Ecology and Resilient Infrastructure

Korean Society of Ecology and Infrastructure Engineering (응용생태공학회)
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Spatial Distribution Patterns and Planar Geometric Characteristics of Vegetated Bars in the Naesungcheon Stream

내성천 식생사주의 공간적 분포 유형과 평면 기하 특성

  • Jiwon Ryu (Civil and Environmental Engineering, KICT School, University of Science and Technology) ;
  • Eun-kyung Jang (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Un Ji (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology)
  • 류지원 (과학기술연합대학원대학교 건설환경공학) ;
  • 장은경 (한국건설기술연구원 수자원하천연구본부) ;
  • 지운 (한국건설기술연구원 수자원하천연구본부)
  • Received : 2024.09.10
  • Accepted : 2024.09.27
  • Published : 2024.09.30
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Abstract

This study classified spatial distribution patterns of vegetated bars in the Naesungcheon Stream, defined universally applicable planar geometric variables, and quantified characteristics of dominant vegetated bar distribution forms. The analysis identified four primary types of spatial distribution, with two types (vegetated alternate/point bars and vegetated floodplains with single or multi-vegetated bars) accounting for more than 90% of the study area. Study results indicated that relatively large vegetated bars tended to be widely spaced or distributed in combination with multiple smaller vegetated bars that were overlapped in the Naesungcheon stream. Quantified spatial distribution characteristics of vegetated bars derived from this study could be used as essential basis information for vegetation management in rivers similar to the Naesungcheon Stream. Additionally, analysis results for planar geometric variables and spatial distribution forms are expected to facilitate experimental designs that mimic river conditions in flood management and ecohydraulic studies, contributing to the interpretation of complex characteristics of interactions between vegetated bars, flow, and bed changes.

본 연구에서는 내성천 내 식생사주의 공간적 분포 형태를 분류하고, 이를 기반으로 범용적 적용이 가능한 평면 기하학적 변수를 정의하여 우점 분포 형태의 식생사주 특성을 정량화하였다. 분석 결과, 식생사주의 공간적 분포는 크게 네 가지 유형으로 분류할 수 있었으며, 그 중 식생이 분포하는 교호사주 및 점사주 유형과 하도 내 단일 또는 다수의 식생사주가 식생이 우거진 홍수터와 함께 분포하는 유형이 연구 대상 구간의 90% 이상을 차지하는 것으로 나타났다. 내성천은 비교적 큰 규모의 식생사주가 넓은 간격으로 연이어 분포하거나 중첩된 다수의 소규모 식생사주와 복합적으로 분포하는 경향이 있는 것으로 나타났다. 본 연구에서 도출된 내성천의 정량화된 식생사주의 공간적 분포 특성은 유사한 하천에서의 식생 관리에 중요한 기초 자료로 활용될 수 있을 것이다. 또한, 이러한 식생사주의 평면 기하학적 변수와 공간적 분포 형태에 대한 분석 결과는 홍수 관리와 생태수리학적 연구에서 실제 모습에 가까운 하천의 형태를 모사한 실험 설계가 가능하게 하여 식생사주와 흐름 및 하상변동의 복잡한 상호작용 특성을 해석하는 데 기여할 수 있을 것이다.

Keywords

Acknowledgement

This work was supported by Korea Environment Industry & Technology Institute (KEITI) through Climate Change Research Program, funded by Korea Ministry of Environment (MOE) (RS-2024-00332494).

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