User's guide of Proceessing Modflow 5.0
User's guide of Proceessing Modflow 5.0
User's guide of Proceessing Modflow 5.0
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220 Processing <strong>Modflow</strong><br />
< To run the flow simulation<br />
1. Select Models < MODFLOW < Run...<br />
2. Click OK to accept the warning regarding the Effective Porosity in the Processing<br />
Modlflow dialog box.<br />
3. Click OK in the Run <strong>Modflow</strong> dialog box to generate the required data files and to run<br />
MODFLOW, you will see a DOS window open and MODFLOW perform the iterations<br />
required to complete the flow simulation.<br />
4. Press any key to exit the DOS Window.<br />
Step 6: Extract and view results from the steady-state flow simulation<br />
It is now time to view the results <strong>of</strong> your labours, but firstly it is necessary to understand how<br />
the Results Extractor operates.<br />
On occasions it is necessary to view some <strong>of</strong> the various sorts <strong>of</strong> output such as hydraulic<br />
heads and cell-by-cell flows generated by a MODFLOW simulation. This 2D data is accessed<br />
using the Results Extractor and saved in ASCII format on the computer’s hard drive for use in<br />
other parts <strong>of</strong> PMWIN or in other programs such as SURFER or a spreadsheet program. It is<br />
quite a simple procedure to load and save any <strong>of</strong> the output generated by MODFLOW and in<br />
fact is a necessary first step in producing any form <strong>of</strong> graphical output from your MODFLOW<br />
simulations. The data files saved in the Results Extractor can be read back into the model<br />
using the Data Editor, this procedure will be explained shortly.<br />
< To load the head distribution after the steady state simulation<br />
1. Select Tools < Results Extractor…<br />
You will see the Results Extractor dialog box which looks a little like a spreadsheet type<br />
window. In the Results Type box at the top <strong>of</strong> the dialog box it is possible to choose the<br />
sort <strong>of</strong> data you wish to load, whilst the Stress Period, Time Step and Layer boxes allow<br />
you to select the layer and time <strong>of</strong> the results loaded. If you choose the other tabs (MOC3D,<br />
MT3D, MT3DMS), you are presented with another choice as to which set <strong>of</strong> concentration<br />
terms you would like to load. At the moment however we are only concerned with the<br />
hydraulic head distribution.<br />
2. Ensure Hydraulic Head are selected in the Results Type box.<br />
3. Click the mouse button on Read, the hydraulic head values for the steady state solution<br />
will appear in the spreadsheet.<br />
4. We will need to view this data graphically and to use it as the starting heads for the<br />
transient simulation so choose Save…<br />
6.1.1 Tutorial 1 - Unconfined Aquifer System with Recharge
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