Empirical Formula Used For Determination of Runoff

Empirical Formula Used For Determination of Runoff

The following empirical formulas or equations are generally used for estimating the runoff from a catchment:

1. Dicken’s Formula

Q = C × A3/4

Where,

  • Q = Runoff in cumec.
  • C = a coefficient varies from 11.5 to 25.
  • A = Catchment area in sq. km.

2. Ryve’s Formula

Q = C A2/3

Where,

  • Q = Runoff in cumec
  • C = a coefficient varies from 6.75 to 10
  • A = Catchment area in sq. km.

3. Inglish Formula

[latex]\large Q = \tfrac{123 A}{\sqrt{A + 10.4}}[/latex]

Where,

  • Q = Runoff in cumec.
  • A = Catchment area in sq. km.

4. Dredge or Burge’s Formula

[latex] Q = 19.6\, \frac{A}{L^{2/3}} [/latex]

  • Q = Runoff in cumec.
  • A = Catchment area in sq. km.
  • L = Length of the drainage basin in kilometers.

Read More:

How to Calculate Annual Runoff – Problem & Solution

Burkli Ziegler Formula

How to Calculate Annual Runoff || Problem & Solution ||

Scroll to Top