I am new to stormwater and been told that peak flow rates for 24 hour storms are always higher wtih the SCS method. I am reviewing a submission which uses both methods for predevelopment. The SCS method shows lower peak flows for the 2, 5 and 10 year storms than the rational method. However, the SCS method show higher peak flows for the 25, 50 and 100 year storms than the rational method.
Is this possible and how? I checked all the obvious things the C # the CN # and TC and do not see anything wrong.
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