©1995,1996 Richard B. Winston
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Last modified on Wednesday, January 31, 1996 - 6:11:47 PM
Skip forward to Input instructions for the Output Control Option.
The original instructions for the Output Control Option are on pages 4-14 to 4-16 of McDonald and Harbaugh (1988).
Introduction: The Output Control is used to specify when the heads, drawdowns, water budget and cell by cell flow terms may be sent to the output. (However, cell-by-cell flow terms will not be sent to output unless a unit number is specified in each of the packages for which cell-by-cell flow terms are desired.
Default: Heads and budget are printed at the end of every stress period. If initial heads are saved, drawdowns will also be printed at the end of every stress period. Heads and drawdowns will be printed in 10G11.4 format.
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All input parameters should be right justified.
- Line 1
- Spaces 1-10, IHEDFM, Integer, Printer format codes for heads
- Spaces 11-20, IDDNFM, Integer, Printer format codes for drawdowns
- Spaces 21-30, IHEDUN, Integer, Unit number on which heads will be saved (if they are to be saved)
- Spaces 31-40, IDDNUN, Integer, Unit number on which drawdowns will be saved (if they are to be saved)
- Line 2 (Lines 2 and 3+ are repeated for each time step)
- Spaces 1-10, INCODE, Integer, head/drawdown output code,
- if > 0, Lines3+ will consist of one line for each layer
- if = 0, all layers are treated the same way, Lines3+ consist of one line
- if < 0, specifications for last time step repeated and Lines3+ is not used
- Spaces 11-20, IHDDFL, Integer, if < > 0, heads and drawdowns may be saved as specified in Lines3+
- Spaces 21-30, IBUDFL, Integer, if < > 0, budget will be printed
- Spaces 31-40, ICBCFL, Integer, if < > 0, cell-by-cell flow term will be saved to disk if so specified in the other packages.
- Lines 3+, (May occur 0, 1, or NLAY times per time step depending on INCODE)
- Spaces 1-10, Hdpr, Integer, print heads if < > 0
- Spaces 11-20, Ddpr, Integer, print drawdown if < > 0
- Spaces 21-30, Hdsv, Integer, save head to disk if < > 0
- Spaces 31-40, Ddsv, Integer, save drawdown to disk if < > 0
- Subsequent Lines
Lines 2 and 3+ are repeated for each time step
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Printer FORTRAN format codes for heads. Positive values are used if each row is to be completely finished before starting on the next row (wrap format). Negative values are used when only as many columns are printed as can fit across one (line printer) line. All the heads will be printed but the heads in the layer will be broken into a series of strips (strip format). Some versions of MODFLOW may not support both strip and wrap formats.
- 0 = 10G11.4
- 1 = 11G10.3
- 2 = 9G13.6
- 3 = 15F7.1
- 4 = 15F7.2
- 5 = 15F7.3
- 6 = 15F7.4
- 7 = 20F5.0
- 8 = 20F5.1
- 9 = 20F5.2
- 10 = 20F5.3
- 11 = 20F5.4
- 12 = 10G11.4
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Printer format codes for drawdowns. The same codes as IHEDFM are used.
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Unit number on which heads will be saved (if they are to be saved). Unit numbers can be integers from 1-99. However, 1, 5, and 6 should be avoided. During execution of MODFLOW you will be prompted to supply a file name for each unit number.
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Unit number on which drawdowns will be saved (if they are to be saved). Unit numbers can be integers from 1-99. However, 1, 5, and 6 should be avoided. During execution of MODFLOW you will be prompted to supply a file name for each unit number.
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INCODE is used to tell how many copies of Line 3 will be used
- If you wish to treat each layer differently, set INCODE > 0, Lines3+ will consist of one line for each layer.
- If you wish to treat each layer the same was as every other layer, set INCODE = 0, Lines3+ will consist of one line.
- If you wish to treat each layer in the same way as you did in the previous time step, set INCODE < 0, Lines3+ will not be used. (Of course, you can't use this option for the first time step.)
One copy of Line 2 followed by 0, 1, or NLAY copies of Lines 3+ must be given for each time step.
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If you wish any of the heads or drawdowns either printed or saved to disk, you must set IHDDFL < > 0. You must then set the appropriate flags in Lines 3+.
One copy of Line 2 followed by 0, 1, or NLAY copies of Lines 3+ must be given for each time step.
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If you wish a volumetric budget printed for this time step, set IBUDFL < > 0.
One copy of Line 2 followed by 0, 1, or NLAY copies of Lines 3+ must be given for each time step.
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If you wish cell-by-cell flow terms printed or saved to disk for this time step, set ICBCFL < > 0. However, this alone will not cause the cell-by-cell flow terms to be printed or saved. You must also properly set up the input files for each of the other packages.
One copy of Line 2 followed by 0, 1, or NLAY copies of Lines 3+ must be given for each time step.
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If you wish to print heads for this layer, set if Hdpr < > 0
Lines 3+, (May occur 0, 1, or NLAY times per time step depending on INCODE)
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If you wish to print drawdowns for this layer, set if Ddpr < > 0
Lines 3+, (May occur 0, 1, or NLAY times per time step depending on INCODE)
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If you wish to save heads to disk for this layer, set if Hdsv < > 0
Lines 3+, (May occur 0, 1, or NLAY times per time step depending on INCODE)
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If you wish to save drawdowns to disk for this layer, set if Ddsv < > 0
Lines 3+, (May occur 0, 1, or NLAY times per time step depending on INCODE)
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Lines 2 and 3+ are repeated for each time step. For each time step you need to have one copy of Line 2. That is followed by the appropriate number of lines for Lines 3+ depending on the value of INCODE.
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©1995,1996 Richard B. Winston,
rwinsto@lsuvm.sncc.lsu.edu
Dept. of Geology and Geophysics
Louisiana State University
Baton Rouge, La 70803
U.S.A.
504-388-2337
Fax 504-388-2302
http://scribe.geol.lsu.edu/rbwinston.html
ftp://aapg.geol.lsu.edu/pub/winston