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2023 Vol.10, Issue 4 Preview Page

Original Article

Assessment of Physical Habitats Characteristics in Naeseongcheon Basin Streams, Korea

내성천 유역 하천의 물리 서식지 특성 평가

Ki Heung Kim1*
,
Heareyn Jung2
,
Il Hong3
,
Hong Koo Yeo4
김 기흥1*
,
정 혜련2
,
홍 일3
,
여 홍구4
1Professor, Department of Civil and Infrastructure Engineering, Gyeongsang National University, Jinju 52725, Korea
2Researcher, Department of Civil and Infrastructure Engineering, Gyeongsang National University, Jinju 52725, Korea
3Senior researcher, Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea
4Senior research fellow, Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea
1경상국립대학교 건설시스템공학과 교수
2경상국립대학교 건설시스템공학과 연구원
3한국건설기술연구원 수자원하천연구본부 수석연구원
4한국건설기술연구원 수자원하천연구본부 선임연구위원
*Corresponding Author
31 December 2023. pp. 143-160
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Abstract

This study applied the stream physical habitat assessment system to obtain basic information for river restoration and watershed management in high-gradient and mid-gradient streams in the Naeseongcheon basin. The total length of high-gradient and mid-gradient streams in the Naeseongcheon basin is about 273 km, and as a result of the assessment, it was analyzed that suboptimal reach was about 8.2 km, normal reach was 180.3 km, and marginal reach was 84.7 km. In addition, the physical habitat quality of high-gradient streams was analyzed to be normal condition with an average of 106 points (53%), and in particular, the score of channel/hydraulic category, which is the most important for the habitat of aquatic animals, was analyzed to be normal, close to the limit, with an average of 54 points (45%). The physical habitat quality of mid-gradient streams was found to be in normal condition with an average of 90 points (45%), and the score of channel/hydraulic category was in marginal condition with an average of 39 points (32%). Overall, among 165 reaches of high-gradient and mid-gradient streams in the Naeseongcheon basin, 4 reaches (3%) were evaluated as suboptimal, 119 reaches (72%) were normal, and 42 reaches (25%) were considered marginal. These results showed that the physical habitat of Naeseongcheon was significantly disturbed. Disturbance of stream physical habitat in the Naeseongcheon basin occured due to farmland around stream, urbanization, reservoir construction, and river maintenance.

Keywords
Channel/hydraulic category
Disturbance
High-gradient
Mid-gradient
Stream restoration

본 연구는 내성천 유역의 급경사 및 중경사 하천에 하천복원 및 유역관리를 위한 기본 정보를 얻기 위해 하천의 물리 서식지 평가체계를 적용했다. 평가결과 내성천 유역의 급경사 및 중경사 하천 총연장은 약 273 km이며, 이 중에서 우수 약 8.2 km, 보통 180.3 km, 한계 84.7 km인 것으로 분석되었다. 또한 급경사 하천 전체의 물리 서식지 질은 평균 106점 (53%)으로 보통 등급이며, 특히 수서 동물의 서식처에 가장 중요한 하도/수리 영역은 평균 54점 (45%)으로 한계상태에 가까운 보통 등급인 것으로 분석되었다. 중경사 하천 물리 서식지 질은 평균 90점 (45%) 보통 등급이며, 하도/수리 영역 평균 39점 (32%) 한계상태로 나타났다. 전반적으로 내성천 유역의 급경사 및 중경사 하천 165개 구간 중 우수 4개 (3%), 보통 119개 (72%) 및 한계 42개 (25%) 구간으로 평가되었다. 이러한 결과는 내성천의 물리 서식지가 상당히 교란되었음을 보여준다. 내성천 유역의 하천 물리 서식지 교란은 하천주변의 경작지, 도시화, 저수지 건설 및 하천정비 등으로 발생하였다.

키워드
하도/수리 영역
교란
급경사
중경사
하천복원
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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 : 10
  • No :4
  • Pages :143-160
  • Received Date : 2023-12-04
  • Revised Date : 2023-12-12
  • Accepted Date : 2023-12-12
  • DOI :https://doi.org/10.17820/eri.2023.10.4.143
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