This study Analyzed four of seven runoffs which had happened in 2012 in comparison with the runoffs shown in Kalesto data, using the fixed surface image velocimetry (FSIV) installed at Oedo stream, Jeju Island. As a result of identifying a runoff curve graph, it was analyzed that the flood runoffs calculated with two observation devices were almost equivalent. As the differences in peak flows were 10 m3/s, 0.7 m3/s and 3 m3/s, the very similar result values were calculated. Even though there were errors in RMSE(Root Mean Square Error) made by two observation devices according to the degree of the peak flow, the values of R² by flood event were 0.89, 0.87, 0.86 and 0.82, showing the result values almost close to 1. Therefore, there was a very high correlation in flood runoffs calculated with two observation devices. This research method was considered to be a very suitable method to measure unexpected flood runoffs which could happen in the island area such as Jeju island during bad weather.

Abstract
 1. 서 론
 2. 연구방법
  2.1. 연구대상 하천 및 유역
  2.2. 고정식 표면영상유속계(FSIV)에 의한 유속 분석 및유출량 산정
  2.3. Kalesto를 이용한 유출량 산정
 3. 결과 및 고찰
  3.1. 유출 사상별 유출량분석
  3.2. 유출 사상별 비교
 4. 결 론
 참 고 문 헌

• 김보성(제주대학교 토목공학과) | Bo-Seong Kang (Department of Civil Engineering, Jeju National University)
• 양성기(제주대학교 토목공학과) | Sung-Kee Yang (Department of Civil Engineering, Jeju National University) Corresponding author
• 정우열(제주대학교 토목공학과) | Woo-Yeol Jung (Department of Civil Engineering, Jeju National University)
• 김용석(제주대학교 토목공학과) | Yong-Seok Kim (Department of Civil Engineering, Jeju National University)