air quality assessment & management
Reference and User Manual
Line source modelAirWare includes a very high resolution model (spatial resolutions from 5 to 50 meters) to describe near-field concentration gradients (from 500 m to 5 km around the source) for hourly events along roads and traffic arties.
The dispersion model used is based on AERMOD, and uses a computational kernel based on an area source (Gaussian solution with an hourly aggregation period in AERMOD) with a mixing zone approach in and over the street itself with unit emissions. The kernel results are then scaled according to actual traffic frequency, speed, and fleet composition, and distributed along the line sources by a convolution method.
Model ScenariosThe convolution based traffic model is available for
Domain specific runsFor these scenarios, all line segments within the model domain will be used.
Road segment specific runsThe basic model is also linked to the line sources emission inventory for the analysis of individual line sources, one at a time..
The select primarily a road segment from the line source emission data base.
At the level of the line source model (button: Traffic model), available choices include:
The button: details right under the map then leads to a larger map with interactive control of the results display, choice of color/histogram classification, display of sources, and zooming.
AERMOD with embedded convolutionAERMOD models runs also use the high-resolution convolution model for traffic sources;
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