Question
How do time-series or power files (.pow) in FEFLOW look like?
Answer
To implement time-varying data within FEFLOW you need to create a time-series file with a specific format! Power files are an ASCII-based text format with two columns, one with time steps and the other with parameter values.
You have 2 options:
Option #1 - Generate a .POW file in ASCII format
In Excel you can arrange your time-stepping and your parameter data (e.g. measured hydraulic heads) in two columns and save it as an ASCII based text file (.txt). The file should be organized as follows, where x-values correspond to time and y-values to the variable being stored. The second and third line start with an exclamation mark and are reserved for comments. Time-steps and data starts in line 4. Please note that time-steps need to be given in numeric format and NOT in some sort of date format (e.g. 2024-03-01). You can combine several time-series by appending them to each other.
# ID1
! Comment line for time series 1
! ...
x1 y1
x2 y2
...
xm ym
END
# ID2
! Comment line for time series 2
! ...
x1 y1
x2 y2
...
xn yn
END
# IDn
! Comment line for time series n
! ...
x1 y1
x2 y2
...
xo yo
END
END
The last time-series is closed with a double END tag. Once the columns are completed, one may save the file and change the extension from .txt to .pow .
Option #02 - Copy-paste Time Series Editor
Alternatively, one can copy a time-series from the Time Series Editor, and edit, duplicate and paste it easily between FEFLOW and Excel.
FURTHER INFORMATION & USEFUL LINKS
Manuals and Guidelines
FEFLOW 8.1 Documentation - Time Series Editor