A MICROSCALE DISPERSION MODEL FOR MOTOR-VEHICLE EXHAUST-GAS IN URBAN AREAS - OMG VOLUME SOURCE MODEL

被引：30

作者：

KONO, H ^{[1
]}

ITO, S ^{[1
]}

机构：

[1] UNIV OSAKA PREFECTURE,COLL ENGN,SAKAI,OSAKA 591,JAPAN

来源：

ATMOSPHERIC ENVIRONMENT PART B-URBAN ATMOSPHERE | 1990年 / 24卷 / 02期

关键词：

Dispersion model; micro-scale; motor vehicle; OMG VOLUME-SOURCE model; urban area; volume source;

D O I：

10.1016/0957-1272(90)90029-T

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A micro-scale dispersion model is presented for estimating the concentration of pollutants from motor vehicle exhaust gas within an area extending 200 m from the side of the road in an urban area. The initial mixing of pollutants in a street canyon is modeled as a volume source employing an analytical solution to the Fickian diffusion equation. Parameters for the model were determined based on data from experiments performed at five locations in Osaka. In the experiments, SF6 was released as a tracer gas. The height for wind speed measurements for use as the advection speed of the plume was determined from an analysis of the flux of SF6. The eddy diffusivities in the vertical and lateral directions were derived from statistics of the turbulent velocity fluctuations of the air. The sensitivity analysis of the model revealed that proper characterization of the thickness of the volume source is essential for proper estimation of the concentration of pollutants. © 1990.

引用

页码：243 / 251

页数：9

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