title: Nitrogen and phosphorus associating with different size suspended solids in roof and road runoff in Beijing, China.
abstract: Roofs and roads, accounting for a large portion of the urban impervious land surface, have contributed significantly to urban nonpoint pollution. In this study, in Beijing, China, roof and road runoff are sampled to measure the suspended solids (SS), nitrogen (N), and phosphorus (P) contained in particles with different sizes. The SS content in the road runoff (151.59 mg/L) was sevenfold that in the roof runoff (21.13 mg/L, p < 0.05). The SS contained more coarse particulates in the roof runoff than in road runoff. The small particulates in the range of 0.45-50 μm consisted of 59 % SS in the roof runoff and 94 % SS in the road runoff. P was mainly attached to particle sizes of 10-50 μm in the roof (73 %) and road (48 %) runoffs, while N was mainly in a dissolved phase state in both runoffs. So, the different associations of N and P raise a challenge in preventing stormwater pollution in urban environments.
authors.affiliation: Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Resources, No. 9, Block 4, Renminnanlu Road, P.O. Box: 417, Chengdu, 610041, China.|State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box: 2871, Beijing, 100085, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Junliang
authors.initials: J
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box: 2871, Beijing, 100085, China. yfren@rcees.ac.cn.
authors.forename: Yufen
authors.initials: Y
authors.lastname: Ren
authors.affiliation: Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Resources, No. 9, Block 4, Renminnanlu Road, P.O. Box: 417, Chengdu, 610041, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Xuemei
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box: 2871, Beijing, 100085, China.
authors.forename: Xiaoke
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box: 2871, Beijing, 100085, China.
authors.forename: Liding
authors.initials: L
authors.lastname: Chen
authors.affiliation: Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Resources, No. 9, Block 4, Renminnanlu Road, P.O. Box: 417, Chengdu, 610041, China. liugc@imde.ac.cn.
authors.forename: Gangcai
authors.initials: G
authors.lastname: Liu
mesh_terms: D000068476:Beijing; D004784:Environmental Monitoring; D009584:Nitrogen / Q000032:analysis*; D010316:Particle Size; D010758:Phosphorus / Q000032:analysis*; D011891:Rain / Q000737:chemistry; D013535:Suspensions; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D013535:Suspensions; D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen
keywords: Nitrogen; Phosphorus; Road runoff; Roof runoff; Suspended solid