Impacts of noise barriers on near-road air quality
Impacts of noise barriers on near-road air quality
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DOI：
10.1016/j.atmosenv.2008.05.051
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发表时间：
2008-10-01
影响因子：
5
通讯作者：
Snow, R.
中科院分区：
文献类型：
--
作者：
Baldauf, R.;Thoma, E.;Snow, R.
在世界范围内进行的许多健康研究表明，在大型公路附近生活、工作或上学的人群中，不良健康影响的发生率有所增加。一项研究旨在评估交通排放对一条繁忙高速公路附近空气质量的影响。所研究的高速公路部分包括一段空地和一段与道路相邻的隔音屏障。此外，包含隔音屏障的部分包括屏障附近的植被部分。因此，这项实地研究提供了一个机会来评估没有屏障的道路附近空气质量，只有一个隔音屏障，以及隔音屏障和道路附近的植被。在这些情景下测量的污染物包括一氧化碳（CO）和颗粒物（PM）。测量结果显示隔音屏障对道路附近空气质量的影响。在气象条件下，这种结构的存在通常导致障碍物后面的污染物浓度降低，风从道路方向吹来。在屏障后，CO和PM的浓度通常下降了15%至50%。然而，当屏障后的污染物浓度比没有屏障时更高时，就会出现这种情况。这些结果表明，在某些风力条件下，隔音屏障的存在会导致道路上的污染物浓度升高。此外，研究结果表明，除了屏障外，成熟树木的存在进一步降低了PM数浓度。Elsevier Ltd.出版。
Numerous health studies conducted worldwide suggest an increase in the occurrence of adverse health effects for populations living, working, or going to school near large roadways. A study was designed to assess traffic emission impacts on air quality near a heavily traveled highway. The portion of highway studied included a section of open field and a section with a noise barrier adjacent to the road. In addition, the section containing the noise barrier included a portion with vegetation in the vicinity of the barrier. Thus, this field study provided an opportunity to evaluate near-road air quality with no barriers, with a noise barrier only, and with a noise barrier and vegetation adjacent to the road. Pollutants measured under these scenarios included carbon monoxide (CO) and particulate matter (PM).Measurements showed the effects of a noise barrier on near-road air quality. The presence of this structure often led to pollutant concentration reductions behind the barrier during meteorological conditions with winds directionally from the road. CO and PM number concentrations generally decreased between 15 and 50% behind the barrier. However, conditions occurred when pollutant concentrations were greater behind the barrier than when no barrier was present. These results imply that the presence of a noise barrier can lead to higher pollutant concentrations on the road during certain wind conditions. In addition, the study results suggested that the presence of mature trees in addition to the barrier further lowered PM number concentrations. Published by Elsevier Ltd.