7.1.1. Perm.Conditioning.FileName

string Perm.Conditioning.FileName [“NA”]

This key specifies the name of the file that contains the conditioning data. The default string NA indicates that conditioning data is not applicable.

pfset Perm.Conditioning.FileName   "well_cond.txt"

The file that contains the conditioning data is a simple ascii file containing points and values. The format is:

nlines
x1 y1 z1 value1
x2 y2 z2 value2
.  .  .    .
.  .  .    .
.  .  .    .
xn yn zn valuen

The value of nlines is just the number of lines to follow in the file, which is equal to the number of data points.

The variables xi,yi,zi are the real space coordinates (in the units used for the given parflow run) of a point at which a fixed permeability value is to be assigned. The variable valuei is the actual permeability value that is known.

Note that the coordinates are not related to the grid in any way. Conditioning does not require that fixed values be on a grid. The PGS algorithm will map the given value to the closest grid point and that will be fixed. This is done for speed reasons. The conditioned turning bands algorithm does not do this; conditioning is done for every grid point using the given conditioning data at the location given. Mapping to grid points for that algorithm does not give any speedup, so there is no need to do it.

NOTE: The given values should be the actual measured values - adjustment in the conditioning for the lognormal distribution that is assumed is taken care of in the algorithms.

The general format for the permeability input is as follows:

list Geom.Perm.Names [no default]

This key specifies all of the geometries to which a permeability field will be assigned. These geometries must cover the entire computational domain.

pfset GeomInput.Names   "background domain concen_region"