Sediment inception under breaking tidal bores

Khezri, Nazanin and Chanson, Hubert (2012) Sediment inception under breaking tidal bores. Mechanics Research Communications, 41 49-53. doi:10.1016/j.mechrescom.2012.02.010

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Name Description MIMEType Size Downloads
Click to show the corresponding preview IMGP3931.avi Digital appendix video movie IMGP3931.avi Click to show the corresponding preview/stream video/x-msvideo 74.91MB 20
Part_track297c_postprint.pdf Postprint manuscript application/pdf 144.62KB 98

Author Khezri, Nazanin
Chanson, Hubert
Title Sediment inception under breaking tidal bores
Journal name Mechanics Research Communications   Check publisher's open access policy
ISSN 0093-6413
Publication date 2012-04
Sub-type Article (original research)
DOI 10.1016/j.mechrescom.2012.02.010
Open Access Status File (Author Post-print)
Volume 41
Start page 49
End page 53
Total pages 5
Place of publication East Park, Kidlington, Oxford, U.K.
Publisher Pergamon
Collection year 2013
Language eng
Formatted abstract
A tidal bore may develop in an estuary during the spring tide conditions when the tidal range exceeds 5–6 m and the flood tide is confined to a narrow funnelled estuary with low freshwater levels. The tidal bore is of great importance for the geomorphology of the estuarine zone. In this study, some physical modelling was performed to investigate the sediment motion inception beneath a tidal bore on a movable gravel bed. The results show the significant impact of breaking bore propagation on the gravel bed motion. The dominant contribution to sediment transport inception is the longitudinal pressure gradient force, while the transient recirculation motion next to the bed yields to a drag force acting in the upstream direction and contributing to sediment motion.
Keyword Geophysical flows
Sediment transport inception
Physical modelling
Tidal bores
Bed load
Longitudinal pressure gradient
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes The deposited manuscript is the postprint version in line with the Sherpa-Romeo policy. The digital appendix contains the video IMGP3931.avi which presents a side view of the experiment. The movie was taken with a camera Pentax™ K-7 equipped with a Voigtlander Nokton 58 mm f1.4 lens. Initially the water flows from right to left. The ADV unit is seen on the right beneath an acoustic displacement meter. The tidal bore propagates from left to right. The passage of the bore induces a sudden gravel bed motion upstream (from left to right).

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2013 Collection
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 1 times in Scopus Article | Citations
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Created: Sat, 31 Mar 2012, 02:48:26 EST by Hubert Chanson on behalf of School of Civil Engineering