Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
권호 표지

Interannual and Seasonal Fluctuations of Nutrients, Suspended Solids, Chlorophyll, and Trophic Sate along with Other General Water Quality Parameters Near Two Intake Towers of Daechung Dam

  • Lee, Sun-Goo (Department of Biology, College of Biological Sciences and Biotechnology, Chungnam National University) ;
  • Han, Jeong-Ho (Department of Biology, College of Biological Sciences and Biotechnology, Chungnam National University) ;
  • Lee, Jae-Hoon (Department of Biology, College of Biological Sciences and Biotechnology, Chungnam National University) ;
  • An, Kwang-Guk (Department of Biology, College of Biological Sciences and Biotechnology, Chungnam National University)
  • Received : 2010.11.09
  • Accepted : 2010.12.10
  • Published : 2010.12.31
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Abstract

The study objects were to analyze long-term and seasonal variations of nutrients (N, P), suspended solids, N:P ratios, algal chlorophyll, and trophic state along with general water quality parameters in four sampling sites including two intake tower sites supplying drinking water in Daechung Reservoir. For the analysis, we used water quality long-term data sampled during 1998~2007 by the Ministry of Environment, Korea. Interannual and seasonal trends in inflow and discharge near the intake tower facilities over the ten years were directly influenced by rainfall pattern. The distinct difference between wet year (2003) and dry year (2001) produced marked differences in water temperature, pH, dissolved oxygen, organic matter contents, nutrients, and these variables influenced algal biomass and trophic state. Values of TP varied depending on the year and locations sampled, but monthly mean TP always peaked during July~August when river inflow and precipitation were maxima. In contrast, TN varied little compared to TP, indicating lower influence by seasonal flow compared to phosphorus. The number of E. coli were highest in Site 2 (Chudong intake tower) and varied largely, whereas at other sites, the numbers were low and low variations. Contents of chlorophyll-${\alpha}$ (CHL), as an estimation of primary productivity, varied largely depending on the year and season. The maximum of CHL occurred at Muneu intake tower (S4) during 2006 when the precipitation and inflow were lowest. In contrast, another CHL peak was observed in Site 2 (Chudong intake tower) in 2006 when one of the largest typoons (Ewinia) occurred and river runoff were maximum. So the CHL maxima were associated with both wet year (high flow, high nutrient supply) and dry year (low flow, nutrient supply by littoral zone). Such conditions influenced trophic states, based on Trophic State Index of nutrients and CHL. Based on all analyses, we can provide some clues for management and protection strategies of two intake tower sites.

Keywords

References

  1. An, K.-G. 2000. Monsoon inflow as a major source of in-lake phosphorus. Korean Journal of Limnology 33(3): 222-229.
  2. An, K.-G. 2001. Seasonal patterns of reservoir thermal structure and water column mixis and their modifications by interflow current. Korean Journal of Limnology 34(1): 9-19.
  3. An, K.-G., J.K. Kim and S.J. Lee. 2008. Reservoir trophic state and empirical model analysis, based on nutrients, transparency, and chlorophyll-a along with their relations among the parameters. Korean Journal of Environmental Biology 26(3): 252-263.
  4. An, K.-G. and S.S. Park. 2002. In situ experimental evidence of phosphorus limitation on algal growth in a lake ecosystem. Journal of Environmental Science and Health A 37(5): 913-924. https://doi.org/10.1081/ESE-120003597
  5. An, K.-G. and S.S. Park. 2003, Influence of seasonal monsoon on the trophic state d eviation in Asian reservoir. Water, Air, and Soil Pollution 145: 267-287. https://doi.org/10.1023/A:1023688819724
  6. An, K.-G., J.W. Seo and S.S. Park. 2001. Influence of seasonal rainfall on physical, chemical, and biological conditions near the intake tower of Taechung Reservoir. Korean Journal of Limnology 34(4): 327-336.
  7. Bing, S.-H., S.-W. Lee, S.-J. Hwang and I.-H. Oh. 2002. Seasonal variation of bacterial number and environmental factor in Daechung reservoir. Korean Journal of Limnology 35(2): 71-78.
  8. Carlson, R. 1977. A trophic state index for lake. Limnology and Oceanography 22(2): 361-369. https://doi.org/10.4319/lo.1977.22.2.0361
  9. Cheon, S.-U., J.-A. An, J.J. Lee, Y.-B. Yoo, K.-C. Bang and Y.-J. Lee. 2006. Relationship among inflow volume, water quality and algal growth in the dae-cheong lake. Journal of Korean Society on Water Quality 22(2): 342-348.
  10. Codd, G.A. and G.K. Poon. 1988. Cyanobacterial toxins, p. 283-296. In: Biochemistry of the Algae and Cyanobacteria (Rogers, L.J. and J.R. Gallon, eds.). Clarendon Press, Oxford.
  11. Horne, A.J. and C.R. Goldman. 1994. Limnology, 2nd ed. McGraw-hill, Inc., New York, USA.
  12. Kimmel, B.L. and A.W. Groeger. 1984. Factors Controlling Phytoplankton Production in Lake and Reservoirs. US EPA 440/5/84-001. 277-281.
  13. Kratzer, C.R. and P.L. Brezonik. 1981. A carlson-type trophic state index for nitrogen in Florida lakes. Water Resources Bullentin 17: 713-717. https://doi.org/10.1111/j.1752-1688.1981.tb01282.x
  14. Lee, J.J., J.H. Lee and J.G. Park. 2003. Relationships between the development of cyanobacterial bloom and the changes of environmental factors in lake Daechung. Korean Journal of Limnology 36(3): 269-276.
  15. Lee, S.-C, J.-H. Han and K.-G. An. 2008. Functional modifications of Daechung reservoir eutrophication by upper dam construction. Korean Journal of Limnology 41(3): 348-359.
  16. Park, J.G. 2005. Water environmental factors and trophic states in lake Dacheong. Korean Journal of Limnology 38(3): 382-392.
  17. Persson, P.E. 1982. Muddy odour: A problem associated with extreme eutrophication. Hydrobiology 86: 161-164. https://doi.org/10.1007/BF00005805
  18. Pouria, S., A. de Andrade, R.L. Cavalcanti, V.T.S. Barreto, C.J. Ward, W. Preiser, G.K. Poon, G.H. Neildd and G.A. Cood. 1998. Fatal microcystin intoxication in haemodialysis unit in Caruaru, Brazil. The Lancet 352: 21-26. https://doi.org/10.1016/S0140-6736(97)12285-1
  19. Reynold, C.S. 1984. The Ecology of Freshwater Phytoplankton. Cambridge University Press, New York.
  20. Robert, R., F.S. Soong, J. Fitzgerald, L. Turezynowicz, O.E. Saadi, D. Roder, T. Maynard and I. Falconer. 1993. Health effects of toxic cyanobacteria (Blue-green algae). National Health and Medical Research Council, Adelaide, Austalia.
  21. Smith, B.A.D. and J.J. Gilbert. 1995. Relative susceptibilites of rotifers and cladocerans to Microcystis aeruginosa. Archives of Hydrobiology 132: 309-336.
  22. Thornton, K.W., R.H. Kennedy, J.H. Carrol, W.W. Walker, R.C. Gunkel and S. Ashby. 1981. Reservoir sedimentation and water quality. American Society of Civil Engineers, New York.
  23. Wetzel, R.G. 1983. Limnology. W.B. Saunders Co., Philadelphia, PA, USA.
  24. Yim, S.B. 2007. Water Management Coonfiguration for the Surrounding Area of Deachung Reservoir. Research Report of Daejeon Development Institute. 2007-10.