User's guide of Proceessing Modflow 5.0

Processing Modflow 305
The unit of time must be consistent for all data values that involve time. For example, if years is
the chosen time unit, stress-period length, timestep length, transmissivity, etc., must all be
expressed using years for their time units. Likewise, the length unit must also be consistent.
ACTIVE A stress period is active, if ACTIVE = -1. Set ACTIVE=0, if a stress period is inactive.
PERLEN is the length of a stress period. It is specified for each stress period.
NSTP is the number of time steps in a stress period.
TSMULT is the multiplier for the length of successive time steps. The length of the first time step DELT(1)
is related to PERLEN, NSTP and TSMULT by the relation
DELT(1) = PERLEN(1-TSMULT)/(1-TSMULT**NSTP).
DT0 is the length of transport steps. If DT0=0, the length of transport steps will be determined by an
automatic stepsize control procedure in MT3D.
MXSTRN is the maximum number of transport steps.
TTSMULT is the multiplier for the length of successive transport steps within a flow time step, if the
Generalized Conjugate Gradient (GCG) solver is used and the solution option for the advection
term is the uptream finite difference method.
Trace File
A Trace file can be saved or loaded by the Search and Modify dialog box (see section 3.3.7).
File Format
1. Data: LABEL
(The following data repeats 50 times, one record for each search range)
3. Data: ACTIVE COLOR MIN MAX VALUE OPTION
Explanation of Fields Used in Input Instructions
ALL DATA IN THE SAME RECORD ARE SEPARATED BY A COMMA OR BLANK.
LABEL is the file label. It must be PMWIN4000_TRACEFILE
ACTIVE a search range (see MIN / MAX below) is active, if ACTIVE = -1
COLOR is the fill color. The color is defined by a long integer using the equation: color = red + green × 256
+ blue × 65536, where red, green and blue are the color components rangeing from 0 to 255.
COLOR is assigned to the finite-difference cells that have a value located within the search range
(see MIN / MAX below).
MIN / MAX define the lower limit and upper limit of the search range.
VALUE According to OPTION (see below), you can easily modify the cell values (see section 3.3.7 for
details.)
OPTION OPTION = 0, Display only.
OPTION = 1, Replace: The cell values are replaced by VALUE.
OPTION = 2, Add: VALUE is added to the cell values.
OPTIOn = 3, Multiply: The cell values are multiplied by VALUE.
Zone file
A zone file can be saved or loaded by the Data Editor by using the item Zones from the Value menu.
File Format
1. Data: LABEL
2. Data: NZONES, XXX, XXX, XXX, XXX
(The following data (data 3-6) repeat NZONES times)
3. Data: NP
4. Data: PARNO
5. Data: Value(1) Value(2) Value(3) ... Value(I) ... Value(16)
(The following data repeats NP times)
6. Data: X(J), Y(J)
Explanation of Fields Used in Input Instructions
ALL DATA IN THE SAME RECORD ARE SEPARATED BY A COMMA OR BLANK.
Appendix 2: Files and Formats