대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

  • 제33권4호
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  • Pages.1361-1375
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  • 2013
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  • 1015-6348(pISSN)
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  • 2799-9629(eISSN)
대한토목학회 (Korean Society of Civil Engeneers)
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목감천 복원설계를 위한 비정상성을 고려한 설계홍수량의 산정

Estimation of Design Discharge Considering Nonstationarity for River Restoration in the Mokgamcheon

  • 이길성 (서울대학교 공과대학 건설환경공학부) ;
  • 오진호 (현대산업개발 주식회사 Power Energy Infra Team) ;
  • 박기두 (서울대학교 공학연구소, 첨단기술 기반 하천 운영 및 관리 선진화 연구단) ;
  • 성장현 (국토교통부 영산강홍수통제소 예보통제과)
  • 투고 : 2012.05.10
  • 심사 : 2013.05.06
  • 발행 : 2013.07.30
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초록

Lee et al. (2011)이 제시한 목감천 유역의 하천복원 설계절차에 근거하여 수리구조물의 설계와 관련 있는 설계홍수량을 산정에 있어 비정상성을 고려하여 산정하였다. 본 연구의 목적은 목감천 유역에서 비정상성을 고려한 새로운 설계홍수량을 제안하기 위함이다. 설계홍수량 산정방법인 설계-호우단위도법과 직접 홍수빈도해석법을 적용하였으며, 각각의 방법에 사용되는 빈도분석은 NCAR (National Center for Atmospheric Research)에서 개발된 extRemes 모형을 통하여 비정상성을 고려하였다. 직접 홍수빈도해석의 방법은 유량으로부터 직접 빈도해석을 수행한다는 점에서 신뢰성이 기대되지만, 설계-호우단위도법보다 다소 과소 추정되었다. 따라서 가장 크게 산정된 설계호우-단위도법의 100년 빈도 설계홍수량을 목감천 유역의 설계홍수량으로 결정하였다.

The design flow considering nonstationarity is estimated to determine the design flood related to hydraulic structure quantitatively based on the design process for stream restoration in the Mokgamcheon watershed proposed by Lee et al. (2011). The purpose of this research is to suggest new ways that the design flood was calculated considering nonstationarity at the Mokgamcheon watershed. Storm-unit hydrograph method to calculate design flood and direct frequency analysis were applied and nonstationarity was considered for the frequency analysis through extRemes toolkit developed at NCAR (National Center for Atmospheric Research). Although the method of direct flood frequency analysis due to dealing with flowrates directly has a more reliable than strom-unit hydrograph method, as a result, the method of direct flood frequency analysis underestimated the design flood than strom-unit hydrograph method due to the characteristics of the flow data. Therefore, the flood of storm-unit hydrograph method (100 years frequency) was determined as the design flood in the Mokgamcheon watershed.

키워드

참고문헌

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피인용 문헌

  1. Estimation of Future Design Flood Under Non-Stationarity for Wonpyeongcheon Watershed vol.57, pp.5, 2015, https://doi.org/10.5389/KSAE.2015.57.5.139
  2. Simulation Conditions based Characteristics of Spatial Flood Data Extension vol.47, pp.6, 2014, https://doi.org/10.3741/JKWRA.2014.47.6.501
  3. Dam Effects on Spatial Extension of Flood Discharge Data and Flood Reduction Scale I vol.48, pp.3, 2015, https://doi.org/10.3741/JKWRA.2015.48.3.209