Air Pollution Dispersion

• Air pollution dispersion is often studied with simple models called box models.  How is the box defined for the Los Angles area????
• Map of the LA Basin  
• Here is a 3D map of the LA Basin
• The ventilation factor gives us a way of relating the pollution concentration to the parameters that control dispersion of the pollution in the local environment.
• Basically, increasing either the mixing height or the wind speed increases the effective volume in which pollutants are allowed to mix.
• The larger the volume, the lower the pollution concentration