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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 l.jpg

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 l.jpg

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


An introduction to aermod l.jpg

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


Aermet environment l.jpg

AERMET environment


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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)


Aermet hourly surface data l.jpg

AERMET (Hourly surface data)


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Input hourly surface data


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Quality assessment feature

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


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AERMET (Upper air data)


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Input upper air data

How does it look after clicking preview button?

  • http://www.webmet.com/MetGuide/TD6200.html


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Quality assessment for upper data

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


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Application site, sectors and surface parameters

Site of model (application site)


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Application site, sectors and surface parameters


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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.


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Running the AERMET/Outputs

  • Output files

    • Surface file, *.SFC

    • Profile file, *.PFL

    • Wind rose


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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


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Defining initial parameters

  • UTM (Universal Transverse Mercator) Zones

  • http://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system


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Defining initial parameters

  • Site geometry


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AERMOD environment


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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


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Importing stacks and building

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


Defining building l.jpg

Defining building

  • Drawing tools


Defining stacks l.jpg

Defining stacks

  • Zooming to the extents of interest


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Defining stacks

  • Drawing tools


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3-D Visualization

  • Export → Google Earth


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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


Control pathway l.jpg

Control pathway

Dispersion options


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Control pathway

Pollutant/Averaging


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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.


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Control pathway

Terrain options


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Source pathway

Source summary


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Source pathway

Building downwash

  • Will be calculated later on by the software


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Receptor pathway

Receptor summary


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Receptor pathway

Grids

or


Meteorology pathway l.jpg

Meteorology pathway

Met input data


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Meteorology pathway

Data period


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Meteorology pathway

Wind speed categories


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Output pathway

Tabular outputs


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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)


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Terrain, (AERMAP processor)

  • Determining the extensions in DEM


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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


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AERMAP output


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Running BPIP

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


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Running BPIP

  • Run → BPIP


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Running AERMOD


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Final output


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Thank you for your attention.


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