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Πλήρες Περιβάλλον Μοντελοποίησης για το Μοντέλο ISCST3 της EPA
ISC View is a complete and powerful Windows interface to the popular U.S. EPA (EPA) Industrial Source Complex - Short Term Model (ISCST3). Unique features in ISC View are used by hundreds of professionals worldwide to model emissions for permitting and for risk assessment. EPA requires an Air Pathway Assessment (APA) for every SuperFund site and soil remediation. ISCST3 is the main model recommended by EPA for the APA. This package is based on the Gaussian plume model and is widely used to assess pollution concentration and/or deposition flux on receptors, from a wide variety of sources, commonly from an industrial source complex. This model was designed to support the EPA's regulatory modeling options as specified in the Guidelines on Air Quality Models (Revised).
Some of the ISCST3 modeling capabilities are:
The ISCST3 model may be used to model primary pollutants and continuous releases of toxic and hazardous waste pollutants.
The ISCST3 model can handle multiple sources including point, volume, area, and open pit source types. Line sources may also be modeled as a string of volume sources or as elongated area sources.
Source emission rates can be treated as constant or may be varied by month, season, hour-of-day, or other optional periods of variation. These variable emission rate factors may be specified for a single source or for a group of sources.
The model can account for the effects of aerodynamic downwash due to nearby buildings on point source emissions.
The model contains algorithms for modeling the effects of settling and removal (through dry deposition) or large particulates and for modeling the effects of precipitation scavenging for gases or particulates.
Receptors locations can be specified as gridded and/or discrete receptors in a Cartesian or polar coordinates.
The ISCST3 model uses real-time meteorological data to account for the atmospheric conditions that affect the distribution of air pollution impacts on the modeling area.
The ISC View interface includes all the ISCST3 modeling options in addition to the following:
ISC View has an integrated modeling environment: intuitive data input, model run, and full featured post-processing with automatic gridding, blanking, contour plotting, and posting of your results.
Graphically view your modeling options including sources, receptors, buildings, and imported base maps in AutoCAD DXF file format.
Automatically eliminates receptors within your plant boundary.
Automatically imports terrain elevations from 1 degree and 7.5 minute U.S. Geological Survey (USGS) Digital Elevation Models (DEMs).
Specify the UTM zone of your site and ISC View will automatically find all DEMs in that UTM zone and stitch them together.
Automatic creation of your terrain grid file for deposition analysis using DEMs.
ISC View Postprocessor automatically reads, grids and plots your results. You can display multiple plots with site maps, posting, and blanking. Results can also be exported to SURFER. High quality graphics of your modeling results can be printed directly or pasted into your favorite Windows word processor.
Set preferences for the EPA ISCST3 executable model. This allows for the execution of models with parameters exceeding the default 300 sources and 1200 receptors found in the EPA version of ISCST3.
The program checks valid ranges for all entry fields which will save you time by preventing incorrect entries. Before running your project, ISC View displays a report of all options selected along with a list of any missing information.
ISC View comes with a context-sensitive "Help that really helps" which provides you with clear explanations of modeling requirements.
The ISC View interface uses the five pathways that compose the ISCST3 runstream file as the basis for its functional organization. These pathways are:
Control Pathway (CO): where you specify the modeling scenario and the overall control of the modeling run.
Source Pathway (SO): where you define the sources of pollutant emissions. In this pathway you must specify the location of the source and source parameters, i.e., emission rate, physical stack height, stack gas exit velocity, etc. Optional inputs include: source elevation, building dimensions, variable emission rates, particle size distributions, scavenging coefficients, etc.
Receptor Pathway (RE): where you define the receptors to determine the air quality impact at specific locations. Input requirements are the location and optional ground elevation for each receptor.
Meteorology Pathway (ME): where you define the atmospheric conditions of the area being modeled so that it can be taken into account when determining the distribution of air pollution impacts for the area. ISCST3 requires hourly surface weather data that can be preprocessed by Rammet View which comes FREE with the ISC View package.
