descibes the TimeEvents mechanism

time events

'Time events' implement various actions that are triggered at a specific time during a running simulation. The event schedule is defined in a simple tabular format (text file) and allows changing settings as well as executing javascript functions.

setting parameter values during runtime

Via the environment file values for several parameters (i.e. project file settings) can be defined spatially explicit. A similar approach exists for setting parameter values in time. This feature is controlled with the timeEventsEnabled and timeEventsFile keys in the model.world-section of the project file.
It works as follows:
The file timeEventsFile is loaded and interpreted as a CSV text file. The column year is mandatory. Every other column name is interpreted as key in the project file, or as special key. In the year given in the year column the values from the other columns of a row are processed, i.e. set.
If the column name is:

  • 'script' or 'javascript': the value is interpreted as javascript expression and evaluated in the management context.
  • every other value is interpreted as a key in the XML file (see above for examples). The respective value is set.

Some remarks:

  • the "TimeEvents" are executed in the beginning of a year (see here).
  • only a limited set of XML settings react directly to changed values during a model run. The "CO2-concentration" is an example for a sensitive setting.
  • iLand expects the timeEventsFile in the "script path".
  • the first year of the simulation is the year 1.

Created by werner. Last Modification: Tuesday 24 of February, 2015 10:13:11 CET by werner.