Author(s): Y. Kim; M. Muste; W. Krajewski; A. Kruger; A. Bradley; L. Weber

Linked Author(s): Marian Muste, Yeri Kim, Larry J. Weber

Keywords: Mobile Large-Scale Particle Image Velocimetry; Discharge Measurements; FreeSurface Velocity Fields

Abstract: Mobile Large-Scale Particle Image Velocimetry (MLSPIV) has been developed to measure free surface velocity fields and discharge in streams without contacting flows by IIHR – Hydroscience & Engineering. MLSPIV is the latest IIHR development of Large-Scale Particle Image Velocimetry (LSPIV). LSPIV is an extension of Particle Image Velocimetry (PIV) with emphasis on illumination, seeding, and image transformation applications for large areas up to 1 km2. MLSPIV can measure whole velocity fields, while conventional instruments measure at only one point or along a line. Its non-intrusive nature enables technicians to measure river discharges continuously as flood waves propagate. MLSPIV can serve as a real-time measuring tool for any gauged and ungauged site thanks to its easy deployment and stand-alone operation. Several laboratory and field experiments have demonstrated this technique is to be a reliable, economic, and safe tool for velocity and discharge measurement in the field. For this paper, MLSPIV was tested in the Iowa River and the results to compared discharges measured with real-time LSPIV (RTLSPIV), StreamPro ADCP, and the USGS rating relationship. MLSPIV compared well with all other techniques capabilities in capturing stream flow characteristics.

DOI:

Year: 2007