SWMM56

Note:   The  total   flow  from a  Subcatchment  is the sum of the  flow  from the impervious area with and without depression storage and the pervious area with depression strorage.  The same width, slope but different roughness applies to the impervious and pervious portions of the  subcatchment .  

Note: The total flow from a Subcatchment is the sum of the flow from the impervious area with and without depression storage and the pervious area with depression strorage. The same width, slope but different roughness applies to the impervious and pervious portions of the subcatchment.