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2020 Vol.53, Issue 1 Preview Page

Review Article

Restoration design of step-pool sequence in mountain streams

산지하천의 스텝-풀 연속체 복원설계

Ki Heung Kima*
김 기흥a*
aProfessor, Department of Civil Engineering, Gyeongnam National University of Science and Technology
a경남과학기술대학교 토목공학과 교수
* Corresponding Author
31 January 2020. pp. 29-43
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Abstract

The purpose of this study is to propose the design criteria and detailed design model by reviewing the issues related to geometry, formation process, destruction process, hydraulic function, restoration and ecological function of the step-pool from the existing research results, to apply the step-pool sequences to river restoration. Based on the analysis and review results, the design criteria for the structure and size of the step-pool are presented as ratio of the step spacing and the channel width, ratio of the unit step slope and channel slope, and ratio of step height and the particle size. To ensure structural stability of the step, stability analysis method of overturning based on the keystone theory was proposed as a design criterion. As a detailed design concept, a layout model was proposed by applying the imbricating structure of keystones and arch stones to the planar, longitudinal and transverse configurations of the step-pool.

Keywords
Stream restoration
Channel slope
Step spacing
Step height
Imbricating structure

본 연구의 목적은 하천복원에 스텝-풀 연속체를 적용하기 위해 기존 연구결과에서 스텝-풀의 기하구조, 형성 과정, 수리 기능, 복원 및 생태 기능과 관련된 사항을 검토하여 설계기준 및 세부설계 모델을 제시하는 것이다. 분석 및 검토결과를 바탕으로 스텝 간격과 하폭의 비, 단위스텝경사와 하상경사의 비, 및 스텝 높이와 입경 비로서 스텝-풀의 구조 및 규모에 대한 설계기준을 제시하였고, 스텝의 구조적 안정성 확보를 위해서는 키스톤 이론을 근거로 전도에 대한 안정성 해석방법을 설계기준으로 제시하였다. 세부설계 개념으로서 스텝-풀의 평면, 종단 및 횡단 구성에 키스톤과 아치스톤에 대한 겹침구조를 적용한 배치 모델을 제안하였다.

키워드
하천복원
하도경사
스텝 간격
스텝 높이
겹침구조
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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 : 53
  • No :1
  • Pages :29-43
  • Received Date : 2019-10-28
  • Revised Date : 2019-11-23
  • Accepted Date : 2019-11-28
  • DOI :https://doi.org/10.3741/JKWRA.2020.53.1.29
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