Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano

In this paper, we retrace the geomorphological evolution of a 6.5 km-long segment of the Blanco Este River, which drains the Calbuco volcano in southern Chile, highlighting the geomorphic signatures of the disturbances caused by the 1961 and 2015 eruptions. In particular, we track the geomorphologic...

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Autores: Zingaretti, Valeria, Iroumé, Andrés, Llena, Manel, Mazzorana, Bruno, Vericat Querol, Damià, Batalla, Ramon J.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/464777
Acesso em linha:https://doi.org/10.1016/j.geomorph.2022.108570
https://hdl.handle.net/10459.1/464777
Access Level:acceso abierto
Palavra-chave:River channel morphology
Channel indices
Photogrammetry
Blanco Este River
Geomorfologia
Enginyeria fluvial
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oai_identifier_str oai:recercat.cat:10459.1/464777
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano
title Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano
spellingShingle Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano
Zingaretti, Valeria
River channel morphology
Channel indices
Photogrammetry
Blanco Este River
Geomorfologia
Enginyeria fluvial
title_short Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano
title_full Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano
title_fullStr Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano
title_full_unstemmed Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano
title_sort Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco Volcano
dc.creator.none.fl_str_mv Zingaretti, Valeria
Iroumé, Andrés
Llena, Manel
Mazzorana, Bruno
Vericat Querol, Damià
Batalla, Ramon J.
author Zingaretti, Valeria
author_facet Zingaretti, Valeria
Iroumé, Andrés
Llena, Manel
Mazzorana, Bruno
Vericat Querol, Damià
Batalla, Ramon J.
author_role author
author2 Iroumé, Andrés
Llena, Manel
Mazzorana, Bruno
Vericat Querol, Damià
Batalla, Ramon J.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv River channel morphology
Channel indices
Photogrammetry
Blanco Este River
Geomorfologia
Enginyeria fluvial
topic River channel morphology
Channel indices
Photogrammetry
Blanco Este River
Geomorfologia
Enginyeria fluvial
description In this paper, we retrace the geomorphological evolution of a 6.5 km-long segment of the Blanco Este River, which drains the Calbuco volcano in southern Chile, highlighting the geomorphic signatures of the disturbances caused by the 1961 and 2015 eruptions. In particular, we track the geomorphological changes and the evolution of the geomorphological units and discuss the underlying processes. In addition, we use the NDVI (Normalize Difference Vegetation Index) to characterise the vegetation recovery at the basin and the active channel scales. The reconstruction of the geomorphological changes is performed by means of photointerpretation and supervised classification image analysis. Moreover, we quantify braiding indices and active channel widths to characterise the fluvial corridor and to describe its evolution after the two eruptive events. It is found that the evolutionary trajectories of the Blanco River immediately after the eruptive events of 1961 and 2015 exhibited strong similarities. In fact, the major geomorphological adjustment of the Blanco Este River occurred during the first ten years after the 1961 eruption. Subsequently the river progressed gradually towards an advanced relaxation stage in 2014. For 53 years (between 1961 and 2014), the reduction of the active channel width was the dominant process, followed by erosion, which favoured the regeneration and consequent expansion of vegetation cover within the river corridor. The 2015 eruption reset the fluvial landform and a new cycle of sedimentation, braiding and formation of central bars began; the highly dynamic pattern is still observed today.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.geomorph.2022.108570
https://hdl.handle.net/10459.1/464777
url https://doi.org/10.1016/j.geomorph.2022.108570
https://hdl.handle.net/10459.1/464777
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2016-78874-R
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104979RB-I00
Versió postprint del document publicat a https://doi.org/10.1016/j.geomorph.2022.108570
Geomorphology, 2023, vol. 425, núm. 108570, p. 1-67
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier, 2023
Attribution-NonCommercial-NoDerivatives 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier, 2023
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Geomorphological evolution of the Blanco Este River after recent eruptions of the Calbuco VolcanoZingaretti, ValeriaIroumé, AndrésLlena, ManelMazzorana, BrunoVericat Querol, DamiàBatalla, Ramon J.River channel morphologyChannel indicesPhotogrammetryBlanco Este RiverGeomorfologiaEnginyeria fluvialIn this paper, we retrace the geomorphological evolution of a 6.5 km-long segment of the Blanco Este River, which drains the Calbuco volcano in southern Chile, highlighting the geomorphic signatures of the disturbances caused by the 1961 and 2015 eruptions. In particular, we track the geomorphological changes and the evolution of the geomorphological units and discuss the underlying processes. In addition, we use the NDVI (Normalize Difference Vegetation Index) to characterise the vegetation recovery at the basin and the active channel scales. The reconstruction of the geomorphological changes is performed by means of photointerpretation and supervised classification image analysis. Moreover, we quantify braiding indices and active channel widths to characterise the fluvial corridor and to describe its evolution after the two eruptive events. It is found that the evolutionary trajectories of the Blanco River immediately after the eruptive events of 1961 and 2015 exhibited strong similarities. In fact, the major geomorphological adjustment of the Blanco Este River occurred during the first ten years after the 1961 eruption. Subsequently the river progressed gradually towards an advanced relaxation stage in 2014. For 53 years (between 1961 and 2014), the reduction of the active channel width was the dominant process, followed by erosion, which favoured the regeneration and consequent expansion of vegetation cover within the river corridor. The 2015 eruption reset the fluvial landform and a new cycle of sedimentation, braiding and formation of central bars began; the highly dynamic pattern is still observed today.This research was developed within the framework of project FONDECYT 1200079 (PIROFLUV) led by Andrés Iroumé. Valeria Zingaretti acknowledges the support of a PhD scholarship by the Agencia Nacional de Investigación y Desarrollo (ANID, Chile) and the Graduate School, Faculty of Forest Sciences and Natural Resources, Universidad Austral de Chile. Part of the methods have been developed based on previous research performed in the research projects MorphSed (CGL2016-78874-R/AEI/10.13039/501100011033) and MorphHab (PID2019-104979RB-I00/AEI/10.13039/501100011033). We acknowledge the support of the Projcet Fondecyt-ANID Nr. 1200091 “Unravelling the dynamics and impacts of sediment-laden flows in urban areas in southern Chile as a basis for innovative adaptation (SEDIMPACT)” led by Bruno Mazzorana. Damià Vericat is funded through the Serra Húnter Programme (Catalan Government). Ramon J. Batalla, Damià Vericat and Manel Llena participated with the support of the Economy and Knowledge Department of the Catalan Government through the Consolidated Research Group ‘Fluvial Dynamics Research Group’ - RIUS (2017SGR-0459) and the CERCA Program. Authors acknowledge the support of the Hémera Earth Observation Center of the Universidad Mayor (Santiago, Chile) for providing access to aerial photographs.Elsevier2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttps://doi.org/10.1016/j.geomorph.2022.108570https://hdl.handle.net/10459.1/464777reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2016-78874-Rinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104979RB-I00Versió postprint del document publicat a https://doi.org/10.1016/j.geomorph.2022.108570Geomorphology, 2023, vol. 425, núm. 108570, p. 1-67cc-by-nc-nd (c) Elsevier, 2023Attribution-NonCommercial-NoDerivatives 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/oai:recercat.cat:10459.1/4647772026-05-29T05:05:01Z
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