cvg, The 6 in the rational calculation is to convert the rainfall depth to intensity. I am using an intensity of 6.96 inches per hour intensity of the storm.
The C value calculated for this area is .80 based upon the land use so that actually pushes the numbers further apart so that is not...
I am using Win TR55 to analyze a drainage area. The parameters are as follows:
Area 10.61 Ac,
Weighted CN 87
Tc 0.188 (hr) (100' Sheet flow at 2%, 662' at 28.4% unpaved, 208' at 2.16% Paved and 593 feet channel at 6.589 f/s.
This site is in the Caribbean and the rainfall type is II...