Default Input File

This file ('default.btb') is stored in the bathtub program directory (typically:  c:/program files/bathtub ) and read when the program starts up.   

It supplies default values for model options and model coefficients  that are used when a new case is started or when the user clicks the 'Defaults' button on the corresponding edit screens.

To change the default file, edit the input values for any case and save it as 'default.btb' in the program directory where the bathtub software is installed.

A backup copy of the default input file "default_backup.btb" is provided with the program.  If the "default.btb" file is corrupted or lost, the backup file can be read into the program and saved as the default file in the main program directory.

The default case distributed with Vertion 6.X represents a relatively simple application (3 segments in series, total P budgets only (ortho P & nitrogen ignored)).   More complex examples are represented in the sample cases.