Title: Modelling the dispersion of motor vehicle exhaust gases, including building effects, and its application to the calculation of NOx concentration in Osaka City

Authors: H. Kono

Addresses: Osaka City Environmental Information Centre, 8-34 Higashi-uemachi, Tennoji-ku, Osaka 543, Japan

Abstract: This paper presents a model for dispersion of NOx from motor vehicles and stationary sources in urban areas. Annual average NOx concentrations from these sources were calculated using the Gaussian plume model. The calculated concentrations were compared with the observed concentrations at 67 air monitoring stations located in Osaka Plain. The effect of mechanical turbulence resulting from buildings is modelled using the vertical dispersion parameter, σz, including surface roughness and initial dispersion spreads given as a function of building height and building-to-land ratio.

Keywords: air pollution; atmospheric dispersion models; urban areas; exhaust gases; nitrogen oxides; NOx emissions; vehicle emissions; Gaussian plume model; Osaka; Japan; building height; building-to-land ratio; environmental pollution; modelling.

DOI: 10.1504/IJEP.1997.028213

International Journal of Environment and Pollution, 1997 Vol.8 No.3/4/5/6, pp.620 - 627

Available online: 15 Sep 2009 *

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