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Delineation and Land Use Analysis of the Isolated Former Floodplain in the Nakdong River, Korea

낙동강에서 격리된 과거 홍수터의 경계 설정과 토지이용 분석

Seung-Nam Jin1
,
Kang-Hyun Cho1
,
Hyung-Jin Cho2*
진 승남1
,
조 강현1
,
조 형진2*
1Department of Biological Sciences, Inha University
2ECOnGEO
1인하대학교 생명과학과
2수생태공간정보연구소
*교신저자. *Corresponding Author. 
31 December 2015. pp. 324-329
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Abstract

For the restoration of lateral connectivity between rivers and floodplains, it is important to find the isolated former floodplain (IFF) and to characterize its land use in Korean rivers which were channelized by levee constructions for flood protection. The aim of this study is to map the IFF and to assess its land use pattern in the Nakdong River, Korea. The isolated former floodplain was explored by being overlapped on a digital elevation model (DEM), digital topographic map and design flood level using a geographical information system (GIS) in the Nakdong River basin. The land use of the identified IFF was classified by land-use map. The total number of IFFs was 384 and their total area was 291 km2. While IFFs were usually surrounded by mountain forest in the upper river area, they tended to be located on wide plain areas in the downstream area of Nakdong River. The land use pattern of IFFs was mostly farmland (73.9%) and urban areas (12.7%) in the river. The results of delineation and land use analysis of isolated former floodplain in the Nakdong River will be used as a base line data for planning stream restoration.

Keywords
Geographical information system
Isolated former floodplain
Land use pattern
Lateral connectivity
Stream

우리나라의 하천은 대부분 치수를 위한 제방공사를 통해 직강화되어 있다. 하천과 홍수터의 횡적 연결성을 회복하기 위해서는 제방에 의해 격리된 과거 홍수터를 탐색하고 현재 토지이용현황을 파악하는 것이 중요하다. 본 연구의 목적은 낙동강에서 제내지의 격리된 과거 홍수터를 탐색하고 토지이용현황을 분석하는 것이다. 격리된 과거 홍수터는 지리정보시스템 (GIS)을 이용하여 낙동강 유역에서 수치표고모델, 연속수치지도 및 계획홍수위를 중첩하여 산출하였다. 탐색된 격리된 과거 홍수터의 토지이용현황은 토지피복도를 이용하여 분류하였다. 낙동강에서 격리된 과거 홍수터는 총 384지점이 탐색되었으며, 전체면적은 291 km2이었으며, 상류지역에서는 주로 산지에 둘러 쌓인 형태였고, 하류지역에서는 넓은 개활지의 형태로도 분포하였다. 격리된 과거 홍수터의 토지이용은 농경지 (73.9%)와 시가화지역 (12.7%)이 대부분을 차지하였다. 낙동강에서 탐색된 격리된 과거 홍수터와 토지이용 현황은 향후 하천 복원 계획에 기초자료로 이용될 수 있을 것이다.

키워드
지리정보시스템
격리된 과거 홍수터
토지이용 현황
횡적 연결성
하천
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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 : 2
  • No :4
  • Pages :324-329
  • Received Date : 2015-12-04
  • Revised Date : 2015-12-07
  • Accepted Date : 2015-12-20
  • DOI :https://doi.org/10.17820/eri.2015.2.4.324
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