air quality assessment & management
Reference and User Manual
AirWare   On-line Reference Manual
  Release Level 7.0
  Revision Level beta
  Release Date 2015 03

Last modified on:   Saturday, 18-Jul-15 17:30 CEST

Emission data: sources, inventories, scenarios

AirWare maintains a set of emission inventories as OBJECT CLASSES in the OBJECT DATA BASE with a class specific selector/navigator for Area SOurces, Boilers, Industrial Plants, LIne SOurces, and Small Stacks (default alphabetical order in the OBJECT ClassLIst;

Alternatively, a direct entry point Emission DB leads to a list of organized by domains. The selector of emission inventories shows their name, as well as the number of boilers, small stacks, area sources, and line sources within each of the domains. The listing can be sorted by any of these attributes.

Detailed data structures and data base representations are described in :

The basic goups of emission sources are:

  1. Point sources (raised (industrial) stacks;

    • Industrial plants are groups of stacks and associated boilers, representing industrial installations that also hold administrative data such as street address, contact person, permits, etc.
    • Boilers and stacks which are larger boilers and associated stacks which are :
      • normally grouped into plants possibly together with one or more area sources;
      • usually have time-series of emission and related data such as flue gas temperature and velocity or fuel consumption.
    • Small stacks and their associated boilers, representing smaller sources for which no time series data (but optional description of a generic emission pattern) exist. The may be associated with a primary source other than an industrial boiler (including private central heating plants), e.g., from a restaurant or smaller commercial entity. They can have an (optional) street/contact address of an enterprise attached.

  2. Area sources (commercial and domestic areas or associated with industrial plants);

  3. Line sources (road segments with traffic data, optionally grouped into traffic networks that provide an interface to transportation models).

Access, display, editing, data import

The various emission classes are accessed from:
  1. Main Menu: directly through the OBJECT DATA BASE navigation;
  2. Main Menu: through dedicated summary pages for the three main classes, points, areas, and lines;
  3. Model Menus: through the model specific, dynamically generated emission scenarios which are part of the various model scenarios.
Each of these three CLASSES has its own start page (directly accessible from the main application menu) with summary information describing the current status of the emission inventory. This overview and statistical summary is provided for the default domain of the application, and has a domain selector to provide any local sub-set analysis, e.g., on a province or city level.

The following emission inventory summary pages are available:

  1. Inventory Summary (summary over all source classes);

  2. Point Source Interface (everything with an explicit stack);
  3. Area Source Interface (emission without explicit stack data)
  4. Line Source Interface (traffic generated).

Data structures and attributes

All emission sources are OBJECTs and have the standard OBJECT META DATA associated that include:
  • name, short descriptiopn, owner, creation and last modification date;
  • georeference: symbolic and (type specific, reference point, polygon, line segment);
  • Hypertext description (with import function);
  • Type specific attributes (Descriptors);
  • source specific temporal scaling factors (for month, day, hour)
  • a TABLE of substance specific average emission values;
  • optional one or more substance (or parameter) specific temporal scaling factors;
  • optional time series of emission values (include emission temperature and speed for industrial stacks), and related parameters, with import function.
The emisison inventory covers the territory of the entire domain or location, sources for specific case study (model) areas are extracted dynamically. Modification of emission parameters for scenario analysis are achieved with an additive and multiplicative term that can be specified in the model related scenarios for each average emission value.


The substances covered in the emission inventories include:
  1. CO
  2. SO2
  3. NOx (possibly NO, NO2, or with an NO/NO2 ratio)
  4. PM-10
  5. PM-2.5
  6. VOC
The latter group is broken into a number of sub-groups or species, based on speciation tables that can be associated with any source class, type, or individual source.

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