Turbulence measurements in the Garonne River tidal bore: First observations

Simon, B., Lubin, P., Reungoat, D. and Chanson, H. (2011). Turbulence measurements in the Garonne River tidal bore: First observations. In: Eric Valentine, Colin Apelt, James Ball, Hubert Chanson, Ron Cox, Robert Ettema, George Kuczera, Martin Lambert, Bruce Melville and Jane Sargison, Proceedings of the 34th IAHR World Congress. 34th IAHR World Congress, 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering, Brisbane, Australia, (1141-1148). 26 June - 1 July 2011.

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Name Description MIMEType Size Downloads
Author Simon, B.
Lubin, P.
Reungoat, D.
Chanson, H.
Title of paper Turbulence measurements in the Garonne River tidal bore: First observations
Conference name 34th IAHR World Congress, 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering
Conference location Brisbane, Australia
Conference dates 26 June - 1 July 2011
Proceedings title Proceedings of the 34th IAHR World Congress
Place of Publication Brisbane, Australia
Publisher Engineers Australia
Publication Year 2011
Sub-type Fully published paper
ISBN 9780858258686
Editor Eric Valentine
Colin Apelt
James Ball
Hubert Chanson
Ron Cox
Robert Ettema
George Kuczera
Martin Lambert
Bruce Melville
Jane Sargison
Start page 1141
End page 1148
Total pages 8
Collection year 2012
Language eng
Abstract/Summary A tidal bore is an abrupt rise in water depth advancing in some estuaries during spring tide conditions. In the present study, some detailed turbulence field measurements were conducted continuously at high-frequency (64 Hz) in the Garonne River tidal bore. The turbulent velocity components were sampled with an acoustic Doppler velocimeter (ADV) at 0.8 m beneath the freesurface. On 10 and 11 Sept. 2010, the tidal bore was undular as it passed in front of the sampling site. The tidal bore Froude number estimated from the channel bathymetry and observations was equal to 1.20 and 1.30 on 10 and 11 Sept. 2010 respectively. The turbulent velocity data showed the marked impact of the tidal bore propagation. The longitudinal velocity component highlighted some rapid flow deceleration during the passage of the tidal bore, associated with a sudden rise in the free surface elevation, and a flow reversal after the tidal bore front passage. The Reynolds stress data indicated some large amplitudes and rapid fluctuations during the tidal bore and flood flow. These field observations are the first detailed turbulence measurements in a tidal bore with high spatial and temporal resolutions.
Keyword Tidal bore
Garonne River
Field measurements
Unsteady turbulence
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Conference theme - Balance and Uncertainty: Water in a Changing World

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2012 Collection
 
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Created: Sat, 02 Jul 2011, 16:40:03 EST by Hubert Chanson on behalf of School of Civil Engineering