Green vegetation to remove contaminants in surface runoff from an urban area, Xuzhou, China

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Huang, S.H.^1 ; Liu, Y.^1

School of Environmental Engineering, Xuzhou Institute of Technology, Xuzhou

221000, China^1

关键词: Cinnamomum camphora;    Cynodon dactylon;    Evergreen trees;    Nandina domestica;    Plant communities;    Surface runoffs;    Urban green spaces;    Urban water resources;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012086/pdf
DOI  :  10.1088/1755-1315/191/1/012086

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Effects of different Greenbelt Plant configurations on pollutants from Urban Surface runoff varies. A study on the surface runoff samples of five different plant communities in the same green space between Fuchun Road and Shundihe River in Xuzhou City in 2017 due to 12 rainfall events. The results showed that: the content of Pb of Osmanthus fragrans + Crataegus pinnatifida + Nandina domestica community was 0.263 mg.L-1 in summer(months of 4-6 ), and it was lower than that in autumn (months of 7-9 ) (0.333 mg.L-1), spring(months of 1-3 ) (0.444 mg.L-1) and winter (months of 10-12) (0.448 mg.L-1). Under the condition of less rainfall in winter and spring with longer rainfall interval, the pollutant content of surface runoff is higher in five plant communities studied than that in summer with shorter rainfall intervals. The order of average content of Zn in surface runoff in 1 year was as follows: Koelreuteria integrifoliola + Forsythia suspensa + Cynodon dactylon community (0.194 mg.L-1) > Cedrus deodara + F. suspensa + C. dactylon community (0.178mg.L-1) > O. fragrans + C. pinnatifida + N. domestica community (0.166 mg.L-1)> Cinnamomum camphora + Photinia serrulata community (0.149 mg.L-1) > C. camphora + N. domestica + C. dactylon community (0.128 mg.L-1). The average contents of COD, Cu, Pb, TSS, TP, TN and TOC were in the same order in the five communities studied. Therefore, in urban green space plant design, the plant community of evergreen tree and shrub such as C. camphora + N. domestica + C. dactylon community should be allocated as far as possible in order to purify the urban water resources environment.