Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Physical Habitat Modeling in Dalcheon Stream Using Fuzzy Logic

퍼지논리를 이용한 달천의 물리서식처 모의

  • Jung, Sang-Hwa (River and Coastal Research Division, Korea Institute of Construction Technology) ;
  • Jang, Ji-Yeon (Department of Civil & Environmental Engineering, Yonsei University) ;
  • Choi, Sung-Uk (Department of Civil & Environmental Engineering, Yonsei University)
  • 정상화 (한국건설기술연구원) ;
  • 장지연 (연세대학교 대학원 토목환경공학과) ;
  • 최성욱 (연세대학교 공과대학 토목환경공학과)
  • Received : 2011.12.14
  • Accepted : 2012.01.12
  • Published : 2012.02.29
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Abstract

This study presents a physical habitat modeling of adult Zacco platypus in a reach of the Dalcheon Stream located downstream of the Goesaan Dam. CASiMiR model is used to estimate habitat suitability index based on the fuzzy logic. Results are compared with those from River2D model, which uses habitat preference curve for habitat suitability index. Hydraulic data simulated by River2D are used as input data for CASiMiR model after verification against field measurements. The result shows that the habitat suitability of the adult Zacco platypus is maximum around the riffle area located upstream of the bend. CASiMiR and River2D estimate the maximum weighted usable areas at the discharge rates of 7.23 $m^3/s$ and 9.0 $m^3/s$, respectively. Overall comparison of the two models employed in this study indicates that CASiMiR model overestimates the weighted usable area by 0.3~25.3% compared with River2D model in condition of drought flow (Q355), low flow (Q275), normal flow (Q185), and average-wet flow (Q95).

본 연구에서는 괴산댐 하류 달천에서 성어기 피라미에 대한 물리 서식처 모의를 수행하였다. 이를 위하여 퍼지논리에 의한 서식처 적합도 지수를 산정하는 CASiMiR 모형을 이용하였다. 또한 모의결과를 서식처 선호도 곡선을 이용하여 서식처 적합도 지수를 산정할 수 있는 수리모형인 River2D 모형의 결과와 비교, 분석하였다. CASiMiR 모형의 수위 자료는River2D 모형을 통한 수위계산결과를 활용하였으며 현장측정자료와 비교한 결과 잘 반영하는 것을 확인하였다. 대상구간의 만곡부 상류 직선구간에 있는 여울에서 성어기 피라미의 서식처가 가장 적합한 것으로 나타났다. CASiMiR 모형의 경우$7.23m^3/s$의유량조건에서가중가용면적이최대값을보였고, River2D 모형은$9m^3/s$의 유량에서 최대 가중가용면적을 예측하였다. 또한 갈수량(Q355), 저수량(Q275), 평수량(Q185), 풍수량(Q95) 유량조건에서CASiMiR 모형은River2D 모형에 비해 가중가용면적을 0.3~25.3% 정도 과대 추정하는 결과를 보였다.

Keywords

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