EXG-GWTGWT
Structure of Blocks
FOR EACH SIMULATION
BEGIN OPTIONS
GWFMODELNAME1 <gwfmodelname1>
GWFMODELNAME2 <gwfmodelname2>
[AUXILIARY <auxiliary(naux)>]
[BOUNDNAMES]
[PRINT_INPUT]
[PRINT_FLOWS]
[SAVE_FLOWS]
[ADV_SCHEME <adv_scheme>]
[DSP_XT3D_OFF]
[DSP_XT3D_RHS]
[MVT6 FILEIN <mvt6_filename>]
[OBS6 FILEIN <obs6_filename>]
END OPTIONS
BEGIN DIMENSIONS
NEXG <nexg>
END DIMENSIONS
BEGIN EXCHANGEDATA
<cellidm1> <cellidm2> <ihc> <cl1> <cl2> <hwva> [<aux(naux)>] [<boundname>]
<cellidm1> <cellidm2> <ihc> <cl1> <cl2> <hwva> [<aux(naux)>] [<boundname>]
...
END EXCHANGEDATA
Explanation of Variables
Block: OPTIONS
gwfmodelname1keyword to specify name of first corresponding GWF Model. In the simulation name file, the GWT6-GWT6 entry contains names for GWT Models (exgmnamea and exgmnameb). The GWT Model with the name exgmnamea must correspond to the GWF Model with the name gwfmodelname1.gwfmodelname2keyword to specify name of second corresponding GWF Model. In the simulation name file, the GWT6-GWT6 entry contains names for GWT Models (exgmnamea and exgmnameb). The GWT Model with the name exgmnameb must correspond to the GWF Model with the name gwfmodelname2.auxiliaryan array of auxiliary variable names. There is no limit on the number of auxiliary variables that can be provided. Most auxiliary variables will not be used by the GWT-GWT Exchange, but they will be available for use by other parts of the program. If an auxiliary variable with the name “ANGLDEGX” is found, then this information will be used as the angle (provided in degrees) between the connection face normal and the x axis, where a value of zero indicates that a normal vector points directly along the positive x axis. The connection face normal is a normal vector on the cell face shared between the cell in model 1 and the cell in model 2 pointing away from the model 1 cell. Additional information on “ANGLDEGX” is provided in the description of the DISU Package. ANGLDEGX must be specified if dispersion is simulated in the connected GWT models.BOUNDNAMESkeyword to indicate that boundary names may be provided with the list of GWT Exchange cells.PRINT_INPUTkeyword to indicate that the list of exchange entries will be echoed to the listing file immediately after it is read.PRINT_FLOWSkeyword to indicate that the list of exchange flow rates will be printed to the listing file for every stress period in which “SAVE BUDGET” is specified in Output Control.SAVE_FLOWSkeyword to indicate that cell-by-cell flow terms will be written to the budget file for each model provided that the Output Control for the models are set up with the “BUDGET SAVE FILE” option.adv_schemescheme used to solve the advection term. Can be upstream, central, or TVD. If not specified, upstream weighting is the default weighting scheme.DSP_XT3D_OFFdeactivate the xt3d method for the dispersive flux and use the faster and less accurate approximation for this exchange.DSP_XT3D_RHSadd xt3d dispersion terms to right-hand side, when possible, for this exchange.FILEINkeyword to specify that an input filename is expected next.MVT6keyword to specify that record corresponds to a transport mover file.mvt6_filenameis the file name of the transport mover input file to apply to this exchange. Information for the transport mover are provided in the file provided with these keywords.OBS6keyword to specify that record corresponds to an observations file.obs6_filenameis the file name of the observations input file for this exchange. See the “Observation utility” section for instructions for preparing observation input files. Table ref{table:gwt-obstypetable} lists observation type(s) supported by the GWT-GWT package.
Block: DIMENSIONS
nexgkeyword and integer value specifying the number of GWT-GWT exchanges.
