KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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A Conceptual Soil Water Model of Catchment Water Balance: Which Hydrologic Components are Needed to Calibrate the Model?

유역 물수지 모의를 위한 개념적인 토양수분모형: 모형 보정에 필요한 수문성분 분석

  • 최대규 (부경대학교 환경공학과) ;
  • 양정석 (국민대학교 건설시스템공학부) ;
  • 정건희 (한국건설기술연구원 수자원연구실) ;
  • 김상단 (부경대학교 환경공학과)
  • Received : 2010.08.26
  • Accepted : 2011.03.23
  • Published : 2011.06.30
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Abstract

In this study a conceptual soil water model is proposed to simulate water balance at catchment scale. The model is based on the sequential separation of daily precipitation into surface runoff, wetting, vaporization, and percolation. The proposed model is calibrated by using three observation sets: empirically estimated annual vaporization, monthly wetting estimated by NRCS-CN method, and both of them. The model performance is evaluated to understand which hydrologic components for calibrating the model are needed. It is shown that both of annual vaporization and monthly wetting are indispensable hydrologic components to simulate reasonably precipitation partitioning.

본 연구에서는 유역 물수지 모의를 위한 개념적인 토양수분모형이 제안된다. 모형은 지표면에 떨어지는 강수량이 지표면 유출, 습윤, 기화, 침루 등으로 분할되는 과정을 모의한다. 경험식으로 추정된 연별 기화량, NRCS-CN 방법으로 추정된 월별 습윤량 및 이 두 가지가 모두 주어진 경우를 구분하여 모형의 매개변수가 각각 추정되어 모형의 성능을 평가한다. 연별 기화량과 월별 습윤량 자료 모두가 모형 보정에 적용될 경우만이 보다 합리적인 강수분할이 모의될 수 있음이 분석된다.

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References

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