AirWare   On-line Reference Manual

Release Level 5.3.0 beta
Release Date 2007 06
Revision Level 1.1

Point Source Screening Model

To evaluate a single emission source (industrial point source with an elevated stack), the example demonstrates the interdependency of meteorological and stack parameters and shows estimated concentrations downwind from a stack in 1D or 2D graphs, respectively.

User selected parameter are:

  • Emission rate (g/s of a neutrally bouyant, inert gas)
  • Wind speed (m/s at gropind level, representative of a met stations, 10m)
  • Air temperature (degree C, at ground level)
  • Stability Class (Pasquill)
  • Stack height (m)
  • Stack diameter (m)
  • Exit temperature (degree C)
  • Distance from stack (display parameter for scaling only)
  • 1D/2D switch (display parameter to select display style)
The applet shows groundlevel concentration versus downwind distance from the stack, as well as the plume rise (virtual stack) together with the physical stack height for any combination of wind speed, temperature, and stability class. Please note that there is currently no mechanismSee also: Pasquill Stability Classes.

Two scenarios (current and last, color coded,) can be compared in the 1D case.

The Java applet is started with default meteorological parameters, but inherits the basic emission rate (default substance: NOx) and stack data from the current point source in the inventory.


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