What determines the depth and shape of the lesion by accidentally hazardous substances?

The depth of the lesion by accidentally hazardous substances mainly depends on the concentration of the hazardous chemical and wind speed. The presence of wind, having a speed of 6-7 m / s or more, contributes to the dispersal of a cloud of chemically hazardous substances. An increase in the temperature of the soil and air accelerates the evaporation of a hazardous chemical substance and, consequently, increases its concentration over the contaminated area.
Other weather conditions (rain, snow, fog, etc.) also significantly affect the depth of distribution and the concentration of the toxic substance.
The shape of the lesion by accidentally chemically hazardous substance is largely dependent on wind speed. For example, at a wind speed of 0.5 m / s, it usually resembles a circle, from 0.6 to 1.0 m / s – a semicircle, from 1.1 to 2 m / s – a sector with an angle of 90 °, more than 2 m / s – sector with an angle of 45 °.