Air Dispersion Modelling involves the mathematical simulation of pollutant dispersion to assess the potential impact of proposed activities or operations on air quality.

DDA utilises dispersion models to predict receptor concentrations of air pollutants, particulates and odours emitted from a wide range of sources, including industrial plants and vehicular traffic. Dispersion modelling is further used for the determination of buffer zone requirements around plants or sites, such as waste disposal facilities. DDA has a variety of operation-specific emission calculation models and methodologies for the estimation of emission inventories required in dispersion modelling.

The Air Dispersion Models currently utilised by DDA include:

  • EDMS (Airports)
  • HIWAY (Roads)
  • CALINE 4, CAL3QHC (Roads)
  • FDM (Dust)
  • AERMOD (Industry)
  • CALPUF (Industry)