Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Runoff Characteristics of Refractory Organic Matters from Han River Basin during Dry Days

비강우시 한강수계 하천의 연간 난분해성 물질 유출특성

  • Heo, Sanghoi (Department of Civil Engineering, Seoul National University of Science and Technology) ;
  • Im, Jiyeol (Department of Civil Engineering, Seoul National University of Science and Technology) ;
  • Gil, Kyungik (Department of Civil Engineering, Seoul National University of Science and Technology)
  • 허상회 (서울과학기술대학교 건설시스템공학과) ;
  • 임지열 (서울과학기술대학교 건설시스템공학과) ;
  • 길경익 (서울과학기술대학교 건설시스템공학과)
  • Received : 2017.08.01
  • Accepted : 2017.08.21
  • Published : 2017.08.31
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Abstract

As a drinking water source of 26 millions people of Seoul metropolitan region, Han river is one of the most important basin. Managing the Non-point source pollution which is regarded as the main cause of water pollution including refractory organic matter is important thing. This research investigates the runoff characteristics of organic matters from main 3 rivers (South Han, North Han, Kyungan). Water quality measurement items include not only carbon-based TOC (Total Organic Carbon), DOC (Dissolved Organic Carbon), POC (Particulate Organic Carbon) but also R-TOC (Refractory Total Organic Carbon), R-DOC (Refractory Dissolved Organic Carbon), R-POC (Refractory Particulate Organic Carbon) is researched. The research shows that R-TOC takes approximately 61~83% of TOC. Most of the R-TOC is consist of R-DOC (72~77%). Refractory organic matter have a stable runoff characteristics compared to other organic matter. The organic matter concentrations of South Han river and Kyungan river are the highest in spring time and show a gradual decline. The concentrations of Kyunan river is the highest. Kyungan river's small area and the high city land use ratio seem to be the reason. Loading of organic matter in summer time takes the most loading (62~84%). TOC loadings per unit area of each river is Kyungan river ($1.22ton/km^2$), South Han river ($1.01ton/km^2$), North Han river ($0.91ton/km^2$).

2,600만 수도권 시민들의 식수원인 한강수계의 경우 수질관리를 위해 비점오염원에 대한 관리가 중요하며 특히 비점오염원이 주요 원인인 유기물질 및 난분해성 물질에 대한 조사가 필요하다. 이번 연구에서는 한강 수계의 주요 3개 하천(남한강, 북한강, 경안천)의 연간 비강우시 난분해성 유기물질을 포함한 유기물질의 유출특성을 연구하였다. 연구결과 유기물질 및 난분해성 물질의 경우 용존성 물질의 비율이 높았으며 전체 부하량중 여름철에 대부분의 부하량이 가장 많았다. 각 하천별 유기물질 및 난분해성 물질의 연간 부하량의 경우 유역면적에 비례하여 남한강, 북한강, 경안천 순서로 나타났다. 각 유역 면적 당 부하량 산정결과 TOC의 경우 경안천, 남한강, 북한강 순서로 나타났으며, R-TOC의 경우 비교적 일정한 유출특성을 보였다.

Keywords

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