Journal of the Korean Society of Hazard Mitigation (한국방재학회 논문집)

Korean Society of Hazard Mitigation (한국방재학회)
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Modeling of Suspended Solid Clogging of Porous Media in Urban Stormwater Infiltration Facility

도심 강우유출수 침투시설 다공질 여재의 부유물 폐색 모델링

  • 이병식 (공주대학교 공과대학 건설환경공학부) ;
  • 김이형 (공주대학교 공과대학 건설환경공학부) ;
  • 이관호 (공주대학교 공과대학 건설환경공학부) ;
  • 전평구 (공주대학교 대학원 건설환경공학과) ;
  • Received : 2014.09.15
  • Accepted : 2014.10.20
  • Published : 2014.12.31
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Abstract

Infiltration facilities are applied increasingly as effective BMPs to the urban stormwater control. The important functions of the facilities are surface flow reduction, contaminants elimination and aquifer recharge resulting from filtration, retention and infiltration of stormwater by porous media. A major obstacle in operating infiltration facilities is clogging. Filters of porous media in the facility are clogged by deposition of sediment over time. Clogging reduces infiltration rate and lifespan of the facility. Clogging, thus, needs to be considered as one of the important design factors in constructing infiltration facilities. In this study, 3 clogging models were chosen to simulate clogging, which developed in different disciplines, environmental and geotechnical engineering. Since the models were developed initially for fine media, applicability to coarse media interested in this study needed to be examined. To examine the applicability of models, analytical procedures of models were thoroughly reviewed. Parametric studies were also conducted to determine appropriate input parameters. Finally, the models represented relatively appropriate applicability to estimate clogging developed in an artificial infiltration as well as a real infiltration testing conditions. Although further studies are still needed for considerable aspects in input parameters and equations, the models could be suggested as effective analytical tools to estimate clogging developed in infiltration facilities of urban stormwater.

비점오염 관리 및 도시 물 순환 체계 개선을 위한 효과적인 환경시설로서 침투시설의 적용이 증가되고 있다. 침투시설은 다공질 여재를 통해 강우유출수를 여과, 저류 및 침투시켜 표면유출수 저감, 오염물질 제거, 지하수 충전 등의 주요 기능을 수행한다. 이 시설의 운영에 있어 주요 문제는 폐색현상이다. 시설 내 다공질 여재 필터가 시간에 따른 퇴적물 증가로 인해 폐색된다. 폐색은 시설의 침투율과 수명을 저하시킨다. 따라서 폐색현상은 침투시설 건설 시 필히 고려하여야 할 중요한 설계조건 중의 하나다. 이 논문에서는 환경, 지반 등 서로 다른 학문분야에서 개발된 3가지 폐색모델을 선정하였다. 모델들이 당초 입경이 작은 여재에 대해 개발되었으므로 이 논문에서 다루는 굵은 여재에 대한 적용성 검토가 필요하였다. 적용성 검토를 위해 모델 해석 과정을 상세히 검토하였다. 적정한 입력자료를 결정하기 위해 영향분석도 수행하였다. 결과적으로 모델들은 가상 침투실험 조건 및 실제 실험조건에서 발생하는 폐색현상 모델링에 있어서 적정 수준의 적용성을 가지고 있음을 보였다. 입력자료와 방정식 등에 대한 후속 연구가 요구되지만 이 논문에서 다룬 모델들을 도심 강우유출수 침투시설에서 발생하는 폐색을 추정하기 위한 효과적인 해석방법으로 제안할 수 있었다.

Keywords

Acknowledgement

Supported by : 공주대학교

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