KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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A Study on Water-level Rise Behavior Curve using Historical Record

기왕자료를 이용한 수위상승거동곡선에 관한 연구

  • Kwak, Jaewon (Han River Flood Control Office) ;
  • Kim, Gilho (Korea Institute of Civil Engineering and Building Technology)
  • 곽재원 (환경부 한강홍수통제소) ;
  • 김길호 (한국건설기술연구원 수자원하천연구본부)
  • Received : 2023.03.16
  • Accepted : 2023.04.24
  • Published : 2023.10.01
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Abstract

The comprehension of water-level behavior in rivers is essential for effective flood and river environmental management. The objective of this study is to propose a methodology that can be used by field engineers engaged in actual practice, to readily identify the characteristics of water-level behavior during flood events. To this end, a total of 45 historical water-level records from 2010 to 2022 year, which provide flood information for the flood vulnerable districts of the Han River, were obtained. A Water-level Rise Behavior Curve (WRBC) was developed and suggested to quantify the amount of water-level rise per unit time during flood. As a result, the water-level rises by more than 80% of the total rise within the first 6.2 hours, followed by a gradual rise. The time required to achieve a particular equilibrium varied depending on the area and runoff characteristics of the upstream. Furthermore, the study revealed that the WRBC provides a statistical representation of the water-level rise trend during floods, and can be effectively utilized for flood mitigation measures in waterfront spaces and irrigation facilities.

하천의 수위변화 특성에 대한 이해는 여러 수방활동 및 하천환경의 관리를 위하여 필수적이다. 본 연구는 각종 수방활동에서 종사하는 현장 엔지니어가 특정 지점의 홍수시 수위상승 특성을 간편하게 확인하고 활용할 수 있는 방법론을 제시하는 데 목적이 있다. 이를 위하여 한강수계의 홍수취약지구에 홍수정보를 제공하고 있는 45개 관측소의 2010년부터 2022년까지의 10분 단위 수위자료를 이용하여 홍수 사상에서 발생하는 시간적인 상승량을 단위시간을 통하여 정량화하고 분위화한 수위상승거동곡선(WRBC) 개념을 제시하였으며, 그 적용성을 검토하였다. 분석결과, 홍수시의 수위상승 거동은 평균적으로 초반 6.2시간 이내에 전체 수위상승량의 80% 이상이 상승하며 그 이후에는 점진적으로 상승하는 것으로 분석되었으며, 수위상승 이후에 일정한 평형상태에 도달하는 시간은 상류유역의 면적과 유출 특성에 따라 다른 것으로 나타났다. 이러한 WRBC는 홍수유출로 인하여 발생하는 수위상승의 평균적인 경향에 대해 통계적이고 직관적인 검토에 장점이 있으며, 하천변에 위치한 친수공간, 수리시설 등의 수방활동에 활용할 수 있을 것으로 기대된다.

Keywords

Acknowledgement

본 결과물은 환경부의 재원으로 한국환경산업기술원의 물관리연구사업(1615012820)과 과학기술정보통신부 한국건설기술연구원 주요사업(20230263-001)의 지원을 받아 연구되었습니다. 아울러 소중한 시간을 할애하여 논문을 심사해주시고 귀한 의견을 주신 익명의 심사위원님들께도 감사드립니다.

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