Information for Consultants

​​Consultants involved in atmospheric dispersion modelling in Tasmania must be familiar with Clause 11.1 and Schedules 2 and 3 of the Environment Protection Policy (Air Quality) 2004.

Prior to commencement of modelling, consultants should contact the EPA Tasmania Air Modelling Officer - contact details below.

Non-specific Atmospheric Dispersion Modelling Guidelines are available. However, a discussion with the EPA Air Modelling Officer prior to commencement of modelling for a specific project would ensure that the consultant uses modelling tools appropriate for the task at hand and relevant settings for the particular model.​

  Atmospheric Dispersion Modelling Guidelines   (131Kb)

The Director, EPA​ has approved several models for use in Tasmania. These include:

  • TAPM (V4.0 or later). TAPM is a mesoscale model that was developed by the CSIRO for predicting the dispersion of air pollutants and provides a range of outputs for visual interpretation of pollutant dispersion under changing weather conditions and summary statistics. It is frequently used in Tasmania to generate prognostic meteorological input for the modelling domain. 

  • Calmet/Calpuff​ (V6.4 or later). Calmet/Calpuff is a pair of meteorological and dispersion models developed in the US and adopted by the US EPA as a preferred model for assessing long range transport of pollutants. The models are often run in conjunction with the TAPM generated meteorological data as there are ​very few weather stations in Tasmania.

Use of other models, such as AERMOD or industry-specific models requires prior consultation with the EPA Tasmania Air Modelling Officer. It should be noted that steady-state models like AERMOD or Ausplume can only be used if the assumption that meteorological conditions are spatially uniform (or near-uniform) is valid and there is no large water body present. Such conditions are not very common in Tasmania because of its complex topography. However, Ausplume (V.6.0) model can successfully be used as a screening model.

​Modelling results have to be presented appropriately with references to the relevant design criteria included in the Environment Protection Policy (Air Quality) 2004 applied “at or beyond the boundary of the land" of the premises involved. All input, output and meteorological files used in the dispersion modelling should be made available in an electronic format (compatible with the modelling software used or in a text format).​​​​

The NSW Environment Protection Authority has provided useful guidance documents for modellers​ including CALMET/CAL​PUFF users.

The New Zealand Ministry for the Environment has prepared a useful ​guide to atmospheric dispersion modelling.​