Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Trophic State Index (TSI), Spatial Gradient Characteristics and the Empirical Models for Eutrophication Evaluations in Daecheong Reservoir

대청호 수질오염 평가를 위한 부영양도 지수산정, 공간적 구배 특성 및 경험적 모델

  • Kwon, Hyuk-Hyun (Department of Biological Sciences, College of Biosciences and Biotechnology, Chungnam National University) ;
  • An, Kwang-Guk (Department of Biological Sciences, College of Biosciences and Biotechnology, Chungnam National University)
  • 권혁현 (충남대학교 생명시스템과학대학 생명과학과) ;
  • 안광국 (충남대학교 생명시스템과학대학 생명과학과)
  • Received : 2014.04.01
  • Accepted : 2014.08.13
  • Published : 2014.09.30
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Abstract

The objectives of this study were to analyze reservoir trophic state, based on Trophic State Index (TSI), spatial variation patterns of three zones (riverine, transition, and lacustrine zone), and empirical models through 20-years long-term data analysis. Trophic variables of TP and CHL-a were highest during the summer monsoon, and decreased along the main axis from the riverine to lacustrine zone. In the mean time, TN did not show the trend. Ratios of N:P and Secchi disc transparency (SD) increased from the riverine to lacustrine zone. The analysis of trophic state index (TSI) showed that mean TSI (TP) and TSI (CHL-a) were 62 and 57, respectively, and these values were highest in the transition zone during the summer. This zone should be managed well due to highest lake water pollution. The analysis of Trophic State Index Deviation (TSID) showed that algal growth was primarily limited by light penetration, and this was most pronounced in the monsoon season. The analysis of empirical models showed that the value of $R^2$, based on CHL-SD model, was 0.30 (p < 0.0001) in the transition zone and the $R^2$, based on TP-SD model, was 0.41 (p < 0.0001) in the transition zone.

Keywords

References

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