Abstract:
This article provides an original method for simulating the spread of hazardous
emissions in the atmospheric surface layer in the event of emergencies
The modeling process implies the development of a mathematical tool
based on the partial differential equation (PDE) of turbulent diffusion. It is
also based on a steady-state equation for determining the contaminant
dispersion during an emergency with regard to the elapsed dispersion time,
volumetric nature of the contamination source, wind speed. The model
allows studying the changes in air composition that have occurred under
various meteorological (wind speed and direction, temperature, fogs, precipitation,
dust winds) and anthropogenous factors. An attempt was made
to calculate the probable contamination area around the arbitrary system of
sources with high contaminant concentration under unfavorable weather
conditions. The original method for calculating the movement and dispersion
of emissions allows forecasting the contaminant concentration level in
the two-meter layer above the ground and the vertical concentration distribution
with regard to the landscape, identified according to the meteorological
data. Our model can be easily scaled on any territory; the entire line
of complex landscape features was taken into account by introducing a
model of weather statistics for the research region.
