Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Flood Runoff Calculation using Disaster Monitoring CCTV System

재난감시용 하천 CCTV를 활용한 홍수유출량 산정

  • 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 & Environmental Engineering, Dankook University)
  • Received : 2013.12.05
  • Accepted : 2014.04.03
  • Published : 2014.04.30
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Abstract

The present study aims to apply a surface image velocimetry(SIV) system to video images captured with CCTV and estimate the flood discharge. The CCTV was installed at the Hancheon Bridge of the Han Cheon in Jeju Island for disaster surveillance, and seven flood events occurred in 2012 were used. During the image analyses, input parameters, interrogation areas and searching areas were determined with proper calibration procedures. To check for accuracy and applicability of SIV, the velocities and flood discharges estimated by SIV were compared with the measured ones by an electromagnetic surface velocimeter, Kalisto. The comparison results showed fairly good agreements. The RMSE(Root Mean Square Error) values between two instruments showed a range of 4.13 and 14.2, and the determination coefficients reached 0.75 through 0.85. It means that the SIV could be used as a good alternative method for other traditional velocity measuring instruments in measuring flood discharges.

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References

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  1. Assessing Unit Hydrograph Parameters and Peak Runoff Responses from Storm Rainfall Events: A Case Study in Hancheon Basin of Jeju Island vol.24, pp.4, 2015, https://doi.org/10.5322/JESI.2015.24.4.437
  2. Development of a real-time surface image velocimeter using an android smartphone vol.49, pp.6, 2016, https://doi.org/10.3741/JKWRA.2016.49.6.469