SUTRA Features Tab

The SUTRA Features tab is on the Object Properties dialog box.

The SUTRA Features tab is only visible if a SUTRA model is active. On the left side of the tab is a list of boundary conditions, and observations that can be specified with the object or objects that are being edited. When the user selects one of the list of features on the left, a pane in which the data for the feature are specified will appear on the right.

There is a checkbox next to each feature in the list. The checkbox can be in three states: checked, unchecked and indeterminate. If the checkbox is checked, all of the objects that are being edited define input for the feature. If the checkbox is unchecked, none of the objects that are being edited define input for the feature. If the checkbox is indeterminate, some of the objects that are being edited define input for the feature and some do not.

For objects evaluated at elements, only Observations will be listed on the left. For objects evaluated at nodes, there will be additional items listed:

•Specified Head or Specified Pressure,

•Specified Concentration or Specified Pressure,

•Fluid Flux, and

•Mass Flux or Energy Flux.

•Sutra State Calibration Observations

For SUTRA 3.0 models, the following additional panes will be present for objects evaluated at nodes.

•Lake (Lakes can only be defined on the top view of 3D models.)

•Generalized Flow Pane

•Generalized Transport Pane

If PEST is activated, there are also two additional panes.

•Sutra State Calibration Observations

•SUTRA Boundary Observations

The Time Units Converter dialog box can be used to convert values specified in a unit different from that used in the model to values in the time units specified in the model. Click the Convert time units button to display the Time Units Converter dialog box.

For many time-dependant model features, the table in which the time dependant properties are specified will have two rows before the time-dependant values. They are used to specify the PEST Modifier and the Modification method. The PEST modifier is the name of a PEST parameter or a data set whose values will be assigned using PEST parameters. The modification method is either Add or Multiply. If the PEST Modifier is specified, PEST will modify the specified value for each time by either multiply by or adding the PEST modifier value. In addition, for any specific time, if the formula is a PEST parameter name or a data set that is modified by PEST, the updated parameter or data set value will be used by PEST during parameter estimation. If the formula for a specific time involves a data set modified by PEST but is not simply the name of the data set itself, only the initial value of the data set well be used during parameter estimation.