한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제54권11호
  • /
  • Pages.891-901
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  • 2021
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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수문 순환 건전성 평가 기법 개발 : 경안천 유역 적용

Development of the evaluation method for hydrological cycle soundness: application to Gyeongan stream watershed

  • 김건 (국민대학교 건설시스템공학부) ;
  • 이재범 (국민대학교 건설시스템공학부) ;
  • 양정석 (국민대학교 건설시스템공학부)
  • Kim, Geon (Department of Civil Engineering, Kookmin University) ;
  • Lee, Jae-Beom (Department of Civil Engineering, Kookmin University) ;
  • Yang, Jeong-Seok (Department of Civil Engineering, Kookmin University)
  • 투고 : 2021.08.17
  • 심사 : 2021.09.03
  • 발행 : 2021.11.30
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초록

본 연구에서는 월 단위 수문순환 관측자료를 이용하여 수문순환 건전성 평가 기법을 개발하였다. 경안천 유역을 다섯 개의 소유역으로 나누고 무강우 일수, 무 강우 일수 변동폭, 일 30 mm 이상 강우 횟수, 일 30 mm 이상 강우 횟수 변동폭, 평균하천수위, 평균하천수위 변동폭, 평균지하수위, 평균지하수위 변동폭으로 8가지 수문순환 건전성 평가 기준을 정하였다. 관측값을 표준화를 하고 엔트로피 방법을 이용하여 각 소유역 별 가중치를 산정하였다. 산정된 가중치 값으로 TOPSIS를 이용하여 수문순환 건전성 평가 지수를 산정하였다. 연구결과 경안천 상류는 11 ~ 1월, 경안천 수위표는 2 ~ 4월, 곤지암천은 4 ~ 5월, 경안천 하류는 11 ~ 2월에 수문순환 건전성 불안전한 것으로 나왔다. 본 연구에서 개발 기법은 수문순환 건전성을 관리 방안을 수립하는 정책적 결정에 있어 정량적 근거가 될 수 있을 것으로 기대된다.

In this study, a hydrological cycle soundness evaluation method was developed using monthly meteorological observation data. The Gyeongan stream watershed was divided into five sub-basins and eight criteria were established for hydrological cycle evaluation: the number of non-rainfall day, the number of non-rainfall day fluctuation, over 30 mm per day, over 30 mm per day fluctuation, average river level, average river level fluctuation, average groundwater level and average groundwater level fluctuation. Observation data were normalized and weights for evaluation by each sub-basin were calculated using the entropy method. The hydrological cycle soundness evaluation indices were calculated using TOPSIS applying the calculated weight value. As a result of the study, it was found that the hydrological cycle soundness was unstable in the Gyeongan-upstream from November to January, the Gyeongan-suwipyo from February to April, Gonjiam stream from April to May, and the Gyeongan-downstream from November to February. In this study, the developed technique is expected to serve as a quantitative basis for policy decision to recover hydrological cycle soundness.

키워드

과제정보

본 연구는 2021년도 한강수계관리위원회 환경기초조사사업의 지원을 받아 수행된 연구입니다.

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