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2024 Vol.57, Issue 11

Research Article

Variable extent of channel network in small river basin

소유역 내 수로망의 가변성 범위

Joo-Cheol Kima
,
Chang-Lae Jangb*
,
Wonho Leec
김 주철a
,
장 창래b*
,
이 원호c
aResearcher, Industry-Academic Cooperation Foundation, Konyang University, Nonsan, Korea
bProfessor, Department of Civil Engineering, Korea National University of Transportation, Chungju, Korea
cProfessor, Department of Civil Engineering, Korea National University of Transportation, Chungju, Korea
a건양대학교 산학협력단 연구원
b한국교통대학교 건설환경도시교통공학부 교수
c한국교통대학교 건설환경도시교통공학부 교수
*Corresponding Author
30 November 2024. pp. 809-821
PDF XML Citation
Abstract

This paper aims to delineate the variable extent of channel networks for the Seolma Creek experimental basin. To this end, various channel networks are extracted from the digital elevation model (DEM) for the basin of interest, corresponding to the variation of source basin areas. The branching process of channel networks could be specified by the three scaling regimes of the total length of links (channel segments between two nodes such as a source and the first junction downstream, adjacent two junctions or the outlet and the first junction upstream) with source basin areas, each of which is featured by the expansion and elongation of channel networks, as well as the scale-invariant property of channel networks. The non-perennial channel segments around the perennial channel networks could be identified based on the scale-invariant property of source basins. The scaling regimes of the total length of links can give rise to an inference to the exponent value of the power law distribution for the drainage area of the basin of interest.

Keywords
Variable extent of channel networks
Source basins
Power law distribution

본 논문의 목적은 설마천 시험유역 내부에 존재하는 가변성(可變性) 수로망의 범위를 찾아보고자 하는 것이다. 이를 위하여 수원 유역의 면적 변화에 대응하여 다양한 수로망을 수치 고도 모형(DEM)으로부터 추출하였다. 수로망의 분기 과정은 수원 유역의 규모에 대한 link(수원과 하류 방향 첫 합류점, 인접한 두 합류점 혹은 출구점과 상류 방향 첫 합류점 사이의 수로 구간) 총 길이의 세 가지 특성 권역으로 기술될 수 있는데, 이들은 각각 수로망의 신장과 확장 및 규모 불변성 특성으로 분류할 수 있었다. 수원 유역의 규모 불변성을 기반으로 지속 수로망(perennial channel networks) 주변으로 비지속 수로 구간(non-perennial channel segments)이 출현할 수 있음을 확인할 수 있었다. 또한 전술한 link 총 길이의 특성 권역을 기반으로 대상 유역의 배수 면적에 대한 멱함수 법칙분포 지수에 대한 추론을 제공할 수 있었다.

키워드
수로망의 가변성 범위
수원 유역
멱함수 법칙분포
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 57
  • No :11
  • Pages :809-821
  • Received Date : 2024-08-03
  • Revised Date : 2024-10-06
  • Accepted Date : 2024-10-07
  • DOI :https://doi.org/10.3741/JKWRA.2024.57.11.809
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