Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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A Study on the Water Quality Characteristics of the Reservoirs in Gwangju City

광주지역 저수지수 수질특성에 관한 연구

  • Kim, Dong-Soo (Gwangju Metropolitan Health & Environment Research Department) ;
  • Park, Jong-Whan (Yeongsan River Environmental Research Laboratory) ;
  • Kim, Yun-Hee (Gwangju Metropolitan Health & Environment Research Department) ;
  • Song, Hyung-Myung (Gwangju Metropolitan Health & Environment Research Department) ;
  • Park, Jong-Tae (Gwangju Metropolitan Health & Environment Research Department)
  • 김동수 (광주광역시보건환경연구원) ;
  • 박종환 (영산강물환경연구소) ;
  • 김연희 (광주광역시보건환경연구원) ;
  • 송형명 (광주광역시보건환경연구원) ;
  • 박종태 (광주광역시보건환경연구원)
  • Published : 2009.12.31
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Abstract

This study was performed to investigate the physico-chemical properties and phytoplankton concentration from February to December, 2007 in Gwangju area reservoirs. Water samples from 20 reservoirs were analyze d. As results of the water quality analysis, the average pH was 7.6 and annual pH were 6.3~9.6. The higher pH of 8.6~9.6 were showed from March to August due to eutrophication. Chlorophyll-a concentration ranged from 0.4 to $164.3\;mg/m^3$. The highest chlorophyll-a concentration was observed in August. BOD was correlated with SS, T-N, and Chlorophyll-a(R=0.82, 0.90 and 0.84) respectively. COD was correlated with BOD, SS and Chlorophyll-a(R= 0.89, 0.77 and 0.76) respectively. The T-N/T-P ratios were 4~281, so phosph orus was considered to be the limiting factor in most of points. The trophic state showed eutrophicate states in Gwangju reservoirs. Therefore it was necessary to monitor continuously. In order to monitor the reservoirs, an algae prediction system must be used.

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