Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Index of Organic Matter in Stream and Lake

하천·호소의 유기물 지표 평가

  • Yu, Soon Ju (Kum River Water Quality Research Laboratory, National Institute of Environmental Research) ;
  • Hwang, Jong Yeon (Kum River Water Quality Research Laboratory, National Institute of Environmental Research) ;
  • Yoon, Young Sam (Kum River Water Quality Research Laboratory, National Institute of Environmental Research) ;
  • Cheon, Se Uk (Kum River Water Quality Research Laboratory, National Institute of Environmental Research) ;
  • Han, Eui Jung (Kum River Water Quality Research Laboratory, National Institute of Environmental Research)
  • 유순주 (국립환경연구원 금강수질검사소) ;
  • 황종연 (국립환경연구원 금강수질검사소) ;
  • 윤영삼 (국립환경연구원 금강수질검사소) ;
  • 천세억 (국립환경연구원 금강수질검사소) ;
  • 한의정 (국립환경연구원 금강수질검사소)
  • Published : 1999.03.30
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Abstract

This study discussed the appropriateness of organic matter indexes such as biochemical oxygen demand(BOD) and chemical oxygen demand with potassium permanganate($COD_{Mn}$) in water quality environmental standard of streams and lakes and the applicability of the items to water quality environmental standard to add or substitute COD with potassium dichromate ($COD_{Cr}$) and total organic carbon(TOC) being used as index of organic matter. And indexes of organic matter content and organic carbon concentration were distinguished between dissolved and particulate component in water sample to estimate their effect on pollutants loading in lake and stream. The ratio of $COD_{Cr}$/BOD was 5.1 under BOD concentration 3mg/L in river water quality environmental standard II, and 2.67 above it. This ratio was diminished to 2.04 when BOD concentration was more than 8mg/L, in river quality environmental standard IV. Also the ratio of $COD_{Mn}$/BOD showed 2.16 under 3mg/L(BOD), and 1.1 above it. This ratio is also diminished to 0.84 over 8mg/L(BOD). Accordingly, we should apply this ratio depending on the concentration level to add and change organic matter index of water quality environmental standard newly. The ratio $COD_{Cr}/COD_{Mn}$ both in lake and stream shows 2.37(r=0.986, p<0.001). But the ratios showed range of 2.34~2.50, which is no much difference of this ratio according to $COD_{Mn}$ concentration.

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