한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제23권6호
  • /
  • Pages.934-944
  • /
  • 2007
  • /
  • 2289-0971(pISSN)
  • /
  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
권호 표지

홍수시 대청호 유역에 발생하는 탁수의 물리적 특성

Characterization of Physical Properties of Turbid Flow in the Daecheong Reservoir Watershed dining Floods

  • 정세웅 (충북대학교 환경공학과) ;
  • 이흥수 (충북대학교 환경공학과) ;
  • 윤성완 (국립환경과학원 금강물환경연구소) ;
  • 예령 (충북대학교 환경공학과) ;
  • 이준호 (충주대학교 환경공학부) ;
  • 추창오 (경동정보대학 하천환경기술연구소)
  • Chung, Se Woong (Department of Environmental Engineering, Chungbuk National University) ;
  • Lee, Heung Soo (Department of Environmental Engineering, Chungbuk National University) ;
  • Yoon, Sung Wan (Geum River environment Research Center, National Institute of Environmental Research) ;
  • Ye, Lyeong (Department of Environmental Engineering, Chungbuk National University) ;
  • Lee, Jun Ho (Division of Environmental Engineering, Chungju National University) ;
  • Choo, Chang Oh (Ecological River Environments Technology Institute, Kyungdong College of Techno-Information)
  • 투고 : 2007.10.11
  • 심사 : 2007.11.09
  • 발행 : 2007.11.30
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초록

Fine suspended solids (SS) induced into a reservoir after flood events play important ecological and water quality roles by presenting persistent turbidity and attenuating light. Thus the origin and physical features must be characterized to understand their transport processes and associated impacts, and for the establishment of watershed based prevention strategies. This study was aimed to characterize the physical properties of the SS sampled from Daecheong Reservoir and its upstream rivers during flood events. Extensive field and laboratory experiments were carried out to identify the turbidity-SS relationships, particle size distributions, settling velocity, and mineral compositions of the SS. Results showed that the turbidity-SS relationships are site-specific depending on the locations and flood events in the system. The turbidity measured within the reservoir was much greater than that measured in the upstream rivers for the same SS value. The effective diameters ($D_{50}$) in the rivers were in the range of $13.3{\sim}54.3{\mu}m$, while those in the reservoir were reduced to $2.5{\sim}14.0{\mu}m$ due to a fast settling of large particles in the rivers. The major minerals consisting of the SS were found to be Illite, Muscovite, Albite, and Quartz both in the rivers and reservoir. Their apparent settling velocities at various locations in the reservoir were in the range of 0.06~0.13 m/day. The research outcome provides a fundamental information for the fine suspended particles that cause persistent turbidity in the reservoir, and can be used as basic parameters for modeling study to search watershed based optimal control measures.

키워드

과제정보

연구 과제 주관 기관 : 한국학술진흥재단

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