期刊
FLOW MEASUREMENT AND INSTRUMENTATION
卷 24, 期 -, 页码 1-12出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.flowmeasinst.2012.02.001
关键词
Large scale particle image velocimetry; Acoustic Doppler current profiler; Discharge estimation
资金
- UK Engineering and Physical Sciences Research Council under auspices of grant [EP/E002250/01]
- Environment Agency for England and Wales
- Blackwater Valley Countryside Partnership
- EPSRC [EP/E002250/1, EP/E003915/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E002250/1, EP/E003915/1] Funding Source: researchfish
- Natural Environment Research Council [ceh010022] Funding Source: researchfish
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. (C) 2012 Elsevier Ltd. All rights reserved.
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