환경영향평가 (Journal of Environmental Impact Assessment)

한국환경영향평가학회 (Korean Society of Environmental Impact Assessment)
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Chlorophyll-a의 히스토그램 분석을 통한 녹조발생 우심지역 분류

Classification of the Algal Monitoring Points by Histogram Analysis of Chlorophyll-a

  • 이새로미 (한국건설기술연구원 국토보전연구본부) ;
  • 안창혁 (한국건설기술연구원 국토보전연구본부) ;
  • 박재로 (한국건설기술연구원 국토보전연구본부)
  • Lee, Saeromi (Department of Land,Water and Environment Research, Korea Institute of Civil Engineering and BuildingTechnology) ;
  • Ahn, Chang Hyuk (Department of Land,Water and Environment Research, Korea Institute of Civil Engineering and BuildingTechnology) ;
  • Park, Jae Roh (Department of Land,Water and Environment Research, Korea Institute of Civil Engineering and BuildingTechnology)
  • 투고 : 2019.10.30
  • 심사 : 2019.12.16
  • 발행 : 2020.02.29
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초록

본 연구에서는 Chlorophyll-a (Chl-a)값을 빈도분석인 히스토그램(histogram)을 통해 녹조관리가 필요한 지점을 분류 하고자 하였다. 누적도수분포곡선(ogive curve)에 따라 지점별 녹조발생정도를 분석하였고, 히스토그램의 형태에 따라 관리지점을 3단계로 분류하였다. 4대강 중 한강에서 저농도의 Chl-a가 가장 많이 나타났고, 금강과 영산강 지점에서 높은 농도의 Chl-a가 빈번하게 나타났다. 히스토그램의 패턴에 따라 녹조의 관리 정도를 분류 할 수 있었는데, 한강의 경우 집중관리가 필요한 지점이 나타나지 않았고, 금강과 영산강은 대부분의 지점에서 녹조관리가 필요한 것으로 나타났다. 마지막으로 낙동강은 중류 및 하류 지점부터 녹조관리가 필요한 지점으로 분류되었다. 본 연구결과를 통해 빈도분석이 녹조발생의 우심지역 판단의 보조지표 활용 가능성 여부를 확인하였다.

In this study, we analyzed the value of Chl-a by histogram to classify the points where algal management is required. The degree of algal bloom by point was analyzed using the ogive curve, and the algal control points were classified into three stages according to the shape of the frequency distribution table. Of the four major rivers, low concentration of Chl-a appeared most frequently in the Han River, while the high concentration of Chl-a was frequently found at the points of the Geum and the Yeongsan Rivers. In the case of the Han River, no apprehensive areas were found thatrequire intensive management, while most points on the Geum and the Yeongsan Rivers required algal management. Finally, the Nakdong River basin was identified as points requiring algal management from the mid to downstream. The results of this study have confirmation of the possibility that the frequency distribution could be used as a supplementary indicator to express the algal bloom.

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참고문헌

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