Modelling air quality in street canyons: a review

Sotiris Vardoulakis; Bernard EA Fisher; Koulis Pericleous; Norbert Gonzalez-Flesca; (2003) Modelling air quality in street canyons: a review. Atmospheric environment (Oxford, England, 37 (2). pp. 155-182. ISSN 1352-2310 DOI: 10.1016/s1352-2310(02)00857-9
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High pollution levels have been often observed in urban street canyons due to the increased traffic emissions and reduced natural ventilation. Microscale dispersion models with different levels of complexity may be used to assess urban air quality and support decision-making for pollution control strategies and traffic planning. Mathematical models calculate pollutant concentrations by solving either analytically a simplified set of parametric equations or numerically a set of differential equations that describe in detail wind flow and pollutant dispersion. Street canyon models, which might also include simplified photochemistry and particle deposition–resuspension algorithms, are often nested within larger-scale urban dispersion codes. Reduced-scale physical models in wind tunnels may also be used for investigating atmospheric processes within urban canyons and validating mathematical models.

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