MODFLOW is designed to simulate
aquifer systems in which (1) saturatedflow
conditions exist, (2) Darcy's Law
applies, (3) the density of ground water
is constant, and (4) the principal
directions of horizontal hydraulic
conductivity or transmissivity do not
vary within the system. These conditions
are met for many aquifer systems for
which there is an interest in analysis of
ground-water flow and contaminant
movement. For these systems,
MODFLOW can simulate a wide
variety of hydrologic