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Unseeded and seeded PIV measurements of river flows videotaped from a helicopter

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A new PIV method for measuring river surface flows using videotaped images taken from a helicopter has heen developed. In this method, shifting of background images while videotaping was effectively corrected using the known coordinates of fixed points on the image. In low flow conditions, river surface flows were visualized using rice crackers, while in flood flow conditions surface ripples generated by the effects of near-surface turbulence and pressure fluctuation were used as natural unseeded tracers. The performance of the presented method was verified through its applications to the actual river flow measurements.

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References

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Authors and Affiliations

  1. Research Center for Urban Safety and Security, Kobe University, 1-1 Rokkodai, 657-8501, Nada, Kobe, Japan

    Fujita I.

  2. Kinki Regional Bureau of the Ministry of Land, Infrastructure and Transport, Osaka, Japan

    Hino T.

Authors
  1. Fujita I.
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  2. Hino T.
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Correspondence to Fujita I..

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Ichiro Fujita: He received his MSc(Eng) degree in Civil Engineering in 1979 and Ph.D. degree in 1990 from Kobe University. He worked in Gifu University from 1982 to 1999. He was a visiting associate professor in the Iowa Institute of Hydraulic Research, the University of Iowa from 1995 to 1996. He has been working as an associate professor in the Research Center for Urban Safety and Security, Kobe University since 1999. His research interests are image measurement of river flow, open-channel turbulence, and numerical simulation of rapidly varying flow.

Tomohiro Hino: He received his MSc(Eng) degree in Civil Engineering in 2002 from Graduate School of Science and Technology, Kobe University. He has been working at Kinki Regional Bureau of the Ministry of Land, Infrastructure and Transport as an engineer after graduation.

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Fujita, I., Hino, T. Unseeded and seeded PIV measurements of river flows videotaped from a helicopter. J Vis 6, 245–252 (2003). https://doi.org/10.1007/BF03181465

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  • DOI: https://doi.org/10.1007/BF03181465

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