Terrain Grid Pathway (TG where you have the option of specifying gridded terrain data to be used in calculating dry depletion in an elevated or complex terrain.
Output Pathway (OU): where you define which output results are necessary to meet the needs of the air quality modeling analyses. Various types of output files can be produced. You may choose to output concentration, dry deposition flux, wet deposition flux or total deposition flux. ISC View comes with a postprocessor that can plot these results for you automatically.
Import terrain elevations
Various types of output files can be produced. You may choose to output concentration, dry deposition flux, wet deposition flux, or total deposition flux. ISC View comes with a postprocessor that can plot these results for you automatically.
ISC View Postprocessor
The ISC View Postprocessor carries out all the time-consuming tasks of generating, gridding and displaying the plot files for the ISC model. For easy reference and visualization of your results, you can import map files in AutoCAD DXF format and use as a backdrop for your contour plots.
For quality-report presentation, you can print the contour plots with the overlaid site map using ISC View project templates. You can also copy the contour plot drawings to the clipboard and paste them into your favorite Windows word processing program.
With the ISC View Postprocessor, the need of buying a graphics package like SURFER is eliminated. However, if you want to use SURFER, ISC View can also export results to SURFER.
Within the Contour Options dialog box, you can:
Change the contour levels to be displayed on the contour plots.
Change the color and thickness of the contour lines and the color, font type, font size and display of the contour labels.
Control the smoothing of the contour lines and the size of the contour mesh.
Change the size, font and number of decimal points for the posting of values at each receptor location.
Control the display of receptor locations, contour lines, overlay map, overlay blanking boundary, and posting.
Support Packages: BPIP View and Rammet View (Included)
Additional features are:
- BPIP View - Interface for the EPA Building Profile Input Program (BPIP)
- BPIP View is a graphical interface to speed up the work load involved in setting up input data for the U.S. EPA's BPIP model (Building Profile Input Program). The BPIP model calculates direction-specific building widths and building heights for use with the ISC model in downwash analyses. BPIP View is a true, native Microsoft Windows application and runs in Windows 3.1, Windows 3.11 (Windows for Workgroups), Windows 95, and Windows NT.
BPIP View's data input for location and dimension of buildings (structures) and stacks can be done in two ways : (1) graphically, where you can digitize buildings and stacks on the screen with your mouse, or (2) in text mode, where you can add information in a spreadsheet-like input form.
You can display a site map as an overlay, in Bitmap format (*.BMP) or in AutoCAD DXF format (a standard way of digitizing maps), to visualize the location of stacks, buildings, roads, rivers, etc., and to ease the process of digitizing buildings and stacks for your modeling project.
Import building coordinates directly from your CAD or GIS package. No need to re-enter them.
Context-sensitive "Help that really helps" which includes status bar tips and full-blown Windows-type Help. Help also contains sections of the BPIP User's Guide, to help facilitate the understanding of the model requirements and alternatives.
Rammet View - Interface for the EPA PCRAMMET Meteorological Preprocessor
Rammet View is a Windows interface for the U.S. EPA PCRAMMET meteorological preprocessor. PCRAMMET is used for processing National Weather Service (NWS) data for use in the EPA short term air quality dispersion models such as ISCST3.
Rammet View interface will ease the process of preprocessing meteorological data. The interface includes tips that will guide you through the steps necessary to prepare your met data for use with ISCST3.
Context-sensitive "Help that really helps" which includes status bar tips and full-blown Windows-style Help. Help also contains sections of the EPA PCRAMMET Users Guide, to facilitate the understanding of the model requirements and alternatives.
Requirements: PC 486/Pentium with 8 MB RAM running Windows 3.1, Windows 95 or Windows NT.
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Τελευταία Ενημέρωση 27 Ιουλίου 2004 - Last Revised on July 27th 2004
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