| ABOUT
ADMS-Roads
The ADMS-Roads pollution model is a comprehensive tool
for investigating air pollution problems due to small networks of roads
that may be in combination with industrial sites, for instance small
towns or rural road networks. ADMS-Roads combines many of the scientific
capabilities of CERC's air quality management system ADMS-Urban with
an easy-to-use interface. Model operation is similar to other ADMS models,
making it a simple task for anyone familiar with ADMS 4 to extend their
modelling skills to cover road sources. For large towns and cities ADMS-Urban
is the preferred tool.
ADMS-Roads can be used to examine emissions from many
sources simultaneously, including:
Road traffic |
Over 7000 road links (150
road sources each with up to 50 vertices) |
Industrial sources |
Up to 3 point, 3 line, 4 area and 25
volume sources |
An example of concentration contours created using ADMS-Roads is
shown above.
WHO
USES ADMS-Roads?
The ADMS models have been extensively used in local air quality management.
ADMS-Urban, on which ADMS-Roads is based, is used across the
world for air quality management and assessment studies of
complex situations in towns, cities, motorways, counties and large industrial
areas. Here in the UK, over 70 local authorities used
the model to help with their first round of Review and Assessment and
in developing air pollution action plans and remedial strategies. The
ADMS models have also successfully been used for examining planning
applications and EIA for proposed industrial, retail and domestic developments.
ADMS-Roads is currently used by a number of consultancies in the UK
and abroad.
WHY USE ADMS-Roads?
The science of ADMS-Roads is significantly more advanced than that
of most other air dispersion models (such as CALINE, ISC and R91)
in that it incorporates the latest understanding of the boundary layer
structure, and goes beyond the simplistic Pasquill-Gifford stability
categories method with explicit calculation of important parameters.
The model uses advanced algorithms for the height-dependence of wind
speed, turbulence and stability to produce improved predictions.
Many factors are important in predicting pollutant concentrations.
The diagram below shows some of the possible inputs to and outputs from
the model, and some of the modelling options available.
ADMS-Roads has been developed with a number of features
to simplify the modelling process and help users. For example:
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ADMS-Roads has links to ArcView
and MapInfo GIS (Geographical Information System)
packages as well as Surfer contour plotting package.
The GIS link can be used to enter and display input data and display
output, usually as colour contour plots. |
Emissions Inventory |
Source and emissions data can be imported from a Microsoft
Access database created by the user or exported from
CERC’s Emissions Inventory Toolkit, EMIT.
EMIT contains current and future emission factors
including those for vehicles, industrial processes and fuel consumption. |
Emission factors |
The latest UK DMRB emission factors (released
February 2003) can be used to calculate emissions from traffic
flows and speeds. |
Intelligent gridding |
ADMS-Roads includes an intelligent gridding
option which places extra output points in and adjacent to road
sources to give excellent spatial resolution in areas of particular
interest. |
User-defined outputs |
The user defines the pollutant, the
averaging time (which may be an annual average
or a shorter period), any percentiles and exceedence
values that are of interest, and whether or not a rolling
average is required. The output options are designed
to be flexible to cater for the variety of air quality limits
which can vary from country to country and over time. |
SUPPORT DETAILS
ADMS-Roads is supplied with an in-depth User Guide that details all
user inputs and outputs, and includes a number of step-by-step worked
examples. An annual maintenance contract provides support for users;
this includes
- maintenance model upgrades,
- use of the ‘Helpdesk’ by email, phone, fax or post,
- attendance at the annual User Group meetings,
- newsletter twice a year, and
- access to the password-protected User
Area
CERC also offer basic and advanced training.
Please call for the latest availability.
If you would like more information on the model, please contact
us. The following pages describe the model
inputs, outputs and advanced
options with details of model validation, and finally some examples
of the model’s user interface.
Continue >>
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