Bed-material entrainment in a mountain river affected by hydropeaking

Hydropeaking, by artificially generated flow peaks, influences hydro-sedimentary dynamics on rivers and, consequently, affects bed material entrainment and transport. This study examines the onset of motion of sediment particles in four sections of a Pyrenean gravel-to-cobble bed river exposed to fr...

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Autores: López Alonso, Raúl, Ville, Fanny, Garcia, Celso, Batalla, Ramon J., Vericat Querol, Damià
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/84008
Acceso en línea:https://doi.org/10.1016/j.scitotenv.2022.159065
http://hdl.handle.net/10459.1/84008
Access Level:acceso abierto
Palabra clave:sediment
Hydropeaking
mountain rivers
Gravel-bed river
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spelling Bed-material entrainment in a mountain river affected by hydropeakingLópez Alonso, RaúlVille, FannyGarcia, CelsoBatalla, Ramon J.Vericat Querol, DamiàsedimentHydropeakingmountain riversGravel-bed riverHydropeaking, by artificially generated flow peaks, influences hydro-sedimentary dynamics on rivers and, consequently, affects bed material entrainment and transport. This study examines the onset of motion of sediment particles in four sections of a Pyrenean gravel-to-cobble bed river exposed to frequent hydropeaking (once per day, on average). Five criteria of particle entrainment have been used to assess the prediction of the initiation of grain motion at-a-section scale. Theoretical entrainment conditions were validated using real observations of mobility by means of tracers. It was found that the maximum flow discharged by the hydropower plant mostly affects the furthest downstream section, located almost 17 km downstream, in which the finer fractions of the bed are entrained. The mobile grain sizes include up to coarse gravels (≈ 30 mm). Differences in sediment supply (imposed by tributaries), the value of the bed slope and the structure of the coarse surface layer decisively control the downstream variability of incipient particle motion between sections. Results from a 17 km study segment indicated that hydropeaking generate partial transport, that is, a partially size-selective transport that occurs downstream from the hydropower plant and winnows the sand and small gravel further downstream, increasing armouring and depleting fine sediments.This research was undertaken under the MorphHab (PID2019-104979RB-I00/AEI/10.13039/501100011033) and MorphPeak (CGL2016-78874-R/AEI/10.13039/501100011033) research projects funded by the Spanish State Research Agency (Ministry of Science and Innovation) and the European Regional Development Fund Scheme (FEDER). The last author is a Serra Húnter Fellow at the University of Lleida. We also acknowledge all support provided by the Ebro Water Authorities (CHE), including the Automatic Hydrologic Information System of the Ebro river basin (SAIH) and the company Acciona for providing information regarding hydropeaks.Elsevier2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.1016/j.scitotenv.2022.159065http://hdl.handle.net/10459.1/84008reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104979RB-I00info:eu-repo/grantAgreement/AEI//CGL2016-78874-RReproducció del document publicat a: https://doi.org/10.1016/j.scitotenv.2022.159065Science of the Total Environment, 2023, vol. 856, Part 1cc-by-nc-nd (c) López et al., 2023info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/oai:repositori.udl.cat:10459.1/840082026-06-24T12:42:17Z
dc.title.none.fl_str_mv Bed-material entrainment in a mountain river affected by hydropeaking
title Bed-material entrainment in a mountain river affected by hydropeaking
spellingShingle Bed-material entrainment in a mountain river affected by hydropeaking
López Alonso, Raúl
sediment
Hydropeaking
mountain rivers
Gravel-bed river
title_short Bed-material entrainment in a mountain river affected by hydropeaking
title_full Bed-material entrainment in a mountain river affected by hydropeaking
title_fullStr Bed-material entrainment in a mountain river affected by hydropeaking
title_full_unstemmed Bed-material entrainment in a mountain river affected by hydropeaking
title_sort Bed-material entrainment in a mountain river affected by hydropeaking
dc.creator.none.fl_str_mv López Alonso, Raúl
Ville, Fanny
Garcia, Celso
Batalla, Ramon J.
Vericat Querol, Damià
author López Alonso, Raúl
author_facet López Alonso, Raúl
Ville, Fanny
Garcia, Celso
Batalla, Ramon J.
Vericat Querol, Damià
author_role author
author2 Ville, Fanny
Garcia, Celso
Batalla, Ramon J.
Vericat Querol, Damià
author2_role author
author
author
author
dc.subject.none.fl_str_mv sediment
Hydropeaking
mountain rivers
Gravel-bed river
topic sediment
Hydropeaking
mountain rivers
Gravel-bed river
description Hydropeaking, by artificially generated flow peaks, influences hydro-sedimentary dynamics on rivers and, consequently, affects bed material entrainment and transport. This study examines the onset of motion of sediment particles in four sections of a Pyrenean gravel-to-cobble bed river exposed to frequent hydropeaking (once per day, on average). Five criteria of particle entrainment have been used to assess the prediction of the initiation of grain motion at-a-section scale. Theoretical entrainment conditions were validated using real observations of mobility by means of tracers. It was found that the maximum flow discharged by the hydropower plant mostly affects the furthest downstream section, located almost 17 km downstream, in which the finer fractions of the bed are entrained. The mobile grain sizes include up to coarse gravels (≈ 30 mm). Differences in sediment supply (imposed by tributaries), the value of the bed slope and the structure of the coarse surface layer decisively control the downstream variability of incipient particle motion between sections. Results from a 17 km study segment indicated that hydropeaking generate partial transport, that is, a partially size-selective transport that occurs downstream from the hydropower plant and winnows the sand and small gravel further downstream, increasing armouring and depleting fine sediments.
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.scitotenv.2022.159065
http://hdl.handle.net/10459.1/84008
url https://doi.org/10.1016/j.scitotenv.2022.159065
http://hdl.handle.net/10459.1/84008
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 2017-2020/PID2019-104979RB-I00
info:eu-repo/grantAgreement/AEI//CGL2016-78874-R
Reproducció del document publicat a: https://doi.org/10.1016/j.scitotenv.2022.159065
Science of the Total Environment, 2023, vol. 856, Part 1
dc.rights.none.fl_str_mv cc-by-nc-nd (c) López et al., 2023
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
rights_invalid_str_mv cc-by-nc-nd (c) López et al., 2023
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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