User:Milton Beychok/Sandbox: Difference between revisions

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The '''ADMS''' (Atmospheric Dispersion Modelling System) is an advanced [[Air pollution dispersion modeling|air pollution dispersion model]] for calculating the concentrations of [[air pollution|air pollutants]]  emitted both [[Air pollution dispersion terminology|continuously]] from [[Air pollution dispersion terminology|point, line, volume and area sources]], or [[Air pollution dispersion terminology|intermittently]] from point sources.<ref name=CERC>[http://www.cerc.co.uk/software/adms4.htm The CERC web site pages about ADMS]</ref> It was developed by [[Cambridge Environmental Research Consultants (CERC)]] of the [[United Kingdom]] (UK) in collaboration with the UK's [[Met Office]], [[National Power plc]]<ref>Now [[INNOGY Holdings plc]]</ref> and the [[University of Surrey]]. The first version of ADMS was released in 1993 and the current version 4 was released in 2007.<ref name=CERC/>


==Typical applications==
ADMS is used to model the environmental impact of existing or proposed industrial facilities. It can also be used to assess air quality with respect to the air quality standards such as the [[European Union]] [[Air Quality Directive]],<ref>[http://ec.europa.eu/environment/air/quality/legislation/directive.htm New Air Quality Directive] From the European Union's website</ref> the UK [[Air Quality Strategy]],<ref>[http://www.defra.gov.uk/environment/airquality/strategy/index.htm Air Quality Strategy] from the website of the UK's [[Department for Environment, Food and Rural Affairs]]</ref> the [[United States|U.S.]] [[National Ambient Air Quality Standards]] (NAAQS) and the [[World Health Organization]] (WHO) [[Air Quality Guidelines]].<ref>[http://www.euro.who.int/Document/E90038.pdf Air Quality Guidelines] From the website of the World Health Organization</ref> Some typical applications are:
:;*Demonstrating compliance with the UK [[Integrated Pollution Prevention and Control]] (IPPC) regulations<ref>[http://www.ippc-info.co.uk/ IPCC Information]</ref>
:;*[[Flue gas stack|Stack]] height determination,
:;*Odor modeling,
:;*Environmental impact assessments
:;*Safety and emergency planning
==Features and capabilities==
The model includes [[algorithm]]s which take into account: [[Air pollution dispersion terminology|downwash]] effects of nearby buildings within the path of the dispersing pollution plume; effects of complex terrain; effects of coastline locations; [[Air pollution dispersion terminology|wet deposition]], gravitational settling and [[Air pollution dispersion terminology|dry deposition]]; short term fluctuations in pollutant concentration; chemical reactions; [[radioactive decay]] and gamma-dose; [[Atmospheric dispersion modeling#The Briggs plume rise equations|pollution plume rise]] as a function of distance; jets and directional releases; averaging time ranging from very short to annual; and condensed plume visibility. The system also includes a built-in [[Meteorology|meteorological]] data input preprocessor which allows a variety of input meteorological data. <ref name=CERC/>
The model is capable of simulating [[Air pollution dispersion terminology|passive or buoyant]] continuous plumes as well as short duration [[Air pollution dispersion terminology|puff]] releases. It characterizes the [[Air pollution dispersion terminology|atmospheric turbulence]] by two parameters, the [[boundary layer]] depth and the [[Monin-Obukhov length]], rather the single parameter [[Air pollution dispersion terminology|Pasquill class]]. <ref name=CERC/>
ADMS can model up to 300 [[emission]] sources, of which: <ref name=CERC/>
* up to 300 may be point or jet sources
* up to 30 line sources, 30 area sources and 30 volume sources, may be modelled simultaneously
The performance of the model has been validated against more than 15 measured dispersion data sets.<ref>[http://www.cerc.co.uk/software/publications.htm Documentation: Validation papers]</ref>
==Users of the ADMS==
The users of ADMS include:
:* UK governmental regulatory authorities including the [[Health and Safety Executive|UK Health and Safety Executive]] (HSE)
:* [[Environment Agency]] of England and Wales
:* Over 130 individual company license holders in the UK
:* [[Scottish Environment Protection Agency]] (SEPA) in Scotland
:* [[Environment and Heritage Service]] in Northern Ireland
:* Governmental organizations including the [[Food Standards Agency]] (UK)
:* Users in other European countries, Asia, Australia and the Middle East
:* Accepted by [[U.S. Environmental Protection Agency|U.S. EPA]] as an "Alternative" model<ref>[http://www.epa.gov/scram001/dispersion_alt.htm Alternative models] From the website of the U.S. EPA</ref>

Revision as of 17:42, 7 July 2009

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