Plume Characteristics - Aerosol&amp Particulate 11...

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Unformatted text preview: 9/13/11 Aerosol & Particulate 9/13/11 11 Dispersion from Point Sources Pollutants emitted in plume form www.epa.gov/.../muncpl/landfill/ Why does plume expand downwind? What are the factors that influence the history of plume? Impact on air quality depends on dispersion, which depends on the height of plume Aerosol & Particulate Research Lab 9/13/11 Aerosol & Particulate 9/13/11 22 Plume rise affects transport Effects maximum ground level concentrations (MGLCs) Effects distance of MGLCs Under what conditions can we have a higher Effective Stack Height? www.atmos.ucla.edu/.../ chimneyplumes /Note03.html Aerosol & Particulate Research Lab 9/13/11 Aerosol & Particulate 9/13/11 Aerosol & Particulate 33 Stack Plume: Looping Q: Is it at stable or unstable condition? High or low wind speed? Does it happen during the day or night? Is it good for dispersing pollutants? http://www.med.usf.edu/~npoor/3 Strong turbulence http://www.uwm.edu/~kahl/CoVis/Plume/stable.gif 9/13/11 Aerosol & Particulate 9/13/11 Aerosol & Particulate 44 9/13/11 Aerosol & Particulate 9/13/11 Aerosol & Particulate 55 Strong wind, no turbulence Stack Plume: Coning What is the stability class? Good vertical mixing?...
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