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2019 Vol.6, Issue 3 Preview Page

Original Article

A Study on the Improvement of Fish Habitat through Various River Restoration Techniques in the Wonju-cheon Stream, Korea

다양한 하천복원 기술을 통한 원주천의 어류 서식처 향상에 대한 연구

Jongjoo Kim1
,
Jonggeun Choi1
,
Heung Sik Choi2*
김 종주1
,
최 종근1
,
최 흥식2*
1Master Student, Department of Civil Engineering, Sangji University, Wonju 26339, Korea
2Professor, Department of Civil Engineering, Sangji University, Wonju 26339, Korea
1상지대학교 토목공학과 석사과정
2상지대학교 토목공학과 교수
* Corresponding Author
30 September 2019. pp. 145-153
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Abstract

The present study performed the impact of the change of low-flow channel on aquatic habitat in a reach of the Wonju-cheon Stream, Korea. The target species was Zacco platypus, a dominant species in the middle- and upper-stream of Wonju Cheon. The River2D model was used for the computation of the flow and the habitat suitability index model was used to estimate the quantity and quality of fish habitat using habitat suitability curves. First, for the restoration to low-flow channel, the restoration was conducted in a form close-to-nature flow channel, and the width of the low-flow channel was expanded and reduced. The results indicated that the Weighted Usable Area (WUA) of the target species improved by about 72% when the width of the low-flow channel was expanded, and that the fish habitat decreased by about 25% when the width of the low-flow channel was reduced.

Keywords
Change of low-flow channel
Close-to-nature flow channel
Dominant species
Physical habitat simulation
Weighted usable area

본 연구는 저수로 변화를 통한 하천 복원이 수생 서식처에 미치는 영향을 파악하기 위하여 원주천을 대상으로 물리서식처분석을 수행하였다. 대상 어종은 원주천에 서식하는 우점종인 피라미를 대상으로 하였다. 흐름 분석은 2차원 모형인 River2D 모형을 사용하였으며, 서식처 분석은 서식처 적합도 곡선을 이용하여 서식처의 양과 질을 산정하는 서식처 적합도 모형을 사용하였다. 먼저 저수로 복원을 위하여 자연 하도에 가까운 형태로 복원을 하고 저수로 폭을 확대 및 축소하여 설계하였다. 그 결과 저수로 폭의 변화를 확대하였을 때 대상 어종의 가중가용면적은 각각 약 72% 향상되었으며, 저수로 폭을 축소하였을 때는 서식처가 약 25% 악화되는 것으로 나타났다.

키워드
저수로 변화
자연형 하도
우점종
물리 서식처 분석
가중가용면적
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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 6
  • No :3
  • Pages :145-153
  • Received Date : 2019-09-10
  • Revised Date : 2019-09-16
  • Accepted Date : 2019-09-16
  • DOI :https://doi.org/10.17820/eri.2019.6.3.145
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