From Odour Services
Atmospheric dispersion modeling is the mathematical simulation of how air pollutants disperse in the ambient atmosphere. It is performed with computer programs that solve the mathematical equations and algorithms which simulate the pollutant dispersion. The dispersion models are used to estimate or to predict the downwind concentration of air pollutants emitted from sources such as industrial plants and vehicular traffic. The models are typically employed to determine whether existing or proposed new industrial facilities are or will be in compliance with the regulatory guidelines. The models also serve to assist in the development of effective control strategies to reduce emissions of harmful air pollutants to acceptable levels.
Currently, the most robust methodology for assessment of the levels of exposure from odorous processes is to utilise atmospheric dispersion modeling techniques. Through careful consideration, an appropriate odour criterion (expressed in terms of concentration and frequency of exposure e.g. 3.0 OuE/m3 at the 98th percentile of hourly averages) can be applied to the output of the dispersion model to predict the area where potential odour annoyance may occur.
Odour Monitoring Ireland provides:
- Odour dispersion modeling service utilising AERMOD Prime, Calpuff, ISC Prime and ADMS.
- DGPS mapping of site and residences for input data to the dispersion model.
- Terrain data development for input data to dispersion model in complex terrain.
- On-site meteorological station set-up for long-term odour assessment.
- Abatement system sizing, design and assessment utilising dispersion modeling software.
We have an extensive database of synoptic meteorological station data for use in the dispersion model with a minimum of 3 to 5 years of hourly sequential met data used within model runs.