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남강댐 상류 3개 소유역의 유출량 추정을 위한 HSPF 모형의 적용성 평가

Evaluation of HSPF Model Applicability for Runoff Estimation of 3 Sub-watershed in Namgang Dam Watershed

  • 김소래 (경상대학교 대학원 농공학과) ;
  • 김상민 (경상대학교 지역환경기반공학과(농업생명과학연구원))
  • Kim, So Rae (Graduate School, Gyeongsang National University) ;
  • Kim, Sang Min (Dept. of Agricultural Engineering (Institute of Agriculture and Life Science), Gyeongsang National University)
  • 투고 : 2018.02.14
  • 심사 : 2018.05.28
  • 발행 : 2018.05.30

초록

The objective of this study was to evaluate the applicability of a HSPF (Hydrological Simulation Program-Fortran) model for runoff estimation in the Namgang dam watershed. Spatial data, such as watershed, stream, land use, and a digital elevation map, were used as input for the HSPF model, which was calibrated and validated using observed runoff data from 2004 to 2015 for three stations (Sancheong, Shinan, Changchon) in the study watershed. Parameters for runoff calibration were selected based on the user's manual and references, and parameter calibration was done by trial and error. The $R^2$ (determination coefficient), RMSE (root-mean-square error), NSE (Nash-Sutcliffe efficiency coefficient), and RMAE (relative mean absolute error) were used to evaluate the model's performance. Calibration and validation results showed that annual mean runoff was within a ${\pm}5%$ error in Sancheong and Shinan, whereas there was a14% error in Changchon. The model performance criteria for calibration and validation showed that $R^2$ ranged from 0.80 to 0.92, RMSE was 2.33 to 2.39 mm/day, NSE was 0.71 to 0.85, and RMAE was 0.37 to 0.57 mm/day for daily runoff. Visual inspection showed that the simulated daily flow, monthly flow, and flow exceedance graph agreed well with observations for the Sancheong and Shinan stations, whereas the simulated flow was higher than observed at the Changchon station.

키워드

참고문헌

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