For Kangjeong stream and Akgeun stream in the central part of the southern Jeju Island, on-site discharge estimation was carried out for approximately 10 months (July 2011-April 2012) twice a month on a regular basis by using ADCP (acoustic doppler current profiler) and long term rate of discharge was calculated by using SWAT (soil and water assessment tool) model. The discharge was 0.28-1.30 m 3 /sec for Kangjeong stream and 0.10-1.54 m 3 /sec for Akgeun stream. It showed the maximum in the summer and the minimum in the winter. As a result of parameter sensitivity analysis of SWAT model, CN (NRCS runoff curve number for moisture condition Ⅱ), SOL_AWC (available water capacity of the soil layer), and ESCO (soil evaporation compensation factor) showed sensitive responses. By using the result, the model was corrected and the rate of discharge was calculated. As a result, the annual discharge rate was 27.12-31.86(%) at the Akgeun basin and 23.55-28.43(%) at the Kangjeong basin.

Abstract
 1. 서 론
 2. 자료 및 방법
  2.1. 연구방법
  2.2. 연구대상유역
  2.3. 하천유량 관측
  2.4. SWAT 모델의 입력자료 구축
 3. 결과 및 고찰
  3.1. SWAT 모델 매개변수 민감도 분석
  3.2. 유출량 산정 결과
 4. 결 론
 참 고 문 헌

• 강명수(제주대학교 토목공학과) | Myung-Su 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)
• 김동수(단국대학교 토목환경공학과) | Dong-Su Kim (Department of Civil & Environmental Engineering, Dankook University)