Manning Equations and Formulas Calculator

Fluid Mechanics Hydraulics


Solving For Flow Velocity.

Flow Velocity

Inputs:

hydraulic radius (R)
energy grade line slope (S)
roughness coefficient (n)


Conversions:

hydraulic radius (R)
= 0
= 0
foot
energy grade line slope (S)
= 0
= 0
roughness coefficient (n)
= 0
= 0


Solution:

flow velocity (V)
= HAS NOT BEEN CALCULATED


Other Units:



Change Equation
Select an equation to solve for a different unknown

flow velocity Solve for flow velocity
hydraulic radius Solve for hydraulic radius
energy grade line slope Solve for energy grade line slope
roughness coefficient Solve for roughness coefficient

Where
V  =  flow velocity
R  =  hydraulic radius 
s  =  energy grade line slope 
n  =  coefficient of roughness 


References - Books:

1) Warren Viessman, Jr, Mark J. Hammer. 1993. Water Supply and Pollution Control. Harper Collins College Publishers. 5th ed.

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