Turbulence and suspended sediment measurements in an urban environment during the Brisbane River flood of January 2011
Brown, Richard J. & Chanson, Hubert (2012) Turbulence and suspended sediment measurements in an urban environment during the Brisbane River flood of January 2011. Journal of Hydraulic Engineering, 139(2), pp. 244-253.
In urbanised areas, the 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 analysed using a triple decomposition. The velocity fluctuations included a large energy component in the slow fluctuation range, while 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 period flows is well suited to complicated flows in an inundated urban environment.
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|Item Type:||Journal Article|
|Keywords:||Flood plain, urban environment, turbulence measurements, triple decomposition, suspended sediment concentration SSC, water body resonance, Brisbane River|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2012 American Society of Civil Engineers|
|Deposited On:||09 Aug 2012 04:28|
|Last Modified:||22 Feb 2013 16:08|
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