Manning's Coefficient using Strickler Formula Solution

STEP 0: Pre-Calculation Summary
Formula Used
Manning’s Roughness Coefficient = (Roughness Value^(1/6))/21
n = (Ra^(1/6))/21
This formula uses 2 Variables
Variables Used
Manning’s Roughness Coefficient - Manning’s Roughness Coefficient represents the roughness or friction applied to the flow by the channel.
Roughness Value - (Measured in Meter) - Roughness Value is the arithmetic average of the absolute values of the roughness profile ordinates.
STEP 1: Convert Input(s) to Base Unit
Roughness Value: 0.001 Millimeter --> 1E-06 Meter (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
n = (Ra^(1/6))/21 --> (1E-06^(1/6))/21
Evaluating ... ...
n = 0.00476190476190476
STEP 3: Convert Result to Output's Unit
0.00476190476190476 --> No Conversion Required
FINAL ANSWER
0.00476190476190476 0.004762 <-- Manning’s Roughness Coefficient
(Calculation completed in 00.004 seconds)

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National Institute of Technology Karnataka (NITK), Surathkal
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7 Manning's Formula in Uniform Flow Calculators

Manning's Formula for Hydraulic Radius given Average Velocity
Go Hydraulic Radius of Channel = (Average Velocity of Uniform Flow*Manning’s Roughness Coefficient/sqrt(Bed Slope))^(3/2)
Manning's Formula for Coefficient of Roughness given Average Velocity
Go Manning’s Roughness Coefficient = (1/Average Velocity of Uniform Flow)*(Bed Slope^(1/2))*(Hydraulic Radius of Channel^(2/3))
Manning's Formula for Average Velocity
Go Average Velocity of Uniform Flow = (1/Manning’s Roughness Coefficient)*(Hydraulic Radius of Channel^(2/3))*(Bed Slope^(1/2))
Manning's Formula for Slope of Channel Bed given Average Velocity
Go Bed Slope = (Average Velocity of Uniform Flow*Manning’s Roughness Coefficient/(Hydraulic Radius of Channel^(2/3)))^(2)
Manning's Formula for Hydraulic Radius given Chezy's Constant
Go Hydraulic Radius of Channel = (1/Bed Slope)*(Average Velocity of Flow/Chezy's Constant)^2
Manning's Formula for Roughness Coefficient given Chezy's Constant
Go Manning’s Roughness Coefficient = (1/Chezy's Constant)*Hydraulic Depth^(1/6)
Manning's Coefficient using Strickler Formula
Go Manning’s Roughness Coefficient = (Roughness Value^(1/6))/21

Manning's Coefficient using Strickler Formula Formula

Manning’s Roughness Coefficient = (Roughness Value^(1/6))/21
n = (Ra^(1/6))/21

What is Manning's Coefficient?

The Manning's n is a coefficient which represents the roughness or friction applied to the flow by the channel.

How to Calculate Manning's Coefficient using Strickler Formula?

Manning's Coefficient using Strickler Formula calculator uses Manning’s Roughness Coefficient = (Roughness Value^(1/6))/21 to calculate the Manning’s Roughness Coefficient, The Manning's Coefficient using Strickler Formula is defined as the roughness constant used in Manning's formulas. Manning’s Roughness Coefficient is denoted by n symbol.

How to calculate Manning's Coefficient using Strickler Formula using this online calculator? To use this online calculator for Manning's Coefficient using Strickler Formula, enter Roughness Value (Ra) and hit the calculate button. Here is how the Manning's Coefficient using Strickler Formula calculation can be explained with given input values -> 0.004762 = (1E-06^(1/6))/21.

FAQ

What is Manning's Coefficient using Strickler Formula?
The Manning's Coefficient using Strickler Formula is defined as the roughness constant used in Manning's formulas and is represented as n = (Ra^(1/6))/21 or Manning’s Roughness Coefficient = (Roughness Value^(1/6))/21. Roughness Value is the arithmetic average of the absolute values of the roughness profile ordinates.
How to calculate Manning's Coefficient using Strickler Formula?
The Manning's Coefficient using Strickler Formula is defined as the roughness constant used in Manning's formulas is calculated using Manning’s Roughness Coefficient = (Roughness Value^(1/6))/21. To calculate Manning's Coefficient using Strickler Formula, you need Roughness Value (Ra). With our tool, you need to enter the respective value for Roughness Value 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 Manning’s Roughness Coefficient?
In this formula, Manning’s Roughness Coefficient uses Roughness Value. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • Manning’s Roughness Coefficient = (1/Average Velocity of Uniform Flow)*(Bed Slope^(1/2))*(Hydraulic Radius of Channel^(2/3))
  • Manning’s Roughness Coefficient = (1/Chezy's Constant)*Hydraulic Depth^(1/6)
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