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한강유역 조류경보제에 남조류 우점 예측인자 도입에 관한 연구

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

  • 김태균 (서울시상수도사업본부 암사아리수정수센터) ;
  • 최재호 (서울시상수도사업본부 암사아리수정수센터) ;
  • 이경주 (서울시상수도사업본부 암사아리수정수센터) ;
  • 김영배 (서울시상수도사업본부 암사아리수정수센터) ;
  • 유성종 (서울시상수도사업본부 암사아리수정수센터)
  • 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)
  • 투고 : 2014.02.11
  • 심사 : 2014.05.19
  • 발행 : 2014.05.31

초록

한강유역 조류경보제의 클로로필-a 농도는 남조류의 우점을 예측할 수 없어 본 연구에서는 남조류 개체수에 영향을 미치는 환경인자를 분석하여 남조류 우점 예측인자를 제시하였다. 2012년 1월~2013년 9월까지 하천의 계절변화에 따른 조류의 우점종을 분석한 결과, 저수온기인 1~4월에는 규조류, 5~6월에는 녹조류, 7~8월에는 남조류가 우점하는 것으로 나타났다. 또한, 남조류 개체수 증감에 영향을 미치는 영양염류(TN, TP), 기온, 강수량, 댐 방류량과의 상관성을 분석한 결과, 기온보다는 낮은 댐 방류량으로 댐 내의 체류시간이 길어져 남조류 개체수가 급속히 증가한 것으로 나타났다. 마지막으로 남조류 개체수와 TN:TP 농도 비를 분석한 결과 TN:TP 농도 비가 29 이하로 낮아질 때 남조류가 우점하는 것으로 분석되어 한강유역 조류경보제에 남조류 우점 예측인자인 TN:TP 농도 비를 도입할 필요가 있다.

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.

키워드

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피인용 문헌

  1. The Evaluation of Water Quality Using a Multivariate Analysis in Changnyeong-Haman weir section vol.29, pp.6, 2015, https://doi.org/10.11001/jksww.2015.29.6.625
  2. Characterization of Water Quality in Changnyeong-Haman Weir Section Using Statistical Analyses vol.38, pp.2, 2016, https://doi.org/10.4491/KSEE.2016.38.2.71