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그린워터 및 블루워터를 이용한 물부족 평가

Water Scarcity Assessment Using Green and Blue Water Concepts

  • 김성은 (서울대학교 대학원) ;
  • 이동근 (서울대학교 조경지역시스템공학부) ;
  • 양병선 (서울대학교 협동과정 조경학) ;
  • 김예화 (연변대학교 농학원)
  • Kim, Sung Eun (Graduate School, Seoul National University) ;
  • Lee, Dong Kun (Department of Landscape Architecture and Rural System Engineering, Seoul National University) ;
  • Yang, Byung Sun (Interdisciplinary Program in Landscape Architecture, Seoul National University) ;
  • Jin, Yihua (Agricultural College of Yanbian University)
  • 투고 : 2017.11.30
  • 심사 : 2018.05.30
  • 발행 : 2018.06.30

초록

기후변화 및 인구 증가 등으로 인하여 물 공급량이 수요량을 충족하지 못하는 물부족 현상 발생이 증가하고 있다. 이와 같은 물부족 현상으로 인한 피해를 최소화하고 이에 대한 대비를 위해 수자원 및 물부족 평가 연구가 꾸준히 이루어져 왔다. 하지만 기존 연구는 대부분 지상수와 지하수만을 공급량으로 보았으며 실제 식물의 생장 및 유지에 이용되는 토양수 등에 대한 고려는 이루어지지 않았다. 이에 본 연구에서는 지상수 및 지하수를 의미하는 블루워터와 식물생장 및 유지에 이용되는 그린워터 개념을 도입한 물부족 평가 방법을 제안하고 이를 이용하여 보령 지역을 대상으로 물부족 평가를 실시하였다. SWAT(Soil and Water Assessment Tool) 모형을 이용하여 대상유역의 월별 유출량, 지하수량, 토양수량, 증발산량을 도출하였으며 이를 이용하여 월별 그린워터와 블루워터 부족량을 각각 도출하였다. 그린워터와 블루워터의 물부족 평가 결과 이 둘의 양상이 매우 다르게 나타났으며 이에 수자원 관리에서 용수 공급에 특히 주의해야 하는 시기를 알 수 있었다. 본 연구에서 제안하는 물부족 평가 방법은 식물 및 작물 생장, 유지에 사용되는 그린워터를 평가에 고려함으로써 기존 평가 방법들에 비해 더욱 상세한 결과를 얻을 수 있으며 이에 수자원 관리에 도움이 될 것으로 판단된다.

과제정보

연구 과제 주관 기관 : 환경부

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