ISC3 (Industrial Source Complex) model is a popular steady-state
Gaussian plume model which can be used to assess pollutant concentrations from a wide variety of sources associated with an industrial complex.
This model can account for the following:
*
Point, area, line, and volume sources
*
Settling and dry deposition of particles
*
Downwash
In aeronautics, downwash is the change in direction of air deflected by the aerodynamic action of an airfoil, wing, or helicopter rotor blade in motion, as part of the process of producing lift.Crane, Dale: ''Dictionary of Aeronautical Terms, thir ...
* Separation of point sources
* Limited terrain adjustment
ISC3 operates in both
long-term and short-term modes. The screening version of ISC3 is
SCREEN3
SCREEN3 is a technology used and designed by Motorola to push news and information to mobile phones.
Functionality
The SCREEN3 feature functions by downloading headlines and displaying these to the user as part of the contents of the ''idle scree ...
.
Very recently, the status of ISC3 as a
Preferred/Recommended Model of the
US Environmental Protection Agency
The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it be ...
has been withdrawn, but it can still be used as an alternative to the Preferred/Recommended models in regulatory applications with case-by-case justification to the reviewing authority.
Input data
ISC short term version required two sets of data: source data and hourly averaged
meteorological
Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not ...
data:
Source data
* Dimensions of the source
*
Emission
Emission may refer to:
Chemical products
* Emission of air pollutants, notably:
**Flue gas, gas exiting to the atmosphere via a flue
** Exhaust gas, flue gas generated by fuel combustion
** Emission of greenhouse gases, which absorb and emit radi ...
discharge rate
* Release height of the emission source
Meteorological data
* Ambient temperature, K
* Wind direction
* Wind speed, m/s
* Atmospheric
stability classes (A through F, entered as 1 through 6)
*
Urban and rural mixing height, m
See also
*
Bibliography of atmospheric dispersion modeling
Atmospheric dispersion modeling is the mathematical simulation of how air pollutants disperse in the ambient atmosphere. It is performed with computer programs that include algorithms to solve the mathematical equations that govern the pollutant ...
*
Atmospheric dispersion modeling
Atmospheric dispersion modeling is the mathematical simulation of how air pollutants disperse in the ambient atmosphere. It is performed with computer programs that include algorithms to solve the mathematical equations that govern the pollutant ...
*
List of atmospheric dispersion models
Atmospheric dispersion models are computer programs that use mathematical algorithms to simulate how pollutants in the ambient atmosphere disperse and, in some cases, how they react in the atmosphere.
US Environmental Protection Agency models
Man ...
Further reading
For those who are unfamiliar with air pollution dispersion modelling and would like to learn more about the subject, it is suggested that either one of the following books be read:
www.crcpress.comwww.air-dispersion.com
External links
ISC3 User's Guide, Volume IISC3 User's Guide, Volume IIMeteorological Monitoring Guidance for Regulatory Modeling Applications
{{Atmospheric, Oceanographic and Climate Models
Atmospheric dispersion modeling