Analysis of Clogging Phenomena and Geotechnical Property Changes in Infiltration Soil Layers of LID Facilities Caused by Fine Particle Accumulation

Hyongjong Seo; Kwangkuk Ahn; Seungjae Lee; Hayong Kim

doi:10.14481/jkges.2025.26.6.35

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2025 Vol.26, Issue 6 Preview Page

Analysis of Clogging Phenomena and Geotechnical Property Changes in Infiltration Soil Layers of LID Facilities Caused by Fine Particle Accumulation LID 시설 침투층에서 미세입자 축적에 따른 클로깅 현상 및 지반물성 변화 분석

1 June 2025. pp. 35-43

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Abstract

This study experimentally investigated the clogging effects caused by fine particles in Low Impact Development (LID) facilities using a laboratory-scale soil column. Turbid water containing kaolin clay was repeatedly introduced to analyze changes in discharge rate, turbidity, and soil properties such as water content, dielectric constant, and electrical conductivity. As fine particles accumulated in the soil matrix, the infiltration delay increased markedly, and a corresponding decline in discharge rate was observed. Nevertheless, the effluent turbidity steadily decreased from an initial range of 685~1,357 NTU to 1.08~3.57 NTU, demonstrating the soil’s sustained filtration efficiency despite progressive clogging. The results demonstrate the hydraulic performance degradation due to clogging and provide a basis for effective maintenance strategies of LID systems.

Keywords

LID

Clogging

Fines

Turbidity

Soil column test

본 연구는 저영향개발(Low Impact Development, LID) 시설의 침투층에서 미세 입자에 의한 클로깅(clogging) 현상을 실험적으로 검토하였다. 실험실 규모의 토양 칼럼을 이용해 Kaolin 점토가 포함된 고탁도 탁수를 반복적으로 주입하고, 배출 유량, 탁도, 함수율, 유전 상수, 전기 전도도 등 다양한 토양 물성의 변화를 계측하였다. 그 결과, 토양 내 미세 입자의 누적에 따라 침투 지연 시간이 현저히 증가하였고, 이에 따른 배출 유량은 점진적으로 감소하였다. 반면, 초기 탁도 범위(685~1,357 NTU)는 실험이 진행됨에 따라 배출수의 탁도는 1.08~3.57 NTU 수준으로 반복 실험에도 불구하고 점진적으로 감소하였으며, 이는 클로깅이 진행되더라도 토양의 여과 효율이 일정 수준 유지됨을 시사한다. 본 연구는 클로깅으로 인한 수리 성능 저하를 정량적으로 입증하였으며, 향후 LID 시설의 유지관리 및 설계 기준 마련을 위한 기초자료로 활용될 수 있다.

키워드

저영향개발(LID)

클로깅

미세 입자

수리모형

투수 특성

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Information

Publisher :Korean Geo-Environmental Society
Publisher(Ko) :한국지반환경공학회
Journal Title :Journal of the Korean Geo-Environmental Society
Journal Title(Ko) :한국지반환경공학회 논문집
Volume : 26
No :6
Pages :35-43
Received Date : 2025-04-22
Revised Date : 2025-04-23
Accepted Date : 2025-05-07
DOI :https://doi.org/10.14481/jkges.2025.26.6.35

Journal of the Korean Geo-Environmental Society ISSN:1598-0820(Print) 2714-1233(Online) 한국지반환경공학회 논문집

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