Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)

[EN] The 2021 Navalacruz wildfire occurred in a mountainous area in the Sistema Central (Spain). Despite having an average low severity index (dNBR), the loss of vegetation cover associated with the fire was responsible for a high rate of sedimentation in the rivers and streams. Additionally, the bu...

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Autores: Ortega-Becerril, Jose A., Suárez, Clara, Vázquez Tarrío, Daniel, Garrote, Julio, Gómez-Heras, Miguel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/349077
Acceso en línea:http://hdl.handle.net/10261/349077
Access Level:acceso abierto
Palabra clave:Wildfires
Sediment yiedl
Hydrophobicity
Curve number
Erosion
Rock weathering
Floods
Cultural heritage
River morphology
Debris flow
Provincia Ávila
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repository_id_str
spelling Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)Ortega-Becerril, Jose A.Suárez, ClaraVázquez Tarrío, DanielGarrote, JulioGómez-Heras, MiguelWildfiresSediment yiedlHydrophobicityCurve numberErosionRock weatheringFloodsCultural heritageRiver morphologyDebris flowProvincia Ávila[EN] The 2021 Navalacruz wildfire occurred in a mountainous area in the Sistema Central (Spain). Despite having an average low severity index (dNBR), the loss of vegetation cover associated with the fire was responsible for a high rate of sedimentation in the rivers and streams. Additionally, the burned area affected up to 60 cultural heritage sites, including archaeological and ethnological sites, and damage ranged from burnt pieces of wood to the burial of archaeological sites. In the present work, we document and analyze the post-fire evolution in several rivers and streams. This is based on a field survey of infiltration rates, hydrodynamic modeling, and the study of channel morphological changes. Our analysis revealed how the first post-fire rains caused the mobilization and transport of ashes. This created hydrophobicity in the soils, resulting in large amounts of materials being transported to rivers and streams by subsequent medium- and low-magnitude storms. A hydrological and hydraulic model of the study catchments under pre- and post-fire conditions suggests that these trends are a consequence of a post-fire increase in flow rates for similar rainfall scenarios. In this respect, our estimates point at a significant increase in sediment transport capacities associated with this post-fire increase in flow rates. The combination of locally steep slopes with high-severity fire patches, and a considerable regolith (derived from pre-fire weathering), resulted in a series of cascading responses, such as an exacerbated supply of sand to the drainage network and the triggering of debris flows, followed by erosion and entrenchment.This research was funded by MCIN/AEI/10.13039/501100011033, grant numbers PID2020-116896RB-C21 and PID2020-116896RBC22, provided by MCIN/AEI/10.13039/501100011033.Peer reviewedMultidisciplinary Digital Publishing InstituteAgencia Estatal de Investigación (España)Ortega-Becerril, Jose A. [0000-0003-2722-5077]Vázquez Tarrio, Daniel [0000-0002-5658-4426]Garrote, Julio [0000-0002-7727-8014]Gómez-Heras, Miguel [0000-0001-8272-2362]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/349077reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116896RB-C21info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116896RB-C22https://doi.org/10.3390/fire7020052Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3490772026-05-22T06:33:51Z
dc.title.none.fl_str_mv Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)
title Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)
spellingShingle Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)
Ortega-Becerril, Jose A.
Wildfires
Sediment yiedl
Hydrophobicity
Curve number
Erosion
Rock weathering
Floods
Cultural heritage
River morphology
Debris flow
Provincia Ávila
title_short Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)
title_full Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)
title_fullStr Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)
title_full_unstemmed Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)
title_sort Sediment Response after Wildfires in Mountain Streams and Their Effects on Cultural Heritage: the Case of the 2021 Navalacruz Wildfire (Avila, Spain)
dc.creator.none.fl_str_mv Ortega-Becerril, Jose A.
Suárez, Clara
Vázquez Tarrío, Daniel
Garrote, Julio
Gómez-Heras, Miguel
author Ortega-Becerril, Jose A.
author_facet Ortega-Becerril, Jose A.
Suárez, Clara
Vázquez Tarrío, Daniel
Garrote, Julio
Gómez-Heras, Miguel
author_role author
author2 Suárez, Clara
Vázquez Tarrío, Daniel
Garrote, Julio
Gómez-Heras, Miguel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Ortega-Becerril, Jose A. [0000-0003-2722-5077]
Vázquez Tarrio, Daniel [0000-0002-5658-4426]
Garrote, Julio [0000-0002-7727-8014]
Gómez-Heras, Miguel [0000-0001-8272-2362]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Wildfires
Sediment yiedl
Hydrophobicity
Curve number
Erosion
Rock weathering
Floods
Cultural heritage
River morphology
Debris flow
Provincia Ávila
topic Wildfires
Sediment yiedl
Hydrophobicity
Curve number
Erosion
Rock weathering
Floods
Cultural heritage
River morphology
Debris flow
Provincia Ávila
description [EN] The 2021 Navalacruz wildfire occurred in a mountainous area in the Sistema Central (Spain). Despite having an average low severity index (dNBR), the loss of vegetation cover associated with the fire was responsible for a high rate of sedimentation in the rivers and streams. Additionally, the burned area affected up to 60 cultural heritage sites, including archaeological and ethnological sites, and damage ranged from burnt pieces of wood to the burial of archaeological sites. In the present work, we document and analyze the post-fire evolution in several rivers and streams. This is based on a field survey of infiltration rates, hydrodynamic modeling, and the study of channel morphological changes. Our analysis revealed how the first post-fire rains caused the mobilization and transport of ashes. This created hydrophobicity in the soils, resulting in large amounts of materials being transported to rivers and streams by subsequent medium- and low-magnitude storms. A hydrological and hydraulic model of the study catchments under pre- and post-fire conditions suggests that these trends are a consequence of a post-fire increase in flow rates for similar rainfall scenarios. In this respect, our estimates point at a significant increase in sediment transport capacities associated with this post-fire increase in flow rates. The combination of locally steep slopes with high-severity fire patches, and a considerable regolith (derived from pre-fire weathering), resulted in a series of cascading responses, such as an exacerbated supply of sand to the drainage network and the triggering of debris flows, followed by erosion and entrenchment.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/349077
url http://hdl.handle.net/10261/349077
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116896RB-C21
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116896RB-C22
https://doi.org/10.3390/fire7020052
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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