User's guide of Proceessing Modflow 5.0

224 Processing Modflow
are entering data for stress period 2.
5. For each well in the system set the pumping rate to 0 (this is the default value).
6. Exit the Data Editor by File < Leave Editor, which again brings up the Temporal Data
dialog box.
7. Exit the Temporal Data dialog box and the Data Editor by Leave Editor < Yes
Recharge rates
There are two recharge periods, namely the dry season when recharge is zero and the wet season
-4
when recharge is 7.5 × 10 m/day.
< To specify the recharge rate
1. Select Models < MODFLOW < Recharge < Edit
2. Set the entire grid to a uniform value for the first Stress Period by Value < Reset Matrix...
3. In the Reset Matrix dialog box enter,
Recharge Flux [L/T] = 0.0
Layer Indicator [IRCH]= 0
Recharge Options: Recharge is applied to the highest active cell
4. Click OK to exit the dialog box.
5. Leave the Data Editor by File < Leave Editor, which brings up the Temporal Data dialog
box.
6. Select Period 2 and click on Edit Data to edit the data for that period.
7. Using the above procedure change the recharge flux for the entire grid to 0.00075 (the other
values remain the same).
8. Exit the Data Editor by File < Leave Editor, which again brings up the Temporal Data
dialog box.
C Exit the Temporal Data dialog box and the Data Editor by Leave Editor < Yes
Specific Yield
Before running the transient simulation it is necessary to set the aquifer specific yield to 0.06.
< To specify the specific yield
1. Select Parameters < Specific Yield
2. Set the entire grid to 0.06 and exit the Data Editor by File < Leave Editor < Yes
6.1.1 Tutorial 1 - Unconfined Aquifer System with Recharge