aermod model Articles
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Evaluation of OML and AERMOD
Results from an evaluation of three dispersion models are presented: the currently operational OML model, a new, improved 'Research Version' of OML, and the US AERMOD model. The evaluation is based on the Prairie Grass data set. For these data the OML Research Version appears superior to the other two models. Further, the paper discusses problems and pitfalls of the Prairie Grass data set. The ...
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Sensitivity of the AERMOD air quality model to the selection of land use parameters
AERMOD is a new, advanced plume dispersion model that the U.S. Environmental Protection Agency (EPA) is expected to propose for regulatory use. It is intended to replace ISCST3 for most modeling applications. AERMOD is the result of an effort to incorporate scientific knowledge gained over the last three decades into regulatory plume models. AERMOD requires, as input, three site-specific land use ...
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`Sensitivity of the AERMOD Air Quality Model to the Selection of Land Use Parameters,` prepared for a 1999 air pollution conference in San Francisco, CA
Abstract AERMOD i: a neiv, advanced pl.ir* ."ispersicn rcd*l that "h* U.S. Envircn-nerta Prc:*c::on Agency (EPA) is expected to propose for regulatory use. It is intended to replace ISCST3 for most modeling applications. AERMOD is the result of an effort to incorporate scientific knowledge gained over the last three decades into regulatory plume models. AERMOD requires, as input, three ...
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Evaluation of new generation atmospheric dispersion models
The paper considers the regulatory view of evaluating dispersion models. There is no proscription for regulatory studies in the UK, so differences between dispersion calculations from different models and versions of models are then as important as their absolute veracity. An example shows variations in calculated concentration due to variations between two different versions of a model and two ...
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Modeling Tip: How Parallel Processing can Expedite Large AERMOD Model Runs
Due to advances in scientific knowledge, higher resolution raw data, stringent air quality standards, and changing regulations, environmental modeling is demanding more and more from EHS professionals and their computers. All of these influences have resulted in significantly longer AERMOD model run times as compared to the predecessor regulatory model, ISCST. Instead of minutes, AERMOD runtimes ...
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Modeling Tip: How to Merge BREEZE Remote Modeling System’s Results with the Local .AMZ File and View Results in BREEZE AERMOD
The BREEZE Remote Modeling System (BRMS) is a Web-enabled application that executes AERMOD model runs in a fraction of the time they take on a desktop computer, thereby assisting modelers in reducing model runtimes on large or highly time-sensitive AERMOD model runs. The BRMS operates on a massively parallel computer cluster that combines the processing power of multiple multi-core computers. As ...
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Comparison of the Polish regulatory dispersion model with AERMOD
Implementation of the 96/62/EC air quality directive in Poland imposes new requirements that cannot be met by the present Polish regulatory climatological dispersion model that is mandatory in emission permit procedures. For use in the air quality management system, newer models have been recommended. This inevitably brings questions regarding consistency between models used for both the ...
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Custom software solutions to modeling challenges
For over 25 years, BREEZE Software has developed a wide range of applications including air dispersion, accidental release, and explosion safety assessment models. In addition to the BREEZE product line, the development staff evaluates, develops, and adapts dispersion modeling algorithms for specific needs and builds custom software for government and various industries worldwide. The ...
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`An evaluation of aermod model sensitivity to variations in landuse characteristics,` presented at guideline on air quality models: next generation of models conference 2009
Abstract The development and release of the AERSURFACE landuse preprocessing program forAERMET/AERMOD has substantially changed the process for determining the landusecharacteristics (i.e. surface roughness, albedo, and Bowen ratio) that surround ameteorological monitoring site. Previous modeling guidance recommended that a 3-kilometer (km) upwind fetch in wind-direction-based sectors be ...
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A dispersion model intercomparison archive
The paper introduces a formal archive for intercomparison of conventional regulatory dispersion models. It stems from an initial intercomparison, for the UK Environment Agency, of the USEPA's ISC and AERMOD models with the ADMS model, in common use in the UK. The objective is to compare the models directly with one another via standard test cases in order to reveal differences that may arise in ...
