Particles and Gas Dispersion Modeling

When a project submitted to the Environmental Impact Assessment System (SEIA) emits pollutants or precursors of pollutants into the atmosphere, air quality models are frequently used as a tool to evaluate the impact of these emissions on the air resource, and the consequent impact on other renewable natural resources and people’s health.

Due to the relevance of this resource, the Environmental Assessment System (SEA) established the “Guide for the use of Air Quality Models”, which presents clear criteria, good practices and the minimum information necessary for the assessment, so to advance in improving the environmental evaluation in Chile and to comply with the legal mandate established in Law No. 19,300.

This Guide provides information and guidelines on the most relevant aspects of modeling within the environmental assessment, namely:

  • Air quality models to use in Chile
  • Input data
  • Presentation of data used and results
  • Analysis of results and uncertainty

In this regard, this Guide recommends the Calpuff and Aermod models as models to simulate the dispersion of particles and gases in Chile, where our company has extensive experience and has the Calpuff View and Aermod View licenses. For meteorological modeling, which is an input for these dispersion models, our company generates this information through the use of the Weather Research and Forecasting – Advanced Research WRF (WRF-ARW) model.

Our PARTICULAS professionals have more than 16 years of experience in modeling the dispersion of atmospheric pollutants. We have carried out modeling of meteorological variables with the WRF model and modeling of the pollutant’s dispersion in various areas of Chile, from complex high mountain terrain, such as complex coastal terrain, achieving excellent levels of modeling performance.

Our models are applied to industrial complexes and you can perform the following services:

Statistical analysis to develop baseline using OpenAir-Project

Modeling the meteorology of a full year.

Annual modeling of the dispersion and deposition of particles and gases.

Assimilation of surface and height meteorological data.

Environmental impact evaluation.

Determination of the ​​influence area.

Deposition of toxic pollutants.

Dispersion in regions near large bodies of water.

Impact of point, area or line sources.

Long-range or short-range pollutant transport studies.

We invite you to learn more about our personalized service carried out in companies as important as CODELCO, Anglo American, Minera Escondida Limitada, Quimetal Industrial S.A., SQM S.A., ESCO Elecmetal S.A., ENAP Refinerías S.A., Aes Gener S.A., SUEZ, among others.


More than 16 years of national and international experience.

Experts in air quality with a PhD or Master's degrees.

Personalized service.

We are part of Huella Chile.

We are part of the Global Pact Chile.

We have zero accidents at work since the creation of our company.

We have strong collaborative ties with important international institutions.

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If you are interested in our services, do not hesitate to contact our company.