A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river

Understanding the effects of human disturbance on the bedload transport regime of anthropised rivers is a topic of growing importance, as such information is of interest for adequate river diagnosis, correct implementation of restoration measures and appropriate design of post-action monitoring prog...

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Autores: Bulteau, Théo, Vázquez-Tarrío, Daniel, Batalla, Ramon J., Piégay, Hervé
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2024
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:10459.1/466781
Acesso em linha:https://doi.org/10.1002/esp.5945
https://hdl.handle.net/10459.1/466781
Access Level:acceso abierto
Palavra-chave:Bedload regime
Garonne River
Gravel-bed rivers
Tracer clasts
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spelling A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed riverBulteau, ThéoVázquez-Tarrío, DanielBatalla, Ramon J.Piégay, HervéBedload regimeGaronne RiverGravel-bed riversTracer clastsUnderstanding the effects of human disturbance on the bedload transport regime of anthropised rivers is a topic of growing importance, as such information is of interest for adequate river diagnosis, correct implementation of restoration measures and appropriate design of post-action monitoring programs. However, such assessments are complex, especially in sites where multiple factors simultaneously influence the bedload transport regime, so that it is difficult to establish simple causal relationships between human disturbances and changes in the sediment transport regime, notably on bedload. To overcome this, there is a need for rigorous hypothesis-driven approaches to assess the isolated effects of each driver. With this in mind, we have characterised the dynamics of bedload transport in the Upper Garonne (Central Pyrenees, Spain-France), a river impacted by sediment retention, flow diversion and mining that influence its morphological conditions and transport regime. We assessed the effects of (1) surface grain size distribution, (2) river morphology, (3) sediment supply and (4) flow diversion on the bedload transport regime. Four sites with different degrees of river anthropisation were selected. After defining hypotheses on the most likely bedload transport conditions for each site, we proposed a set of discriminating criteria to test these hypotheses, based on temporal within-site and spatial between-site comparisons of coarse particle tracking measurements over four years. The results of this research showed that the hydrosedimentary regime of the Garonne is controlled by a complex combination of drivers such as valley physiography, which exerts a first-order control on differences in reach-scale bedforms and bedload dynamics; and human disturbances which contribute to a reduction in sediment supply through changes in land cover and hydropower dams, or to changes in hydrology (i.e., flow competence) due to water diversion and abstraction.Agence Nationale de la Recherche (French National Research Agency), Grant/Award Number: EUR H2O’Lyon (ANR-17-EURE0018); Spanish General Directorate for Water (DGA-MITERD), Grant/Award Number: 20223TE012IGME-CSIC; Economy and Knowledge Department of the Catalan Government; Région Auvergne-Rhône-Alpes; Electricité de France; Université de Lyon; Ministry of Science, Innovation and UniversitieWiley2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.1002/esp.5945https://hdl.handle.net/10459.1/466781reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a https://doi.org/10.1002/esp.5945Earth Surface Processes and Landforms, 2024, vol. 49, núm. 12, p. 3913–3933cc-by-nc (c) Bulteau et al., 2024Attribution-NoDerivatives 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nd/4.0/oai:recercat.cat:10459.1/4667812026-05-29T05:05:01Z
dc.title.none.fl_str_mv A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river
title A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river
spellingShingle A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river
Bulteau, Théo
Bedload regime
Garonne River
Gravel-bed rivers
Tracer clasts
title_short A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river
title_full A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river
title_fullStr A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river
title_full_unstemmed A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river
title_sort A multi-site and hypothesis-driven approach to identify controls on the bedload transport regime of an anthropised gravel-bed river
dc.creator.none.fl_str_mv Bulteau, Théo
Vázquez-Tarrío, Daniel
Batalla, Ramon J.
Piégay, Hervé
author Bulteau, Théo
author_facet Bulteau, Théo
Vázquez-Tarrío, Daniel
Batalla, Ramon J.
Piégay, Hervé
author_role author
author2 Vázquez-Tarrío, Daniel
Batalla, Ramon J.
Piégay, Hervé
author2_role author
author
author
dc.subject.none.fl_str_mv Bedload regime
Garonne River
Gravel-bed rivers
Tracer clasts
topic Bedload regime
Garonne River
Gravel-bed rivers
Tracer clasts
description Understanding the effects of human disturbance on the bedload transport regime of anthropised rivers is a topic of growing importance, as such information is of interest for adequate river diagnosis, correct implementation of restoration measures and appropriate design of post-action monitoring programs. However, such assessments are complex, especially in sites where multiple factors simultaneously influence the bedload transport regime, so that it is difficult to establish simple causal relationships between human disturbances and changes in the sediment transport regime, notably on bedload. To overcome this, there is a need for rigorous hypothesis-driven approaches to assess the isolated effects of each driver. With this in mind, we have characterised the dynamics of bedload transport in the Upper Garonne (Central Pyrenees, Spain-France), a river impacted by sediment retention, flow diversion and mining that influence its morphological conditions and transport regime. We assessed the effects of (1) surface grain size distribution, (2) river morphology, (3) sediment supply and (4) flow diversion on the bedload transport regime. Four sites with different degrees of river anthropisation were selected. After defining hypotheses on the most likely bedload transport conditions for each site, we proposed a set of discriminating criteria to test these hypotheses, based on temporal within-site and spatial between-site comparisons of coarse particle tracking measurements over four years. The results of this research showed that the hydrosedimentary regime of the Garonne is controlled by a complex combination of drivers such as valley physiography, which exerts a first-order control on differences in reach-scale bedforms and bedload dynamics; and human disturbances which contribute to a reduction in sediment supply through changes in land cover and hydropower dams, or to changes in hydrology (i.e., flow competence) due to water diversion and abstraction.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1002/esp.5945
https://hdl.handle.net/10459.1/466781
url https://doi.org/10.1002/esp.5945
https://hdl.handle.net/10459.1/466781
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a https://doi.org/10.1002/esp.5945
Earth Surface Processes and Landforms, 2024, vol. 49, núm. 12, p. 3913–3933
dc.rights.none.fl_str_mv cc-by-nc (c) Bulteau et al., 2024
Attribution-NoDerivatives 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nd/4.0/
rights_invalid_str_mv cc-by-nc (c) Bulteau et al., 2024
Attribution-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nd/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
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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score 15.812455

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