Computes the equivalent intensity in watershed inches per hour for a given
value of discharge in cubic-feet-per-second (CFS) and a given drainage area
in square feet (FT^2)

To convert acres into square feet multiply acres by 43,560.

Area(ft^2) = Area(acres)*43,460(ft^2/acre)

Calculates watershed inches from:

I = (Q/A)*3600*12

where:

A is drainage area in square feet

Q is discharge in CFS

I is intensity in IN/HR

3600 converts seconds into hours

12 converts feet into inches