AERMET – the meteorological pre-processor for the AERMOD modeling system – allows users to input their own custom meteorological data via its Onsite Pathway. This produces a highly representative dataset when using observations recorded at the site that will be modeled in AERMOD.
In addition to calculating air concentrations of pollutants, the AERMOD air dispersion model can calculate deposition fluxes from both particulate and gaseous emissions. When these routines are enabled, deposition parameters must be input to the model.
Air dispersion models typically have a variety of source types that can be used to represent sources of emissions. One of the most common source types is the point or stack release. Characterized by a well-defined exhaust point with buoyancy (via a defined exit temperature) and vertical momentum (calculated using the diameter of the release point and exit velocity), the point source is probably the most common source type employed in air dispersion modeling.
When working with Lakes Environmental Software applications, the drawing area affords users a lot of flexibility in how they add and visualize their project components. One way for users to make sense of the objects is to include object labels. These are controlled via the Labels tab on the Tree View.
When conducting an air dispersion modeling analysis, the ability to present high-quality graphical depictions of the output is extremely important. Such images provide context to modeled results, and they provide a valuable tool to modelers in understanding and explaining the model’s calculations.
When conducting an air dispersion modeling analysis with AERMOD, a common question arises as to what limits – if any – exist on where calculations can be performed by the model. Understanding the range of the model’s validity is important in interpreting results.