Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Comparison of TOC and DOC Distribution and the Oxidation Efficiency of BOD and COD in Several Reservoirs and Rivers in the Han River System

한강수계 주요하천과 호수내 TOC와 DOC분포 및 BOD와 COD의 산화율 비교

  • Kim, Jai-Ku (Department of Environmental Science, Kangwon National University) ;
  • Shin, Myoungsun (Department of Environmental Science, Kangwon National University) ;
  • Jang, Changwon (Department of Environmental Science, Kangwon National University) ;
  • Jung, Sungmin (Department of Environmental Science, Kangwon National University) ;
  • Kim, Bomchul (Department of Environmental Science, Kangwon National University)
  • Received : 2006.10.11
  • Accepted : 2006.12.14
  • Published : 2007.01.30
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Abstract

The seasonal variation of organic matter and the oxidation efficiency of BOD and COD were investigated in several reservoirs and rivers located in the Han River system from March 2005 to April 2006. The concentrations of TOC in the Dong River, the Myeongjicheon stream and the Han-River varied with season. Mean concentration of TOC in the lotic environment ranged from 1.9 to 6.8 mgC/L. Oxidation efficiencies calculated from carbon were approximately 12.6 to 27.1% for BOD and 27.2 to 75.0% for COD, respectively. DOC to TOC ratio in the rivers ranged from 64.3 to 79.0%. Epilimnetic TOC concentrations in two clear and deep lakes (Lake Soyang and Paro) ranged from 2.0 to 2.8 mgC/L. TOC concentrations in the lower three dams (Lake Chunchon, Uiam, and Chungpyung) were relatively high that ranged from 3.4 to 3.7 mgC/L.Oxidation efficiencies in five lakes ranged from 10.6 to 17.2% for BOD and 32.6 to 49.5% for COD, respectively. The range of DOC to TOC in Lake Soyang and Paro was approximately 69. 0 to 73.4%. The ratios of lower three dams ranged from 48.2 to 62.3%. The differences among the lakes seemed to be asociated with limnological and hydrological characteristics of the lakes.

Keywords

Acknowledgement

Supported by : 환경부

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