ERIC Number: ED085213
Record Type: Non-Journal
Publication Date: 1972-Sep
Reference Count: N/A
User's Manual for the APRAC-1A Urban Diffusion Model Computer Program.
Mancuso, R. L.; And Others
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: extra-urban diffusion, mainly from sources in upwind cities; intra-urban 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/JR)
Descriptors: Air Pollution, Computer Programs, Environment, Environmental Education, Guides, Instructional Materials, Models, Pollution, Simulation
National Technical Information Service, Springfield, Virginia 22151 (PB 213 091, PC-$3.00 MF-$0.95)
Publication Type: N/A
Education Level: N/A
Sponsor: Environmental Protection Agency, Research Triangle Park, NC. Div. of Meteorology.
Authoring Institution: Stanford Research Inst., Menlo Park, CA.