Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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A Study on the Discharged Characteristics of the Pollutants using the Empirical Equation and Factor Analysis - Case Study of the Upper and Lower Watershed of South Han River

경험식과 요인분석을 통한 오염물질 유출 특성 연구 - 남한강 상·하류 수계 주요 하천을 중심으로

  • Park, Ji Hyoung (Han River Environment Research Center, National Institute of Environment Research) ;
  • Sohn, Su Min (Han River Environment Research Center, National Institute of Environment Research) ;
  • Rhew, Doug Hee (Han River Environment Research Center, National Institute of Environment Research)
  • 박지형 (국립환경과학원 한강물환경연구소) ;
  • 손수민 (국립환경과학원 한강물환경연구소) ;
  • 류덕희 (국립환경과학원 한강물환경연구소)
  • Received : 2011.09.30
  • Accepted : 2011.11.07
  • Published : 2011.11.30
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Abstract

This study was conducted to characterize the discharge feature of pollutant load from the upper and lower watershed influencing on the water quality of South Han River using the empirical equation and Factor Analysis. The results of regression analysis between flow rate and pollutant load were as follows. In the streams of the upper watershed of South Han river, $BOD_5$ and $COD_{Mn}$ were increased as the flow rate was increased. Also, steep increases in SS and TP were observed with positive correlation with the flow rate while change in TN was slightly shown. On the other hand, in the streams of the lower watershed of South Han river, $BOD_5$ was negatively correlated with the flow rate, being decreased with the increase in the flow rate. However, changes in $COD_{Mn}$, TN, SS, and TP showed a similar trend with those observed in the upper watershed. With Factor Analysis of the water quality and various components, it was appeared that the flow rate, SS, and TP were significantly correlated each other and they were indicated as the principal component influencing on water quality in the streams of the upper watershed. In contrast, $BOD_5$, $COD_{Mn}$ and TOC were significantly correlated each other and they were included as the principal pollution component of the streams in the lower watershed. From these results, it was conclusive that the upper watershed of South Han River was mainly affected by non point source pollutants while the lower watershed was influenced by point source pollutants from the developed areas.

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References

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