KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Application of the Width Function Instantaneous Unit Hydrograph: A Case Study of Cheongmi River

폭함수 단위도법을 이용한 청미천 수문곡선 산정

  • 서용원 (서울대학교 공과대학 건설환경공학부) ;
  • 박준형 (서울대학교 공과대학 건설환경공학부) ;
  • 이동섭 (한국건설기술연구원) ;
  • 김영오 (서울대학교 공과대학 건설환경공학부)
  • Received : 2013.02.14
  • Accepted : 2013.04.30
  • Published : 2013.07.30
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Abstract

This paper examines the applicability of the Width Function Instantaneous Unit Hydrograph (WFIUH) with a case study of Cheongmi River in South Korea. The parameter values of WFIUH can be physically determined compared to the lumped hydrologic models, which are typically accompanied by parameter estimation procedures with gage records. Assuming uniformly distributed rainfall, the hydrographs obtained with the WFIUH show good agreement with observed data and also the results from HEC-1. A simple investigation of the effect from the rainstorm movement with the WFIUH demonstrates the ability of the proposed model and the need to consider the rainstorm movement effect on the resulting hydrographs for prediction purposes.

본 연구에서는 폭함수(width function)에 기초한 단위도법(WFIUH)을 이용하는 수문곡선 산정방법에 대하여 소개하고 실제 유역(청미천)에 적용하여 그 적용성을 검토하였다. 기존 집중형 모형과 비교하여 WFIUH는 매개변수를 물리적으로 결정할 수 있는 특징이 있으며 준분포형 모형으로 유역특성 및 강우의 시공간적 변동성을 수문곡선 산정에 반영할 수 있는 장점이 있다. 공간적으로 균등한 강우를 가정하여 청미천 유역에 적용한 결과 관측치와 잘 일치하는 것을 알 수 있었으며 범용 모형인 HEC-1와 비교하여 유사한 결과를 보이는 것으로 나타났다. 또한 이동강우에 대한 간단한 검토사례를 통해 WFIUH를 이용하여 강우이동이 수문곡선의 모양과 첨두유량에 미치는 영향을 평가할 수 있는 것을 보였다.

Keywords

References

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