- variable
Name of the physical variable: "volume".
- polygon
Boxid starting from 0 to numboxes - 1.
- layer
Layerid starting from 0 to numlayers - 1.
- time
Simulation time in years. Modeltimestep was converted to actual
time based on the settings in the 'run.prm' file.
- atoutput
Obseravtion column storing the actual output value.
Volume in m^3