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http://dx.doi.org/10.5322/JESI.2013.22.5.581

Flood Runoff Measurements using Surface Image Velocimetry  

Kim, Yong-Seok (Department of Civil Engineering, Jeju National University)
Yang, Sung-Kee (Department of Civil Engineering, Jeju National University)
Yu, Kwon-Kyu (Department of Civil Engineering, Dong-eui University)
Kim, Dong-Su (Department of Civil & Env. Engineering, Dankook University)
Publication Information
Journal of Environmental Science International / v.22, no.5, 2013 , pp. 581-589 More about this Journal
Abstract
Surface Image Velocimetry(SIV) is an instrument to measure water surface velocity by using image processing techniques. Since SIV is a non-contact type measurement method, it is very effective and useful to measure water surface velocity for steep mountainous streams, such as streams in Jeju island. In the present study, a surface imaging velocimetry system was used to calculate the flow rate for flood event due to a typhoon. At the same time, two types of electromagnetic surface velocimetries (electromagnetic surface current meter and Kalesto) were used to observe flow velocities and compare the accuracies of each instrument. The comparison showed that for velocity distributions root mean square error(RMSE) was 0.33 and R-squared was 0.72. For discharge measurements, root mean square error(RMSE) reached 6.04 and R-squared did 0.92. It means that surface image velocimetry could be used as an alternative method for electromagnetic surface velocimetries in measuring flood discharge.
Keywords
SIV; Kalesto; electromagnetic surface current meter; Doppler radar; Surface velocity;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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