# HydroGeoSphere/Interpolation

Time-varying boundary conditions change abruptly from value **bc_val(i)** to value **bc_val(i+1)** at time **bc_time(i+1)**. To have **HydroGeoSphere** use linear interpolation to smooth the values used between time panel endpoints use:

## Interpolate

editThis command causes time-varying values to be interpolated between panel values for the boundary condition currently being defined. This results in a smoother application of the time-varying function.

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