Modeling systems that we use:

EK100W

EK100W modeling system is a product of Atmoterm and it is used for air quality assessment (regulatory purposes) for industrial sources as well as for urban air quality studies. The system is based on methodology of air quality assessment recommended by Polish Ministry of Environment Protection, Natural Resources and Forestry. Some additional options and calculation tools are included. The main input data are as follows:

  • Emissions

Emmiter localization, height and diameter; outlet temperature and velocity for each exhoust gases; emission rates (including mass fractions for dust) and time for each variant; automatic transfer from SOZAT emission database is possible.

  • Meteorology

Annual (or seasonal) wind rose including wind speed, wind direction, stability class and frequency for each episode (also precipitation rate if wet deposition option included).

  • Topography

Average roughness coefficient as an output the user is getting 99.8 percentile of concentration (on annual and hourly basis), long term average concentration, maximum concentration and frequency of exceeding the threshold.

ADMS – Urban

ADMS-Urban pollution model is a comprehensive tool for tackling air pollution problems in cities and towns. It can be used to examine emissions from 6000 sources simultaneously. ADMS-Urban is used to model the impact of major developments such as the Beijing Olympic Village, airport expansion and traffic management schemes. It is used to assess current and future air quality with respect to the air quality standards such as the EU Air Quality Directive, UK NAQS, US NAAQS, Chinese Class I, II and III and WHO guidelines.

The following options are available:

  • NOx – NO2 chemistry;
  • the trajectory model;
  • sulphate chemistry.

Other advanced modules are:

  • street canyons;
  • complex terrain;
  • buildings.

These modules are based on the latest understanding of the way these features affect the movement of airflow around the sources, and all have been shown to have considerable affect on observed concentrations.

CALPUFF

CALPUFF is an advanced non-steady-state meteorological and air quality modeling system developed by ASG scientists. It is maintained by the model developers and distributed by TRC. The model has been adopted by the U.S. Environmental Protection Agency (U.S. EPA) in its Guideline on Air Quality Models as the preferred model for assessing long range transport of pollutants and their impacts on Federal Class I areas and on a case-by-case basis for certain near-field applications involving complex meteorological conditions. The modeling system consists of three main components and a set of preprocessing and post processing programs.

The main components of the modeling system are CALMET (adiagnostic 3-dimensional meteorological model), CALPUFF (an air quality dispersion model), and CALPOST (a post processing package). Each of these programs has a graphical user interface (GUI).

In addition to these components, there are numerous other processors that may be used to prepare geophysical (land use and terrain) data in many standard formats, meteorological data (surface, upper air, precipitation, and buoy data), and interfaces to other models such as the Penn State/NCAR Mesoscale Model (MM5), the National Centers for Environmental Prediction (NCEP) Eta/NAM and RUC models, the Weather Research and Forecasting (WRF) model and the RAMS model.

Some examples of applications for which CALPUFF may be suitable include:

  • near-field impacts in complex flow or dispersion situations:
    • complex terrain,
    • stagnation, inversion, recirculation, and fumigation conditions,
    • overwater transport and coastal conditions,
    • light wind speed and calm wind conditions;
  • long range transport;
  • visibility assessments and Class I area impact studies;
  • criteria pollutant modeling, including application to State Implementation Plan (SIP) development;
  • secondary pollutant formation and particulate matter modeling;
  • buoyant area and line sources (e.g., forest fires and aluminum reduction facilities).

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