Journal
JOURNAL OF HYDRO-ENVIRONMENT RESEARCH
Volume 5, Issue 4, Pages 289-300Publisher
ELSEVIER
DOI: 10.1016/j.jher.2010.11.002
Keywords
Stage-discharge rating curves; Large-scale particle image velocimetry; River monitoring; Unsteady channel flow; Loop-rating curve
Funding
- National Science Foundation [0843798]
- Directorate For Geosciences
- Division Of Earth Sciences [0843798] Funding Source: National Science Foundation
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The paper presents measurements acquired with Large-Scale Particle Image Velocimetry (LSPIV) during normal flows and floods in the Iowa River (U.S.A). For normal flows, comparison is made with measurements obtained with Acoustic Doppler Current Profilers (ADCP) in order to test LSPIV's performance and to address concerns potentially affecting the accuracy of the measurements. The historic flood of the Iowa River during the summer of 2008 was captured for testing LSPIV capabilities during extreme flows. Lacking alternative measurements during the flood, the LSPIV measurements are compared to the rating curve extrapolated for high flows using a one-to-one discharge-stage relationship. The comparison reveals limitations of the single-values rating curve for providing discharge estimates during high flows. Finally, the paper summarizes lessons learned during these and previous LSPIV studies with the intent to chart the research needed to enhance this promising non-intrusive field measurement technique. (C) 2010 International Association of Hydro-environment Engineering and Research, Asia Pacific Division. All rights reserved.
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