Video encyclopedia

Atmospheric dispersion modeling


Air Dispersion Models


Air Dispersion Modeling - Brian Mitchell


Introduction to AERMOD Air Dispersion Modelling


Atmospheric Dispersion Modeling Example


Gas Dispersion Modeling

Atmospheric dispersion modeling is the mathematical simulation of how air pollutants disperse in the ambient atmosphere. It is performed with computer programs that include algorithms to solve the mathematical equations that govern the pollutant dispersion. The dispersion models are used to estimate the downwind ambient concentration of air pollutants or toxins emitted from sources such as industrial plants, vehicular traffic or accidental chemical releases. They can also be used to predict future concentrations under specific scenarios. Therefore, they are the dominant type of model used in air quality policy making. They are most useful for pollutants that are dispersed over large distances and that may react in the atmosphere. For pollutants that have a very high spatio-temporal variability and for epidemiological studies statistical land-use regression models are also used.
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    • Atmospheric layers 

    • Gaussian air pollutant dispersion equation 

    • Briggs plume rise equations