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Performance of AERMOD vs. CALPUFF on Fugitive Emission Sources in the Nearfield
Abstract On November 9, 2006, the AMS/U.S. EPA Regulatory Model (AERMOD) replaced the Industrial Source Complex (ISC) model as the U.S. EPA-approved regulatory model for analyses in the nearfield (less than 50 kilometers from a site). The CALPUFF modeling system, another U.S. EPA-approved model typically regarded as a long-range transport model, can also be utilized in the nearfield on a ...
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ADMS 5 Buildings Validation Robins and Castro Wind Tunnel Experiments
1 Introduction Experiments were conducted in a simulated boundary layer representative of a suburban, or slightly rougher, environment in neutral stability conditions at a model scale of 1/300 of full scale. Concentrations were measured close to a cube-shaped building for emissions above the centre of the building roof. Release heights varying from one to two-and-a-half times the building height ...
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Aermod View - New Alpha Options in Aermod 22112
With the latest release of the AERMOD model dated 22112, the U.S. EPA has continued to expand the formulated capabilities of the model. Most of these updates have been added as ALPHA non-default options, a concept we covered in a previous modeling tip. AERMOD 22112 contains 6 new ALPHA options which are described below: Platform Downwash Taken from the Offshore and Coastal Dispersion Model ...
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Modeling Tip: How to Import BREEZE AERMOD files into BREEZE Risk Analyst for Human Health Risk Assessments
Humans can be exposed to hazardous air pollutants (HAPs) either directly through inhalation or indirectly through ingestion or dermal contact, which can result in acute or chronic health effects. The risk of exposure varies depending on a number of variables, including the meteorological conditions, local geographical and emissions characteristics, the age of the individuals being exposed, and ...
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Aermod View - Working With Different Model Versions in Aermet View
With each successive update to the AERMOD modeling system published by the U.S. EPA to the Support Center for Regulatory Atmospheric Modeling (SCRAM) website, Lakes Software updates our AERMOD View and AERMET View applications to support the new models. In previous Modeling Tips, we’ve discussed how to choose earlier versions of the AERMOD executable in AERMOD View, but it is also possible ...
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`Top 10 Things You Should Be Asking Your Dispersion Modeler Now,` presented at the 2008 FET Conference
Agenda Introduction to Modeling (short course) Top 10 List – Questions you should beasking your dispersion modeler Introduction to Modeling Definition Why Model? Types of Models AERMOD background Definition Dispersion modeling is a technique ofcalculating concentrations of pollutantsresulting from emissions to the atmosphere Easy if a single isolated stack ...
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BREEZE software releases AERMOD ISC version 7.1
BREEZE Software releases its first update to AERMOD/ISC Version 7, first introduced in early 2009.The 7.1 Version includes enhancements requested by current users.We will explore four of these new features. Roadway sshot The new roadway tool allows users to create roadways made up of volume sources. Available in BREEZE AERMOD/ISC version 7.1. ISCST3 Integration BREEZE has integrated both the ...
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`Sensitivity of Aermod to meteorological data sets based on varying surface roughness,` presented at the 2009 air & waste management association`s annual conference
Abstract Dispersion modeling in support of regulatory programs for federal, regional, state and localpermitting relies on the U.S. Environmental Protection Agency’s AERMOD Model as specifiedin the Guideline on Air Quality Models (40 CFR 51, Appendix W).1 Internal calculations inAERMOD for daytime mixing in the convective boundary layer and night time mixing in thestable boundary layer rely ...
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Modeling Tip: How to import model objects from AERMOD-related files into BREEZE AERMOD
BREEZE AERMOD provides modelers with the ability to import model objects from existing AERMOD related files. The supported files include EPA AERMOD and ISC input files (.dat), BREEZE AERMOD input files (.ami), source files (.pnt), receptor files (.rec), and building files (.bld). With these file types, users can import model object data including, but not limited to, locations, exit temperatures, ...
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AERMOD View - Debug Output Files
When conducting an air dispersion modeling analysis with the AERMOD modeling system, modelers may encounter situations where they want to validate or verify the model’s calculations. To support this, the model has the ability to generate Debugging Output Files of intermediate calculation results. This is controlled by the Control Pathway using the DEBUGOPT model keyword. As the ...
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