Calculation of minimum Froude number for initiation of motion, Victor Miguel Ponce, San Diego State University

    online_initiation_froude: Calculation of minimum Froude number for initiation of motion

Formula:

F ≥ k d^1/6 (d_s / d)^1/2 n^-1

SI Units (metric): k = 0.082, d in m, and d_s in mm.
U.S. Customary Units: k = 0.067, d in ft, and d_s in mm.

Reference:
http://initiation.sdsu.edu

INPUT DATA:

Select:

Flow depth d :

Particle size d_s :

Manning's friction coefficient n :

OUTPUT:

Froude F ≥

Press button to

or recalculate

Your request was processed at 11:59:04 am on March 12th, 2026   [ 260312  11:59:04 ].

Thank you for running online_initiation_froude Please call again. [120911]