Real-time Discharge Measurement of the River Using Fixed-type Surface Image Velocimetry
고정식 표면영상유속계 (FSIV)를 이용한 실시간 하천 유량 산정

Seo-Jun Kim, Kwon-Kyu Yu, Byung-Man Yoon
2011 Journal of Korea Water Resources Association  
Surface Image Velocimetry (SIV) is a recently-developed discharge measurement instrument. It uses image processing techniques to measure the water surface velocity and estimate water discharge with given cross section. The present study aims to implement a FSIV (Fixed-type Surface Image Velocimetry) at Soojeon Bridge in the Dalcheon. The hardware system consists of two digital cameras, a computer, and a pressure-type water stage gauge. The images taken with the hardware system are sent to a
more » ... m are sent to a server computer via a wireless internet, and analyzed with a image processing software (SIV software). The estimated discharges were compared with the observed discharges through Goesan dam spillway and index velocity method using ADVM. The computed results showed a good agreement with the observed one, except for the night time. The results compared with discharges through Goesan dam spillway reached around 5∼10% in the case of discharge over 30 m 3 /s, and the results compared with discharges through index velocity method using ADVM reached around 5% in the case of discharge over 200 m 3 /s. Considering the low cost of the system and the visual inspection of the site situation with the images, the SIV would be fairly good way to measure water discharge in real time.
doi:10.3741/jkwra.2011.44.5.377 fatcat:ntwzlqen2ne5rpp7ihmfm3h4xu