Turbulence and suspended sediment measurements in an urban environment during the Brisbane River flood of January 2011

Brown, Richard and Chanson, Hubert (2013) Turbulence and suspended sediment measurements in an urban environment during the Brisbane River flood of January 2011. Journal of Hydraulic Engineering - ASCE, 139 2: 244-253.

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Author Brown, Richard
Chanson, Hubert
Total Author Count Override 2
Title Turbulence and suspended sediment measurements in an urban environment during the Brisbane River flood of January 2011
Journal name Journal of Hydraulic Engineering - ASCE   Check publisher's open access policy
ISSN 0733-9429
1943-7900
Publication date 2013-02
Year available 2012
Sub-type Article (original research)
DOI 10.1061/(ASCE)HY.1943-7900.0000666
Volume 139
Issue 2
Start page 244
End page 253
Total pages 10
Place of publication Reston, VA, United States
Publisher American Society of Civil Engineers
Collection year 2013
Language eng
Abstract In urbanized areas, flood flows constitute a hazard to populations and infrastructure, as illustrated during major floods in 2011. During the 2011 Brisbane River flood, some turbulent velocity data were collected using acoustic Doppler velocimetry in an inundated street. The field deployment showed some unusual features of flood flow in the urban environment. That is, the water elevations and velocities fluctuated with distinctive periods between 50 and 100 s linked with some local topographic effects. The instantaneous velocity data were analyzed using a triple decomposition. The velocity fluctuations included a large energy component in the slow fluctuation range, whereas the turbulent motion components were much smaller. The suspended sediment data showed some significant longitudinal flux. Altogether, the results highlighted that the triple decomposition approach originally developed for periodic flows is well-suited to complicated flows in an inundated urban environment.
Keyword Flood plain
Urban environment
Turbulence measurements
Triple decomposition
Suspended sediment concentration SSC
Water body resonance
Brisbane River
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes The deposit is the postprint inline with the Sherpa/Romeo policy: "author can archive post-print (ie final draft post-refereeing)". ; Published online on August 7, 2012

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2013 Collection
 
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Created: Wed, 06 Feb 2013, 06:27:26 EST by Hubert Chanson on behalf of School of Civil Engineering