GMS:DE4 Package

MODFLOW
Pre-processing
	MODFLOW Commands
	Building a MODFLOW Model
	Map to MODFLOW
	Calibration
	Packages Supported in GMS
	Saving a MODFLOW Simulation
	Importing MODFLOW Files
	Unsupported MODFLOW Features
	Run MODFLOW
Post-processing
	MODFLOW Display Options
	MODFLOW Post-Processing Viewing Options
	Reading a MODFLOW Simulation
Tutorials
Packages
Flow:	BCF6, HUF, LPF, UPW
Solvers:	DE4, GMG, NWT, PCG,; PCGN, LMG, SIP, SOR,; SMS
Other:	BAS6, BFH, CHD1, CLN, DRN1, DRT1, EVT1, ETS1, GAGE, GHB1, GNC, HFB1, HUF, LAK3, MNW1, MNW2, OUT1, RCH1, RIV1, SFR2, STR1, SUB1, SWI2, WEL1, UZF1
	v • e

The DE4 package or Direct Solver is one of the solvers available for MODFLOW. It requires reading in a DE4 file.

For more information on this solver see page 84 of the USGS documentation at http://pubs.er.usgs.gov/usgspubs/ofr/.

The MODFLOW DE4 Solver package dialog.

DE4 File Format

FOR EACH SIMULATION
 0.  [#Text]
 1.  ITMX   MXUP   MXLOW   MXBW
 2.  IFREQ  MUTD4  ACCL    HCLOSE   IPRD4

Item 0 is optional—“#” must be in column 1. Item 0 can be repeated multiple times.

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