Initial Set Up

1.Start ModelMuse as before and create a new PHAST model. In the Initial Grid dialog box, set the number of nodes in the X, Y, and Z directions to be 16, 9, and 5 respectively. Set the distance between nodes in the X, Y, and Z directions to be 6000, 6000, and 100 respectively. Click the Finish button to close the dialog box.

2.In the main ModelMuse window select Model|PHAST Title and Units… Copy the title from ex4.trans.dat to the clipboard and paste it in the title section. Assign the following units. Then click the OK button.

Option	Units
Time units	years
Horizontal grid units	meters
Vertical grid units	meters
Head units	meters
Hydraulic conductivity units	meters per second
Specific storage units	1/meters
Dispersivity units	meters
Flux units	meters per year
Leaky hydraulic conductivity units	meters per second
Leaky thickness units	meters
Well diameter units	inches
Well flow rate units	liters/day
River bed hydraulic conductivity units	meters per second
River bed thickness units	meters

3.The next step is to activate the chemistry options. Select Model|PHAST Chemistry Options… Check the Use solute transport checkbox. Uncheck the Use gas phases, Use solid solution, and Use kinetics checkboxes. Click the OK button.

4.Set the Steady Flow options by selecting Model|PHAST Steady Flow… and checking the Steady flow checkbox. Change the Head tolerance to 1E-6 and click the OK button.

5.Select Model|PHAST Free Surface… and check the Use free surface checkbox. Click the OK button to close the dialog box.