environmental software Articles
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Aermod View - Concentration Converter
The AERMOD modeling system contains many flexible output options so users can define the types of output that will work best for their unique situations. Despite this flexibility, some components of AERMOD’s code are limited to specific units or file types. For example, users can modify the default emission & output units but these units are still mass-based. To provide users with ...
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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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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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CALRoads View - Hourly Concentration Output in CAL3QHCR
CALRoads View includes three mobile source air dispersion models: CALINE4, CAL3QHC, and CAL3QHCR. These models are used for predicting air pollution concentrations of carbon monoxide (CO), nitrogen dioxide (NO2), particulate matter (PM), and other inert gases from idle or moving vehicles. The CAL3QHCR model is enhanced to process up to one year of hourly meteorological data. However, the output ...
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Aermod View - Upper Air Data Modifications with Aermet
The AERMET meteorological data pre-processor contains many different features designed to aid users in performing quality control tasks as data are processed. This includes the ability to audit specific variables, modify valid data ranges, and more. One feature built into AERMET’s Upper Air Pathway is designed to check for potential problems within the sounding and potentially correct ...
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Calpuff View - Automated Coastline Download
One feature of the CALPUFF model is the ability to depict coastal interaction effects. Since the land surface can heat more rapidly than adjoining water, a Thermal Internal Boundary Layer (TIBL) can form and bring elevated source plumes close to the ground. This sets up a potential coastal fumigation scenario, which is illustrated in the figure below. ...
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AERMOD View - Reporting Individual Annual Averages from a Multi-Year Run
For a very long time, using AERMOD to calculate the maximum annual average over a multi-year period required multiple model runs with each year being processed separately. That changed with a U.S. EPA update which allowed the model to produce individual year annual average results via the Post-Processing Output File (POSTFILE). It is important to note that the main AERMOD output file (*.ADO ...
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Defining Shapefile Map Projections in Lakes Software Applications
A key feature of Lakes Software’s commercial products is the ability to easily import base maps in a wide variety of file formats. Supported formats include raster images (e.g., JPG, BMP, PNG, GIF, etc.), AutoCAD DXF, Digital Line Graphs (DLG), Shapefiles, and more. One of the supported formats - shapefiles - can be very useful because, in addition to geographic location data, they can ...
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CALPUFF View - Changing the Default Text Editor
Most air dispersion models use simple text files for reading inputs and writing output data. To display these files, Lakes Environmental’s applications use the system’s default text editor. Users may prefer to use a different text editor to utilize different functionality or format data differently. To take advantage of these additional features, you can change the default text editor ...
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Aermod View - Data Substitutions in Aermet
When conducting an air dispersion modeling analysis, it is very important that the meteorological data quality is as high as possible. AERMET – the meteorological pre-processor for the AERMOD dispersion modeling system – contains internal options which can boost data quality by filling short gaps of missing cloud cover and temperature data. AERMET utilizes linear interpolation for ...
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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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CALPUFF View - New Top 50 Table Viewer
The CALPOST program is a powerful postprocessor used to average and report results based on data in the CALPUFF model output files. Because CALPOST’s operations are external to CALPUFF, modelers can perform many different operations without needing to re-run CALPUFF just to see additional averages or analyze impacts in a different way. Much of the data calculated or produced by CALPOST is ...
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Queensland Rail – An example in effective noise mapping and noise control implementation for existing rail operations
There is an increasing trend in the world today to model noise impacts of city-wide infrastructure such as rail, road and industrial activities. This is particularly true of the European Union, which sought to produce an integrated approach across member states to predict city-wide long term average noise levels. The outcome of such an exercise usually results in production of noise contour ...
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Your local waste management operation spends more time on odour management than you think
When it comes to odour management at landfills, it’s widely accepted that prevention is better than a cure. Any possibility of slightly reducing odour impact can save navigating the fallout of a disruptive situation for waste management operations and local communities. However, odour is notoriously difficult to measure and manage. Moreover, limiting the impact of offensive odours is a ...
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Pennsylvania's US Environmental Standards on Vapor Intrusion
Vapor intrusion occurs due to volatile substances found in groundwater or soil, and they find their way into buildings inhabited by human beings. Vapor phase intrusion of the volatile substances is a threat to human health. The Pennsylvania Department of Environmental Protection (PADEP) provides guidelines and standards used for the evaluation of vapor intrusion under site-specific standard (SSS) ...
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Real-time tracking of accidental atmospheric releases: LOSTRAC software
The LOSTRAC software is devoted to real-time tracking of accidental atmospheric releases. It allows one to calculate, within a few minutes from the moment when the accident is reported and localised, displacement and diffusion of atmospheric pollution. It also provides short-term evolution forecasting. It should become one of the tools for assisting the authorities in charge of safety operations ...
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BREEZE is the market-leading air dispersion modeling software used by environmental professionals around the world
While most air dispersion modeling is conducted using meteorological data from recent past years and historical or projected emissions data, models can also be used with real-time or short-term forecast meteorological and emissions data to estimate impacts at the present time and in the near future. In order to develop these custom real-time air dispersion modeling and forecasting systems, ...
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Modeling Tip: How to Set Up Variable Density Receptor Grid in AERMOD
BREEZE is the market-leading air dispersion modeling software used by environmental professionals around the world Receptors are specific locations, set up in air quality dispersion models, where ambient concentration estimates or deposition values are needed. If the model is being used to conduct an air quality analysis for regulatory purposes, it is important to identify the extent and ...
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