한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제53권8호
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  • Pages.569-582
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  • 2020
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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수문학적 가뭄 모니터링을 위한 실적자료 기반 물순환 모델 개발

The development of water circulation model based on quasi-realtime hydrological data for drought monitoring

  • 김진영 (세종대학교 건설환경공학과) ;
  • 김진국 (한국수자원조사기술원 낙동강조사실) ;
  • 김장경 (베이지안웍스) ;
  • 전근일 (K-water 국가가뭄정보분석센터) ;
  • 강신욱 (K-water 연구원 통합물관리연구소) ;
  • 이정주 (K-water 국가가뭄정보분석센터) ;
  • 남우성 (K-water 국가가뭄정보분석센터) ;
  • 권현한 (세종대학교 건설환경공학과)
  • Kim, Jin-Young (Department of Civil and Environmental Engineering, Sejong University) ;
  • Kim, Jin-Guk (Hydrological Survey Department, Korea Institute of Hydrological Survey) ;
  • Kim, Jang-Gyeng (Bayesian Works) ;
  • Chun, Gun-il (National Drought Information-Analysis Center, K-water) ;
  • Kang, Shin-uk (Integrated Water Resources Management Research Center, K-water Research Institute) ;
  • Lee, Jeong-Ju (National Drought Information-Analysis Center, K-water) ;
  • Nam, Woo-Sung (National Drought Information-Analysis Center, K-water) ;
  • Kwon, Hyun-Han (Department of Civil and Environmental Engineering, Sejong University)
  • 투고 : 2020.06.01
  • 심사 : 2020.06.24
  • 발행 : 2020.08.31
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초록

최근 우리나라는 도시화로 인해 수자원이용 환경이 급격한 변화를 맞이하였으며, 이로 인해 유출현상을 정량적으로 규명하여 가용수자원을 최적배분 하는데 어려움이 발생하고 있다. 이를 대비하기 위하여 국가물관리계획, 하천유역수자원관리계획 등이 제안되고 있으며, 효율적인 수자원 운영 계획 수립을 위해서는 정확하며 상세한 물수지 분석이 요구되고 있다. 그러나 기존에 수행되는 물수지 분석은 유역의 물순환 상황을 충분히 반영하지 못하며, 이러한 결과는 의사결정 측면에서 활용이 어려운 실정이다. 이러한 점에서 본 연구에서는 유역을 공간적으로 상세화하여 하천을 네트워크 형태로 재구성, 실적기반 자료를 반영한 물순환 모델을 개발하였으며, 하천을 중심으로 모니터링 지점의 유량정보가 준실시간으로 제공될 수 있는 체계를 마련하였다. 본 연구에서 개발된 물순환 모델은 기존 물수지 분석에서 나타나는 문제점을 개선하는데 목적이 있으며, 계측유역을 대상으로 모형의 적합성을 평가한 결과 특히 저유량 부분에서 기존 모형에 비해 크게 개선된 효과를 확인할 수 있었다. 본 연구에서 개발된 물순환 모델은 보다 정확한 자연유량 보정기법 적용과 유역 내 상세화된 유역네트워크를 통해 유량정보를 준실시간으로 제공함으로써 보다 현실적인 가뭄 모니터링 및 가뭄대책을 마련하기 위한 기초자료로 활용될 수 있을 것으로 기대된다.

Recently, Korea has faced a change in the pattern of water use due to urbanization, which has caused difficulties in understanding the rainfall-runoff process and optimizing the allocation of available water resources. In this perspective, spatially downscaled analysis of the water balance is required for the efficient operation of water resources in the National Water Management Plan and the River Basin Water Resource Management Plan. However, the existing water balance analysis does not fully consider water circulation and availability in the basin, thus, the obtained results provide limited information in terms of decision making. This study aims at developing a novel water circulation analysis model that is designed to support a quasi-real-time assessment of water availability along the river. The water circulation model proposed in this study improved the problems that appear in the existing water balance analysis. More importantly, the results showed a significant improvement over the existing model, especially in the low flow simulation. The proposed modeling framework is expected to provide primary information for more realistic hydrological drought monitoring and drought countermeasures by providing streamflow information in quasi-real-time through a more accurate natural flow estimation approach with highly complex network.

키워드

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