18, 22, 25 and 17 km2, respectively. Accuracy assessment using data covering landslides occurred in 2006 showed that 95% of them fell within the high and very high susceptibility areas. The results presented herein provide vital baseline information for future studies and may contribute for the development of landslide hazard mitigation strategies.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.48 n.1 20212021-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062021000100075en10.5027/andgeov48n1-3242
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Landslides Satellite image classification Conditioning factors Heuristic modelling Susceptibility zonation Sierras Subandinas
spellingShingle	Landslides Satellite image classification Conditioning factors Heuristic modelling Susceptibility zonation Sierras Subandinas Cardozo,Claudia Paola Toyos,Guillermo Baumann,Valérie Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, Argentina
description	ABSTRACT On February 2009 intense rainfall triggered landslides in the Tartagal River basin that evolved into a debris flow that caused severe flooding in the town of Tartagal, Salta, Argentina. Based on these events, this paper presents a first attempt to map the landslides susceptibility in the Tartagal River basin. First, we elaborated an inventory map by using a 10 m pixel SPOT image acquired just after the disaster. Second, we evaluated a set of conditioning factors, which included lithology, slope and curvature; we derived the topographical variables from a 12.5 m pixel digital elevation model (DEM) based on a stereo-pair of satellite images ALOS-PRISM. Finally, we used these conditioning factors and the 2009 landslides inventory map as input for a heuristic model to elaborate the susceptibility map. The results indicated that landslides affected an area of 8 km2 and that at least 2.2x106 m3 of material were removed. The susceptibility map identified zones of low, moderate, high and very high susceptibility that occupied 18, 22, 25 and 17 km2, respectively. Accuracy assessment using data covering landslides occurred in 2006 showed that 95% of them fell within the high and very high susceptibility areas. The results presented herein provide vital baseline information for future studies and may contribute for the development of landslide hazard mitigation strategies.
author	Cardozo,Claudia Paola Toyos,Guillermo Baumann,Valérie
author_facet	Cardozo,Claudia Paola Toyos,Guillermo Baumann,Valérie
author_sort	Cardozo,Claudia Paola
title	Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, Argentina
title_short	Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, Argentina
title_full	Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, Argentina
title_fullStr	Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, Argentina
title_full_unstemmed	Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, Argentina
title_sort	landslide susceptibility zonation in the tartagal river basin, sierras subandinas, salta, argentina
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062021000100075
work_keys_str_mv	AT cardozoclaudiapaola landslidesusceptibilityzonationinthetartagalriverbasinsierrassubandinassaltaargentina AT toyosguillermo landslidesusceptibilityzonationinthetartagalriverbasinsierrassubandinassaltaargentina AT baumannvalerie landslidesusceptibilityzonationinthetartagalriverbasinsierrassubandinassaltaargentina
_version_	1714205870209892352

Landslide susceptibility zonation in the Tartagal River basin, Sierras Subandinas, Salta, Argentina

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