ISC3 model is a popular steady-state Gaussian plume model

Air pollution dispersion terminology

Air pollution dispersion terminology includes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling...

 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
  Air pollution dispersion terminology
  Air pollution dispersion terminology includes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling...
  
  
• Settling and dry deposition of particles
  Air pollution dispersion terminology
  Air pollution dispersion terminology includes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling...
  
  
• Downwash
  Air pollution dispersion terminology
  Air pollution dispersion terminology includes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling...
  
  
• Separation of point sources
• Limited terrain adjustment

ISC3 operates in both long-term and short-term

Air pollution dispersion terminology

Air pollution dispersion terminology includes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling...

 modes. The screening version of ISC3 is SCREEN3.

Very recently, the status of ISC3 as a Preferred/Recommended Model of the US Environmental Protection Agency

United States Environmental Protection Agency

The U.S. Environmental Protection Agency is an agency of the federal government of the United States charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress...

 has been withdrawn, but it can still be used as an alternative to the Preferred/Recommended models in regulatory applications with case-by-case justification to the reviewing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 data:

Source data

• Dimensions of the source
• Emission
  Air pollution
  Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or cause damage to the natural environment or built environment, into the atmosphere....
  
   discharge rate
• Release height of the emission source

Meteorological data

• Ambient temperature, K
• Wind direction
• Wind speed, m/s
• Atmospheric stability classes
  Air pollution dispersion terminology
  Air pollution dispersion terminology includes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling...
  
   (A through F, entered as 1 through 6)
• Urban and rural
  Air pollution dispersion terminology
  Air pollution dispersion terminology includes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling...
  
   mixing height, m

See also

• Bibliography of atmospheric dispersion modeling
• Atmospheric dispersion modeling
  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 solve the mathematical equations and algorithms which simulate the pollutant dispersion...
  
  
• List of atmospheric dispersion models

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.com
www.air-dispersion.com

External links

• ISC3 User's Guide, Volume I
• ISC3 User's Guide, Volume II
• Meteorological Monitoring Guidance for Regulatory Modeling Applications