作者: Jarrett Okita , Cara Poor , Jessica M. Kleiss , Ted Eckmann
DOI: 10.3992/1943-4618.13.2.42
关键词: Water content 、 Surface runoff 、 Nitrate 、 Water retention 、 Water quality 、 Green roof 、 Hydrology 、 Environmental science 、 Roof 、 Stormwater
摘要: Abstract Green roofs have become a common method to increase water retention on-site in urban areas. However, the long-term quality of runoff from green is poorly understood. This study evaluated stormwater regular (non-vegetated) roof, roof installed 6 months previously, and years ago Portland, Oregon. Samples were taken during every rain event for 10 months, analyzed total phosphorus (TP), phosphate (PO3-4), nitrogen (TN), nitrate (NO-3), ammonia (NH3), copper (Cu), zinc (Zn). Runoff had higher concentrations TP PO3-4 lower Zn compared roof. Average 6-year old 6-month 6.3 14.6 times higher, respectively, than average 13.5 26.6 compare...