Study Of The Dispersion Process Of
Vehicular Emissions At A Specific Site In
Belo Horizonte Using Numerical Simulation
Author(s)
V. Jacomino, F. Tavares, A. Barreto & E. Dutra
Abstract
In this study, the California Line Source for Queuing & Hot Spot Calculations
Refined (CAL3QHCR) model was used to assess the contribution of particulate
matter (PM) from vehicular exhausts to the air quality of a specific site in
downtown Belo Horizonte. Meteorological, traffic, signalization, and vehicular
emissions data were collected and analyzed according to the CAL3QHCR
model’s requirements. Due to the absence of PM emission factors for the Belo
Horizonte region, it was opted to use previously established factors for vehicles
as measured in the São Paulo metropolitan area. Concentration results obtained
through simulations were compared to PM10 and PM2.5 concentration
experimental data, which consisted of samples collected from an air quality
monitoring station located in the micro-region selected for this research. For all
scenarios considered, concentration values predicted by the model were lower
than experimental concentrations. The sensitivity analysis showed that the
vehicular emissions factor influenced simulation results more than other input
parameters. Thus more research in the area would be indispensable for obtaining
specific emission factors for the region without discarding the possibility of
establishing a vehicle inspection program through random sampling in Belo
Horizonte.
Keywords: air quality, vehicle pollution, particulate matter, numerical
simulation.
Keywords
air quality, vehicle pollution, particulate matter, numerical
simulation
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