We are specialized in the development and adoption of numerical models. We mainly use the simulation model suites AriaIndustry and AriaRegional distributed by Aria Technologies and Arianet.

Logo Arianet     Aria Technologies

We are also offering solutions by adopting the EPA models Aermod and Calpuff.


Almost all our data analysis is performed with R [1], Python and QGIS.

R logo     Python logo     R logo

Computational Fluid Dynamics (CFD) models of choice are ENVI-met for micro-climate studies and OpenFOAM [2] for all other cases.

envimet     OpenFOAM


ARIA Impact

ARIA Impact is a user-friendly software adapted to meet the needs of industry, consulting firms and air quality monitoring agencies.
The model is consistent with regulations on air quality and provides the basic elements for assessing human health risks and olfactory nuisance.
It calculates the long-term impact of air pollutants (gaseous or particulate) from different type of emission sources and yields pollutant concentration and deposition (dry and wet) expressed as annual averages or percentiles. It has a special module for reproducing dispersion during calm winds and it can account for different phenomena such as reflection of gas plumes by the mixing layer.


SPRAY is a three dimensional lagrangian model suitable to study the transport and diffusion of non reactive pollutants in complex terrain, from micro-scale to regional scale.
This code reproduces the transport, dispersion, dry and wet deposition and radioactive decay of airborne chemically inert species released in meteorological complex conditions (low windspeed, flow over complex topography), often marked by spatial and temporal inhomogeneities of the meteo-diffusive variables (e.g. vertical wind-shear, breeze due to the presence of terrain discontinuities).
In addition, it is also possible to reproduce the dispersion of particulate emissions, taking into account the gravitational vertical settling phenomenon.
SPRAY can simulate emissions from point, area or line sources, continuous and discontinuous. It can also compute mean and instantaneous concentrations on a three-dimensional grid defined by the user, differentiating the calculation by “chemical species” or by “source”.



FARM (Flexible Air quality Regional Model) is a 2D/3D photochemical eulerian model to study the transport, chemical transformation and deposition of reactive pollutants (photo chemisty and particulate) on a urban or regional scale. The model has been derived from STEM (G.R. Carmichael, Centre for Global and Regional Environmental Research, Univ. of Iowa).
FARM major features include: emission of pollutants from area and point sources, with plume rise calculation and mass assignment to vertical grid cells; three-dimensional transport by advection and turbulent diffusion; simple or detailed cloud module; transformation of chemical species by gas-phase chemistry, with flexible mechanism configuration; dry removal of pollutants dependent on local meteorology and land-use; wet removal through precipitation scavenging processes, etc.



TREFIC is a tools to compute the vehicular traffic emissions according to the COPERT IV/ Corinair methodology developed by the European Environment Agency .
The code manages the calculation of atmospheric emissions of each road link or area source, aggregated on any temporal basis.



ArRisk is an integrated model system able to simulate the transport and diffusion of pollutants in the atmosphere. It is based on Lagrangian particle models and it has been originally developed to assess the consequences of accidental release of toxic gases. It includes a model to compute the release dynamics typical of accident scenarios in industrial sites.
ArRisk can also be used to assess odour impact and exposure to toxic, cancerous or radioactive agents.

[1] The R logo is © 2016 The R Foundation and is distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International license (CC-BY-SA 4.0).

[2] This offering is not approved or endorsed by OpenCFD Limited, producer and distributor of the OpenFOAM software and owner of the OPENFOAM® and OpenCFD® trade marks.