| 福州市行道树对交通污染物扩散的影响 |
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| 引用本文： | 孙志伟,郄光发,王成,潘辉,张晓萍.福州市行道树对交通污染物扩散的影响[J].城市环境与城市生态,2009(3). |
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| 作者姓名： | 孙志伟 郄光发 王成 潘辉 张晓萍 |
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| 作者单位： | 北京林业大学林学院;中国林业科学研究院林业研究所;福建省林业科学研究院;福州市国家森林公园; |
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| 基金项目： | 国家“十一五”科技支撑计划重大项目课题“林业生态建设关键技术研究与示范”(2006BAD03A06,2006BAD03A17) |
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| 摘 要： | 选择福州市中心城区3种典型的行道树结构作为研究对象,以CO为交通污染物的示踪气体,分别对绿化带两侧,即道路中央和人行道上CO浓度的时空变化进行了测定,分析了道路中央CO浓度与人行道上CO浓度的差值ΔC。研究结果表明:不同结构的行道树对交通污染物扩散有显著影响。主干道低覆盖度结构,最有利于交通污染物扩散;主干道高覆盖度结构和支路结构,则不利于交通污染物的扩散,使大量污染物涌入人行道,对行人健康构成危害。交通污染物的扩散效果取决于树冠结构,通过对各道路树冠结构的研究发现,疏透度与覆盖度均较小时,扩散效果最好;疏透度较大、覆盖度也较大时,扩散效果最差。
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| 关 键 词： | 交通污染物 扩散 行道树 覆盖度 疏透度 |
Influence of Urban Roadside Trees on Vehicular Pollutant Diffusion in Fuzhou |
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| SUN Zhi-wei,QIE Guang-fa,WANG Cheng,PAN Hui,ZHANG Xiao-ping.Influence of Urban Roadside Trees on Vehicular Pollutant Diffusion in Fuzhou[J].Urban Environment & Urban Ecology,2009(3). |
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| Authors: | SUN Zhi-wei QIE Guang-fa WANG Cheng PAN Hui ZHANG Xiao-ping |
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| Institution: | 1.Forestry College of Beijing Forestry University;Beijing 100083;China;2.Research Institute of Forestry;Chinese Academy of Forestry;Beijing 100091;3.Fujian Academy of Forestry;Fuzhou 350012;4.Fuzhou National Forest Park;China |
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| Abstract: | Three kinds of typical roadside trees were selected as samples in the center of Fuzhou.CO concentration was separately recorded in the street and the sidewalk covered with trees by using CO as a vehicular pollutant tracer.The variation of CO concentration between streets and sidewalks was analyzed at different height.The results showed that different structure of roadside trees had notable effect to vehicular pollutant diffusion.The most beneficial to vehicular pollutant diffusion was the road with lower ca... |
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| Keywords: | vehicular pollutant diffusion roadside tree canopy density shelterbelt porosity |
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