Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Characteristics of Water Quality and Biological Changes in the Onchun Stream -After the Flowing of the Nakdong River-

낙동강 유지용수 공급 후 온천천의 수질 및 생물변화 특성

  • Park, Hong-Ki (Water Quality Institute, Water Works HQ of Busan Metropolitan City) ;
  • Son, Jung-Won (Busan Metropolitan City Institute of Health and Environment) ;
  • Cho, Jin-Tack (Water Quality Institute, Water Works HQ of Busan Metropolitan City)
  • 박홍기 (부산광역시 상수도사업본부 수질연구소) ;
  • 손정원 (부산광역시 보건환경연구원) ;
  • 최진택 (부산광역시 상수도사업본부 수질연구소)
  • Received : 2012.05.16
  • Accepted : 2012.08.09
  • Published : 2012.08.30
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Abstract

This study investigated the changes caused by diverting water applications at the riverhead of the Onchun Stream via the monitoring of several water quality and biological parameters between 10/09 and 10/10. The analysis indicated that the Onchun Stream distinctly decreased in terms of several water quality parameters, such as BOD, COD, TN, TP, and the concentration of heavy metals as compared to similar values in 2005, before the flowing of the Nakdong River. Especially, BOD showed the 2nd grade of water quality, with an average of 2.0 mg/l at all sites. The species number and standing crops of plankton and benthic macroinvertebrates in the Onchun Stream were also increased. Thus, it was concluded that diverting water from the Nakdong River to the Onchun Stream dramatically improved various environmental indices, such as water quality and biological changes.

낙동강 유지용수가 공급되고 있는 온천천을 대상으로 2009년 10월부터 2010년 10월까지 수질 및 생물학적 인자변화를 조사하였다. 조사결과 온천천은 BOD, TN, TP 그리고 중금속 농도가 낙동강 유지용수가 공급되기 이전인 2005년에 비해 뚜렷하게 감소한 것으로 나타났으며, 특히 BOD 평균농도가 2.0 mg/l로 모든 지점이 2급수를 유지하였다. 또한 온천천 수중에 존재하는 플랑크톤과 저서성 대형 무척추동물의 종 및 개체수도 증가한 것으로 조사되었다. 결론적으로 낙동강 유지용수가 공급된 이후에 온천천은 수질 및 생물변화와 같은 물 환경인자가 상당히 개선되었음을 알 수 있었다.

Keywords

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