Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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The riparian vegetation community models according to hydrologic and soil environments - Case of Daecheongho lake reservoirs -

수문 및 토양환경을 고려한 수변식생군락 조성 모델 - 대청호 저수지를 사례로 -

  • Received : 2016.12.09
  • Accepted : 2017.02.09
  • Published : 2017.02.28
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Abstract

The riparian vegetation is one of corridor type ecosystems, an ecotone and able to improve the ecological soundness by structural and functional link. And they act as habitats, sources and sinks of species, conduits, filters and barriers. This study was carried out to develop the vegetation model for the fluctuation areas of lake reservoirs consider of hydrologic and soil environments according to the vegetation structure of the reference ecosystem. To develop the case study, 2 sites within 10degree slope of the Daecheong Lake were selected. The riparian vegetation models were built by the results of GIS analysis, remote satellite analysis, field survey results, consider of water level, flooded frequency, soil and topographic index, land cover or land use etc. 1) study area varied from FWL to -5m of NFWL, 2) slope 10% below, 3) vegetations flooded below 100days yearly are Salix koreensis, Salix chaenomeloides, Salix gracilistyla, 4)land cover type classified wildlife grassland, abandoned paddy field, cropland according to landuse (or landcover), 5)finally model was constructed as ecological landscape forest. The model designs were suggested by 2 types in Daecheong lake reservoir. The model for the riparian vegetation corridors could be the basic and useful data to improve the ecological and landscape properties.

수변식생은 코리도형 생태계로서 수생태계와 육상생태계 사이의 전이지대이며, 구조적으로나 기능적으로 연계를 통해 생태계 건강성을 향상시킬 수 있게 된다. 이러한 수변생태계는 서식처, 종의 공급원과 수요처, 이동통로, 필터와 장벽 등의 기능을 갖는다. 본 연구는 표준생태계의 식생구조를 바탕으로 저수지 수위변동구간의 수문환경 및 토양환경을 고려하여 도입 가능한 식생모델을 구축하기 위해 수행되었다. 경사도 10%이내의 완경사지를 중심으로 식생모델 적용 대상지 2개소를 선정하였다. 수변식생 모델은 GIS분석과 위성영상, 현지조사 결과에 따라 수위 및 침수빈도, 토양 및 지형인자, 토지피복(이용) 형태를 기준으로 구축하였으며, 구체적으로는 다음과 같다. 첫째, 수변식생 도입 가능구역으로는 계획홍수위 지점에서 만수위의 -5m 지점까지로 하였다. 둘째, 식재를 위한 수변지역 경사도는 $10^{\circ}$ 이하이다. 셋째, 연평균 100일 침수까지 생육 가능한 수종은 버드나무, 왕버들, 갯버들 등이다. 넷째, 토지피복(이용) 형태에 따라 야생초지(개여뀌, 이삭사초, 강아지풀, 가막사리, 물억새, 갈대, 망초, 달맞이꽃 등), 묵논(기존 경작지), 밭(기존 경작지)으로 분류하였다. 다섯째, 수변식생 기능을 생태경관림으로 설정하여 모델을 구축하였다. 이를 바탕으로 대청호 2개소를 선정하여 모델식재를 제안하였다. 본 연구에서 제안된 수변식생 모델은 저수지 및 하천 수변식생대의 생태적 기능과 경관성을 향상하기 위한 기초자료로 유용할 것이다.

Keywords

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