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SIM_ADJUST -- A computer code that adjusts simulated equivalents for observations or predictions

Ground Water Modeling Investigation Report GWMI 2008-01

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Abstract

This report documents the SIM_ADJUST computer code. SIM_ADJUST surmounts an obstacle that is sometimes encountered when using universal model analysis computer codes such as UCODE_2005 (Poeter and others, 2005), PEST (Doherty, 2004), and OSTRICH (Matott, 2005; Fredrick and others (2007). These codes often read simulated equivalents from a list in a file produced by a process model such as MODFLOW that represents a system of interest. At times values needed by the universal code are missing or assigned default values because the process model could not produce a useful solution. SIM_ADJUST can be used to (1) read a file that lists expected observation or prediction names and possible alternatives for the simulated values; (2) read a file produced by a process model that contains space or tab delimited columns, including a column of simulated values and a column of related observation or prediction names; (3) identify observations or predictions that have been omitted or assigned a default value by the process model; and (4) produce an adjusted file that contains a column of simulated values and a column of associated observation or prediction names. The user may provide alternatives that are constant values or that are alternative simulated values. The user may also provide a sequence of alternatives. For example, the heads from a series of cells may be specified to ensure that a meaningful value is available to compare with an observation located in a cell that may become dry. SIM_ADJUST is constructed using modules from the JUPITER API, and is intended for use on any computer operating system. SIM_ADJUST consists of algorithms programmed in Fortran90, which efficiently performs numerical calculations.

Additional Publication Details

Publication type:
Report
Publication Subtype:
Organization Series
Title:
SIM_ADJUST -- A computer code that adjusts simulated equivalents for observations or predictions
Series title:
Ground Water Modeling Investigation Report
Series number:
GWMI 2008-01
Issue:
2008-01
Year Published:
2008
Language:
English
Publisher:
International Ground Water Modeling Center
Publisher location:
Golden, CO
Contributing office(s):
National Research Program - Central Region
Description:
vi, 28 p.
Number of Pages:
36
Country:
United States