대한공간정보학회지 (Journal of Korean Society for Geospatial Information Science)

  • 제23권2호
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  • Pages.17-26
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  • 2015
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  • 1598-2955(pISSN)
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  • 2287-6693(eISSN)
대한공간정보학회 (Korea Spatial Information Society)
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어류군집의 종분포모형을 이용한 수변지역 연결성 평가

Riparian Connectivity Assessment Using Species Distribution Model of Fish Assembly

  • 정승규 (서울대학교 농업생명과학연구원) ;
  • 이동근 (서울대학교 조경지역시스템공학부) ;
  • 류지은 (서울대학교 협동과정 조경학)
  • Jeong, Seung Gyu (Research Institute of Agriculture and Life Sciences, Seoul National University) ;
  • Lee, Dong Kun (Department of Landscape Architecture and Rural System Engineering, Seoul National University) ;
  • Ryu, Ji Eun (Interdisciplinary Program in Landscape Architecture, Seoul National University)
  • 투고 : 2015.04.13
  • 심사 : 2015.06.12
  • 발행 : 2015.06.30
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초록

하천 코리더는 종의 국소적 소멸을 예방하도록 분산과 이동을 원활하게 한다. 그러나 우리나라는 수변의 치수, 친수, 이수와 같은 기능을 중시한 결과 수중보, 댐과 같은 인공구조물 설치로 하천 코리더의 연결성을 약화시켜왔다. 본 연구는 강원도 횡성의 섬강을 대상으로 어류의 군집에 영향을 미치는 변수를 종분포모형을 이용하여 추출하고 수변지역의 연결성을 종풍부도와 희귀도로 평가하는 것이다. 현장조사 결과 출현종수는 38종 7,061개체로 나타났으며, 연구결과는 다음과 같다. 첫째, 종분포모형 결과 어류의 종풍부도에 영향을 주는 변수는 유속과 급여울, 하천의 폭과 수변의 면적으로 선택되었으며, 모형의 정확도 검증 결과 상관계수는 0.83, 절대평균오차는(MAPE)는 19.2%로 적합한 것으로 나타났다. 둘째, 희귀도가 낮은 지점은 수로가 직강화된 전천과 횡성군 시가화지역 인근으로 나타났으며, 높은 지점은 하천 폭이 넓고 섬강과 전천이 합류하는 지점과 하도습지가 있는 하류지점으로 분석되었다. 연결성이 낮은 지점은 수변의 완충림이 거의 없고 보(洑)가 설치되어 있는 지점으로 나타났으며, 높은 지점은 하천 주변에 농경지 및 산림과 같은 자연토지피복이 우점하고 수변의 모래/자갈의 비율이 높은 곳이 연결성이 높게 평가되었다. 본 연구에서 제시한 결과는 복원을 위한 가이드로 기존 수변 시설물을 개선하고 추가하여 연결성을 강화시키는데 좋은 기준이 될 것으로 판단한다.

River corridors facilitate dispersal and movement and prevent local extinction of species. As a result of stream restoration projects, which include installation of waterfront and flood control structures, the number of animals, which rely on river corridor, is decreasing. For the study, factors affecting fish assembly were extracted by a species distribution model with the fish data collected from the Seom River in Hoengseong County and City of Wonju, Ganwon Province, Korea between March to October 2013. The riparian connectivity was assessed using species richness and rarity. According to result of the field survey, there were 38 species and 7,061 individuals for fish. The analysis suggests the following. Firstly, factors affecting fish richness in species distribution model results are shown to be velocity, riffle, riparian width, and water width. The accuracy of the model proves to be suitable with the correlation coefficient of 0.83 and MAPE of 19.2%. Secondly, the low rarity area is shown to be straight streams in Jeon river near to Hongseong County and the high rarity area to be streams with large width, existing alluvial area at channel junction between Jeon river and Seom river. Thirdly, according to connectivity results, areas where weirs are installed or riparian buffer area is removed showed low connectivity. The areas where farmland near riparian and forest areas showed high connectivity. The results of this study can be utilized to improve current facilities and enhance connectivity as a restoration guide.

키워드

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