Experimental study on non-linear throughflow characteristics of rockfill gabion weir

Ilyeong Han; Jaejoung Lee; Gyoo bum Kim

doi:10.3741/JKWRA.2020.53.10.861

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2020 Vol.53, Issue 10 Preview Page Next Page

Research Article

Experimental study on non-linear throughflow characteristics of rockfill gabion weir 돌망태 보 통과류의 비선형적 흐름 특성에 관한 실험적연구

31 October 2020. pp. 861-870

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Abstract

As the flow velocity and Reynolds number increase in rockfill porous media, the flow deviates from Darcy conditions. In this study, the permeability tests of rock column specimen and laboratory gabion weir model were carried out to investigate a head loss behaviour of flow through rockfill deposition in small river artificial recharge. Through column test, the nonlinear relationships between flow velocity and hydraulic gradient and coefficients were determined and the correlation formula of hydraulic mean radius and coefficients was proposed. The flow velocities and discharges in voids estimated by proposed equations were well matched with the measured values of laboratory gabion weir model.

Keywords

Porous media

Permeability test

Rock column specimen

Laboratory gabion weir model

Hydraulic mean radius

자갈 입자로 구성된 다공성매질에서는 유속이 증가하여 레이놀즈수가 커지게 되면 흐름은 Darcy의 영역을 벗어나게 된다. 본 연구는 인공함양 유역의 소하천에 설치예정인 돌망태 보의 채움재를 통과하는 비선형적인 흐름특성을 규명하기 위하여 자갈칼럼과 돌망태모형을 이용한 투수실험을 수행하였다. 칼럼실험을 통하여 공극유속과 수리경사의 관계식과 계수를 결정하고, 수리평균반경과의 상관관계식을 제안하였다. 제안식으로 부터 계산된 공극유속과 공극유량은 돌망태모형 투수실험의 측정치와 잘 일치하였다.

키워드

다공성매질

투수실험

자갈칼럼

돌망태 모형

수리평균반경

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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 :10
Pages :861-870
Received Date : 2020-08-05
Revised Date : 2020-08-28
Accepted Date : 2020-08-28
DOI :https://doi.org/10.3741/JKWRA.2020.53.10.861

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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