GMS:MODFLOW Post-Processing Viewing Options: Difference between revisions
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{{MODFLOW Links}} | {{MODFLOW Links}} | ||
In addition to generating and editing the MODFLOW input files, GMS can also be used for post-processing the solution files computed by MODFLOW. The solution files computed by MODFLOW include head, drawdown, and CCF files. By default, the head and CCF files are automatically generated. The output options are controlled in the MODFLOW [[GMS:Output Control|Output Control dialog]]. | In addition to generating and editing the MODFLOW input files, GMS can also be used for post-processing the solution files computed by MODFLOW. The solution files computed by MODFLOW include head, drawdown, and CCF files. By default, the head and CCF files are automatically generated. The output options are controlled in the MODFLOW [[GMS:Output Control|''Output Control'' dialog]]. | ||
==No-Flow and Dry Cells== | ==No-Flow and Dry Cells== | ||
When a MODFLOW simulation is solved, MODFLOW writes out a head or drawdown value for every cell of the finite difference grid to the solution files. However, some of the cells are either outside the problem domain or they have gone dry during the course of the simulation. These cells are flagged by MODFLOW in the output file by writing special values for the cells. The value assigned to inactive cells is the No flow head value specified in the [[GMS:Global Options/Basic Package|Global Options/Basic Package dialog]]. The value assigned to cells which have gone dry is the Head assigned to dry cells value defined in the [[GMS:BCF Package|BCF]], [[GMS:LPF Package|LPF]] or [[GMS:HUF Package|HUF]] package dialogs. If the MODFLOW data are in memory when the solution is read in, GMS will automatically use the No flow head and Head assigned to dry cells values to define active/inactive cells for post-processing. | When a MODFLOW simulation is solved, MODFLOW writes out a head or drawdown value for every cell of the finite difference grid to the solution files. However, some of the cells are either outside the problem domain or they have gone dry during the course of the simulation. These cells are flagged by MODFLOW in the output file by writing special values for the cells. The value assigned to inactive cells is the No flow head value specified in the [[GMS:Global Options/Basic Package|''Global Options/Basic Package'' dialog]]. The value assigned to cells which have gone dry is the Head assigned to dry cells value defined in the [[GMS:BCF Package|BCF]], [[GMS:LPF Package|LPF]] or [[GMS:HUF Package|HUF]] package dialogs. If the MODFLOW data are in memory when the solution is read in, GMS will automatically use the No flow head and Head assigned to dry cells values to define active/inactive cells for post-processing. | ||
==Layer Contours== | ==Layer Contours== | ||
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=====Flow Budget for Selected Cells===== | =====Flow Budget for Selected Cells===== | ||
If a MODFLOW model is built without using the conceptual model approach (directly from the grid), the computed fluxes corresponding to a user-defined set of cells can still be displayed. This is accomplished by selecting a set of cells and selecting the '''Flow Budget''' command from the | If a MODFLOW model is built without using the conceptual model approach (directly from the grid), the computed fluxes corresponding to a user-defined set of cells can still be displayed. This is accomplished by selecting a set of cells and selecting the '''''Flow Budget''''' command from the ''Data'' menu in the 3D Grid module. This command brings up the ''Flow Budget'' dialog. This dialog lists the complete flow budget for the selected cells. | ||
GMS also includes a [[GMS:Zone Budget|Zone Budget tool]] to view the computed flows into (out of) user defined zones. | GMS also includes a [[GMS:Zone Budget|'''Zone Budget''' tool]] to view the computed flows into (out of) user defined zones. | ||
==Vector Plots== | ==Vector Plots== | ||
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{{Version GMS 8.2}} | {{Version GMS 8.2}} | ||
Vectors are generated by right-clicking on the CCF file in the Project Explorer and selecting the '''CCF->Velocity Vectors''' command. The cell top and bottom elevations as well as the porosity are used when calculating the velocity vectors. Therefore, for GMS to compute the vectors, a MODFLOW simulation must exist in GMS. Although porosity is not an input to a MODFLOW model, the porosity can be specified per cell, using the cell properties dialog, whenever a MODFLOW simulation exists. | Vectors are generated by right-clicking on the CCF file in the Project Explorer and selecting the '''''CCF->Velocity Vectors''''' command. The cell top and bottom elevations as well as the porosity are used when calculating the velocity vectors. Therefore, for GMS to compute the vectors, a MODFLOW simulation must exist in GMS. Although porosity is not an input to a MODFLOW model, the porosity can be specified per cell, using the cell properties dialog, whenever a MODFLOW simulation exists. | ||
The vectors are computed by reading the CCF file to get the net flow through each grid cell face. Each component of the velocity vector is computed by dividing the flow through the cell face by the saturated area of the face multiplied by the porosity. For example, the I, J, K direction components of the vector are calculated as follows: | The vectors are computed by reading the CCF file to get the net flow through each grid cell face. Each component of the velocity vector is computed by dividing the flow through the cell face by the saturated area of the face multiplied by the porosity. For example, the I, J, K direction components of the vector are calculated as follows: | ||
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'''Prior to version 8.2.''' | '''Prior to version 8.2.''' | ||
To generate a vector data set from the CCF file, right click on the CCF data set in the Data Tree and select the '''Generate vectors''' option from the pop up menu. A flow vector is generated at each cell center by computing a vector sum of the flows through the six walls of the cell. The resulting vectors can be plotted by selecting the [[GMS:Vectors|Vectors]] option in the [[GMS:3D Grid Module|3D Grid Display Options]] dialog. | To generate a vector data set from the CCF file, right click on the CCF data set in the Data Tree and select the '''Generate vectors''' option from the pop up menu. A flow vector is generated at each cell center by computing a vector sum of the flows through the six walls of the cell. The resulting vectors can be plotted by selecting the [[GMS:Vectors|Vectors]] option in the [[GMS:3D Grid Module|''3D Grid Display'' Options]] dialog. | ||
==Viewing the Printed Output File== | ==Viewing the Printed Output File== | ||
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#When a solution is read into GMS, the text output files are placed into the data tree. Double clicking on their file icons in the [[GMS:Project Explorer|Project Explorer]] will bring up the text files in a text editor. | #When a solution is read into GMS, the text output files are placed into the data tree. Double clicking on their file icons in the [[GMS:Project Explorer|Project Explorer]] will bring up the text files in a text editor. | ||
#Any text file can be viewed by selecting the '''''Edit File''''' command in the | #Any text file can be viewed by selecting the '''''Edit File''''' command in the ''File'' menu. A File Browser appears and the selected file is opened in a text editor. | ||
{{Navbox GMS}} | {{Navbox GMS}} | ||
[[Category:MODFLOW]] | [[Category:MODFLOW]] | ||
