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How to increase initial abstraction in CivilStorm for a given catchment from 0.2S to 0.3S?

Greetings,

I have reasons to adopt a higher initial abstraction in some of my catchments so rather than the 0.2S that would be in default implementation of SCS unit hydrograph method in CivilStorm (it is 0.2S, right?) would like to force a 0.3S? How can i do that?

In addition, can I use Area Reduction Factors in Civil Storm catchment (where/how?) (all modeling is SCS unit hydrograph, SWMM...etc)

thanks