In this study, the Chiu-2D velocity-flow rate distribution based on theoretical background of the entropy probability method was applied to actual ADCP measurement data of Gangjung Stream in Jeju from July 2011 to June 2015 to predict the parameter that take part in velocity distribution of the stream. In addition, surface velocity measured by SIV (Surface Image Velocimeter) was applied to the predicted parameter to calculate discharge. Calculated discharge was compared with observed discharge of ADCP observed during the same time to analyze propriety and applicability of depth of water velocity average conversion factor. To check applicability of the predicted stream parameter, surface velocity and discharge were calculated using SIV and compared with velocity and flow based on ADCP. Discharge calculated by applying velocity factor of SIV to the Chiu-2D velocity-flow rate distribution and discharge based on depth of water velocity average conversion factor of 0.85 were 0.7171 m3/sec and 0.5758 m3/sec, respectively. Their error rates compared to average ADCP discharge of 0.6664 m3/sec were respectively 7.63% and 13.64%. Discharge based on the Chiu-2D velocity-flow distribution showed lower error rate compared to discharge based on depth of water velocity average conversion factor of 0.85.

Abstract
 1. 서 론
 2. Chiu-2차원 유속분포식의 매개변수 추정방법
 3. 연구방법
  3.1. 대상하천
  3.2. 관측자료
 4. 결과 및 고찰
  4.1. ADCP 실측자료에 의한 Chiu-2차원 유속분포식의 매개변수 추정
  4.2. 표면영상유속계(SIV)에 의한 표면유속분포와 평균유속 및 유량산정
 5. 결 론
 REFERENCES

• 양세창(제주특별자치도의회) | Se-Chang Yang (Jeju Special Self-Governing Provincial Council)
• 김용석(제주대학교 토목공학과) | Yong-Seok Kim (Department of Civil Engineering, Jeju National University)
• 양성기(제주대학교 토목공학과) | Sung-Kee Yang (Department of Civil Engineering, Jeju National University) Corresponding author
• 강명수(제주대학교 토목공학과) | Myung-Soo Kang (Department of Civil Engineering, Jeju National University)
• 강보성(제주대학교 토목공학과) | Bo-Seong Kang (Department of Civil Engineering, Jeju National University)