Does anyone know which value of Shape Factor SSA uses? In my office, before I joined, Hydraflow was being used where Shape Factor was one of the input values. When I used SSA for my project, it didn't ask for Shape Factor value. So I am not sure if it assumes a particular value.
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Solved! by Matt.Anderson. See the answer in context.
Review Dimenionless Unit Hydrograph. The Standard 484 is pretty typical, but there are other pre-defined values available
Change the Hydrology Engine to TR-20 and review the Dimensionless Unit Hydrograph.
The Standard 484 Shape factor is the SCS Unit Hydrograph.