Estimating and restoring bedload transport through a run-of-river reservoir
Weirs or run-of-river dams can disrupt bedload transfer with negative ecological effects downstream due to sediment starvation. The way and the degree to which bedload is trapped is nevertheless not straightforward and few studies have examined this topic. This study focuses on a 13-km-long reservoi...
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| Veröffentlicht in: | The Science of the total environment 2019-03, Vol.654, p.1146-1157 |
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| creator | Dépret, Thomas Piégay, Hervé Dugué, Violaine Vaudor, Lise Faure, Jean-Baptiste Le Coz, Jérôme Camenen, Benoît |
| description | Weirs or run-of-river dams can disrupt bedload transfer with negative ecological effects downstream due to sediment starvation. The way and the degree to which bedload is trapped is nevertheless not straightforward and few studies have examined this topic. This study focuses on a 13-km-long reservoir of the Rhône River, France, created by a diversion dam equipped with bottom gates. Our main objective was to determine the degree of alteration of the bedload transfer downstream and to identify to which extent the implementation of Ecomorphogenic Flows (EmF), defined as environmental flows whose objective is specifically to increase bedload transfer through the reservoir to promote downstream habitat diversity, could increase bed mobility. The results show that the potential for morphological adjustments in the reservoir was already low before dam completion (1968) in response to a substantial decrease in coarse sediment supply, but that this potential was progressively reduced due to the impoundment. However, the bedload transfer continuity has been at least partially maintained since dam completion. According to numerical simulations, only particles smaller than medium gravels (d |
| doi_str_mv | 10.1016/j.scitotenv.2018.11.177 |
| format | Article |
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•Partial maintenance of bedload transfer through a run-of-river reservoir of a large gravel-bed river•Integrated approach combining sediment budgets and hydraulic modelling•Increase of bed mobility through implementation of environmental flows</description><identifier>ISSN: 0048-9697</identifier><identifier>EISSN: 1879-1026</identifier><identifier>DOI: 10.1016/j.scitotenv.2018.11.177</identifier><identifier>PMID: 30841389</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Bedload continuity ; Environmental flow ; Environmental Sciences ; Flow competence ; Impoundment ; Process-based restoration ; Run-of-river dam</subject><ispartof>The Science of the total environment, 2019-03, Vol.654, p.1146-1157</ispartof><rights>2018</rights><rights>Copyright © 2018. Published by Elsevier B.V.</rights><rights>Attribution - NonCommercial - NoDerivatives</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c454t-5b8a26ccd305c38f3af7bcc14d0f207031261265ccded15aed167f00a686408f3</citedby><cites>FETCH-LOGICAL-c454t-5b8a26ccd305c38f3af7bcc14d0f207031261265ccded15aed167f00a686408f3</cites><orcidid>0000-0003-1243-6955 ; 0000-0003-1677-5225 ; 0000-0001-6491-6112 ; 0000-0003-1844-6425 ; 0000-0002-3864-2119</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.scitotenv.2018.11.177$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,777,781,882,3537,27905,27906,45976</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/30841389$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.inrae.fr/hal-02608072$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Dépret, Thomas</creatorcontrib><creatorcontrib>Piégay, Hervé</creatorcontrib><creatorcontrib>Dugué, Violaine</creatorcontrib><creatorcontrib>Vaudor, Lise</creatorcontrib><creatorcontrib>Faure, Jean-Baptiste</creatorcontrib><creatorcontrib>Le Coz, Jérôme</creatorcontrib><creatorcontrib>Camenen, Benoît</creatorcontrib><title>Estimating and restoring bedload transport through a run-of-river reservoir</title><title>The Science of the total environment</title><addtitle>Sci Total Environ</addtitle><description>Weirs or run-of-river dams can disrupt bedload transfer with negative ecological effects downstream due to sediment starvation. The way and the degree to which bedload is trapped is nevertheless not straightforward and few studies have examined this topic. This study focuses on a 13-km-long reservoir of the Rhône River, France, created by a diversion dam equipped with bottom gates. Our main objective was to determine the degree of alteration of the bedload transfer downstream and to identify to which extent the implementation of Ecomorphogenic Flows (EmF), defined as environmental flows whose objective is specifically to increase bedload transfer through the reservoir to promote downstream habitat diversity, could increase bed mobility. The results show that the potential for morphological adjustments in the reservoir was already low before dam completion (1968) in response to a substantial decrease in coarse sediment supply, but that this potential was progressively reduced due to the impoundment. However, the bedload transfer continuity has been at least partially maintained since dam completion. According to numerical simulations, only particles smaller than medium gravels (d < 14 mm) could be exported downstream of the dam for relatively rare discharge (50-years return-interval flood). Implementation of EmF could neatly improve the bedload transfer since it would allow to strongly increase the competence: for a 2-years and a 50-years return-interval floods, the maximum particle size exportable downstream is respectively 9 and 4 times larger than for normal the reservoir operation.
