The application of LS-PIV to a small irregular river for inbank and overbank flows

Gunawan Budi

Sun Xianfang

Sterling Mark

Shiono Koji

Tsubaki Ryota

Rameshwaran Ponnambalam

Knight Donald. W.

Chandler Jim. H.

Tang Xiaonan

Fujita Ichiro

Flow Measurement and Instrumentation

This paper examines the feasibility of applying a mobile, large scale particle image velocimetry (LS-PIV) system to a 300 m reach of a small river in order to estimate the discharge. Detailed velocity measurements at a number of locations were carried out using an acoustic Doppler current profiler (ADCP) and acoustic Doppler velocimetry (ADV) for inbank, bankfull and overbank flows. The lateral distributions of the velocity index k (i.e., the ratio of the depth-averaged velocity to the surface velocity) were found to be influenced by the secondary currents, channel vegetation and flow conditions. An attempt is made to quantify the relationship between secondary flow and the velocity index. Appropriate conclusions and advice relating to the practical use of a LS-PIV system as applied to a small river are given.

Large scale particle image velocimetry

Acoustic Doppler current profiler

Discharge estimation

Construction. Civil engineering [ 510 ]

eng

Elsevier Science Ltd

(c) 2012 Elsevier Ltd. All rights reserved.

[ISSN] 0955-5986

[DOI] 10.1016/j.flowmeasinst.2012.02.001

[NCID] AA10742092

[DOI] http://dx.doi.org/10.1016/j.flowmeasinst.2012.02.001