AirQUIS OverviewModelling    February 20, 2018  English (United Kingdom) Español (España)
AirQUIS - Modelling

In the modern multi modular environmental information system like AirQUIS steps have been taken to establish models for air pollution dispersion to enable environmental impact assessment estimates. Models are essential when the programmes are to be used for planning purposes. The models need as input data some background information on:

  • Source characteristics and emission data

  • Area characteristics (surface roughness, topography etc.)

  • Measurement data (measurement type, heights etc.)

  • Meteorological data (wind, stability, mixing height, temperatures etc.)

  • Dispersion coefficients (type to be used and parameters)

  • Dry and wet removal coefficients

  • Location of receptor points (distances or grid specifications)

A Eulerian type numerical dispersion model is the EPISODE model developed by NILU. It represents the most applied model in AirQUIS today. This is a time-dependent finite difference model normally operating in three vertical levels, combined with a sub grid line source model for traffic and a puff trajectory model for industry stations to account for subgrid effects close to individual sources. The wind field used as input to the model may be homogeneous or inhomogeneous for each time step dependent upon the meteorological input data available.

AirQUIS Contacts
Tel:  +47  69898000
Eml: airquis@nilu.no
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