[extra Quality] | Aermod Free

| Tool | Type | Features | |------|------|----------| | (EPA) | Free GUI | Basic file management, run control | | R-AERMOD (CRAN package) | Open source | Scripted modeling in R, statistical analysis | | PyAERMOD (Python) | Open source | Programmatic control, batch runs | | iSMART (EPA) | Free web-based | GIS integration, limited to certain uses |

| Aspect | Free Implementation | Commercial GUI | |--------|---------------------|----------------| | | Steep (manual file editing) | Shallow (interactive forms) | | Error checking | Manual (trial and error) | Automatic validation | | GIS integration | Manual (AERMAP + external GIS) | Built-in mapping | | Terrain processing | Requires separate DEM handling | Automated | | Reporting | Custom scripting needed | One-click reports | | Support | Community forums, EPA manual | Vendor support | aermod free

| Component | Purpose | Free Source | |-----------|---------|--------------| | | Main dispersion model | EPA Support Center for Regulatory Atmospheric Modeling (SCRAM) | | AERMET | Meteorological data preprocessor | EPA SCRAM | | AERMAP | Terrain data preprocessor (uses USGS DEMs) | EPA SCRAM | | BPIPPRM | Building downwash (GEP stack height) | EPA SCRAM | | AERPLOT / AERSURFACE | Post-processing and surface characteristics | EPA SCRAM | | Tool | Type | Features | |------|------|----------|