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Journal of the Korean Society of Hazard Mitigation 2014;14(4):361-368.
Published online August 31, 2014.
Evaluation of Various Design Configurations of a Tree Box Filter Treating Urban Runoff using SWMM
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Evaluation of Various Design Configurations of a Tree Box Filter Treating Urban Runoff using SWMM
Jevelyn Ann S. Tobio, Marla C. Maniquiz-Redillas, Lee Hyung Kim
Abstract
In this research, the physical characteristics (e.g. surface area and storage volume) of an existing tree box filter treating urban runoff were adjusted using stormwater management model (SWMM) to determine the most suitable design configuration and installation (e.g. centralized, series or parallel). The storage volume (SV) and surface area (SA) of the facility was increased or decreased by an increment of 25% (original value is 0.45). These simulations would predict the influence of larger or smaller SV or SA with respect to the facility performance. The hydrologic, hydraulic and water quality data used in the modelling were gathered from the 10 storm events monitored from July 2012 to July 2013. The total suspended solids were considered as the main target pollutant and will be correlated with the common heavy metal constituents. Both parallel and series distributed system has improved the treatment performance by at least of 30% on both volume and particulate removal. However, the mentioned configurations would require additional maintenance and operation costs. Thus, the modelled centralized system would provide better volume and pollutant reduction than a distributed system.
Key Words: Design configuration; road runoff; SWMM; tree box filter
요지
나무여과상자는 물순환이 고려되는 가로수의 일종으로 유출저감을 통해 비점오염물질을 저감하는 저영향개발기술 중의 하나이다. 본 연구에서는 최적 나무여과장자 구성(집중, 병렬, 직렬) 및 설계를 위하여 물리적 특성인 유역면적과 나무여과상자의 저류부피를 고려하여 SWMM을 이용하고자 한다. 본 연구는 나무여과상자의 저류부피와 표면적을 25% 간격으로 증감하면서 진행되었다. SWMM모의를 위한 수리수문학적 자료 및 수질자료는 2012년 7월에서 2013년 7월까지 수행된 총 10회의 모니터링 결과를 이용하였다. 주요 관리대상 오염물질의 항목으로는 도로에서 많이 발생하면서 중금속과 상관성이 높은 TSS를 기준으로 하였다. 모의 결과 집중시스템으로 조성된 나무여과상자가 유출저감 및 오염물질 저감이 높은 것으로 나타났다.
핵심용어: 나무여과상자; 설계 형식; 도로강우유출수


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