Pollutant dispersion at the structural axes in Curitiba (PR), Brazil

The increase in the number of vehicles causes deterioration of air quality and decline of population health and well-being. The urban grid of buildings influences air flow, hampering the dispersion of vehicular emissions. The present study aims to assess the influence of land use parameters defined by local legislation, at the Structural Axes in Curitiba (PR), which are characterized by strong stimulus both to high urban density and vehicular traffic. Variations in building setback front line and height were considered, specifically on Avenida Sete de Setembro, in order to investigate their influence on pollutant concentration. The conclusion includes suggestions for modifications in the current city by-laws of land use, recommending that building height be reduced on the side opposite to prevailing winds, and increasing, in yet not consolidated stretches, the frontal setback of mezzanines.

urban planning; land use legislation; air quality; vehicular emissions; canyon street