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Area inflows can be applied to the system using the Area Inflow type.



An area can be entered directly or calculated automatically from the polygon drawn on the Plan. 

Volumetric Runoff Coefficient

Used to factor the runoff when the Time Area Diagram or Time of Concentration Runoff Methods are selected. 

Runoff Method

The preferred runoff methods can be selected - select from the methods below for details and required input parameters.

Time of Concentration


Santa Barbara Urban Hydrograph


Time Area Diagram

FSR Unit Hydrograph

FEH Unit Hydrograph

ReFH Unit Hydrograph

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Workflow - What's next...?

Connections  Inflows to your Catchment Area, specify  Inlets or Outlets Outlets Outlets or connect to another Stormwater Control or Junctions.