Study on Introduction to Predicting Indicator of Cyanobacteria Dominance in Algae Bloom Warning System of Hangang Basin

한강유역 조류경보제에 남조류 우점 예측인자 도입에 관한 연구

  • Kim, Tae Kyun (The office of Waterworks, Seoul Metropolitan Government Amsa Arisu Water Purification Center) ;
  • Choi, Jae Ho (The office of Waterworks, Seoul Metropolitan Government Amsa Arisu Water Purification Center) ;
  • Lee, Kyung Ju (The office of Waterworks, Seoul Metropolitan Government Amsa Arisu Water Purification Center) ;
  • Kim, Young Bae (The office of Waterworks, Seoul Metropolitan Government Amsa Arisu Water Purification Center) ;
  • Yu, Sung Jong (The office of Waterworks, Seoul Metropolitan Government Amsa Arisu Water Purification Center)
  • 김태균 (서울시상수도사업본부 암사아리수정수센터) ;
  • 최재호 (서울시상수도사업본부 암사아리수정수센터) ;
  • 이경주 (서울시상수도사업본부 암사아리수정수센터) ;
  • 김영배 (서울시상수도사업본부 암사아리수정수센터) ;
  • 유성종 (서울시상수도사업본부 암사아리수정수센터)
  • Received : 2014.02.11
  • Accepted : 2014.05.19
  • Published : 2014.05.31


The chlorophyll-a concentration in algae bloom warning system of Hangang basin did not predict the cyanobacteria dominance. In this study, suggest the predicting indicator of cyanobacteria dominance through analyzing the environmental factors affecting on the cell count of cyanobacteria. Firstly, the dominance of algae was analyzed with seasonal variation during Jan. 2012~Sep. 2013. The diatom dominated phytoplankton communities during the period of January~April. In the May~June, the green algae dominated. And, the dominance of algae was changed to cyanobacteria in the July~August. Also, the environmental factors affecting to cyanobacteria blooms ; nutrients (TN, TP), temperature, precipitation, dam-discharge were evaluated during the study period. Rather than temperature factor, relatively low dam discharge causes cyanobacteria to grow rapidly and create a blooms. The low dam-discharge may increase the water retention time. Finally, it is proved that a low ratio of TN to TP (<29:1) can favour the development of cyanobacteria blooms. Thus, the predicting indicator (TN:TP) have need to apply to the alarm bloom warning system of Hangang basin.


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