Recognized words are shown in bold italics; these words must be entered exactly as shown except that they may be entered in either uppercase or lowercase. Optional parts of records are shown in brackets. One or more spaces must separate each word or variable, and the total record length must not exceed 199 characters.
FOR EACH SIMULATION
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Data Set 0
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[#Text]
Item 0 is optional—“#” must be in column 1. Item 0 can be repeated multiple times.
# Text—is a character variable (199 characters) that starts in column 2. Any characters can be included in Text. The “#” character must be in column 1. Except for the name file, lines beginning with # are restricted to these first lines of the file. Text is printed when the file is read.
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Data Set 1
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Any combination of the following records:
| • | HEAD PRINT FORMAT IHEDFM |
IHEDFM—is a code for the format in which heads will be printed. (Positive values for wrap format; negative values for strip format.)
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10G11.4
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11G10.3
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9G13.6
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15F7.1
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15F7.2
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15F7.3
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15F7.4
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20F5.0
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20F5.1
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20F5.2
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20F5.3
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20F5.4
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10G11.4
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10F6.0
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10F6.1
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10F6.2
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10F6.3
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10F6.4
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10F6.5
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5G12.5
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6G11.4
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7G9.2
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| • | HEAD SAVE FORMAT CHEDFM [ LABEL] Omit to obtain an unformatted file. |
CHEDFM—is a character value that specifies the format for saving heads, and can only be specified if the word method of output control is used. The format must contain 20 characters or less and must be a valid Fortran format that is enclosed in parentheses. The format must be enclosed in apostrophes if it contains one or more blanks or commas. The optional word LABEL after the format is used to indicate that each layer of output should be preceded with a line that defines the output (simulation time, the layer being output, and so forth). If there is no record specifying CHEDFM, then heads are written to a binary (unformatted) file. Binary files are usually more compact than text files, but they are not generally transportable among different computer operating systems or different Fortran compilers.
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IHEDUN—is the unit number on which heads will be saved.
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| • | DRAWDOWN PRINT FORMAT IDDNFM |
IDDNFM—is a code for the format in which drawdowns will be printed. The codes are the same as for IHEDFM.
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| • | DRAWDOWN SAVE FORMAT CDDNFM [ LABEL] Omit to obtain an unformatted file. |
CDDNFM—is a character value that specifies the format for saving drawdown, and can only be specified if the word method of output control is used. The format must contain 20 characters or less and must be a valid Fortran format that is enclosed in parentheses. The format must be enclosed in apostrophes if it contains one or more blanks or commas. The optional word LABEL after the format is used to indicate that each layer of output should be preceded with a line that defines the output (simulation time, the layer being output, and so forth). If there is no record specifying CDDNFM, then drawdown is written to a binary (unformatted) file. Binary files are usually more compact than text files, but they are not generally transportable among different computer operating systems or different Fortran compilers.
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| • | DRAWDOWN SAVE UNIT IDDNUN |
IDDNUN—is the unit number on which drawdowns will be saved.
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| • | IBOUND SAVE FORMAT CBOUFM [ LABEL] |
CBOUFM—is a character value that specifies the format for saving IBOUND, and can only be specified if the word method of output control is used. The format must contain 20 characters or less and must be a valid Fortran format that is enclosed in parentheses. The format must be enclosed in apostrophes if it contains one or more blanks or commas. The optional word LABEL is used to indicate that each layer of output should be preceded with a line that defines the output (simulation time, the layer being output, and so forth). If there is no record specifying CBOUFM, then IBOUND is written using format (20I4). IBOUND is never written as a binary (unformatted) file.
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IBOUUN—is the unit number on which the IBOUND array will be saved.
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| • | COMPACT BUDGET [ AUX or AUXILIARY] |
If the final “COMPACT BUDGET” option is used, cell-by-cell budget files produced require less disk space than files written by MODFLOW-88; however, programs that read these data using the specifications of MODFLOW-88 will need to be modified. If this option is not used, MODFLOW-2000 will write the files using the MODFLOW-88 method. The optional word “AUX” (or “AUXILIARY”) after “COMPACT BUDGET” indicates that auxiliary data that are defined in packages (see input data for the RIV, WEL, DRN, and GHB Packages) should be saved in the budget file along with budget data. When using MODPATH, the COMPACT BUDGET option with AUX is required.
If the “COMPACT BUDGET” option is used, the time step size, the elapsed time in the current stress period and the total elapsed time will be saved in the budget file.
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PRINT indicates that the model output is written to the LIST file.
SAVE indicates that output is written to the indicated file unit. Drawdown and head are saved as text files if the SAVE FORMAT record is included. If the SAVE FORMAT record is not used, then the file is written as a binary (unformatted) file. Binary files are usually more compact than text files, but they are not generally transportable among different computer operating systems or different Fortran compilers.
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FOR EACH TIME STEP FOR WHICH OUTPUT IS DESIRED
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Data Set 2
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PERIOD IPEROC STEP ITSOC [DDREFERENCE]
IPEROC—is the stress period number at which output is desired.
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ITSOC—is the time step number (within a stress period) at which output is desired.
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DDREFERENCE—indicates that the heads calculated at the associated stress period and time step are to be used as the reference heads for calculating drawdown for all subsequent time steps up to the next occurrence of DDREFERENCE. Prior to the first occurrence (if any) of DDREFERENCE the initial heads will be used as the reference heads for calculating drawdown.
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Data Set 3
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Any combination of the following records:
PRINT HEAD [list layers if all layers not desired]
PRINT DRAWDOWN [list layers if all layers not desired]
PRINT BUDGET Write overall volumetric budget to the LIST file.
SAVE HEAD [list layers if all layers not desired]
SAVE DRAWDOWN [list layers if all layers not desired]
SAVE IBOUND [list layers if all layers not desired]
SAVE BUDGET Write cell-by-cell budget data to a file.
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Item 2 and one or more item-3 records are specified for each time for which output is desired. These records must be in the order of increasing simulation time.
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Example Output Control Input Using Words
The first line cannot be blank, but after the first line blank lines are ignored when the word method is used to specify Output Control data. Indented lines are allowed because of the use of free format input.
HEAD PRINT FORMAT 15
HEAD SAVE FORMAT (20F10.3) LABEL
HEAD SAVE UNIT 30
COMPACT BUDGET FILES
DRAWDOWN PRINT FORMAT 14
PERIOD 1 STEP 1
PRINT HEAD 2 6
PRINT DRAWDOWN
PRINT BUDGET
SAVE BUDGET
SAVE HEAD
PERIOD 1 STEP 7
SAVE HEAD 1 3 5
PRINT DRAWDOWN
SAVE BUDGET
PERIOD 2 STEP 5
PRINT HEAD
PRINT BUDGET
SAVE BUDGET
SAVE HEAD
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