The finite-difference method used by
MODFLOW is relatively easy to understand
and apply to a wide variety of realworld
conditions.
MODFLOW works on many different
computer systems ranging from per-sonal
computers to super computers.
MODFLOW can be applied as a onedimensional,
two-dimensional, or quasior
full three-dimensional model.
Each simulation feature of
MODFLOW has been extensively tested.
Data input instructions and theory are
well documented.
The modular program design of
MODFLOW allows for new simulation
features to be added with relative ease.
A wide variety of computer programs
written by the USGS, other federal
agencies, and private companies are
available to analyze field data and construct
input data sets for MODFLOW.
A wide variety of programs are available
to read output from MODFLOW and
graphically present model results in ways
that are easily understood.
MODFLOW has been accepted in
many court cases in the United States as
a legitimate approach to analysis of
ground-water systems.
This publication outlines the major features
of MODFLOW and several related
programs and gives information on
obtaining programs and documentation.