PAEHolmes is a leader in near-field and far-field dispersion modelling. As PAE, we pioneered the merging of TAPM and CALMET in order to generate high quality meteorological datasets and to streamline multiple model runs – a technique that has now become an unofficial standard for Australian modelling. 

Dispersion modelling allows you to: 

• Assess impact of air emissions
• Determine feasibility of new projects or modifications to existing plants
• Identify source control priorities
• Evaluate air pollution episodes 
• Evaluate compliance with regulations 
• Verify effectiveness of regulations
• Investigate complaints
• Optimise site design, stack heights and processes
• Negotiate license conditions. 

Models use mathematical equations to simulate the physical and chemical processes that affect air pollutants as they disperse and react in the air. 

For models to work most effectively, they need good quality input data on: meteorology (e.g. wind speed, wind direction, temperature and turbulence properties), emissions parameters (source locations, physical characteristics and emission rates), topography (terrain and land use) and building parameters (location and shape of buildings). With our experience and expertise in modelling, we can ensure the right input data is provided to the models and select the appropriate model for your situation.