DISPERSION21

Features and Capabilities

• Source types: Multiple point, area, and volume sources as well as street canyons.
• Source releases: Surface, near surface and elevated sources.
• Source locations: Urban or rural locations.
• Plume types: Continuous or intermittent buoyant plumes
• Plume dispersion treatment: Gaussian model treatment using Green's functions and includes multiple reflections.
• Terrain types: Simple terrain with no more than 10 degree slopes.
• Building effects: Building downwash algorithms are included.
• Meteorological data: The model includes a preprocessor to produce the meteorological parameters needed to characterize the atmospheric turbulence as well as to produce wind speed and direction profiles.
• The street canyon module includes some atmospheric chemistry for photochemical reactions.