title: A field study to evaluate the impact of different factors on the nutrient pollutant concentrations in green roof runoff.
abstract: The objectives of this study are to investigate the impact of different factors on the nutrient pollutant concentrations in green roof runoff and to provide reference data for the engineering design of dual substrate layer green roofs. The data were collected from eight different trays under three kinds of artificial rains. The results showed that except for total phosphorus, dual substrate layer green roofs behaved as a sink for most of the nutrient pollutants (significant at p < 0.05), and the first-flush effect did not occur during the 27 simulated rain events. The results also revealed that the concentration of these nutrient pollutants in the runoff strongly depended on the features of the nutrient substrates used in the green roof and the depth of the adsorption substrates. Compared with the influence of the substrates, the influence of the plant density and drainage systems was small.
authors.affiliation: Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China E-mail: crystalwinnee@163.com.
authors.forename: Xiaochen
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China E-mail: crystalwinnee@163.com.
authors.forename: Xinhua
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China E-mail: crystalwinnee@163.com.
authors.forename: Chenrui
authors.initials: C
authors.lastname: Peng
authors.affiliation: Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China E-mail: crystalwinnee@163.com.
authors.forename: Xinbo
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China E-mail: crystalwinnee@163.com.
authors.forename: Jianghai
authors.initials: J
authors.lastname: Wang
mesh_terms: D057919:Biological Oxygen Demand Analysis; D002681:China; D003247:Conservation of Natural Resources / Q000379:methods*; D004784:Environmental Monitoring; D005160:Facility Design and Construction; D008962:Models, Theoretical; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D011891:Rain; D031963:Sedum / Q000254:growth & development*; D014507:Urbanization; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen