The Pecularities of Fine Particles Dispersion Over the Roadside

Evelina Brannvall, Bronislovas Martinėnas


On the ground of physical model mathematical distribution was written down for determining the pollutant dispersion peculiarities in the freeway. The correlation of Lithuanian and foreign studies of ultrafine particles and transitionmetal measurements data was used for the reasoning of model. It was defined that the deposition rate of fine particles and aerosols, which are transporting metals is the same approx 2 cm/sec in the distance of more than 60 m from the road. It means that ultrafine particles due to the moisture, precipitation, wind and coagulation in the natural geographic environment has about 100 times higher deposition rate, than it should be according to its diameter. Considering the peculiarities of the model applied, pollutant concentration above the ground surface in the mentioned above distance from the road could be decreased by the same means as in the vicinity of the freeway: planting high impervious belts of trees and bushes.


fine particles; distribution; freeway

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