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dc.contributor.author
Rachelly, Cristina
dc.contributor.author
Albayrak, Ismail
dc.contributor.author
Boes, Robert M.
dc.contributor.author
Weitbrecht, Volker
dc.date.accessioned
2019-11-11T11:55:20Z
dc.date.available
2019-10-16T10:44:34Z
dc.date.available
2019-10-16T12:02:28Z
dc.date.available
2019-11-11T08:06:50Z
dc.date.available
2019-11-11T11:55:20Z
dc.date.issued
2019-09-06
dc.identifier.other
10.3850/38WC092019-0718
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/370865
dc.identifier.doi
10.3929/ethz-b-000370865
dc.description.abstract
Impaired sediment connectivity in river systems due to transversal hydraulic structures is a primary cause of channel narrowing and down-cutting, as well as reduced morphodynamic variability. Among various restoration measures, the vortex tube is a structural measure to re-establish bed-load conveyance during flood events at low-head hydraulic structures. Bed-load particles are entrained through a slit in the tube soffit and sluiced from an upper channel to a lower parallel channel. This paper presents and compares the results of two laboratory model studies on the optimal design of vortex tubes for run-of-river hydropower plants. Although the two case study hydropower plants are situated within 1.5 km distance along the same river, differences in boundary conditions considerably reduce the suitability of one of the plants for the effective operation of a vortex tube. The test results show that the energy head difference between the two channels is a decisive hydraulic boundary condition and should be larger than approx. 1 m at all times. The dimensions of the vortex tube should be adapted to the grain sizes of the transported bed-load. If the vortex tube does not span the entire channel width, an open tube end is recommended to increase its zone of influence. A diversion efficiency of 94% was determined for the optimal design. The present findings demonstrate that vortex tubes may be an appropriate structural measure to re-establish sediment continuity at hydraulic structures, primarily where the upstream and downstream channels are located in close proximity.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
International Association for Hydro-Environment Engineering and Research (IASHR)
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
vortex tube
en_US
dc.subject
sediment connectivity
en_US
dc.subject
bed-load transport
en_US
dc.subject
bed-load diversion
en_US
dc.title
Bed-Load Diversion with a Vortex Tube System
en_US
dc.type
Conference Paper
dc.rights.license
In Copyright - Non-Commercial Use Permitted
ethz.journal.title
Proceedings of the IAHR World Congress
ethz.pages.start
5900
en_US
ethz.pages.end
5909
en_US
ethz.size
10 p. submitted version (preprint); 10 p. published version
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.event
38th International Association for Hydro-Environmental Engineering and Research World Congress (IAHR 2019)
en_US
ethz.event.location
Panama City, Panama
en_US
ethz.event.date
September 1-6, 2019
en_US
ethz.notes
Conference lecture held on September 6, 2019
en_US
ethz.grant
Fishfriendly Innovative Technologies for Hydropower
en_US
ethz.publication.place
Madrid
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::03820 - Boes, Robert / Boes, Robert
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::03820 - Boes, Robert / Boes, Robert
en_US
ethz.grant.agreementno
727830
ethz.grant.agreementno
727830
ethz.grant.fundername
SBFI
ethz.grant.fundername
SBFI
ethz.grant.funderDoi
10.13039/501100007352
ethz.grant.funderDoi
10.13039/501100007352
ethz.grant.program
H2020
ethz.grant.program
H2020
ethz.date.deposited
2019-10-16T10:51:13Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-10-16T12:02:41Z
ethz.rosetta.lastUpdated
2019-10-16T12:02:41Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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