The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river

Studies of ephemeral streams have focused mainly in arid and semi‐arid regions. Such streams also occur widely in temperate regions, but much less is known about their influence on fluvial processes in main‐stem rivers here. In this paper, we present evidence of the importance of a small ephemeral t...

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Detalhes bibliográficos
Autores: Marteau, Baptiste, Batalla, Ramon J., Vericat Querol, Damià, Gibbins, Chris N.
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
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:10459.1/69373
Acesso em linha:https://doi.org/10.1002/rra.3177
http://hdl.handle.net/10459.1/69373
Access Level:acceso abierto
Palavra-chave:Channel reconnection
Ephemeral stream
Regulated river
River restoration
Suspended fine sediment
Temperate region
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spelling The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem riverMarteau, BaptisteBatalla, Ramon J.Vericat Querol, DamiàGibbins, Chris N.Channel reconnectionEphemeral streamRegulated riverRiver restorationSuspended fine sedimentTemperate regionStudies of ephemeral streams have focused mainly in arid and semi‐arid regions. Such streams also occur widely in temperate regions, but much less is known about their influence on fluvial processes in main‐stem rivers here. In this paper, we present evidence of the importance of a small ephemeral temperate stream for main‐stem fine sediment dynamics. The paper focuses on a restoration project (River Ehen, North West England) which involved the reconnection of a headwater tributary to the main‐stem river. We present data on suspended sediment transport 2 years prior to and 2 years following the reconnection. Despite the small size and non‐perennial flow of the tributary, its reconnection resulted in an increase of 65% in the main‐stem sediment yield. During both the pre‐reconnection and post‐reconnection periods, a higher proportion of the annual yield was conveyed during short events with relatively high suspended sediment concentrations. Following the reconnection, the magnitude and frequency of such events increased, primarily due to sediment being delivered from the tributary at times when main‐stem flows were not elevated. Overall, the main‐stem remains supply limited and so is highly dependent on sediment delivered from the tributary. The study helps stress that even non‐perennial tributaries yielding only a small increase in catchment size (+1.2% in this case) can have a major influence on main‐stem fluvial dynamics. Their role as sediment sources may be especially important where, as in the case of the Ehen, the main‐stem is regulated and the system is otherwise starved of sediment.Damià Vericat is funded by a Ramon y Cajal Fellowship (RYC‐2010‐06264). Authors acknowledge the support from the Economy and Knowledge Department of the Catalan Government through the Consolidated Research Group “Fluvial Dynamics Research Group”—RIUS (2014 SGR 645), and the additional support provided by the CERCA Programme, also from the Catalan Government.John Wiley & Sons202020202017info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttps://doi.org/10.1002/rra.3177http://hdl.handle.net/10459.1/69373http://hdl.handle.net/10459.1/69373reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1002/rra.3177River Research and Applications, 2017, vol. 33, núm. 10, p. 1564-1574(c) John Wiley & Sons, 2017info:eu-repo/semantics/openAccessoai:recercat.cat:10459.1/693732026-05-29T05:05:01Z
dc.title.none.fl_str_mv The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river
title The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river
spellingShingle The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river
Marteau, Baptiste
Channel reconnection
Ephemeral stream
Regulated river
River restoration
Suspended fine sediment
Temperate region
title_short The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river
title_full The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river
title_fullStr The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river
title_full_unstemmed The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river
title_sort The importance of a small ephemeral tributary for fine sediment dynamics in a main‐stem river
dc.creator.none.fl_str_mv Marteau, Baptiste
Batalla, Ramon J.
Vericat Querol, Damià
Gibbins, Chris N.
author Marteau, Baptiste
author_facet Marteau, Baptiste
Batalla, Ramon J.
Vericat Querol, Damià
Gibbins, Chris N.
author_role author
author2 Batalla, Ramon J.
Vericat Querol, Damià
Gibbins, Chris N.
author2_role author
author
author
dc.subject.none.fl_str_mv Channel reconnection
Ephemeral stream
Regulated river
River restoration
Suspended fine sediment
Temperate region
topic Channel reconnection
Ephemeral stream
Regulated river
River restoration
Suspended fine sediment
Temperate region
description Studies of ephemeral streams have focused mainly in arid and semi‐arid regions. Such streams also occur widely in temperate regions, but much less is known about their influence on fluvial processes in main‐stem rivers here. In this paper, we present evidence of the importance of a small ephemeral temperate stream for main‐stem fine sediment dynamics. The paper focuses on a restoration project (River Ehen, North West England) which involved the reconnection of a headwater tributary to the main‐stem river. We present data on suspended sediment transport 2 years prior to and 2 years following the reconnection. Despite the small size and non‐perennial flow of the tributary, its reconnection resulted in an increase of 65% in the main‐stem sediment yield. During both the pre‐reconnection and post‐reconnection periods, a higher proportion of the annual yield was conveyed during short events with relatively high suspended sediment concentrations. Following the reconnection, the magnitude and frequency of such events increased, primarily due to sediment being delivered from the tributary at times when main‐stem flows were not elevated. Overall, the main‐stem remains supply limited and so is highly dependent on sediment delivered from the tributary. The study helps stress that even non‐perennial tributaries yielding only a small increase in catchment size (+1.2% in this case) can have a major influence on main‐stem fluvial dynamics. Their role as sediment sources may be especially important where, as in the case of the Ehen, the main‐stem is regulated and the system is otherwise starved of sediment.
publishDate 2017
dc.date.none.fl_str_mv 2017
2020
2020
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/10.1002/rra.3177
http://hdl.handle.net/10459.1/69373
http://hdl.handle.net/10459.1/69373
url https://doi.org/10.1002/rra.3177
http://hdl.handle.net/10459.1/69373
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1002/rra.3177
River Research and Applications, 2017, vol. 33, núm. 10, p. 1564-1574
dc.rights.none.fl_str_mv (c) John Wiley & Sons, 2017
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) John Wiley & Sons, 2017
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
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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