Pre 2014 Blogs

Calculate runoff depth of a subbasin

Hi all,

I am trying to calculate runoff depth for a subbasin from the subbasin peak flow ( collected from SWMM model)by inverting the manning's equation ( as SWMM uses manning's equation for the calculation of peak flow) . In that case, what should be the slope value? For example if the slope of that subbasin is 5%, should I give 5 in the manning's equation or 0.05? Thanks.

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