摘要
紧邻城市道路的慢行道通勤人群面临直接暴露于高污染环境的风险,而形似固体屏障的路边货车停靠现象时有发生,又使得慢行道交通污染分布变得难以计算。为此,本文以福建省福州市西三环快速路沿江侧的某路段为研究对象,实地测量收集路侧慢行道的细颗粒物(PM_(2.5))与黑炭(BC)的高分辨率浓度样本,统计解析其在路侧的空间分布差异,并利用实测数据建立基于ENVI-met的数值模型,模拟探究不同遮挡强度下的路边停靠货车对路侧慢行道空气质量的影响。结果发现:(1)PM_(2.5)浓度与监测点至污染源之间的距离成反比,消减效率与绿化带的植被密度和宽度成正比,高峰时段PM_(2.5)浓度高于平峰时段而BC浓度则相反,路边出现停靠货车和绿化带的路段PM_(2.5)消减效率明显提高;(2)路边停靠货车一定程度上可削减路侧慢行道PM_(2.5)浓度,但是过高的空间遮挡强度并不能起到更好的改善作用,甚至会增加路侧慢行道行人的污染暴露量。
Commuters in the slow lane close to urban roads face the risk of direct exposure to high pollution,and the phenomenon of roadside trucks stopping like solid barriers occurs from time to time,which makes the distribution of traffic pollution in the slow lane confusing.Therefore,this paper took a section of West Third Ring Expressway in Fuzhou as the research object,collected the concentration data of PM_(2.5)and BC in the roadside slow lane,and established the numerical model of ENVI-met.The results show that:(1)The concentration of PM_(2.5)is inversely proportional to the distance from the monitoring point to the pollution source,and the reduction efficiency is directly proportional to the vegetation density and width of the green belt.The concentration of PM_(2.5)in the peak period is higher than that in the flat peak period,while the concentration of BC is the opposite.The reduction efficiency of PM_(2.5)in the road sections with parked trucks and green belts is obviously improved.(2)Parking trucks on the roadside can reduce the concentration of PM_(2.5)on the roadside slow lane to a certain extent,but the excessive space shielding intensity can't achieve a better improvement effect,and even increase the pollution exposure of pedestrians on the roadside slow lane.
作者
杨文彬
安兴
林晗宇
王兆斌
陈舒婷
胡喜生
王占永
YANG Wenbin;AN Xing;LIN Hanyu;WANG Zhaobin;CHEN Shuting;HU Xisheng;WANG Zhanyong(School of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou Fujian 350108,China)
出处
《交通节能与环保》
2024年第1期39-46,共8页
Transport Energy Conservation & Environmental Protection
基金
国家自然科学基金资助项目(41701552)
福建省自然科学基金资助项目(2021J01105)。
作者简介
杨文彬(1996-),男,河南开封人,硕士,研究方向为道路与交通环境;通信作者:王占永(1983-),男,河南漯河人,博士,讲师,研究方向为交通污染统计学、基于无人机的空气污染智能监测技术等。
