Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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The Evaluation of Watershed Management Model using Behavioral Characteristics of Flow-duration Curve

유황곡선의 거동특성을 이용한 유역관리모형의 평가

  • Kim, Joo Cheol (Water Resources Research Center, Korea Water Resources Corporation) ;
  • Lee, Sang Jin (Water Resources Research Center, Korea Water Resources Corporation) ;
  • Shin, Hyun Ho (Water Resources Research Center, Korea Water Resources Corporation) ;
  • Hwang, Man Ha (Water Resources Research Center, Korea Water Resources Corporation)
  • 김주철 (한국수자원공사 Kwater연구원 수자원연구소) ;
  • 이상진 (한국수자원공사 Kwater연구원 수자원연구소) ;
  • 신현호 (한국수자원공사 Kwater연구원 수자원연구소) ;
  • 황만하 (한국수자원공사 Kwater연구원 수자원연구소)
  • Received : 2008.09.29
  • Accepted : 2009.06.11
  • Published : 2009.07.30
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Abstract

The performance of Rainfall-Runoff Forecasting System (RRFS), the watershed management model for the Geum river basin, is evaluated based on the agreement between the simulated and observed hydrographs and the behavioral characteristics of the flow-duration curves. As a result, the simulated hydrographs are well agreed with the observed ones except high flow discharges. It is inferred that most of the errors in the simulated hydrographs are due to the misestimation of agricultural water use in $2^{nd}$ quarter and the discrepancy of the peak discharges in $3^{rd}$ quarter. It is however judged that RRFS would give the reliable runoff hydrographs from the point of view of continuous model application. And simulated flow-duration curves and flow-duration coefficients are also similar to the observed ones except flood flow region. From the above result it is confirmed that the construction of Yongdam dam improves the state of flow-duration curve at the Gongjoo station.

Keywords

Acknowledgement

Supported by : 수자원

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