The Emissions Modeling System for Hazardous Pollutants (EMS-HAP) is needed to process the emission inputs into the ASPEN model or the ISC3 model. Input data needed are emissions data, meteorological data and census tract data. The mapping module produces a concentration at each census tract. The dispersion module is a Gaussian formulation based on ISCST3 for estimating ambient annual average concentrations at a set of fixed receptors within the vicinity of the emission source. The Assessment System for Population Exposure Nationwide (ASPEN) consists of a dispersion and a mapping module. Output consists of concentration contour plots, concentration at a specified location, and maximum concentration at a given elevation and time.Įxecutable/Test Case/Readme (ZIP) (173 K) ExitĪFTOX is a Gaussian dispersion model that will handle continuous or instantaneous liquid or gas elevated or surface releases from point or area sources. Release scenarios include continuous and instantaneous, area and point, pressurized and unpressurized, and liquid/vapor/two-phased options.įor additional information on the ADMS-3 Modeling System please link to the Cambridge Environmental Research Consultants Website. Air Dispersion Modelling software, free download Free Alternative Models and DocumentationĪir Force Dispersion Assessment Model (ADAM) is a modified box and Gaussian dispersion model which incorporates thermodynamics, chemistry, heat transfer, aerosol loading, and dense gas effects. The models in this section include ADAM, ADMS-3, AFTOX, ASPEN, BLP, CALINE3, CALPUFF, DEGADIS, HGSYSTEM, HOTMAC/RAPTAD, HYROAD, ISC3, ISC-PRIME, OBODM, OZIPR, Panache, PLUVUEII, SCIPUFF, SDM, and SLAB. However, inclusion here does not confer any unique status relative to other alternative models that are being or will be developed in the future. This page lists some known alternative models to the perferred/recommended models listed in the Guideline on Air Quality Models, Appendix W that can be used in regulatory applications with case-by-case justification to the Reviewing Authority (Section 3.2 of Appendix W).
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