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dc.contributor.author
Detert, Martin
dc.contributor.author
Cao, Liekai
dc.contributor.author
Albayrak, Ismail
dc.contributor.editor
Radice, Alessio
dc.date.accessioned
2020-04-03T08:55:49Z
dc.date.available
2019-05-10T11:50:14Z
dc.date.available
2019-05-10T12:49:47Z
dc.date.available
2019-10-29T10:25:03Z
dc.date.available
2019-10-30T09:14:00Z
dc.date.available
2019-10-31T06:10:22Z
dc.date.available
2019-11-05T07:18:23Z
dc.date.available
2019-11-07T13:45:18Z
dc.date.available
2019-11-12T14:52:00Z
dc.date.available
2019-11-12T14:54:12Z
dc.date.available
2019-11-12T14:59:19Z
dc.date.available
2020-04-03T08:55:49Z
dc.date.issued
2019
dc.identifier.isbn
978-90-824846-4-9
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/341626
dc.identifier.doi
10.3929/ethz-b-000341626
dc.description.abstract
Airborne Image Velocimetry (AIV) measurements of a large surface velocity field were performed on the upstream and downstream river reaches of the hydropower plant (HPP) Schiffmühle on river Limmat, Switzerland. The averaged river discharge was 71.5 m3/s and slightly fluctuated ±0.5 m3/s during the measurements. The overarching goals of the study were to evaluate efficiency of fish guidance structures with horizontal bars installed at the turbine intake of the HPP and to assess the effect of the HPP operation on the downstream fish habitat. To this end, both AIV and 3D Acoustic Doppler Current Profiler (ADCP) measurements were conducted. The AIV setup consisted of a quadrocopter DJI Phantom 4 Pro+ incl. camera costing below 2,000 Euro and seeding particles of ecofoam chips costing around 150 Euro. Surveying flights were performed on a reach length of about 500 m with 4K video resolution at 23.976 frames per second. The total video data set comprised 23,600 image frames. To minimize computational time for the subsequent image analysis, a reduced data set of 579 image pairs each with an internal time shift of 0.2085 s was chosen. Image ortho-rectification was performed by photogrammetry software PhotoScan with ground control points taken from an existing 3D terrain model. The MATLAB-based open source software PIVlab was used to determine the time averaged surface velocity field. Despite small areas with misleading and unreliable results, the main flow characteristics match with those measured quasisimultaneously by ADCP.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
International Association for Hydro-Environment Engineering and Research IAHR
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
AIRBORNE IMAGE VELOCIMETRY
en_US
dc.subject
Acoustic Doppler Current Profiler
en_US
dc.title
Airborne Image Velocimetry Measurements at the Hydropower Plant Schiffmühle on Limmat River, Switzerland
en_US
dc.type
Conference Paper
dc.rights.license
In Copyright - Non-Commercial Use Permitted
ethz.book.title
Proceedings of the 2nd International Symposium and Exhibition on Hydro-Environment Sensors and Software, HydroSenSoft 2019
en_US
ethz.pages.start
211
en_US
ethz.pages.end
217
en_US
ethz.size
7 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.event
International Symposium and Exhibition on Hydro-Environment Sensors and Software (HydroSenSoft 2019)
en_US
ethz.event.location
Madrid, Spain
en_US
ethz.event.date
February 26 - March 1, 2019
en_US
ethz.notes
Conference lecture held on February 27, 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
en_US
ethz.tag
Airborne Image Velocimetry
en_US
ethz.tag
Acoustic Doppler Current Profiler
en_US
ethz.tag
PIV
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
2019-05-10T11:50:20Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-05-10T12:49:55Z
ethz.rosetta.lastUpdated
2021-02-15T09:57:18Z
ethz.rosetta.versionExported
true
ethz.COinS
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