This research aims at comparing the accuracy of flood discharge estimation. For this, we focused on the Oedo watershed of Jeju Island and compared flood discharge by analyzing the values as follows: (1) the concentration of the lumped model (HEC-HMS) and distributed model (Vflo), and (2) the in-situ data using Fixed Surface Image Velocimetry (FSIV). The flood discharge estimation from the HEC-HMS model is slightly larger than the Vflo model results. This result shows that the estimations of the HEC-HMS are larger than the flood discharge data by 4.43 to 36.24% and that of the Vflo are larger by 8.49 to 11%. In terms of the error analysis at the peak discharge occurrence time of each mapping, HEC-HMS is one hour later than the measured data, but Vflo is almost the same as the measured data.

Abstract
 1. 서 론
 2. 연구 방법
  2.1. 연구대상 하천 및 유역
  2.2. RAIDOM 기법을 활용한 강우자료 추출
  2.3. G/R 보정기법을 통한 레이더강우 보정
  2.4. 분포형 모형에 의한 홍수량 산정
 3. 결과 및 고찰
  3.1. 호우사상별 레이더 영상자료의 강우 보정
  3.2. 분포형 모형의 홍수 유출량 비교·분석
 4. 결 론
 REFERENCES

• 강보성(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
• 김용석(제주대학교 토목공학과) | Yong-Seok Kim (Department of Civil Engineering, Jeju National University)