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2020 Vol.7, Issue 4 Preview Page

Original Article

Evaluation of Habitat Diversity Changes by Weir Operation of the Sejongbo Weir in Geum River using High-resolution Aerial Photographs

항공사진을 이용한 금강 세종보 수문개방에 따른 서식처 다양도 변화 분석

Giyoung Ock1*
,
Mikyoung Choi2
,
Jeong-cheol Kim3
,
Hyung-Geun Park4
,
Ji Hyun Han5
옥 기영1*
,
최 미경2
,
김 정철3
,
박 형근4
,
한 지현5
1Senior Researcher, Department of Ecosystem Assessment, National Institute of Ecology, Seocheon 33657, Korea
2Researcher, International Water Resources Research Institute, Chungnam National University, Daejeon 34134, Korea
3Associate researcher, Department of Ecosystem Assessment, National Institute of Ecology, Seocheon 33657, Korea
4Researcher, Department of Ecosystem Assessment, National Institute of Ecology, Seocheon 33657, Korea
5Deputy Manager, MOE Committee for Investigation and Evaluation of the Four Major Rivers, Korea Water Resources Corporation, Daejeon 34045, Korea
1국립생태원 생태평가연구실 선임연구원
2충남대학교 국제수자원연구소 연구원
3국립생태원 생태평가연구실 전임연구원
4국립생태원 생태평가연구실 연구원
5한국수자원공사 환경부4대강조사평가단 차장
*Corresponding Author
31 December 2020. pp. 366-373
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Abstract

This study investigated habitat diversity changes by conducting weir operations at the Sejongbo site in the Geum River basin. High-resolution aerial photographs taken before and after the weir-opening operation were used for habitat analyses. We classified water and bar areas into 17 types, such as lotic habitats, including riffles, runs, and glides, and lentic habitats, including reservoirs, pools, bar-head backwaters, and bar ponds. Then, we estimated each habitat area quantitatively, calculated a habitat diversity index, and established a habitat diversity map. Our results indicated that after the weir-opening operation, lotic habitats and new types of shallow lentic habitats increased in the water area. In addition, for the bar area, bare lands without cultivation increased distinctively. Finally, we observed that the habitat diversity index drastically increased after the weir-opening operation, which could provide a relatively simple channel of diverse habitats.

Keywords
Bar geomorphology
Ecosystem function
Habitat diversity
Weir operation

세종보 수문개방을 통하여 하도내에 다양한 모래톱이 만들어지면서 모래톱의 생태계 가치와 기능에 대한 연구 필요성이 증가하고 있다. 본 연구는 세종보 수문개방 전･후의 하도 내 지형 변화를 생태지형학적으로 분석하여 서식처의 관점에서 보 개방 효과를 규명하고자 하였다. 이를 위해 고해상도 항공사진의 공간분석을 수행하여, 수역과 육역을 17개 서식처 유형으로 분류하여 서식처다양도 지도를 작성하고 서식처다양도 지수를 산정하였다. 연구결과, 보 상류는 개방 전 저수지였던 깊은 정수성 서식처에서, 개방 후에는 여울과 소, 평여울, 완여울 등 유수성 서식처가 증가하고 얕은 정수성 서식처가 나타나는 등 수중 서식처의 유형이 다양해지고 복잡해졌다. 보 하류에서도 모래톱이 확장되면서 식생이 정착되지 않은 나지형 사주가 나타나고, 유수성 서식처가 증가하였다. 이러한 변화들을 종합하면 보 개방후 서식처다양도 지수가 크게 향상되는 것을 실증적으로 규명하였다. 앞으로 이러한 연구를 기반으로 모래톱의 생태계 가치를 하천관리와 복원에 적용할 수 있는 응용생태 분야의 연구기술 개발이 더욱 요구된다.

키워드
사주 지형
생태계 기능
서식처 다양성
보 개방
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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 : 7
  • No :4
  • Pages :366-373
  • Received Date : 2020-12-14
  • Revised Date : 2020-12-18
  • Accepted Date : 2020-12-18
  • DOI :https://doi.org/10.17820/eri.2020.7.4.366
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