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Tutorial for AERMOD View, an interface for US-EPA AERMOD Model

Tutorial for AERMOD View, an interface for US-EPA AERMOD Model. Nima A- Mohajer. ENV 6146, Atmospheric Dispersion Modeling February 2010. http://www.weblakes.com/ . Outline. Introduction to AERMOD Installation, AERMOD View environment AERMET Making the model in AERMOD View

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Tutorial for AERMOD View, an interface for US-EPA AERMOD Model

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  1. Tutorial for AERMOD View, an interface for US-EPA AERMOD Model Nima A-Mohajer ENV 6146, Atmospheric Dispersion Modeling February 2010 • http://www.weblakes.com/

  2. Outline • Introduction to AERMOD • Installation, AERMOD View environment • AERMET • Making the model in AERMOD View • AERMOD pathways • AERMAP • Running AERMOD View Goal • Pursuing an example for air dispersion modeling by using the AERMOD short-term model

  3. An introduction to AERMOD • AERMOD • stands for American Meteorological Society/ Environmental Protection Agency Regulatory Model • COMPONENTS • AERMET – a meteorological preprocessor • AERMAP – a terrain data preprocessor • AERMOD – a dispersion model • SUPPORT TOOLS • AER-SURFACE – processes surface characteristics data • AER-SCREEN – provides a screening tool

  4. AERMET environment

  5. Minimum AERMET input data • Hourly surface data • Upper air data • Location of the pertinent site, sectors and surface data • On-site data • Hourly surface data • Cloud cover (Tenth) • Dry bulb temperature (o C) • Relative humidity (%) • Station pressure (mb) • Wind direction (deg) • Wins speed (m/s) • Ceiling height (m) • Precipitation amount (hundredths of inches) • Global horizontal radiation (wh/m2)

  6. AERMET (Hourly surface data)

  7. Input hourly surface data

  8. Quality assessment feature • QA is an optional process helping potential problems in data to be excluded or included.

  9. AERMET (Upper air data)

  10. Input upper air data How does it look after clicking preview button? • http://www.webmet.com/MetGuide/TD6200.html

  11. Quality assessment for upper data • QA is an optional process helping potential problems in data to be excluded or included.

  12. Application site, sectors and surface parameters Site of model (application site)

  13. Application site, sectors and surface parameters

  14. Application site, sectors and surface parameters • Albedo for each land type → reflective power of the surface • Bowen ratio for each land type → portion of transferred energy from the surface to the atmosphere • Surface roughness foe each land type • A combination of different types of land use data may be used for a particular case.

  15. Running the AERMET/Outputs • Output files • Surface file, *.SFC • Profile file, *.PFL • Wind rose

  16. AERMOD View • Assumptions • A factory in a rural area • 2 stacks with a building in between • SO2 as pollutant in flue gas • Assumed value for stacks • Surface file, *.SFC • Profile file, *.PFL

  17. Defining initial parameters • UTM (Universal Transverse Mercator) Zones • http://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system

  18. Defining initial parameters • Site geometry

  19. AERMOD environment

  20. Importing base map • A raster map as an image file (JPEG, TIFF, DXF, …) should be imported • Import → Base maps… • Then, map extents should be geo-referenced

  21. Importing stacks and building • Extents of the building foundation and stacks are imported by a DXF file. Import → base maps…

  22. Defining building • Drawing tools

  23. Defining stacks • Zooming to the extents of interest

  24. Defining stacks • Drawing tools

  25. 3-D Visualization • Export → Google Earth

  26. AERMOD pathways • Control pathway • Source pathway • Receptor pathway • Meteorology pathway • Output pathway • Control pathway • Dispersion options • Pollutant/Averaging • Terrain options • Receptor pathway • Receptor summary • Grids • Meteorological pathway • Met input data • Data period • Wind speed categories • Source pathway • Source summary • Building downwash

  27. Control pathway Dispersion options

  28. Control pathway Pollutant/Averaging

  29. Control pathway Pollutant/Averaging • If the land use types including industrial, commercial and residential uses account for 50% or more of an area within 3 km radius from the source, the site is classified as urban; otherwise, it is classed as rural.

  30. Control pathway Terrain options

  31. Source pathway Source summary

  32. Source pathway Building downwash • Will be calculated later on by the software

  33. Receptor pathway Receptor summary

  34. Receptor pathway Grids or

  35. Meteorology pathway Met input data

  36. Meteorology pathway Data period

  37. Meteorology pathway Wind speed categories

  38. Output pathway Tabular outputs

  39. Terrain, (AERMAP processor) • Terrain or AERMAP feature of AERMOD, is used for processing the elevated terrains. It creates a digital terrain file that covers modeling domain. • Digital Elevated Maps (DEM)

  40. Terrain, (AERMAP processor) • Determining the extensions in DEM

  41. Terrain, (AERMAP processor) • Import elevations/hill heights Reviewing Receptor pathway, Source pathway, and Building Inputs, shows the imported elevations and hill heights generated by AERMAP

  42. AERMAP output

  43. Running BPIP • BPIP is an acronym for Building Input Profile Program and it is for obtaining building downwash calculation results.

  44. Running BPIP • Run → BPIP

  45. Running AERMOD

  46. Final output

  47. Thank you for your attention.

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