Green plantations influence on wind transformation and car emissions dispersion in city streets

Abstract

As the result of the car emissions dispersion physical modeling, the fields of exhaust gas concentrations along the streets' cross-section were obtained. In the "carriage-shelterbelt-building" system, if the belt height is about half the height of the building, the most effective dilution of pollutants along the building façades and at the pedestrian ways is observed; as the belt height approximates to the height of the buildings, the air in the yards of the buildings is still cleaner because of a longer way the pollutants have to travel, but then they accumulate within the street space.