DOI: 10.1016/j.atmosenv.2015.10.009
Scopus记录号: 2-s2.0-84944741648
论文题名: Evaluation of the surface roughness effect on suspended particle deposition near unpaved roads
作者: Zhu D ; , Gillies J ; A ; , Etyemezian V ; , Nikolich G ; , Shaw W ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 541
结束页码: 551
语种: 英语
英文关键词: Atmospheric deposition
; Fugitive dust
; Near-source deposition
; PM10
; Road dust
Scopus关键词: Crashworthiness
; Deposition
; Dust
; Meteorological problems
; Particle size
; Particle size analysis
; Particles (particulate matter)
; Transportation
; Wind
; Atmospheric depositions
; Fugitive dust
; Near sources
; PM10
; Road dusts
; Surface roughness
; atmospheric deposition
; depositional environment
; dust
; friction
; grass
; nonpoint source pollution
; particle size
; road
; surface roughness
; suspended particulate matter
; wind direction
; wind velocity
; Article
; atmospheric deposition
; atmospheric dispersion
; atmospheric transport
; dust
; friction
; grass
; particle size
; priority journal
; surface property
; suspended particulate matter
; vegetation
; velocity
; wind
; Kansas
; Nevada
; United States
; Washington [United States]
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: The downwind transport and deposition of suspended dust raised by a vehicle driving on unpaved roads was studied for four differently vegetated surfaces in the USA states of Kansas and Washington, and one barren surface in Nevada. A 10 m high tower adjacent to the source (≈10 m downwind) and an array of multi-channel optical particle counters at three positions downwind of the source measured the flux of particles and the particle size distribution in the advecting dust plumes in the horizontal and vertical directions. Aerodynamic parameters such as friction velocity (u*) and surface roughness length (z0) were calculated from wind speed measurements made on the tower. Particle number concentration, PM10 mass exhibited an exponential decay along the direction of transport. Coarse particles accounted for ≈95% of the PM10 mass, at least to a downwind distance of 200 m from the source. PM10 removed by deposition was found to increase with increasing particle size and increasing surface roughness under similar moderate wind speed conditions. The surface of dense, long grass (1.2 m high and complete surface cover) had the greatest reduction of PM10 among the five surfaces tested due to deposition induced by turbulence effects created by the rougher surface and by enhanced particle impaction/interception effects to the grass blades. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81440
Appears in Collections: 气候变化事实与影响
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作者单位: Desert Research Institute, 2215 Raggio Pkwy, Reno, NV, United States; Desert Research Institute, 755 E. Flamingo Road, Las Vegas, NV, United States; Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA, United States
Recommended Citation:
Zhu D,, Gillies J,A,et al. Evaluation of the surface roughness effect on suspended particle deposition near unpaved roads[J]. Atmospheric Environment,2015-01-01,122