한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제27권6호
  • /
  • Pages.855-861
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  • 2011
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  • 2289-0971(pISSN)
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  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
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단기간 탁수와 유속 변동이 부착돌말류 성장에 미치는 영향

Short-term Effects of Turbid Water and Flow Rate on the Benthic Diatom Community in an Artificial Channel

  • 김백호 (건국대학교 환경과학과) ;
  • 박혜진 (건국대학교 환경과학과) ;
  • 민한나 (건국대학교 환경과학과) ;
  • 공동수 (경기대학교 생명과학과) ;
  • 황순진 (건국대학교 환경과학과)
  • Kim, Baik-Ho (Department of Environmental Science, Konkuk University) ;
  • Park, Hye-Jin (Department of Environmental Science, Konkuk University) ;
  • Min, Han-Na (Department of Environmental Science, Konkuk University) ;
  • Kong, Dong-Su (Department of Biological Science, Kyunggi University) ;
  • Hwang, Soon-Jin (Department of Environmental Science, Konkuk University)
  • 투고 : 2011.09.15
  • 심사 : 2011.10.30
  • 발행 : 2011.11.30
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초록

Short-term effects of current velocity and turbid water on the benthic diatom community and water quality were examined in artificial channel ($20{\times}200{\times}10cm$) with two different experiments. The first and second experiments were consisted of different current velocities such as 1 L/min., and 1, 3, and 6 L/min., respectively. The concentration of turbid water is prepared with loess and fixed at 10 and 20 times of the turbidity of control inflow (10 NTU, LTW), respectively. At experiment 1 (EXP-1), introduction of turbid water increased dissolved oxygen, electric conductivity, pH and turbidity, but there were no differences between low- (100 NTU, MTW) and high-turbid water (200 NTU, HTW). However, experiment 2 (EXP-2) did not change any environmental parameters except dissolved total and inorganic nitrogen like EXP-1. MTW in EXP-1 strongly stimulated the growth of benthic diatom, while both MTW (150 NTU) and HTW (300 NTU) in EXP-2 did not increase or decrease the diatom abundance. Over the study, the dominant species was four, Aulacoseira ambigua, Cyclotella stelligera, Aulacoseira granulata and Achnanthes minutissima. In EXP-1, two highest species in abundance, A. ambigua and A. granulata were highly grown in MTW, while Achnanthes minutissima high in HTW adversely. These results indicate that the introduction of turbid water can play an important role in the shift of water quality and benthic diatom community in stream ecosystem, especially inflow of soil water in low current velocity.

키워드

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