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DOI | 10.1016/j.atmosenv.2017.02.001 |
Reduction of air pollution levels downwind of a road with an upwind noise barrier | |
Ahangar, Faraz Enayati1; Heist, David2; Perry, Steven2; Venkatram, Akula1 | |
发表日期 | 2017-04-01 |
ISSN | 1352-2310 |
卷号 | 155页码:1-10 |
英文摘要 | We propose a dispersion model to estimate the impact of a solid noise barrier upwind of a highway on air pollution concentrations downwind of the road. The model, based on data from wind tunnel experiments conducted by Heist et al. (2009), assumes that the upwind barrier has two main effects: 1) it creates a recirculation zone behind the barrier that sweeps the emissions from the highway back towards the wall, and 2) it enhances vertical dispersion and initial mixing. By combining the upwind barrier model with the mixed wake model for a downwind barrier described in Schulte et al. (2014), we are able to model dispersion of emissions from a highway with noise barriers on both sides. The model provides a good description of measurements made in the wind tunnel. The presence of an upwind barrier causes reductions in concentrations relative to those measured downwind of a road with no barriers. The reduction can be as large as that caused by a downwind barrier if the recirculation zone covers the width of the highway. Barriers on both sides of the highway result in larger reductions downwind of the barriers than those caused by a single barrier either upwind or downwind. As expected, barrier effects are small beyond 10 barrier heights downwind of the highway. We also propose a tentative model to estimate on-road concentrations within the recirculation zone induced by the upwind barrier. (C) 2017 Elsevier Ltd. All rights reserved. |
英文关键词 | Dispersion modeling;Noise barrier;Near-road concentration;Air pollution;Recirculation zone |
语种 | 英语 |
WOS记录号 | WOS:000397375300001 |
来源期刊 | ATMOSPHERIC ENVIRONMENT
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来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/58320 |
作者单位 | 1.Univ Calif Riverside, Riverside, CA 92521 USA; 2.US EPA, Off Res & Dev, Res Triangle Pk, NC 27711 USA |
推荐引用方式 GB/T 7714 | Ahangar, Faraz Enayati,Heist, David,Perry, Steven,et al. Reduction of air pollution levels downwind of a road with an upwind noise barrier[J]. 美国环保署,2017,155:1-10. |
APA | Ahangar, Faraz Enayati,Heist, David,Perry, Steven,&Venkatram, Akula.(2017).Reduction of air pollution levels downwind of a road with an upwind noise barrier.ATMOSPHERIC ENVIRONMENT,155,1-10. |
MLA | Ahangar, Faraz Enayati,et al."Reduction of air pollution levels downwind of a road with an upwind noise barrier".ATMOSPHERIC ENVIRONMENT 155(2017):1-10. |
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