KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Analysis of Hydraulic Passage Efficiency of Ice-Harbor Type Fishway for Flowrate Change

유량변화에 따른 아이스하버식 어도의 수리학적 이동효율 분석

  • 조재안 (인제대학교 환경공학과) ;
  • 한은진 (인제대학교 환경공학과) ;
  • 김영도 (인제대학교 환경공학과(낙동강유역환경연구센터)) ;
  • 백경오 (국립한경대학교 토목안전환경공학과)
  • Received : 2013.04.04
  • Accepted : 2013.05.23
  • Published : 2013.09.30
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Abstract

The various types of fishways are installed at the multi-functional weirs in the four major rivers to minimize the negative effect due to the construction of the transverse structures. The movable weir was installed at the upstream of the ice-harbor type artificial fishway of the Dalseong weir in the Nakdong river, which can control the fishway flowrate regardless of the river flowrate. The incoming flowrate to the artificial fishway is closely related with the hydraulic characteristics that dominate the fish passage efficiency. Thus, it is crucial to find out the weir operation rule for properly sustaining efficient fish-passage, such as the optimized flowrate. In this study, the FLOW-3D was used to analyze and compare the various hydraulic characteristics associated with the passage efficiency, based upon the given different flowrate, and subsequently provide the optimized flowrate for the fishway movable weir to maintain the best efficient flow condition for the fish-passage.

4대강에 설치된 16개의 다기능보에는 횡단구조물의 건설로 인한 생태계의 악영향을 최소화하기 위해 다양한 형태의 어도가 설치되어 있다. 달성보에 설치된 아이스 하버식 인공형 어도는 상류측에 가동보를 설치하여 하천유량에 상관없이 어도 내로 일정한 양을 통수시킬 수 있다. 어도의 유입유량은 내부의 수리적 특성과 밀접한 관계가 있으며, 이는 어류의 이동효율에 영향을 준다. 그러므로 어도의 이동효율을 효율적으로 관리하기 위하여 최적 유입유량 등의 다기능보 운영조건을 산정하는 것이 매우 중요하다. 본 연구에서는 낙동강 달성보의 아이스하버식 인공형 어도를 대상으로 FLOW-3D 모형을 이용하여 유량에 따른 수리특성과 이동효율을 분석하였고, 이동효율을 고려한 최적의 어도 가동보 유량 조건을 제시하였다.

Keywords

References

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