A PRACTICAL COMPUTERIZED ATMOSPHERIC POLLUTION DISPERSION MODEL WITH ALTITUDE-DEPENDENT DIFFUSIVITIES: APPLICATION TO CARBON MONOXIDE CONCENTRATION CALCULATION

A practical numerical scheme has been developed for simulating the dispersion of airborne pollutants in the atmosphere. The diffusion model can be used as a primary tool in air-quality control and environment planning management. A systematic perturbation method is introduced into the diffusion equation system which possesses altitude-dependent turbulent diffusion coefficients in obtaining an improved gaussian-type basic dispersion formula. The receptor-oriented urban dispersion model is modified to include the concentration calculation of finite-length and random oriented line sources of variable source height. Hourly averaged concentration distributions of the relatively inert carbon monoxide released by motor vehicles and industrial sources over a typical urban area are calculated for several representative traffic and meteorological conditions. Depending on the height of the inversion layer, urban size, pollution inventory and other relevant meteorological conditions, the accumulative contribution due to the altitude-dependent turbulent diffusion coefficients on the pollutant concentration distribution can be significant. (Author/TRRL)

• Corporate Authors:

  GORDON AND BREACH SCIENCE PUB.

  AMSTERDAM:
  ,    
• Authors:
  • Chou, D C
  • Sun, J Y
• Publication Date: 1981

Media Info

• Features: Figures; References;
• Pagination: p. 91-100
• Serial:
  • International Journal of Environmental Studies
  • Volume: 16
  • Issue Number: 2
  • Publisher: GORDON AND BREACH SCIENCE PUB.

Subject/Index Terms

• TRT Terms: Air pollution; Calculation; Carbon monoxide; Concentration (Chemistry); Diffusion (Optics); Digital computers; Equations; Height; Mathematical models; Meteorology; Simulation; Size; Traffic flow; Urban areas; Weather
• Uncontrolled Terms: Concentration
• Old TRIS Terms: Dispersion; Gaussian plume model
• ITRD Terms: 6464: Calculation; 7391: Carbon monoxide; 1394: Catalytic converter; 7132: Concentration (chem); 6769: Diffusion; 8673: Digital computer; 9014: Dimension; 6489: Height; 6473: Mathematical model; 9103: Simulation; 671: Traffic flow; 313: Urban area; 2545: Weather
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00334935
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Aug 15 1981 12:00AM