High-frequency turbulence and suspended sediment concentration measurements in the Garonne River tidal bore

Chanson, Hubert, Reungoat, David, Simon, Bruno and Lubin, Pierre (2011) High-frequency turbulence and suspended sediment concentration measurements in the Garonne River tidal bore. Estuarine, Coastal and Shelf Science, 95 2-3: 298-306. doi:10.1016/j.ecss.2011.09.012

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Author Chanson, Hubert
Reungoat, David
Simon, Bruno
Lubin, Pierre
Title High-frequency turbulence and suspended sediment concentration measurements in the Garonne River tidal bore
Journal name Estuarine, Coastal and Shelf Science   Check publisher's open access policy
ISSN 0272-7714
1096-0015
Publication date 2011-12-10
Sub-type Article (original research)
DOI 10.1016/j.ecss.2011.09.012
Volume 95
Issue 2-3
Start page 298
End page 306
Total pages 9
Place of publication London, United Kingdom
Publisher Academic Press
Collection year 2012
Language eng
Abstract The study details new sediment concentration measurements associated with some turbulence characterisation conducted at high-frequency in the undular tidal bore of the Garonne River (France). Acoustic Doppler velocimetry was used, and the suspended sediment concentration was deduced from the acoustic backscatter intensity. The field data set demonstrated some unique flow features of the tidal bore including some large and rapid turbulent velocity fluctuations during and after the bore passage. Some unusually high suspended sediment concentration was observed about 100 s after the tidal bore front lasting for more than 10 min. It is thought that the tidal bore passage scoured the bed and convected upwards the bed material, reaching the free-surface after the bore passage. Behind the tidal bore, the net sediment flux magnitude was 30 times larger than the ebb tide net flux and directed upstream. A striking feature of the data set was the intense mixing and suspended sediment motion during the tidal bore and following flood tide. This feature has been rarely documented.
Keyword Field works
Garonne River
Sediment processes
Suspended sediment concentration
Suspended sediment flux
Tidal bore
Turbulence
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes The full bibliographic details are: CHANSON, H., REUNGOAT, D., SIMON, B., and LUBIN, P. (2011). "High-Frequency Turbulence and Suspended Sediment Concentration Measurements in the Garonne River Tidal Bore." Estuarine Coastal and Shelf Science, Vol. 95, No. 2-3, pp. 298-306 (DOI 10.1016/j.ecss.2011.09.012) (ISSN 0272-7714). The PDF file is a postprint in-line with the SHERPA/ROMEO policy: "author can archive post-print (ie final draft post-refereeing)".

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2012 Collection
 
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Created: Fri, 18 Nov 2011, 19:51:57 EST by Hubert Chanson on behalf of School of Civil Engineering