Release Level	5.3.0 beta
Release Date	2007 06
Revision Level	1.1

Locating Air Quality Monitoring Stations

This is based on identifying the points a maximum annual average concentrations using AERMOD for either buoyany gases or particles, based on a complete set of 8640 hourly runs for a calender year. Please note that the annual model run requires a COMPLETE data set iof wind and temperature data. Small gaps of up to four hours can be patched automatically. For larger gaps, the model run will be aborted and a corresponding warning issued.

The concentration field from a successful run is analysed for populated areas (a thematic map layer) and the set of user defined receptor areas in a user defined domain around the source. Up to three location for monitoring stations (with a user defined exclusion radius) are defined with decreasing annual average concentration.

The user defined parameters include:

1. the emission source (point sources only);
2. the pollutant to be considered (SO2, NOx, PM10);
3. year and meteo station: please note that the annual run requires a complete data set; gaps of up to four hours can be patched automatically, larger gaps will be identified by a pre-processor (checker) that will abort the scenario.
4. the model domain and grid resolution; please note that extreme values will lead to a model run of several hours !
5. exclusion radium around any solution/location found: the model identifies the first location (maximum annual average concentration over populated area or receptor area); around this location, an area defined by the exclusion radius will be ignored for the location of the second and third locations.

The results are shown as color coded crosses at the proposed locations, together with a tabular summary of the annual average concentrations at these locations.

Details of the results can be viewed with the options to create isolines of concentration and zoom into the domain.