Appendix 6. Odour Buffer Assessment [As Published] · 132007.2399

                                                                                            [12]
              Odour Buffer Assessment
              StarCo Developments




            Figure 4.2: Example of Local Wind Field for One Hour Predicted by CALMET




4.5 CALPUFF

CALPUFF (Scire et al., 2000a) is a multi-layer, multi-species non-steady state puff dispersion model
that can simulate the effects of time and space varying meteorological conditions on pollutant
transport, transformation and removal. The model contains algorithms for near-source effects
such as building downwash, partial plume penetration, sub-grid scale interactions as well as
longer-range effects such as pollutant removal, chemical transformation, vertical wind shear and
coastal interaction effects. The model employs dispersion equations based on a Gaussian
distribution of pollutants across the puff and takes into account the complex arrangement of
emissions from point, area, volume, and line sources.

CALPUFF is endorsed by the US EPA, and has been used in many studies in Queensland and other
parts of Australia.




1898a report final.doc                                                   PAE Job Number 1898a