Inlet (Water Overlay)

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Inlets are hydraulic structures that can pump water in to the hydrological model, or out of, in which case they function as Outlets. It will add or remove water at a defined maximum rate, with optional thresholds for the amount of water to add or remove.

Waterwizard icon inlet.png An Inlet is by default a point-based building, but can optionally be an area-based building.


  • Most Inlet attributes function as a limit to the flow. If multiple are defined, the flow is limited by the strongest limit. If neither an INLET_Q or any threshold is defined, there will be no flow.
  • A negative INLET_Q changes the Inlet to an Outlet.
  • The lower and upper thresholds can be seen as a the lowest and highest of "range" of valid water levels. If the actual water level does not fall in the specified range, the Inlet will allow water to flow in or out (depending on the configuration) to correct the water level.
  • A Pump is different from an Inlet in that a pump has two endpoints (or areas) within the project areas, whereas an Inlet has an end point (or area) within the project area and an endpoint (or area) outside the project area; a conceptual external area with a size and a water level.


See also