online_dispersivity:  Calculation of convection, diffusion, and dispersion coefficients
of flood wave propagation   

[ SI Units:  uo in m/s; yo in m ]
[ U.S. Units:  uo in fps; yo in ft ]
Reference

F = uo / (g yo)1/2

V = (β - 1) F

qo = uo yo

Lo = yo / So

c = [ 1 + (V / F ) ] uo

ν = (Lo / 2) uo ( 1 - V 2 )

η = (Lo / 2) 2 uo ( 1 - V 2 ) F 2

c' = 1 + (V / F )

ν' = (1/2) ( 1 - V 2 )

η' = (1/4) ( 1 - V 2 ) F 2

F = Froude number;
V = Vedernikov number.

INPUT DATA:

Select:      

Mean velocity uo :      

 

Flow depth yo :      

 

Channel slope So :      

 

Rating exponent β :      

OUTPUT:

SI units (metric)

♦  Froude F :   

♦  Vedernikov V :   

♦  Celerity c :     

♦  Diffusivity ν :     

♦  Dispersivity η :     

♦  Celerity c' :   

♦  Diffusivity ν' :   

♦  Dispersivity η' :   

Press button to
or recalculate

  Your request was processed at  10:51:50 am on October 16th, 2025   [ 251016  10:51:50 ].

Thank you for running   online_dispersivity   Please call again.   [210718]

Documents in Portable Document Format (PDF) require Adobe Acrobat Reader 5.0 or higher to view;
Download Adobe Acrobat Reader.