Fluid flow and sediment entrainment in the Garonne River bore and tidal bore collision

Keevil, Claire E., Chanson, Hubert and Reungoat, David (2015) Fluid flow and sediment entrainment in the Garonne River bore and tidal bore collision. Earth Surface Processes and Landforms, 40 12: 1574-1586. doi:10.1002/esp.3735

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Author Keevil, Claire E.
Chanson, Hubert
Reungoat, David
Title Fluid flow and sediment entrainment in the Garonne River bore and tidal bore collision
Journal name Earth Surface Processes and Landforms   Check publisher's open access policy
ISSN 1096-9837
1096-9837
Publication date 2015
Sub-type Article (original research)
DOI 10.1002/esp.3735
Open Access Status Other
Volume 40
Issue 12
Start page 1574
End page 1586
Total pages 14
Place of publication Chichester, West Sussex, United Kingdom
Publisher John Wiley and Sons
Collection year 2016
Language eng
Formatted abstract
A detailed field study was carried out on a tidal bore to document the turbulent processes and sediment entrainment which occurred. The measured bore, within the Arcins Channel of the Garonne River (France), was undular in nature and was followed by well-defined secondary wave motion. Due to the local river geometry a collision between the Arcins channel tidal bore and the bore which formed within the main Garonne River channel was observed about 800 m upstream of the sampling site. This bore collision generated a transient standing wave with a black water mixing zone. Following this collision the bore from the main Garonne River channel propagated ‘backward’ to the downstream end of the Arcins channel. Velocity measurements with a fine temporal resolution were complemented by measurements of the sediment concentration and river level. The instantaneous velocity data indicated large and rapid fluctuations of all velocity components during the tidal bore. Large Reynolds shear stresses were observed during and after the tidal bore passage, including during the 'backward' bore propagation. Large suspended sediment concentration estimates were recorded and the suspended sediment flux data showed some substantial sediment motion, consistent with the murky appearance of the flood tide waters.
Keyword Bore collision
Field observations
Garonne River
Sediment processes
Tidal bore
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 2016 Collection
 
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