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Journal of the Korean Society of Hazard Mitigation 2008;8(1):117-124.
Published online February 28, 2008.
1차원 및 2차원 물리서식처 모의를 이용한 어류서식조건 유지에 필요한 최적유량 산정 - 피라미를 대상으로 -
오국열, 이주헌, 최계운, 김도희, 정상만
Estimation of Optimum Flow Needed for Fish Habitat by Application of One and Two Dimensional Physical Habitat Simulation Model - Focused on Zacco Platypus -
Kuk-Ryul Oh, Joo-Heon Lee, Gye-Woon Choi, Do-Hee Kim, Sang-Man Jeong
Abstract
In this study, PHABSIM which is a sample for 1D physical habitat and River2D, which is a sample for 2D physical habitat were applied to the main streams of Han River in order to calculate an optimum flow considering the habitats of fishes in determining the instream flow. Moreover, the Weighted Usable Area (WUA) of the two samples in each growth step (adults and spawning) of the target fish type was compared and reviewed. The optimal flow value was calculated by considering the conditions for inhabiting fishes. As a result of the correlation analysis for WUA from 1D and 2D samples was 0.87 to 0.99. The optimum flow considering the conditions of inhabiting fishes showed insignificant difference of $3m^3/s;to;5m^3/s$ with the exception of adults in Moon-Mak and spawning in Dal-Chun.
Key Words: PHABSIM; River2D; Instream Flow; Fish Habitat
요지
본 연구에서는 하천의 유지유량을 결정함에 있어서 어류의 서식처를 고려한 최적의 유량을 산정하기 위하여 한강수계의 주요지천에 1차원 물리서식처 모의 모형인 PHABSIM과 2차원 물리서식처 모의 모형인 River2D를 적용하였다. 또한 대상어종의 성장단계별(성어기 산란기) 두 모형의 가중가용면적(WUA)에 대하여 비교검토하였으며 어류서식조건을 고려한 최적유량 값을 산정하였다. 모의결과 1차원 모형과 2차원 모형에서 가중가용면적(WUA)의 상관분석 결과 $0.87{sim}0.99$로 분석되었고 어류서식조건을 고려한 최적유량 역시 문막 지점의 성어기와 달천지점의 산란기를 제외하고 $3m^3/s{sim}5m^3/s$의 차이로 큰 차이를 보이지 않았다.
핵심용어: 유지유량; 어류서식처
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