Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Assessment of Water Quality in the Sum-river and the Dal-stream using Epilithic Diatom-based Indices

부착규조류를 이용한 달천과 섬강의 생물학적 수질평가

  • Kim, Yong-jin (Department of Biology, College of Natural Science, Kyonggi University) ;
  • Lee, Ok-min (Department of Biology, College of Natural Science, Kyonggi University)
  • Received : 2009.05.07
  • Accepted : 2009.07.01
  • Published : 2009.07.30
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Abstract

To evaluate the biological water quality, diatom-based biological indices (DAIpo and TDI) were examined in the Sum-River and the Dal-stream. Having BOD concentrations below $2mg{\cdot}L^{-1}$ in most sites, water quality of both rivers was good. The DAIpo and TDI values ranged from 29.8 to 91.4 and from 38.7 to 93.0 respectively. From the biological water quality assessment, DAIpo and TDI for both rivers displayed fair to fairly poor water quality levels. However, the two indices showed more polluted conditions than expected from the BOD vlaues. In addition, DAIpo, having wider range of differences, appears to be more sensitive to the change in water quality when compared to TDI values. Statistical analysis using principal component analysis showed that Nitzschia palea and Diatoma vulgare might not be the appropriate indicators due to their low correlations with other indicators.

Keywords

Acknowledgement

Supported by : 국립문화재연구소

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