air software model Articles
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Canarina DISPER Software · air dispersion · algorithms 1
Software · air dispersion · algorithms 1 Symbol / Definition A = Linear decay term for vertical dispersion in Schulman-Scire downwash (dimensionless) Ae= Effective area for open pit emissions (dimensionless) D = Exponential decay term for Gaussian plume equation (dimensionless) DB= Brownian diffusivity (cm/s) Dr= Relative pit depth (dimensionless) de= Effective pit ...
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Canarina DISPER software · persistent free radicals · air dispersion · commands 1
Welcome to Canarina DISPER - software for air dispersion modeling. The DISPER software allows you to create robust and useful numeric simulations that fully make use of the graphical user interface. This chapter show you how to sep up DISPER on your computer. We can say, with a certain security that the software DISPER 5.2 are one of the best tools, if not the best and simpler, to carry out ...
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Canarina DISPER software · air · environmental impact assessment · algorithms 11
Canarina DISPER software · air · environmental impact assessment Unstable or Neutral - Momentum Rise. For situations where the stack gas temperature is less than or equal to the ambient air temperature, the assumption is made that the plume rise is dominated by momentum. If DT is less than (DT)c, the assumption is also made that the plume rise is dominated by momentum. The ...
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Canarina DISPER software · roadway air dispersion modeling · commands 19
7.1.2 View The View Menu contains the tools you use to view your computer screen. The File Menu lists: Zoom, Black background, White background, Draw grid lines, Eliminate grid lines, Draw picture, Eliminate picture, XY View and XZ View. Zoom.- We have the possibility to zoom a part of the program window with the Zoom command. However, we won't be able to enlarge background pictures with this ...
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Canarina DISPER software · atmospheric dispersion modeling · commands 9
XZ-Plane (perpendicular to land surface): In such a case, the program window is a XZ-plane (perpendicular to the land surface). A pollutant point source (stack) is represented by a small square. In the Status bar at the bottom, we have X,Y and Z coordinate values in meters and data on our environmental system. Point the mouse where you want in the program window and the X,Y and Z values will ...
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Dispersion modelling of toxic air pollutants from fossil fuel combustion facilities
The emissions of toxic air pollutants from three power plants and one oil refinery were measured for a period of six months and dispersion of pollutants were calculated by using Air Dispersion Modelling Software (ADMS–4). The plume concentration of carbon monoxide, oxides of nitrogen, sulphur dioxide and particulate matter were calculated over long distances to estimate the incremental ...
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Canarina DISPER Software · air quality modeling system · algorithms 5
Canarina DISPER Software · air quality modeling system The mathematical model that the software uses provides options to model emissions from a wide range of sources that might be present at industrial areas and urban areas. The basis of the model is the straight-line, steady-state Gaussian plume equation, which is used to model simple point source emissions from stacks, roads, ...
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Canarina DISPER Software · air quality information system · algorithms 4
Canarina DISPER Software · air quality information system Symbol / Definition z= Receptor/terrain height above mean sea level (m) zd= Dry deposition reference height (m) zr= Receptor height above ground level (i.e. flagpole) (m) zref= Reference height for wind speed power law (m) zs= Stack base elevation above mean sea level (m) zi= Mixing height (m) z0= Surface roughness ...
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Canarina DISPER software · air · environmental management · algorithms 12
Canarina DISPER software · air · environmental management Stable - Buoyancy Rise. For situations where DT exceeds (DT)c as determined above, buoyancy is assumed to dominate. The distance xf is determined by xf=2.0715 us s-1/2 (18) The plume height, he, is determined by he=hs+2.6 [Fb/(uss)]1/3 (19) Stable - Momentum Rise. Where the stack gas ...
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Canarina DISPER Software · air toxics dispersion model · algorithms 7
Canarina DISPER Software · air toxics dispersion model 9.1.2 Downwind and Crosswind Distances The model uses a Cartesian receptor network. All receptor points are converted to Cartesian (X,Y) coordinates prior to performing the dispersion calculations. In the Cartesian coordinate system, the X axis is positive to the east of the user-specified origin and the Y axis is positive to ...
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Studies of air quality predictors based on neural networks
In recent years, urban air pollution has emerged as an acute problem because of its negative effect on health and living conditions. Regional air quality problems, in general, are linked to violations of specified air quality standards. The current study aims to find neural network based air quality predictors, which can work with a limited number of datasets and are robust enough to handle data ...
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Canarina DISPER Software · air quality dispersion model · algorithms 3
Canarina DISPER Software · air quality dispersion model Symbol / Definition Ly= Initial plume length for Schulman-Scire downwash sources with enhanced lateral plume spread (m) Lb= Lesser of the building height and crosswind projected building width (m) _= Alongwind length of open pit source (m) P(x,y)= Profile adjustment factor (dimensionless) p= Wind speed power law profile ...
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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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Air and thermal coupling
SoilVision systems Ltd. is pleased to announce the addition of full air and thermal coupling between the SVAirFlow® and SVHeat® Professional software packages. The addition extends the capabilities of the software to model flow of air in the pore space of soils. In particular, the flow of air as a result of thermal gradients can be accomplished. This addition allows benefits in modeling ...
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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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Canarina DISPER software · air · environmental reporting · algorithms 14
Canarina DISPER software · air · environmental reporting 9.1.5 The Dispersion Parameters Point Source Dispersion Parameters: Equations that approximately fit the Pasquill-Gifford curves are used to calculate sigy and sigz (in meters) for the rural mode. The equations used to calculate sigy are of the form: sigy=465.11628 x tan (TH) (29) where: ...
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The Air Quality Management Decision Support System (AQMDSS) for Beijing, People's Republic of China
The People's Republic of China (PRC) has been experiencing rapid economic and industrial growth with associated increased air pollution. Government officials strive to improve air quality while maintaining growth. Implemented control measures have not achieved air quality goals; therefore, the Beijing Municipal Environmental Protection Bureau turned to air quality models to help identify sources ...
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Development of an integrated system for air pollutant dispersion modelling
A complex expert system for air pollutant dispersion modeling (ScalEx) is currently being developed at Faculty of Technology and Metallurgy in Belgrade. The project goal is to develop a powerful software system as an engineering toolbox for modelling air pollutant dispersion under various conditions and terrain configurations. ScalEx is planned to be an integrated software system of the new ...
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Six technologies that shaped EH&S
This year, the Air & Waste Management Association celebrates its centennial. The past 100 years have yielded remarkable technological advances, especially in the area of information technology (IT). Within our professional lifetimes, we have shifted from using manually typed memos and reports, pink telephone message slips and pagers to computer-generated reports, Internet data exchange, e-mail, ...
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