The keyword PROPPRINT will cause property arrays defined using parameters in the LPF or UPW packages to be printed to separate files. This option is only available in MODFLOW-OWHM. However, this information can be printed to the listing file in any version of MODFLOW.
For parameter estimation and visualization purposes, the user can now output the actual property arrays that are constructed and used by LPF or UPW. This aids in understanding the final result for input files that contain complex parameter scaling, multiplier arrays, and zone arrays. The arrays are printed as row-column slices to a separate file for each LGR grid and layer. Some of the properties that are printed include lateral hydraulic conductivities (Kx, Ky), vertical hydraulic conductivities (Kv), specific storage (Ss), and specific yield (Sy).
To initiate printing of the model parameters to separate files the keyword “PROPPRINT” is specified in the PVAL file after the variable NPVAL. If PVAL is not needed, but parameter printing is desired, then PVAL must appear in the NAM file and NPVAL be set to 0, followed by the keyword “PROPPRINT” (without quotes).
PROPPRINT is read as part of the PVAL file, which structure would be as follows:
#URWORD COMMENTS THAT BEGIN WITH “#”
NPVAL {OPTIONS}
Where
OPTIONS is the optional keyword “PROPPRINT” without quotes
When activated, this option will output for each model layer individual files for each hydraulic property used within the model (only model layer 1-L1 shown here), such as the following:
Horizontal hydraulic conductivity: PARAM_HKC_G1_L1.txt
Conductivity Anisotropy Ratio: PARAM_HKR_G1_L1.txt
Vertical Hydraulic Conductivity: PARAM_VKA_G1_L1.txt
Specific Storage: PARAM_Ss_G1_L1.txt
Specific Yield: PARAM_Sy_G1_L1.txt”
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