Aeration performances of a gabion stepped weir with and without capping

Wuthrich, Davide and Chanson, Hubert (2015) Aeration performances of a gabion stepped weir with and without capping. Environmental Fluid Mechanics, 15 4: 711-730. doi:10.1007/s10652-014-9377-9

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Click to show the corresponding preview IMGP4537.avi Movie - Gabion stepped spillway Click to show the corresponding preview/stream video/x-msvideo 47.65MB 0
Click to show the corresponding preview IMGP4566.avi Movie - Gabion stepped spillway Click to show the corresponding preview/stream video/x-msvideo 37.06MB 0
Click to show the corresponding preview IMGP4633.avi Movie - Gabion stepped spillway Click to show the corresponding preview/stream video/x-msvideo 64.05MB 0
Click to show the corresponding preview IMGP5001.avi Movie - Capped gabion stepped spillway Click to show the corresponding preview/stream video/x-msvideo 44.73MB 0
Click to show the corresponding preview IMGP5407.avi Movie - Capped gabion stepped spillway Click to show the corresponding preview/stream video/x-msvideo 53.88MB 0
PAP_322c_postprint.pdf Full text (open access) application/pdf 847.81KB 0
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Author Wuthrich, Davide
Chanson, Hubert
Title Aeration performances of a gabion stepped weir with and without capping
Journal name Environmental Fluid Mechanics   Check publisher's open access policy
ISSN 1567-7419
1573-1510
Publication date 2015-08-01
Year available 2014
Sub-type Article (original research)
DOI 10.1007/s10652-014-9377-9
Open Access Status File (Author Post-print)
Volume 15
Issue 4
Start page 711
End page 730
Total pages 20
Place of publication Dordrecht, The Netherlands
Publisher Springer
Language eng
Abstract The stepped spillway design has been used for more than 3,300 years. A simple structure is the gabion stepped weir. A laboratory study was performed herein in a large size facility. Three gabion stepped weirs were tested with and without capping, as well as a flat impervious stepped configuration. For each configuration, detailed air-water flow measurements were conducted systematically for a range of discharges. The observations highlighted the seepage flow through the gabions and the interactions between seepage and overflow. The air-water flow properties showed that the air concentration, bubble count rate and specific interface data presented lower quantitative values in the gabion stepped weir, compared to those on the impervious stepped chute, while higher velocities were measured at the downstream end of the gabion stepped chute. The re-oxygenation rate was deduced from the integration of the mass transfer equation using air-water interfacial area and velocity measurements. The aeration performances of the gabion stepped weir were lesser than on the flat impervious stepped chute, but for the lowest discharge. For the two configurations with step capping, the resulting flow properties were close to those on the impervious stepped configuration.
Keyword Aeration
Air-water interfacial flow properties
Gabion stepped weirs
Impervious step capping
Physical modelling
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
 
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