干旱区生态环境知识资源中心(Arid): Deposition and Resuspension Section

Arid

DOI	10.2172/8593008
报告编号	BNWL-2000(Pt.3)
来源ID	OSTI_ID: 8593008
	Deposition and Resuspension Section
	Slinn, W. G.N.; Horst, T. W.; Sehmel, G. A.; Hodgson, W. H.; Lloyd, F. D.; Orgill, M. M.; Bander, T. J.; Thorp, J. M.; Schwendiman, L. C.; Young, J. A.; Tanner, T. M.; Thomas, C. W.; Wogman, N. A.; Petersen, M. R.; Hadlock, R. K.; Droppo, J. G.; Woodruff, R. K.
英文摘要	Nineteen papers are covered in this section. Significant contributions were made in 1975 in both the theoretical and the more practical experimental measurements of particle deposition and resuspension. Solutions of theoretical deposition-resuspension equations were formulated and nondimensionalized air and ground concentrations were predicted as a function of distance. In other theoretical studies assumptions and analyses regarding surface boundary conditions were investigated and methods presented whereby they can be fitted together within a single theoretical framework. Deposition in vegetation canopies was considered; formulations were developed and conclusions drawn regarding canopy filtration efficiency. Dry deposition of gases was shown to be rate-limited by many processes, and experiments and equipment were designed to measure gradients of SO/sub 2/ and deposition fluxes. A computer model was improved and used to predict downwind concentrations for a generalized area source. A dimensional analysis correlation was formulated from experimental particle deposition velocity data, but was found to show insignificant improvement when compared statistically with an earlier derived correlation. Wind tunnel measurements of deposition velocities to gravel beds and scaled trees showed that particles will penetrate very significantly to underlying surfaces. Initial field experiments measured deposition velocity to sagebrush canopies. Other controlled field studies were initiated for measuring resuspension, including resuspension from truck traffic. Suspension of soil and the size distribution of particles airborne under various air regimes were studied. In the large METROMEX study done near St. Louis, several pollutants were sampled and analyzed as a function of distance. These studies gave insight into the relative inportance of dry deposition and atmospheric dispersion as mechanisms for reducing air concentrations. (auth)
出版年	1976
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES ; AEROSOLS ; AIR POLLUTION ; CHEMICAL EFFLUENTS ; PARTICLE RESUSPENSION ; DUSTS ; METEOROLOGY ; RESEARCH PROGRAMS ; PARTICLES ; DIFFUSION ; RADIOACTIVE AEROSOLS ; SURFACE AIR ; AERODYNAMICS ; BOUNDARY LAYERS ; CARBON MONOXIDE ; CHLORINE COMPOUNDS ; COMPUTER CALCULATIONS ; EARTH CRUST ; EQUATIONS ; FLUORINE COMPOUNDS ; FORESTS ; GASES ; LEAD ; LEAVES ; MATHEMATICAL MODELS ; METHANE ; MISSOURI ; OZONE ; PARTICLE SIZE ; PLUMES ; STORMS ; SULFATES ; SULFUR DIOXIDE ; SURFACES ; TERRESTRIAL ECOSYSTEMS ; URBAN AREAS ; VELOCITY ; WIND ; AIR ; ALKANES ; CARBON COMPOUNDS ; CARBON OXIDES ; CHALCOGENIDES ; COLLOIDS ; CRYOGENIC FLUIDS ; DISASTERS ; DISPERSIONS ; ECOSYSTEMS ; ELEMENTS ; FLUID MECHANICS ; FLUIDS ; HALOGEN COMPOUNDS ; HYDROCARBONS ; LAYERS ; MECHANICS ; METALS ; MIDWEST REGION ; NORTH AMERICA ; ORGANIC COMPOUNDS ; OXIDES ; OXYGEN COMPOUNDS ; POLLUTION ; SIZE ; SOLS ; SULFUR COMPOUNDS ; SULFUR OXIDES ; USA 500100* -- Environment, Atmospheric-- Basic Studies-- (-1989) ; 500200 -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (-1989) ; 510300 -- Environment, Terrestrial-- Radioactive Materials Monitoring & Transport-- (-1989)
URL	http://www.osti.gov/scitech/servlets/purl/8593008
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/261562
推荐引用方式 GB/T 7714	Slinn, W. G.N.,Horst, T. W.,Sehmel, G. A.,et al. Deposition and Resuspension Section,1976.