CALINE2: AN IMPROVED MICROSCALE MODEL FOR THE DIFFUSION OF AIR POLLUTANTS FROM A LINE SOURCE

This paper discusses the Gaussian dispersion theory, the mathematical assumptions of CALINE2, presents a sensitivity analysis, and compare the CALINE2 predictive capabilities with observed data. The mathematical assumptions discussed include general Gaussian assumptions (Gaussian dispersion, atmospheric stability classes) and Gaussian line source assumptions (mixing cell concept, dispersion parameter modifications, parallel wind line source equation, oblique wind line source equation, and source height adjustments). Data format assumptions covered here are time interval, and input data requirements. Analysis of sensitivity to source strength, wind speed, wind angle, pavement height and stability class, and the ranking of sensitive parameters are discussed. Verifications are discribed are separated into highway configurations (at-grade, depressed, and fill), wind angles (cross and parallel), and on- and off-highway sites to better determine how each of these situations can be handled by CALINE2. Comments are made on the overall use of CALINE2, CALINE2 simulations, and on costs and availability.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 97-120
  • Monograph Title: Assessing transportation-related air quality impacts
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00139655
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 16 1976 12:00AM