Head discharge tables define the behaviour of some controls by listing the discharge from the control at varying head levels. Head discharge tables are required for:
- Some types of Pump (Rotodynamic pumps, Variable Frequency Drive pumps and Archimedean screw pumps)
- User Defined Controls (Compound weirs/orifices and Vortex controls)
- Nodes of Flood type Gully 2D
- Nodes of Flood type Inlet and Inlet Input Type HeadD
Mechanical power can also be defined in the table. Mechanical power only applies to Rotodynamic and Variable Frequency Drive pumps, for which the values can be used to analyse the efficiency of the pump.
Linear interpolation is used between given values. Linear extrapolation is used outside the given range.