改善颗粒物污染的道路绿地植被屏障研究进展

减少道路环境的颗粒物污染对通勤者的健康至关重要。道路绿地在交通排放和邻近区域之间形成屏障,但这种植被屏障是否可以有效消减局部颗粒物污染仍然需要深入研究和探讨。结合现有研究成果,阐述了植被对颗粒物污染的影响途径;分析了街道峡谷和开放道路两种典型城市道路环境中,植被组成及群落结构设计的关键特征对颗粒物分布和扩散的影响;总结了有利于消减颗粒物浓度的植被单株性状和叶片微形态;探讨了影响颗粒物浓度的其他因子的耦合作用;针对不同道路环境提出了有效的植被屏障设计建议,并指出了植被群落设计和叶片微形态方面的研究趋势,以期优化道路植被规划,改善路域空气质量。

Research progress on roadside vegetation barriers for reducing particulate matter pollution

In roadside environment, it is critical to reduce airborne particulate pollution for the commuters'' health. Urban road vegetation would form a barrier between traffic emissions and adjacent areas, but whether roadside vegetation barrier can reduce nearby particulate pollution remains uncertain. Combined with the existing research, the influence mechanism of vegetation on particulate pollution was expounded. The effects of key characteristics of roadside vegetation composition design on particle distribution and diffusion in street canyon and open road environments were discussed respectively. The individual plant traits and leaf morphology that helps to reduce the particle concentration were summarized. The coupling effect of other factors affecting particle concentration was analyzed. Additionally, the recommendations for vegetation barrier design in different road environments are proposed, and the research trends in vegetation community design and leaf morphology are raised. It is hoped that the research results would be used to optimize the roadside vegetation planning and improve the air quality in nearby environment.