한국지리정보학회지 (Journal of the Korean Association of Geographic Information Studies)

  • 제24권4호
  • /
  • Pages.194-208
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  • 2021
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  • 1226-9719(pISSN)
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  • 2287-6952(eISSN)
한국지리정보학회 (The Korean Association of Geographic Information Studies)
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광학위성을 활용한 임진강 접경지역 황강댐 저수지의 월단위 물수지 분석

Monthly Water Balance Analysis of Hwanggang Dam Reservoir for Imjin river in Border Area using Optical Satellite

  • 김진겸 (K-water연구원 유역물관리연구소) ;
  • 강부식 (단국대학교 토목환경공학과) ;
  • 유완식 (K-water연구원 유역물관리연구소) ;
  • 황의호 (K-water연구원 유역물관리연구소)
  • KIM, Jin-Gyeom (Water Resources Management Research Center K-water Research Institute) ;
  • KANG, Boo-Sik (Dept. of Civil and Environmental Engineering, Dankook University) ;
  • YU, Wan-Sik (Water Resources Management Research Center K-water Research Institute) ;
  • HWANG, Eui-Ho (Water Resources Management Research Center K-water Research Institute)
  • 투고 : 2021.12.10
  • 심사 : 2021.12.21
  • 발행 : 2021.12.31
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초록

임진강 상류 북한지역에 위치한 황강댐은 약 3억 5천만m3 규모의 저수지를 가지고 있으며, 하류로의 발전방류 이후 방류량 일부를 도수하여 예성강 유역의 생활, 공업, 농업용수를 공급하고 있는 것으로 알려져 있다. 이와 같은 황강댐의 유역변경식 용수공급으로 인해 임진강 하류로 흘러내려 오는 유량이 감소하여 우리나라의 용수공급, 하천유지유량, 수질 및 생태환경에 부정적인 영향을 미치고 있다. 하지만 남북접경지역의 특성상 수문자료의 공유가 원활하지 못하고 황강댐의 운영방식을 알 수가 없으므로 하류부 남한측 지역의 피해위험이 상존하고 있다. 이에 본 연구에서는 광학 원격탐사 영상을 기반으로 보정된 수문모형과 물수지 분석을 통해 장기유출 개념의 월별 도 수량을 산정하였다. 2019년 1월부터 2021년 9월까지의 물수지 분석결과 황강댐의 평균 도수량은 29.2m3/s로서 이는 연간 9.22억 톤에 해당하는 수자원 양이며, 황강댐에 유입되는 연평균 유입량인 20.2억 톤 중 45.6%를 차지한다.

The Hwanggang Dam in North Korea is located upstream of the Imjin River which is a shared river in the border area. It is known to have a reservoir capacity of 350 million cubic meters and releases a discharge primarily for generating hydroelectric power and partly for transferring to the Yesung River basin. Due to the supply of water from the Hwanggang Dam to another basin, the flow of the Imjin River has decreased, which has a negative impact on the water supply, river maintenance flow, water quality, and ecological environment in Korea. However, due to the special national security issue of the South and North Korea border region, the hydrological data is not shared, and the operation method of the Hwanggang Dam is unknown, so there is a risk of damage to the southern part of the downstream area. In this study, the monthly diversion as the long-term runoff concept was derived through the calibrated hydrological model based on optical remotely sensed Images and water balance analysis. As a result of the water balance analysis from January 2019 to September 2021, the average diversion of the Hwanggang Dam was 29.2m3/s, which is equivalent to 922 million tons per year and 45.6% of the annual inflow of 2.02 million tons into the Hwanggang Dam.

키워드

과제정보

본 연구는 환경부의 물관리연구사업(79622)에서 지원받았습니다.

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