Record Display for the EPA National Library Catalog
RECORD NUMBER: 50 OF 54| Main Title | User's Manual for the APRAC-1A Urban Diffusion Model Computer Program. | |||||||||||
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| Author | Mancus, R. L. ; Ludwi, F. L. ; | |||||||||||
| CORP Author | Stanford Research Inst., Menlo Park, Calif. | |||||||||||
| Year Published | 1972 | |||||||||||
| Report Number | CAPA-3-68(1-69)-CRC; APRAC-CAPA-3-68 ;SRI-8563; 3-4; | |||||||||||
| Stock Number | PB-213 091 | |||||||||||
| Additional Subjects | ( Urban areas ; Air pollution) ; ( Air pollution ; Atmospheric motion) ; ( Highway transportation ; Air pollution) ; ( Computer programs ; Programming manuals) ; Handbooks ; Atmospheric diffusion ; Mathematical models ; Wind(Meteorology) ; Exhaust gases ; Carbon monoxide ; Streets ; Concentration(Composition) ; FORTRAN ; Automobile exhaust ; CDC 6400 computers ; APRAC 1A computer program ; IBM 360/50 computers ; Computerized simulation | |||||||||||
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| Collation | 122p | |||||||||||
| Abstract | The APRAC-1A diffusion model was developed as a versatile and practical model for computing the concentrations of pollutants at any point within a city. The model calculates pollutant contributions from diffusion on various scales, including: extraurban diffusion, mainly from sources in upwind cities; intraurban diffusion from freeway, arterial, and feeder street sources; local diffusion of emissions within a street canyon. The model treats only carbon monoxide (CO), a relatively inert gas in the atmosphere but an important pollutant in terms of health. Motor vehicles are the major source of this gas. (Author) |