Block: EXCHANGEDATA
cellidm1is the cellid of the cell in model 1 as specified in the simulation name file. For a structured grid that uses the DIS input file, CELLIDM1 is the layer, row, and column numbers of the cell. For a grid that uses the DISV input file, CELLIDM1 is the layer number and CELL2D number for the two cells. If the model uses the unstructured discretization (DISU) input file, then CELLIDM1 is the node number for the cell.cellidm2is the cellid of the cell in model 2 as specified in the simulation name file. For a structured grid that uses the DIS input file, CELLIDM2 is the layer, row, and column numbers of the cell. For a grid that uses the DISV input file, CELLIDM2 is the layer number and CELL2D number for the two cells. If the model uses the unstructured discretization (DISU) input file, then CELLIDM2 is the node number for the cell.ihcis an integer flag indicating the direction between node n and all of its m connections. If IHC = 0 then the connection is vertical. If IHC = 1 then the connection is horizontal. If IHC = 2 then the connection is horizontal for a vertically staggered grid.cl1is the distance between the center of cell 1 and the its shared face with cell 2.cl2is the distance between the center of cell 2 and the its shared face with cell 1.hwvais the horizontal width of the flow connection between cell 1 and cell 2 if IHC > 0, or it is the area perpendicular to flow of the vertical connection between cell 1 and cell 2 if IHC = 0.auxrepresents the values of the auxiliary variables for each GWTGWT Exchange. The values of auxiliary variables must be present for each exchange. The values must be specified in the order of the auxiliary variables specified in the OPTIONS block.boundnamename of the GWT Exchange cell. BOUNDNAME is an ASCII character variable that can contain as many as 40 characters. If BOUNDNAME contains spaces in it, then the entire name must be enclosed within single quotes.
Example Input File
BEGIN OPTIONS
PRINT_INPUT
PRINT_FLOWS
SAVE_FLOWS
AUXILIARY testaux
END OPTIONS
BEGIN DIMENSIONS
NEXG 36
END DIMENSIONS
# nodem1 nodem2 ihc cl1 cl2 fahl testaux
BEGIN EXCHANGEDATA
#
# left side
16 1 1 50. 16.67 33.33 100.99
16 10 1 50. 16.67 33.33 100.99
16 19 1 50. 16.67 33.33 100.99
23 28 1 50. 16.67 33.33 100.99
23 37 1 50. 16.67 33.33 100.99
23 46 1 50. 16.67 33.33 100.99
30 55 1 50. 16.67 33.33 100.99
30 64 1 50. 16.67 33.33 100.99
30 73 1 50. 16.67 33.33 100.99
#
# right side
20 9 1 50. 16.67 33.33 100.99
20 18 1 50. 16.67 33.33 100.99
20 27 1 50. 16.67 33.33 100.99
27 36 1 50. 16.67 33.33 100.99
27 45 1 50. 16.67 33.33 100.99
27 54 1 50. 16.67 33.33 100.99
34 63 1 50. 16.67 33.33 100.99
34 72 1 50. 16.67 33.33 100.99
34 81 1 50. 16.67 33.33 100.99
#
# back
10 1 1 50. 17.67 33.33 100.99
10 2 1 50. 17.67 33.33 100.99
10 3 1 50. 17.67 33.33 100.99
11 4 1 50. 17.67 33.33 100.99
11 5 1 50. 17.67 33.33 100.99
11 6 1 50. 17.67 33.33 100.99
12 7 1 50. 17.67 33.33 100.99
12 8 1 50. 17.67 33.33 100.99
12 9 1 50. 17.67 33.33 100.99
#
# front
38 73 1 50. 17.67 33.33 100.99
38 74 1 50. 17.67 33.33 100.99
38 75 1 50. 17.67 33.33 100.99
39 76 1 50. 17.67 33.33 100.99
39 77 1 50. 17.67 33.33 100.99
39 78 1 50. 17.67 33.33 100.99
40 79 1 50. 17.67 33.33 100.99
40 80 1 50. 17.67 33.33 100.99
40 81 1 50. 17.67 33.33 100.99
END EXCHANGEDATA
Example Observation Input File
BEGIN OPTIONS
DIGITS 10
PRINT_INPUT
END OPTIONS
# Block defining continuous observations
BEGIN CONTINUOUS FILEOUT simulation.obs.csv
# obsname obstype id or boundname
exg1 flow-ja-face 1
left-face flow-ja-face bnameleft
right-face flow-ja-face bnameright
END CONTINUOUS