Talbot's Formula

Talbots Formula

Talbot's Formula
a = C * A3/4
  • a = Required section of waterway in square feet
  • A = Drainage area in acres
  • C = Talbot's coefficient
Input Data:
Drainage Area = Ac.
Talbot's Coefficient =
Results:
Waterway Area = ft²
Pipe Size = in.

Talbot's Coefficient

 MountainousHilly LandRolling LandFlat Land
C = 1.00 0.800.60 0.500.40 0.300.20


Pipe Areas

Pipe SizePipe Area