Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Evaluation of Water Quality Characteristics and Water Quality Improvement Grade Classification of Geumho River Tributaries

금호강 수계 지류하천의 수질 특성 평가 및 수질개선 등급화 방안

  • Jung, Kang-Young (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Ahn, Jung-Min (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Kim, KyoSik (Department of Civil Engineering Kyungpook National University) ;
  • Lee, In Jung (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Yang, Duk Seok (Nakdong River Environment Research Center, National Institute of Environmental Research)
  • 정강영 (국립환경과학원 낙동강물환경연구소) ;
  • 안정민 (국립환경과학원 낙동강물환경연구소) ;
  • 김교식 (경북대학교 토목공학과) ;
  • 이인정 (국립환경과학원 낙동강물환경연구소) ;
  • 양득석 (국립환경과학원 낙동강물환경연구소)
  • Received : 2016.02.12
  • Accepted : 2016.04.21
  • Published : 2016.06.30
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Abstract

In this study, we analyzed on-site monitoring data for 15 tributaries in Geumho watersheds for 3 years (2011-2013) in order to sort out priorities on water quality characteristics and improvement. As a result of estimating contribution to contamination of the tributary rivers, Dalseocheon showed the highest load densities, despite the smallest watershed area, with 22.7% $BOD_5$, 30.7% $COD_{Mn}$, 31.3% TOC and 47.6% TP. After conducting PCA (principal component analysis) and FA (factor analysis) to analyze water quality characteristics of the tributary rivers, the first factor was classified as $COD_{Mn}$, TOC, EC, TP and $BOD_5$, the second factor as pH, Chl-a and DO, the third factor as water temperature and TN, and the fourth factor as SS and surface flow. In addition, arithmetical sum of each factor's scores based on grading criteria revealed that Dalseocheon and Namcheon were classified into Group A for their highest scores - 96 and 93, respectively -, and selected as rivers that require water environmental management measures the most. Also, water environmental contamination inspection showed that Palgeocheon had the most number of aquatic factors to be controlled: $BOD_5$, $COD_{Mn}$, SS, TOC, T-P, Chl-a, etc.

Keywords

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