Mithila Muthamma PA
Coorg Institute of Technology (CIT), Coorg
Mithila Muthamma PA has created this Calculator and 500+ more calculators!
Chandana P Dev
NSS College of Engineering (NSSCE), Palakkad
Chandana P Dev has verified this Calculator and 500+ more calculators!

2 Other formulas that you can solve using the same Inputs

Watershed Area when Shape factor is known
Watershed Area=(Watershed Length^2)/Shape Factor GO
Shape Factor
Shape Factor=(Watershed Length)^2/Catchment Area GO

2 Other formulas that calculate the same Output

Form factor when Width of the Basin is given
Form factor=Width of Basin/Basin Aerial Length GO
Form factor when Shape factor is given
Form factor=1/Shape Factor GO

Form Factor Formula

Form factor=Watershed Area/Watershed Length^2
C<sub>f</sub>=A/L^2
More formulas
Drainage Density GO
Length of all Streams when Drainage Density Given GO
Catchment Area when Drainage density is known GO
Stream Density GO
Number of Streams when Stream Density is Known GO
Catchment Area when Stream Density is known GO
Length of Overland Flow GO
Shape Factor GO
Watershed Length when Shape Factor is known GO
Watershed Area when Shape factor is known GO
Form factor when Width of the Basin is given GO
Form factor when Shape factor is given GO

What is Form factor in Hydrology?

Form factor is defined as the ratio of basin area to square of the basin length. The value of form factor would always be less than 0.754 (for a perfectly circular watershed). Smaller the value of form factor, more elongated will be the watershed.

How to Calculate Form Factor?

Form Factor calculator uses Form factor=Watershed Area/Watershed Length^2 to calculate the Form factor, The Form Factor formula is defined as the ratio of basin area to square of the basin length. The value of form factor would always be less than 0.754 (for a perfectly circular watershed). Form factor and is denoted by Cf symbol.

How to calculate Form Factor using this online calculator? To use this online calculator for Form Factor, enter Watershed Area (A) and Watershed Length (L) and hit the calculate button. Here is how the Form Factor calculation can be explained with given input values -> 0.008 = 20/50^2.

FAQ

What is Form Factor?
The Form Factor formula is defined as the ratio of basin area to square of the basin length. The value of form factor would always be less than 0.754 (for a perfectly circular watershed) and is represented as Cf=A/L^2 or Form factor=Watershed Area/Watershed Length^2. Watershed Area is an isolated area with a well demarcated boundary line, draining the rainwater to a single outlet and Watershed Length is distance from outlet to watershed boundary along main channel.
How to calculate Form Factor?
The Form Factor formula is defined as the ratio of basin area to square of the basin length. The value of form factor would always be less than 0.754 (for a perfectly circular watershed) is calculated using Form factor=Watershed Area/Watershed Length^2. To calculate Form Factor, you need Watershed Area (A) and Watershed Length (L). With our tool, you need to enter the respective value for Watershed Area and Watershed Length and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Form factor?
In this formula, Form factor uses Watershed Area and Watershed Length. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • Form factor=Width of Basin/Basin Aerial Length
  • Form factor=1/Shape Factor
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