남강댐유역 내 주요 하천관측지점의 홍수유출량 추정을 위한 단위도 모형 비교연구 = A Comparative Study of Unit Hydrograph Models for Flood Runoff Estimation for the Streamflow Stations in Namgang-Dam Watershed

다국어 초록 (Multilingual Abstract)

In this study, three different unit hydrograph methods (NRCS, Snyder and Clark) in the HEC-HMS were compared to find better fit with the observed data in the Namgang-Dam watershed. The Sancheong, Shinan, and Changchon in Namgang-Dam watershed were selected as the study watersheds. The input data for HEC-HMS were calculated land use, digital elevation map, stream, and watershed map provided by WAter Management Information System (WAMIS). Sixty six storms from 2004 to 2011 were selected for model calibration and validation. Three unit hydrograph methods were compared with the observed data in terms of simulated runoff volume, and peak runoff for the selected storms. The results showed that the coefficient of determination ($R^2$) for the peak runoff was 0.8295~0.9999 and root mean square error (RMSE) was 0.029~0.086 mm/day for calibration stages. In the model validation, $R^2$ for the peak runoff was 0.9061~0.9916 and RMSE was 0.030~0.088 mm/day which were more accurate than calibrated data. Analysis of variance showed that there was no significant difference among the three unit hydrograph methods.

참고문헌 (Reference)

1 이지호, "선행함수조건을 고려한 유역대표 집중시간 및 저류상수의 결정" 한국방재학회 11 (11): 255-264, 2011

2 김성재, "산림지역의 유출특성을 고려한 남강댐유역내 주요 하천관측지점에 대한 홍수유출량 추정" 한국농공학회 52 (52): 85-94, 2010

3 성충현, "농업소유역의 홍수유출량 추정을 위한 단위도 모형 비교연구" 한국농공학회 50 (50): 19-36, 2008

4 KWRA, "Stream design standard" Korea Water Resources Association 2005

5 Sonu, J. H., "Revision of Snyder's Coefficient for Synthesizing Unit Hydrograph" 19 (19): 57-63, 1986

6 MLTM, "Planning Research of Flood Defence Technology for Next Generatio" Ministry of Land, Transport and Maritime Affairs 2008

7 USACE, "Modeling System HEC-HMS, Technical Reference Manual"

8 Heo, K. S., "Hydrologic soil group classification for Korea soil and its application" (4) : 48-60, 1988

9 이상호, "HEC-HMS와 HEC-RAS를 이용한 지리산 국립공원 달궁 유역 침수 모의" 농업생명과학연구원 42 (42): 21-29, 2008

10 김상민, "HEC-HMS 모형과 HEC-GeoHMS 모듈을 이용한 농업소유역의 홍수유출 해석" 한국농공학회 45 (45): 119-127, 2003

11 USACE, "HEC-HMS (version 3.4): Hydrologic Modeling System, User's Manual"

12 Im, S. J., "Estimating Runoff Curve Numbers for Paddy Fields" 30 (30): 379-387, 1997

13 Kim, C. G., "Estimating Peak Flow Considering the Runoff Characteristics in Paddies from Small Agricultural Watersheds" Seoul University 1999

14 Kim, H. J., "Development of two-parametric hyperbolic model for daily streamflow simulation" Seoul University 2001

15 Jeong, J. Y., "Continuous Streamflow Simulation Using Baseflow Separation and Nash's Instantaneous Unit Hydrograph" Dankook University 2007

16 Seong, C. H., "A Comparative Study of Unit Hydrograph Models using HEC-HMS at a small watershed" Seoul University 2004