[Display omitted]
•Partial maintenance of bedload transfer through a run-of-river reservoir of a large gravel-bed river•Integrated approach combining sediment budgets and hydraulic modelling•Increase of bed mobility through implementation of environmental flows</description><subject>Bedload continuity</subject><subject>Environmental flow</subject><subject>Environmental Sciences</subject><subject>Flow competence</subject><subject>Impoundment</subject><subject>Process-based restoration</subject><subject>Run-of-river dam</subject><issn>0048-9697</issn><issn>1879-1026</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqFkE-P0zAQxS0EYsvCV4Ac4ZAwkz-2c6xWC7uiEhc4W67tbF2lcRk7kfbb46hLr1iWR7Z-743nMfYJoUJA_vVYReNTSG5aqhpQVogVCvGKbVCKvkSo-Wu2AWhl2fNe3LB3MR4hLyHxLbtpQLbYyH7DftzH5E86-emp0JMtyMUUaL3tnR2DtkUiPcVzoFSkA4X56VDoguapDENJfnG0ShwtwdN79mbQY3QfXuot-_3t_tfdQ7n7-f3xbrsrTdu1qez2UtfcGNtAZxo5NHoQe2OwtTDUIKDBmufdZcJZ7HQ-uBgANJe8hczfsi8X34Me1Zny9-lZBe3Vw3an1rc8PUgQ9VJn9vOFPVP4M-fh1MlH48ZRTy7MUdUoZS9R9jyj4oIaCjGSG67eCGpNXR3VNXW1pq4QVU49Kz--NJn3J2evun8xZ2B7AVyOZfGOViM3GWc9OZOUDf6_Tf4CzVmYDA</recordid><startdate>20190301</startdate><enddate>20190301</enddate><creator>Dépret, Thomas</creator><creator>Piégay, Hervé</creator><creator>Dugué, Violaine</creator><creator>Vaudor, Lise</creator><creator>Faure, Jean-Baptiste</creator><creator>Le Coz, Jérôme</creator><creator>Camenen, Benoît</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0003-1243-6955</orcidid><orcidid>https://orcid.org/0000-0003-1677-5225</orcidid><orcidid>https://orcid.org/0000-0001-6491-6112</orcidid><orcidid>https://orcid.org/0000-0003-1844-6425</orcidid><orcidid>https://orcid.org/0000-0002-3864-2119</orcidid></search><sort><creationdate>20190301</creationdate><title>Estimating and restoring bedload transport through a run-of-river reservoir</title><author>Dépret, Thomas ; Piégay, Hervé ; Dugué, Violaine ; Vaudor, Lise ; Faure, Jean-Baptiste ; Le Coz, Jérôme ; Camenen, Benoît</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c454t-5b8a26ccd305c38f3af7bcc14d0f207031261265ccded15aed167f00a686408f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Bedload continuity</topic><topic>Environmental flow</topic><topic>Environmental Sciences</topic><topic>Flow competence</topic><topic>Impoundment</topic><topic>Process-based restoration</topic><topic>Run-of-river dam</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dépret, Thomas</creatorcontrib><creatorcontrib>Piégay, Hervé</creatorcontrib><creatorcontrib>Dugué, Violaine</creatorcontrib><creatorcontrib>Vaudor, Lise</creatorcontrib><creatorcontrib>Faure, Jean-Baptiste</creatorcontrib><creatorcontrib>Le Coz, Jérôme</creatorcontrib><creatorcontrib>Camenen, Benoît</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>The Science of the total environment</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dépret, Thomas</au><au>Piégay, Hervé</au><au>Dugué, Violaine</au><au>Vaudor, Lise</au><au>Faure, Jean-Baptiste</au><au>Le Coz, Jérôme</au><au>Camenen, Benoît</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Estimating and restoring bedload transport through a run-of-river reservoir</atitle><jtitle>The Science of the total environment</jtitle><addtitle>Sci Total Environ</addtitle><date>2019-03-01</date><risdate>2019</risdate><volume>654</volume><spage>1146</spage><epage>1157</epage><pages>1146-1157</pages><issn>0048-9697</issn><eissn>1879-1026</eissn><abstract>Weirs or run-of-river dams can disrupt bedload transfer with negative ecological effects downstream due to sediment starvation. The way and the degree to which bedload is trapped is nevertheless not straightforward and few studies have examined this topic. This study focuses on a 13-km-long reservoir of the Rhône River, France, created by a diversion dam equipped with bottom gates. Our main objective was to determine the degree of alteration of the bedload transfer downstream and to identify to which extent the implementation of Ecomorphogenic Flows (EmF), defined as environmental flows whose objective is specifically to increase bedload transfer through the reservoir to promote downstream habitat diversity, could increase bed mobility. The results show that the potential for morphological adjustments in the reservoir was already low before dam completion (1968) in response to a substantial decrease in coarse sediment supply, but that this potential was progressively reduced due to the impoundment. However, the bedload transfer continuity has been at least partially maintained since dam completion. According to numerical simulations, only particles smaller than medium gravels (d < 14 mm) could be exported downstream of the dam for relatively rare discharge (50-years return-interval flood). Implementation of EmF could neatly improve the bedload transfer since it would allow to strongly increase the competence: for a 2-years and a 50-years return-interval floods, the maximum particle size exportable downstream is respectively 9 and 4 times larger than for normal the reservoir operation.
[Display omitted]
•Partial maintenance of bedload transfer through a run-of-river reservoir of a large gravel-bed river•Integrated approach combining sediment budgets and hydraulic modelling•Increase of bed mobility through implementation of environmental flows</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>30841389</pmid><doi>10.1016/j.scitotenv.2018.11.177</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0003-1243-6955</orcidid><orcidid>https://orcid.org/0000-0003-1677-5225</orcidid><orcidid>https://orcid.org/0000-0001-6491-6112</orcidid><orcidid>https://orcid.org/0000-0003-1844-6425</orcidid><orcidid>https://orcid.org/0000-0002-3864-2119</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Bedload continuity Environmental flow Environmental Sciences Flow competence Impoundment Process-based restoration Run-of-river dam |
| title | Estimating and restoring bedload transport through a run-of-river reservoir |
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