This article presents a study of the dependence of the deflation of fine grain dust on the air flow rate, as well as other factors affecting it. This study is important for the summary calculation of the dispersion of emissions of harmful substances from unorganized sources of enterprises into the atmospheric urban air, as well as for the selection of dust suppression measures and a better understanding of the processes of dust propagation.

Keywords: grain dust, dispersed composition, aerodynamic characteristics, specific deflation, dust propagation, atmospheric air

The article deals with the distribution of air flow velocities for cities of compact configuration on the example of the city of Stavropol. The verification of the implementation of Weibull's law for different wind flow velocities in its various directions has been carried out.

Keywords: wind flow direction and velocity, atmospheric air, distribution law, Weibull's law, mixed Gaussian distribution, change in air flow velocities, time of day, compact city