Multimedia Tools for
Advanced GIS Training in Europe

The MUTATE project is funded by the Educational Multimedia Task Force of the European Union.

MUTATE Educational Multimedia Project MM1019 (ET):
Internal Deliverable D3.3

Air Quality Model

Environmental modeling, spatial analysis, air quality, systems architecture, networking, client-server, HPCN, http,
Release June 1998
Author: Kurt Fedra

Programme name Educational Multimedia
Project Acronym MUTATE
Contract number MM 1019 (ET)
Project title MUltimedia Tools for Advanced gis Training in Europe
Deliverable number ID3.3
Deliverable title AIr QUality Model
Deliverable version number 1.1
Work package WP3 (Development and integration of complex dynamic simulation models and sptial DSS
Nature of the deliverable Online Multimedia component
Dissemination level Limited to Programme Participants
Contractual date of delivery PM13 (January 1999)
Actual date of delivery PM13 (online)
Author Dr.Kurt Fedra
Environmental Software & Services GmbH
Kalkgewerk 1   PO Box 100
A-2352 Gumpoldskirchen, AUSTRIA
tel: +43 2252 633 05
fax: +43 2252 633 059
Project technical co-ordinator Dr.Joao Ribeiro da Costa, Chiron - Sistemas de Informacao, Lda.
tel: +351 1 3500 278
fax: +351 1 2943 710

Air Quality Models

Executive Summary

This deliverable contains, as a hyperlinked on-line Multimedia document, a short description and introductory documentation of the main air quality models used for the MUTATE model server.

The Deliverable

  • describes an initial set of models to be integrated, and provides on-line references to detailed model documentation;

  • summarizes the model documentation and user manuals;

  • describes the model data requirements and the model results;

  • presents selected application examples as illustration;

  • and it provides links to the current first demonstration prototype examples of Java-based and fully Internet accessible server implementation using the Geneva case study to illustrate some interface style elements and possible functionality for the integration into the course material.
As an on-line working document, it is being updated periodically to reflect progress in WP 3, and be linked to the other Deliverables in the D3 group as they become available.

Model documentation: ISC-3 air quality dispersion model

The basic air quality model used in MUTATE is the Inudstrial Source Complex model (ISC) of the US EPA. ISC is a steady-state Gaussian dispersion model that is available both in a short-term version for individual episodes of, say,

one hour averaging time, or as a seasonal long-term model. ISC-3, while using the basic Gaussian steady-stae solution to the dispersion equations that is based on the simplifying assumption of a homogeneous wind field throughout the mdodel domain, introduces a number of corrections and modifications that makes the model more suitable for complex terrain.

A more recent version of the ISC famili of models is the new AERMOD system that is developed from ISC.

ISC: Industrial Source Complex dispersion model


ISC (Industrial Source Complex Model) has been specifically developed to simulate air pollution due to an industrial plant, taking accurately into account the effect of high stacks on the behaviour of the pollutant plume. It may be applied in urban or rural environment with a moderately complex terrain. Its numerous options allow to compute the dry deposition of the pollutant downwind the stacks, to model the plume hight accounting for the hydrodinamical effects, to simulate the impact of linear, area and volumetric sources. It works with non reactive pollutant, including particulate matter, but may include a first order decay.

The program has two versions. In the long term version (ISCLT), it computes average concentration values on an area of few hundred square kilometers for a period like a season or a year, on the basis of the correspondent meteorological data. The short term version (ISCST) computes mean concentration values for a period of one or few hours.


description: air quality, gaussian plume, stationary conditions, industrial sources, moderately complex terrain
objectives: simulation
application: point sources, line sources, area sources, volume sources, long term, short term, short range, non reactive pollutant


         The model is part of UNAMAP and is available on diskette from:      
           Computer Products      
           National Technical Information Service      
           U. S. Department of Commerce      
           Springfield, Virginia 22161      
           Phone (703) 487-4650      


            Curtis P. Wagner      
            TRC Environmental Consultants, Inc.      
            800 Connecticut Boulevard      
            East Hartford, Connecticut 06108      


  • G.A.Briggs, "Diffusion estimation for small emissions" USAEC report ATDL-106. U.S. Atomic Energy Commision, Oak Ridge, TN, 1974
  • G.A.Briggs,"Plume rise predictions", Lectures on Air Pollutions and Environmental Impact Analyses, American Meteorological Aociety, Boston, MA, pp. 59-111, 1975
  • F.A.Gifford,"TURBOLENT DIFFUSION TYPING SCHEMES A REVIEW", Nuclear Safety, 17: 68-86, 1976. EPA-450/2-78-027R, GUIDELINE ON AIR QUALITY MODELS U.S. Environmental Protection Agency, 1986;
  • A.H.Huber, W.H.Snyder, "Wind investigation of the effect of a rectangular-shaped building on dispersion of effluents from short adjacent stacks", A.E. Vol.16, 1982;
  • F.Pasquill, "Atmospheric dispersion parameters in gaussian plume modeling part II: possible requirements for change in the turner workbook values", EPA publication no. epa 600/4-76-030b. U.S.Environmental Protection Agency, research triangle, park, nc., 1976;
  • D.B.Turner,"WORKBOOK OF ATMOSPHERIC DISPERSION ESTIMATES", PHS Publication No. 999-26. U.S. Environmental Protection Agency, Research Triangle, Park, NC, 1969;


  • J.F.Bowers, A.Anderson, "An Evaluation Study for the Industrial Source Complex (ISC) Dispersion Model", EPA Publication No. EPA-450/4-81-002, 1981;
  • J.F.Bowers, A.Anderson, W.R.Hargraves, "Tests of the Industrial Source Complex (ISC) Dispersion Model at the Armco Middle-town, Ohio Steel Mill", EPA Publication No. EPA-450/4-82-006, 1982;
  • J.S.Scire, L.L.Schulman, "Evaluetion of the BLP and ISC Models with SF& Tracer Data and SO2 Mesaurements at Aluminum Reduction Plants", Air Pollution Control Assosation Speciality Conference on Dispersion Modeling for Complex Sources, ST. Louis, 1981;

Copyright 1995-2002 by:   ESS   Environmental Software and Services GmbH AUSTRIA