Point Source Model
Purpose
The Point Source Model provides the user with a system that can be used
to prepare stationary source, criteria emissions estimates for speciation
(lumped-model or discrete speciation) and reformatting for input to an
air quality model. As currently formulated, the Point Source Model does
not compute emissions estimates from fundamental emissions data. The Point
Source Model reduces annual or daily point source emissions estimates to
hourly gridded point source emissions estimates.
Main Input
The Point Source Model starts from a foundation emissions estimates data
base, updates the foundation emissions estimates with day-specific emissions
estimates, modifies the resulting emissions estimates to account for spatial
allocation in the emissions modeling grid structure, and temporally resolves
the criteria emissions estimates.
Most of the Point Source Model is written in the SAS®
programming language. The spatial allocation component of the Point Source
Model is written in the ARCTM Macro Language
(AMLTM). The primary inputs to the Point
Source Model are the foundation emissions estimates and day-specific emissions
estimates. The primary output of the Point Source Model is the spatially
allocated, temporally resolved, criteria emissions estimates.
Model Flow Chart
Point Source Model Flow Chart is a figure which
shows the execution order of each processor and a description of each processor
that is contained in the Point Source Model. Each area separated
by dotted line represents one specific processing module and the name of
each module is shown at the alternative text area down on the bottom of
the page. Simply click the area, and it will go to this processing
module page which includes a detailed desciption of each data set and processor.
Users should print this flow chart in Landscape for the purpose
of their own reference.