University of Salford, Manchester, UK.
George Washington University, Washington, DC, USA.
Sci Total Environ. 2020 Apr 1;711:134649. doi: 10.1016/j.scitotenv.2019.134649. Epub 2019 Nov 25.
This paper studies the impact of different green barriers on the dispersion of air pollution in a neighbourhood. The study was performed with reference to air quality conditions in Manchester, UK. Manchester experiences a high level of NO. Measured results showed that the average annual concentration level in 2018 was very close to the limit defined by European Union legislation. Maximum and minimum NO concentrations occurred during the winter and summer, respectively. Simulations of the dispersion of air pollution in a hypothetical neighbourhood showed that NO level was decreased by the increase of air temperature during the simulated day. In four perturbation scenarios, hedges and trees with different heights were added to the neighbourhood as green barriers. Hedges increased the pollution level near the street at the pedestrian level as a result of the reduced wind speed. The simulations demonstrated that using the trees facilitated the dispersion of pollution.
本论文研究了不同绿色壁垒对邻里空气污染扩散的影响。该研究以英国曼彻斯特的空气质量状况为参考。曼彻斯特的 NO 水平较高。测量结果表明，2018 年的平均年浓度水平非常接近欧盟法规规定的限值。冬季和夏季分别出现了最大和最小的 NO 浓度。在假想邻里的空气污染扩散模拟中，模拟日的空气温度升高会降低 NO 水平。在四个扰动量纲情景中，将不同高度的树篱和树木作为绿色壁垒添加到邻里中。由于风速降低，树篱增加了行人高度处街道附近的污染水平。模拟表明，使用树木有利于污染的扩散。
