DOI: 10.1016/j.atmosenv.2014.08.026
Scopus记录号: 2-s2.0-84906217440
论文题名: Effects of solid barriers on dispersion of roadway emissions
作者: Schulte N ; , Snyder M ; , Isakov V ; , Heist D ; , Venkatram A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 97 起始页码: 286
结束页码: 295
语种: 英语
英文关键词: Air quality
; Barrier
; Dispersion modeling
; Line source
; Roadway
Scopus关键词: Atmospherics
; Earth atmosphere
; Adverse health effects
; Barrier
; Dispersion modeling
; Laboratory experiments
; Line sources
; Roadway
; Semi-empirical dispersions
; Unstable conditions
; Roadway emissions
; Air quality
; Air quality
; atmospheric pollution
; concentration (composition)
; dispersion
; environmental assessment
; estimation method
; flow modeling
; health impact
; road transport
; traffic emission
; air quality
; atmospheric plume
; barrier (equipment)
; turbulence
; air pollution
; anemometer
; article
; boundary layer
; dispersion
; exhaust gas
; height
; meteorology
; particulate matter
; performance
; plume dispersion
; priority journal
; solid
; surface property
; velocity
; air pollution
; Article
; noise
; plume
; railway
; simulation
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Several studies have found that exposure to traffic-generated air pollution is associated with several adverse health effects. Field studies, laboratory experiments, and numerical simulations indicate that roadside barriers represent a practical method of mitigating the impact of vehicle emissions because near road concentrations are significantly reduced downwind of a barrier relative to concentrations in the absence of a barrier. These studies also show that the major effects of barriers on concentrations are: 1) the concentration is well mixed over a height roughly proportional to the barrier height, and this effect persists over several barrier heights downwind, 2) the turbulence that spreads the plume vertically is increased downwind of the barrier, 3) the pollutant is lofted above the top of the barrier. This paper ties these effects together using two semi-empirical dispersion models. These models provide good descriptions of concentrations measured in a wind tunnel study and a tracer field study. Their performance is best during neutral and stable conditions. The models overestimate concentrations near the barrier during unstable conditions. We illustrate an application of these models by estimating the effect of barrier height on concentrations during neutral, stable, and unstable conditions. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81094
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Mechanical Engineering, University of California, Riverside, CA 92521, United States; U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory, Atmospheric Modeling and Analysis Division, Research Triangle Park, NC 27711, United States
Recommended Citation:
Schulte N,, Snyder M,, Isakov V,et al. Effects of solid barriers on dispersion of roadway emissions[J]. Atmospheric Environment,2014-01-01,97