ODOT Table of Runoff Coefficients Tables from Oregon Hydraulics Manual
TxDOT Table for Runoff Coefficients Tables from Texas Hydraulic Design Manual
Estimates peak discharge in US customary units from
Q_p = (1.008)*C*I*A
where:
Q_p is peak discharge in CFS
C is the runoff coefficient (read from table)
I is rainfall intensity in inches/hour
A is drainage area in acres