CALPUFF Model Options   

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Graphics:

When air pollution dispersion modeling is required, it can be useful to present the results in graphical form. The graphical output can be used in-house in the evaluation of modeling results or as an important part of a permit application or modeling report.

Graphics is an enhanced tool enabling the user to create plots and/or animation files. The user has the ability to create multiple plots for user specified parameters, print the plots, and save the plots to a designated location with the click of a mouse. This tool is directly connected to the SURFER® version 8 software package 

The BREEZE Graphics software for the CALPUFF modeling system contains a graphical analysis application that can be used to visualize data from CALMET and CALPUFF. The application also provides the user with the ability to create SURFER plots and animation files for single or multiple data layers. 

SURFER is a graphics package that allows the user to create two- and three-dimensional graphics of model results and input data. However, the entry process for the SURFER program can make plotting a time-consuming project. Graphics  provides a front-end Windows application specializing in air pollution dispersion modeling applications. The simple, graphic interface makes data entry simple and enables direct sharing of model input data. Default command settings have been set to be most useful for dispersion modeling applications. The user may change the settings to customize the data output.

Graphics improves productivity by offering users the following advantages: 

• Intuitive interface means fewer mouse clicks are required to complete a task.
• Expert interface displays only those options which apply to the user's modeling scenario.
• Integration between SURFER and BREEZE eliminates duplicate data entry and streamlines the creation of powerful graphics.
• Easy to create professional graphics and reports.
• Comprehensive online documentation and help.
• Takes full advantage of the powerful Windows operating system.

Animator:

The Animation tool enables the user to animate the plots created within the graphics tool. The user has the ability to create animation files and save those files to a designated location with the click of a mouse.

Model Object Array Generator:

BREEZE CALPUFF enables the user to create arrays of model objects within various configurations for use in the modeling scenario. The arrays may include sources, receptors, hills, and buildings within a Cartesian grid, polar grid, polygonal grid, polyline, or line configuration.

This feature can significantly reduce the amount of time to create a scenario file.

Receptors: 

Receptor grids can be created automatically or manually using Cartesian or polar coordinates. Discrete and complex receptors can also be defined. Concentrations and deposition flux can be calculated for all receptors. An unlimited number of receptors can be modeled.

Emission Rates Variation: 

Production variations can result in time varying emission rates. BREEZE can model this emission rate variation diurnaly, monthly, seasonal and hourly combined, speed and stability category combined, and temperature.

Building Downwash Analysis (BPIP):

The Building Profile Input Program (BPIP) is used to calculate direction specific building downwash parameters used by the dispersion model. The present versions of BREEZE offer two alternatives for processing building data: BPIP or the newer BPIP-PRIME, which incorporates the revised plume rise and building downwash algorithms. he correct version of BPIP is automatically selected for you. You can choose which BPIP is run by checking the PRIME option in the Control Options-Dispersion /Averaging folder.

BREEZE seamlessly integrates BPIP into the modeling scenario.  The creation, execution, and importation of BPIP results is done automatically by BREEZE, reducing the amount of time you spend working on an analysis and increasing quality control.

Basemaps:

It is often helpful to display an image of the modeling domain within the BREEZE interface. This not only provides a frame of reference but also can help with the quality control of model object placement.

BREEZE allows the importation of one of the following into each project scenario.

• Windows Bitmap (.bmp)
• JPEG File Interchange Format (.jpg)
• Tagged Image File Format (.tif)

Images can be imported into the modeling scenario from an external file or from direct importation from BREEZE's WorldGeoData.com website.  There is a directly link to this web service that allows users to download images free from the web for any area that WorldGeoData provides images for.  The service automatically retrieves the image associated with the coordinates defined within the modeling scenario.

Terrain Importation:

BREEZE CALPUFF allows the user to import terrain elevations from a variety of file types for specified model object types.  Data file types include:

• USGS90: Digital Elevation Model (DEM) files from the United States Geological Survey (USGS). They cover an area that is 1 degree of latitude by 1 degree of longitude (roughly 100 km) at a resolution of 3 arc-seconds (~ 90 meters at the middle latitudes).  Get this data now
• USGS30: Digital Elevation Model (DEM) files from the United States Geological Survey (USGS). They cover an area that is 7.5 minutes of latitude by 7.5 minutes of longitude (roughly 14 km) at a horizontal resolution of 30 meters.  Get this data now
• ARM3: 30 second resolution data (~900 m) for the US (available on CDROM from NTIS). The coordinates are in lat/lon.
• 3CD: 1 Degree resolution DEM data (~90 m) in binary format used by Rocky Mountain Communications. The coordinates are in lat/lon.
• DMDF: 7.5 Minute DEM (30 meters) data provided by the Alberta Environmental Protection Agency. The coordinates are in UTM.
• GTOPO30: 30 second resolution DEM data (~900 m) covering the entire world, available for web download. The coordinates are in lat/lon
•  USGSLA: 30 second resolution DEM data (~900 m) covering the entire world, in Lambert Azimuthal Projection.
• NZGEN: Generic New Zealand File Format. These are ascii files at varying spacings and formats in lat/lon coordinates.
• GEN: Generic File Format - These are ascii files at varying spaces and formats in UTM or Lambert Conformal coordinates.