Outburst floods provide erodability estimates consistent with long-term landscape evolution

Most current models for the landscape evolution over geological timescales are based on semi-empirical laws that consider riverbed incision proportional to rock erodability (dependent on lithology) and to the work performed by water flow (stream power). However, the erodability values obtained from...

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Detalles Bibliográficos
Autores: García-Castellanos, Daniel, O'Connor, Jim E.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/169189
Acceso en línea:http://hdl.handle.net/10261/169189
Access Level:acceso abierto
Palabra clave:geological timescales
erodability
hydrology
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spelling Outburst floods provide erodability estimates consistent with long-term landscape evolutionGarcía-Castellanos, DanielO'Connor, Jim E.geological timescaleserodabilityhydrologyMost current models for the landscape evolution over geological timescales are based on semi-empirical laws that consider riverbed incision proportional to rock erodability (dependent on lithology) and to the work performed by water flow (stream power). However, the erodability values obtained from these models are entangled with poorly known conditions of past climate and streamflow. Here we use the erosion reported for 82 outburst floods triggered by overtopping lakes as a way to estimate the outlet erodability. This avoids the common assumptions regarding past hydrology because water discharge from overtopping floods is often well constrained from geomorphological evidence along the spillway. This novel methodology yields values of erodability that show a quantitative relation to lithology similar to previous river erosion analyses, expanding the range of hydrological and temporal scales of fluvial incision models and suggesting some consistency between the mathematical formulations of long-term and catastrophic erosional mechanisms. Our results also clarify conditions leading to the runaway erosion responsible for outburst floods triggered by overtopping lakes.Funding was provided by the Spanish Government and the European Union through the projects SaltGiant (H2020 #765256), TECLA (CGL2011–26670) and MITE (CGL2014-59516) and through a Salvador de Madariaga grant (PR2011-0044).Peer reviewedSpringer NatureEuropean CommissionGarcía-Castellanos, Daniel [0000-0001-8454-8572]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201820182018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/169189reponame: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/EC/H2020/765256info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2014-59516-Phttps://doi.org/10.1038/s41598-018-28981-ySíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1691892026-05-22T06:33:51Z
dc.title.none.fl_str_mv Outburst floods provide erodability estimates consistent with long-term landscape evolution
title Outburst floods provide erodability estimates consistent with long-term landscape evolution
spellingShingle Outburst floods provide erodability estimates consistent with long-term landscape evolution
García-Castellanos, Daniel
geological timescales
erodability
hydrology
title_short Outburst floods provide erodability estimates consistent with long-term landscape evolution
title_full Outburst floods provide erodability estimates consistent with long-term landscape evolution
title_fullStr Outburst floods provide erodability estimates consistent with long-term landscape evolution
title_full_unstemmed Outburst floods provide erodability estimates consistent with long-term landscape evolution
title_sort Outburst floods provide erodability estimates consistent with long-term landscape evolution
dc.creator.none.fl_str_mv García-Castellanos, Daniel
O'Connor, Jim E.
author García-Castellanos, Daniel
author_facet García-Castellanos, Daniel
O'Connor, Jim E.
author_role author
author2 O'Connor, Jim E.
author2_role author
dc.contributor.none.fl_str_mv European Commission
García-Castellanos, Daniel [0000-0001-8454-8572]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv geological timescales
erodability
hydrology
topic geological timescales
erodability
hydrology
description Most current models for the landscape evolution over geological timescales are based on semi-empirical laws that consider riverbed incision proportional to rock erodability (dependent on lithology) and to the work performed by water flow (stream power). However, the erodability values obtained from these models are entangled with poorly known conditions of past climate and streamflow. Here we use the erosion reported for 82 outburst floods triggered by overtopping lakes as a way to estimate the outlet erodability. This avoids the common assumptions regarding past hydrology because water discharge from overtopping floods is often well constrained from geomorphological evidence along the spillway. This novel methodology yields values of erodability that show a quantitative relation to lithology similar to previous river erosion analyses, expanding the range of hydrological and temporal scales of fluvial incision models and suggesting some consistency between the mathematical formulations of long-term and catastrophic erosional mechanisms. Our results also clarify conditions leading to the runaway erosion responsible for outburst floods triggered by overtopping lakes.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
2018
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/10261/169189
url http://hdl.handle.net/10261/169189
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/EC/H2020/765256
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2014-59516-P
https://doi.org/10.1038/s41598-018-28981-y
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
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
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