Incorporating Meander to Account for the Impact of Low Winds in Area Source Modeling; AERMOD as a Case Study

Venkatram, Akula; Pandey, Gavendra; Arunachalam, Saravanan; United States. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment; University of California, Riverside. Department of Mechanical Engineering; University of North Carolina at Chapel Hill

doi:10.1080/10962247.2024.2410450

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Incorporating Meander to Account for the Impact of Low Winds in Area Source Modeling; AERMOD as a Case Study

2024-10-01
By Venkatram, Akula ; Pandey, Gavendra ; Arunachalam, Saravanan

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English

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Creators:

Venkatram, Akula ; Pandey, Gavendra ; Arunachalam, Saravanan

Venkatram, Akula ; Pandey, Gavendra ; Arunachalam, Saravanan Less -
Corporate Creators:

United States. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment ; University of California, Riverside. Department of Mechanical Engineering ; University of North Carolina at Chapel Hill

United States. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment ; University of California, Riverside. Department of Mechanical Engineering ; University of North Carolina at Chapel Hill Less -
Corporate Contributors:

United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy
Subject/TRT Terms:

[+]

AMS/EPA Regulatory Model (AERMOD) ASCENT Atmospheric Diffusion Atmospheric Dispersion Modeling System (ADMS) Dispersions (Chemistry) Environmental Control Friction Factor Velocity Measurement Wind
Publication/ Report Number:

10962247.2024.2410450
DOI:

https://doi.org/10.1080/10962247.2024.2410450
Resource Type:

Journal Article
Right Statement:

Open Access; https://creativecommons.org/licenses/by/4.0/
Geographical Coverage:

United States
Corporate Publisher:

Taylor & Francis
Abstract:

A variety of sources of pollutant emissions can be represented as area sources. These include manure lagoons, landfills, wastewater treatment ponds, and highways. A group of point sources can also be treated as an area source. The impact of an area source is usually computed by representing the area source as a set of line sources perpendicular to the wind direction. As for point sources, the Gaussian horizontal concentration distribution used to compute the contributions of the line sources is likely to overestimate ground-level concentrations when the wind speed is comparable to the standard deviation of the horizontal velocity fluctuations. A variety of methods are used to mitigate this overestimation under these conditions, referred to as meander. As an example of one these approaches, we examine that of AERMOD, EPA’s regulatory model. AERMOD includes meander in modeling the impact of point and volume sources, but has not yet incorporated it into AERMOD’s area source algorithm. This paper describes an approach to include meander in AERMOD’s area source algorithm and demonstrates its impact on concentrations associated with area sources.
Content Notes:

This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Akula Venkatram, Gavendra Pandey & Saravanan Arunachalam (30

Oct 2024): Incorporating meander to account for the impact of low winds in area source

modeling; AERMOD as a case study, Journal of the Air & Waste Management Association, DOI:

10.1080/10962247.2024.2410450
Format:

PDF
Funding:

13-C-AJFE-UNC-019
Collection(s):

Federal Aviation Administration
Main Document Checksum:

[+]

urn:sha-512:6dd6c5731a57cf15c52127615ca2c633cbc1d20627a2848f217d32b092c1f2bb2b3715ad0e71a59ef5ef596b287c6ef38d6f1dd7e67af7fc6c1843ad4849cd12
Download URL:

https://rosap.ntl.bts.gov/view/dot/79612/dot_79612_DS1.pdf
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Incorporating Meander to Account for the Impact of Low Winds in Area Source Modeling; AERMOD as a Case Study

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