| ADMS-Airport
is a comprehensive tool for managing air quality at airports. It is
an extension of the ADMS-Urban model, designed to model the concentration
of pollutants at airports in rural or complex urban environments.
WHO
USES ADMS-Airport?
ADMS-Airport has been
used to model air quality at London’s Heathrow airport for the
2002 base case and future year scenarios as part of the Department for
Transport’s (DfT) Project for Sustainable Development of Heathrow
(PSDH) – Adding
Capacity at Heathrow. This followed the recommendations of the PSDH
Model
Inter-comparison Study.
ADMS-Airport
is also one of the participating models in the ICAO CAEP model exercises
(International Civil Aviation Organisation, Committee on Aviation Environmental
Protection).
2002 base case, modelled NO2 concentrations in µg/m3
around Heathrow, taken from
“Adding Capacity at Heathrow Airport – Air Quality Studies
for Heathrow” (2007)
ABOUT
ADMS-Airport
ADMS-Airport
air quality model is a comprehensive tool for managing air quality at
airports. It can be used to examine emissions from 6500
sources simultaneously, including:
Aircraft Jet Sources |
Up to 500 aircraft jet sources |
Road Traffic |
Over 70,000 road links (1500
road sources each with up to 50 vertices) |
Industrial Sources |
Up to 1500 point, line,
area or volume sources |
Aggregated Sources (grid source) |
Up to 3000 grid cells
can be used to model emissions from sources that are too small
to define explicitly, for example, emissions from domestic housing. |
WHY USE ADMS-Airport?
ADMS-Airport incorporates
all the features of ADMS-Urban
plus it is able to incorporate sources specific to an airport. ADMS-Airport
is able to take into account the whole range of relevant emission sources:
aircraft traffic, auxiliary power units, ground support equipment, road
traffic, industrial, commercial, domestic and other less well-defined
sources.
ADMS-Airport
makes use of the ADMS jet model to calculate the impact of aircraft
exhausts. The jet model calculates an integral solution to the equations
of conservation of mass, momentum, heat and species, capturing the effect
of the movement of the jet engine source in reducing the effective buoyancy
of the exhaust. This is particularly important in capturing the near
field dispersion from the high momentum, buoyant take-off ground roll
sources.
To model the airport’s flight schedule in detail
users can construct up to 500 annual hourly profiles. These detailed
schedules can also be used for detailed modelling of non-airport sources,
such as the effect of school terms and public holidays on road traffic.
For less detailed time dependent modelling ADMS-Airport
allows up to 50 diurnal and 50 monthly profiles plus wind direction
dependence for any source.
ADMS-Airport
and EMIT
(CERC's Emissions Inventory
Toolkit) have been developed
with a number of features to simplify the modelling process and help
users. For example:
GIS |
ADMS-Airport
has links to ArcGIS 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
(in EMIT)
|
Issue 15 of the ICAO emission factors (released
July 2007) can be used to calculate emissions from the thrust
setting, time in mode and the number of landing-take-off cycles.
FAA emission factors can be used to calculate APU emissions from
the operation time. Emission factors derived from EC Non Road
Mobile Machinery (EC directive 97/68/EC) limit values can be used
to calculate GSE emissions from the operation time.The latest
UK DMRB emission factors (released February 2003) can be used
to calculate emissions from traffic flows and speeds. |
Intelligent gridding |
ADMS-Airport
includes an intelligent gridding option which places extra output
points in and adjacent to aircraft jet sources and road sources
to give excellent spatial resolution in areas of particular interest.
|
User-defined outputs |
The user defines the pollutant and averaging time which may
be an annual average or a shorter period, and also which percentiles
and exceedence values to calculate, and whether a rolling average
is required or not. 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-Airport is supplied
with a User Guide that details user inputs and outputs specific to ADMS-Airport
and the modelling of airport emissions inventories in EMIT.
It 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,
- 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.
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