Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Comparative Analysis of Day and Night Time Video Accuracy to Calculate the Flood Runoff Using Surface Image Velocimeter (SIV)

표면영상유속계(SIV)를 활용한 홍수유출량 산정 시 주·야간영상의 정확도 비교분석

  • Kim, Yong-Seok (Department of Civil Engineering, Jeju National University) ;
  • Yang, Sung-Kee (Department of Civil Engineering, Jeju National University) ;
  • Yu, Kwonkyu (Department of Civil Engineering, Dong-eui University) ;
  • Kim, Dong-Su (Department of Civil & Env. Engineering, Dankook University)
  • Received : 2014.11.12
  • Accepted : 2015.03.03
  • Published : 2015.04.30
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Abstract

This study analyzed the velocimetry of runoff and measured the flood discharge by applying the SIV (Surface Image Velocimetrer) to the daytime and nighttime flow image data with special reference to Seong-eup Bridge at Cheonmi stream of Jeju during the flow by the severe rainstorm on May 27, 2013. A 1000W lighting apparatus with more than 150 lux was installed in order to collect proper nighttime flow image applied to the SIV. Its value was compared and analyzed with the velocity value of the fixed electromagnetic wave surface velocimetry (Kalesto) at the same point to check the accuracy and applicability of the measured velocity of flow. As a result, determination coefficient $R^2$ values were 0.891 and 0.848 respectively in line with the velocity distribution of the daytime and nighttime image and the flow volume measured with Kalesto was approximately 18.2% larger than the value measured with the SIV.

Keywords

References

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  1. Evaluation of Far Infrared Camera for Surface Image Velocimeter Versatile in Day and Night Measurement vol.48, pp.8, 2015, https://doi.org/10.3741/JKWRA.2015.48.8.659