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DOI | 10.1016/j.atmosenv.2013.05.073 |
Re-formulation of plume spread for near-surface dispersion | |
Venkatram, Akula1; Snyder, Michelle G.2; Heist, David K.2; Perry, Steven G.2; Petersen, William B.3; Isakov, Vlad2 | |
发表日期 | 2013-10-01 |
ISSN | 1352-2310 |
卷号 | 77页码:846-855 |
英文摘要 | Recent concerns about effects of automobile emissions on the health of people living close to roads have motivated an examination of models to estimate dispersion in the surface boundary layer. During the development of a new line source dispersion model, RLINE (Snyder et al., 2013), analysis of data from a tracer field study led to a re-examination of near-surface dispersion resulting in new formulations for horizontal and vertical plume spread presented in this paper. The equations for vertical spread use the solution of the two-dimensional diffusion equation, in which the eddy diffusivity, based on surface layer similarity, is a function of surface micrometeorological variables such as surface friction velocity and Monin-Obukhov length. The horizontal plume spread equations are based on Eckman's (1994) suggestion that plume spread is governed by horizontal turbulent velocity fluctuations and the vertical variation of the wind speed at mean plume height. Concentration estimates based on the proposed plume spread equations compare well with data from both the Prairie Grass experiment (Barad, 1958) as well as the recently conducted Idaho Falls experiment (Finn et al., 2010). One of the major conclusions of this study is that the plume spreads as well as the wind speed used to estimate concentrations in a dispersion model form a set of coupled variables. Published by Elsevier Ltd. |
英文关键词 | Plume spread;Near surface dispersion;Surface releases;Similarity theory;Model performance;Prairie Grass experiment;Idaho Falls experiment;RLINE |
语种 | 英语 |
WOS记录号 | WOS:000324848500088 |
来源期刊 | ATMOSPHERIC ENVIRONMENT |
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/59098 |
作者单位 | 1.Univ Calif Riverside, Riverside, CA 92521 USA; 2.US EPA, Off Res & Dev, Natl Exposure Res Lab, Atmospher Modeling & Anal Div, Res Triangle Pk, NC 27711 USA; 3.William B Petersen Consulting, Res Triangle Pk, NC USA |
推荐引用方式 GB/T 7714 | Venkatram, Akula,Snyder, Michelle G.,Heist, David K.,et al. Re-formulation of plume spread for near-surface dispersion[J]. 美国环保署,2013,77:846-855. |
APA | Venkatram, Akula,Snyder, Michelle G.,Heist, David K.,Perry, Steven G.,Petersen, William B.,&Isakov, Vlad.(2013).Re-formulation of plume spread for near-surface dispersion.ATMOSPHERIC ENVIRONMENT,77,846-855. |
MLA | Venkatram, Akula,et al."Re-formulation of plume spread for near-surface dispersion".ATMOSPHERIC ENVIRONMENT 77(2013):846-855. |
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