The CTP: GWE Constant Temperature Package pane is on the MODFLOW Features tab of the Object Properties dialog box.
The data that can be specified for the CTP package are the Starting time, Ending time, Specified Temperature Active, Specified Temperature, Specified Temperature Multiplier and the Chemical Species. However the species will always be set to "Temperature."
The Specified Temperature is the specified temperature at the selected cells for the selected Chemical Species (which is always set to "Temperature").
"Specified Temperature Active" can be used to turn on or off a CTP boundary. If the formula for Specified Temperature Active evaluates to True, a specified temperature boundary will be defined. If it evaluates to False, a specified temperature boundary will not be defined. This can be used to turn on or off specified temperature boundaries at different locations based on a criterion specified by the user. Such a capability can be useful for specifying tidal boundaries where some locations may be alternately flooded or exposed.
Specified Temperature Multiplier is only used if it has been activated in the CTP: GWE Constant Temperature Package. If Specified Temperature Multiplier is specified, the temperature is multiplied by the Specified Temperature Multiplier value.
Starting time and Ending time are explained in the help for the MODFLOW Features tab.
