User's guide of Proceessing Modflow 5.0

Processing Modflow 47
Note that PMWIN does not retrieve the optimized parameter values into the data matrices.
Your (PMWIN-) model data will not be modified in any way. This provides more security for
the model data, because an automatic calibration process does not necessarily lead to a success.
If you want to operate on a calibrated model, you can import the model by choosing Convert
Model... from the File menu, see Chapter 3 for details.
You can create a scatter diagram to present the calibration result. The observed head values
are plotted on one axis against the corresponding calculated values on the other. If there is exact
agreement between measurement and simulation, all points lie on a 45° line. The narrower the
area of scatter around this line, the better is the match.
< To create a scatter diagram for head values
1. Choose Graph < Head-Time from the Tools menu.
A Head-Time Curves dialog box appears.
2. Click the button Scatter Diagram »
PMWIN shows the scatter diagram (Fig. 2.39). See Chapter 5 for details about the use of
this dialog box.
Fig. 2.39 The Scatter Diagram dialog box
2.3.1 Perform Automatic Calibration with PEST