Field study of the ability of two grassed bioretention cells to reduce storm-water runoff pollution.
作者： Elodie Passeport , William F. Hunt , Daniel E. Line , Ryan A. Smith , Robert A. Brown
DOI: 10.1061/(ASCE)IR.1943-4774.0000006
关键词: Denitrification 、 Fecal coliform 、 Bioretention 、 Phosphorus 、 Hydrology 、 Water quality 、 Environmental science 、 Water pollution 、 Surface runoff 、 Stormwater
摘要: Two grassed bioretention cells including internal storage zones (ISZs) were monitored for 16 months in central North Carolina. Each cell had a surface area of 106 m2 and fill media depths 0.75 1.05 m the north (North) south (South) cells, respectively. Asphalt parking lot inflow outflows analyzed nitrogen phosphorus forms fecal coliform (FC). Outflow volumes peak flows individual storms generally less than those inflow. Overall, except N O2,3 –N , effluent species event mean concentrations (EMCs) loads significantly (α=0.05) lower inflow, load reductions ranged from 47 to 88%. Apart fall winter, during which longer hydraulic contact time seemed be needed, ISZs appeared improve denitrification. Total (TP) OP O4 -P EMCs inlet. Reductions 58% 63% TP 78% 74% ...
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