For a node, the Flow (In) result is all flows from incoming pipes, but does not include local inflow into the node. It is otherwise the same as Flow (Out) since the Gradually Varied Flow calculations have no storage effect.

The following input data will not be used by the GVF-Rational Solver, and user notifications will be generated on compute or validate:

• Roughness Type: If the Roughness Type is a value of Manning's n - Depth Curve or Manning's n -Flow Curve.
• Transition Type: If the Transition Type is Gradual and the Transition Length is greater than zero.