User's guide of Proceessing Modflow 5.0

Processing Modflow 213
Step1: Create a New Model
< To create a new model,
1. Select File < New Model …
2. In the New Model dialog box, change the working folder to \pm5\examples\T1 (create the
foldert, if it does not exist) and enter T1 as the name of the new model to be created.
3. Click OK to exit this dialog box.
Step 2: Define Model Size
< To define the size of the model
1. Select Grid < Mesh Size...
2. In the Model Dimension dialog box enter,
Layers Number 1
Columns Number 12
Size 500
Rows Number 20
Size 500
3. Click OK to exit this dialog box.
You are now in the Grid Editor of the PMWIN. To help visualize the problem we can overlay
a DXF file as a map, which give us the locations of the boundaries and the pumping wells.
< To load a map
1. Select Options < Maps… to open the Map Options dialog box.
2. Click the box beside the space for the DXF filename to activate that particular map (it is
also possible to choose a color by clicking on the colored square.
3. In the first filename field of DXF-files, click the right mouse button to bring up the Map
Files dialog box.
4. Choose BASEMAP1.DXF from the folder \pm5\examples\tutorials\tutorial1\, click OK to
exit the dialog box.
5 Click OK to exit the Map Options dialog box.
Step 3: Refine Model Grid
It is good practice to use a smaller grid in areas where the hydraulic gradient is expected to be
large, in this case it is around the recharge pits. In PMWIN, grid refinement takes place within
6.1.1 Tutorial 1 - Unconfined Aquifer System with Recharge