CALPUFF
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CALPUFF is an advanced, integrated Gaussian puff modeling system for the simulation of atmospheric pollution dispersion distributed by the Atmospheric Studies Group at TRC Solutions. [1]
It is maintained by the model developers and distributed by TRC. The model has been adopted by the U.S. Environmental Protection Agency (U.S. EPA) in its Guideline on Air Quality Models [2] as a preferred model for assessing long range transport of pollutants and their impacts on Federal Class I areas and on a case-by-case basis for certain near-field applications involving complex meteorological conditions.
The integrated modeling system consists of three main components and a set of preprocessing and postprocessing programs. The main components of the modeling system are CALMET (a diagnostic 3-dimensional meteorological model), CALPUFF (an air quality dispersion model), and CALPOST (a postprocessing package). Each of these programs has a graphical user interface (GUI). In addition to these components, there are numerous other processors that may be used to prepare geophysical (land use and terrain) data in many standard formats, meteorological data (surface, upper air, precipitation, and buoy data), and interfaces to other models such as the Penn State/NCAR Mesoscale Model (MM5), the National Centers for Environmental Prediction (NCEP) Eta model and the RAMS meteorological model.
The CALPUFF model is designed to simulate the dispersion of buoyant, puff or continuous point and area pollution sources as well as the dispersion of buoyant, continuous line sources. The model also includes algorithms for handling the effect of downwash by nearby buildings in the path of the pollution plumes.[3]
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[edit] History
The CALPUFF model was originally developed by the Sigma Research Company (SRC) in the late 1980's under contract with the California Air Resources Board (CARB)[3] and it was first issued in about 1990.[4]
The Sigma Research Company subsequently became part of the Earth Tech Company. After the US EPA designated CALPUFF as a preferred model in their Guideline on Air Quality Models, the Earth Tech company, under contract with the EPA, became the designated distributor of the model.
In April of 2006, ownership of the model switched from the Earth Tech Company to the TRC Solutions Company, who are currently (August 2006) the US EPA's contractor for maintaining and distributing the model. [1]
[edit] References
- ^ a b CALPUFF Status and Update
- ^ Appendix W of 40 CFR Part 51
- ^ a b General and Specific Characteristics of the model
- ^ Model Formulation and Users Guide for the CALPUFF model, May 1990
[edit] See also
[edit] Air pollution dispersion models
[edit] Others
- Atmospheric dispersion modeling
- Atmospheric Studies Group
- Compilation of atmospheric dispersion models
[edit] Further reading
For those who are unfamiliar with air pollution dispersion modelling and would like to learn more about the subject, it is suggested that either one of the following books be read:
- Turner, D.B. (1994). Workbook of atmospheric dispersion estimates: an introduction to dispersion modeling, 2nd Edition, CRC Press. ISBN 156670023X. www.crcpress.com
- Beychok, M.R. (2005). Fundamentals Of Stack Gas Dispersion, 4th Edition, self-published. ISBN 0-9644588-0-2. www.air-dispersion.com
