HydroGeoSphere/Intermittent Conditions

Boundary conditions can be turned on and off by assigning special NODATA values instead of normal input in the time-value, time-raster and time-file tables. For example, the default NODATA value is -99999., and the following table:

would apply the specified head of 100 from time 0.0 to time 1000.0 and then allow the node to revert to an unconstrained condition until time 2000.0, when a specified head of 100.0 would again be applied for the duration of the simulation.

For rasters and files, the default NODATA value is the string ' none '.

If for some reason you need to change the default NODATA value you can use:

Nodata value

 * 1) nodata_value The value that indicates there is no data.
 * &bull; &bull; &bull;

The following instructions are used to change the NODATA values used for rasters and files :


 * nodata raster
 * nodata file