PHAST Free Surface Dialog Box

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The PHAST Free Surface dialog box is used to specify whether or not a free surface (water table) is used in the model. The PHAST Free Surface dialog box is displayed by selecting Model|PHAST Free Surface… If a free surface will be used, the user can check the Use water table for initial condition checkbox to use the water table to define the initial head. If the free surface is used and the water table is used to define the initial head, the Initial_Water_Table data set is used to define the initial head. If a free surface is not used or if the water table is not used to define the initial head, the Initial_Head data set is used to define the head at each node.

Note: The most recent version of PHAST no longer supports specifying an initial water table. However, you can still use the initial water table option in ModelMuse. ModelMuse will use the data in the Initial_Water_Table data set to specify the initial head in a vertical column of nodes.