## Tutorial 1 Recharge Periods

To view the
recharge periods window, select "Recharge Period
Window" from the "Show" menu. The window will also be
displayed if "Boundary Conditions" is
selected from the
"Active Data" selector.

There are 2 recharge periods for the example simulation, the first
lasting 0.1 day and the second lasting 10 days.
Aside from boundary conditions all other parameters for the
2 recharge periods are identical. The initial time step size
is 0.0001 day. The time step size will be increased for each
successive step by a factor of 1.2 until a maximum step size of
1 day is reached. If convergence of the solver is not attained,
the time step size will be reduced by a factor of 0.1. The maximum
allowed change in head is 10 m. Steady state will only be assumed
when there is no change in computed heads between adjacent time steps.
If the applied infiltration rate exceeds the ability of the soil
to imbibe water, then ponding will occur in the simulation with
the elevation of ponded water being equal to that of land surface.

Next step: Boundary Conditions

Previous step: Initial Temperature

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