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측방 유입 수문곡선 유도를 위한 저류상수 및 집중시간의 유도

Derivation of Storage Coefficient and Concentration Time for Derivation of Lateral Inflow Hydrograph

  • 유철상 (고려대학교 공과대학 건축사회환경공학부) ;
  • 김하영 (현대산업개발 토목견적예산팀) ;
  • 박창열 (서울시정개발연구원 환경안전연구실)
  • Yoo, Chul-Sang (School of Civil, Environmental and Architectural Engineering, College of Engineering, Korea University) ;
  • Kim, Ha-Young (Civil Cost Estimation Team, Hyundai Development Company) ;
  • Park, Chang-Yeol (Dept. of Environmental and Safety Research, Seoul Development Institute)
  • 투고 : 2011.03.02
  • 심사 : 2011.12.30
  • 발행 : 2012.03.31

초록

본 연구에서는 측방유입의 수문학적 해석을 시도해 보았다. 측방유입의 순간단위도는 여러 개의 격자가 만들어 내는 순간응답의 합으로 나타내었으며, 이는 Muskingum 하도추적모형을 수문학적으로 재해석하여 지체와 저류를 고려한 순간단위도를 이용한 것이다. 유역형상에 따른 측방유입 순간단위도의 변화를 살펴보기 위해 임의로 사각형과 삼각형 유역의 가상유역을 설정하여 각각에 해당하는 순간단위도를 유도하였다. 유도된 순간단위도는 각각 선형하천모형과 선형저수지모형의 합으로 이루어지며, 유역형상에 따라 서로 다른 특징을 보이게 된다. 집중시간과 저류상수의 일반적인 정의를 이용하여 측방유입의 저류상수를 수식적으로 유도하였으며, 그 결과 측방유입의 저류상수는 유역의 폭과 길이 및 주하도의 수문학적 특성을 알면 쉽게 산정할 수 있음을 확인하였다.

The objective of this study is to analyze lateral inflow hydrologically. The IUH of lateral inflow is sum of the impulse responses of total cells in basin. This IUH bases on the Muskingum channel routing method, which hydrologically re-analysed to represent it as a linear combination of the linear channel model considering only the translation and the linear reservoir model considering only the storage effect. Rectangular and triangular basins were used as imaginary basins and IUH of each basin were derived. The derived IUH have different characteristics with respect to basin's shape. The storage coefficient of lateral inflow was also derived mathematically using general definitions of concentration time and storage coefficient. As a result, the storage coefficient of lateral inflow could be calculated easily using basin's width, length and hydrological characteristics of channel.

키워드

참고문헌

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피인용 문헌

  1. Storage Coefficient of Merged Subbasins vol.22, pp.8, 2017, https://doi.org/10.1061/(ASCE)HE.1943-5584.0001524