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Franz Kevin F. Geronimo,홍정선,김이형 한국물환경학회 2017 한국물환경학회지 Vol.33 No.6
Tree box filters, an example of bioretention systems, were compacted and versatile urban stormwater low impact development technique which allowed volume and water quality treatment performance to be adjusted based on the hydrologic, runoff quality and catchment characteristics. In this study, the overall performance of a 6 year-old tree box filter receiving parking lot stormwater runoff was evaluated. Hydrologic and hydraulic factors affecting the treatment performance of the tree box filter were also identified and investigated. Based on the results, the increase in rainfall depth caused decrease in hydrologic and hydraulic performance of the tree box filter including volume, average flow, and peak flow reduction (r = -0.53 to –0.59; p <0.01). TSS, organics, nutrients, and total and soluble heavy metals constituents were significantly reduced by the system through media filtration, adsorption, infiltration, and evapotranspiration mechanisms employed in the tree box filter (p <0.001). This significant pollutant reduction by the tree box filter was also found to have been caused by hydrologic and hydraulic factors including volume, average flow, peak flow, hydraulic retention time (HRT) and runoff duration. These findings were especially useful in applying similar tree box filter which may be designed by considering tree box filter surface area to catchment area of less than 1%.
Geronimo, Franz Kevin F.,Maniquiz-Redillas, Marla C.,Kim, Lee-Hyung Balaban Publishers 2013 Desalination and water treatment Vol.51 No.19
<P> Stormwater best management practices (BMPs) commonly employ only one function that is sometimes insufficient to achieve its necessary efficiency. The method of integrating several functions of BMP technologies and incorporating them in one treatment system is referred to as hybrid BMP. This study developed, investigated, and compared the efficiency of two laboratory-scale hybrid BMP in reducing stormwater pollutants and runoff volume. The laboratory-scale hybrid BMPs developed were composed of treatment tanks arranged in series referred to as infiltration, storage or retention and final tanks that have different media configuration. Based on the results, both hybrid types were effectual in pollutant removal and flow volume reduction since both hybrid types significantly reduced the inflow volume and all pollutants including total suspended solids, chemical oxygen demand and total metals (p < 0.05). Hybrid type A was more advantageous for designs considering greater volume for groundwater recharge, less pollutant discharged to sewer systems and good removal efficiency for shorter hydraulic retention time. Meanwhile, hybrid type B was more appropriate for designs considering greater volume for stormwater reuse and less cost in terms of filter media usage. Depending on the design consideration, either one of the hybrid BMP types may be applicable. </P>
도시지역의 침투 및 비침투 그린인프라시설의 장기간 운영 및 평가
( Franz Kevin F. Geronimo ),( Jungsun Hong ),( Lee-hyung Kim ) 한국물환경학회 2017 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2017 No.-
Green infrastructure (GI) is a multi-beneficial stormwater management approach that connects ecosystem with urban revitalization considering political and socio-economic constraints(Keeley et al., 2013). In this study, a 6 year old infiltration trench(IT), two 6 year old constructed wetlands (HCW1 and HCW2) and a 6 year old tree box filter(TBF) were compared to assess the long term performance of infiltration and non-infiltration GI. Influent and effluent samples were collected from a total of 114 storm events monitored from May 2009 to October 2016 in the four stormwater GI. Hydrologic and hydraulic parameters including rainfall depth, rainfall and runoff duration, rainfall intensity, runoff and discharged volume, antecedent dry day (ADD), and peak flowrates were recorded during storm events. Four GI developed showed efficiency in reducing both stormwater runoff volume and stormwater pollutants. The study concluded that the infiltration mechanism employed in the study affected the significant difference between infiltration and non-infiltration GI performance.