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Manning's coefficient or constant Formula

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Manning’s coefficient for open channel flow represents the roughness or friction applied to the flow by the channel. Check FAQs

n = (\frac{1}{C}) \cdot m^{\frac{1}{6}}

n - Manning’s Coefficient for Open Channel Flow?C - Chezy's Constant for Flow in Open Channel?m - Hydraulic Mean Depth for Open Channel?

Manning's coefficient or constant Example

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Here is how the Manning's coefficient or constant equation looks like with Values.

Here is how the Manning's coefficient or constant equation looks like with Units.

Here is how the Manning's coefficient or constant equation looks like.

0.0144 = (\frac{1}{60}) \cdot {0.423}^{\frac{1}{6}}

0.0144 = (\frac{1}{60}) \cdot {0.423m}^{\frac{1}{6}}

0.0144 = (\frac{1}{60}) \cdot {0.423}^{\frac{1}{6}}

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Manning's coefficient or constant Solution

Follow our step by step solution on how to calculate Manning's coefficient or constant?

FIRST Step Consider the formula

n = (\frac{1}{C}) \cdot m^{\frac{1}{6}}

Next Step Substitute values of Variables

∴

n = (\frac{1}{60}) \cdot {0.423m}^{\frac{1}{6}}

Next Step Prepare to Evaluate

∴

n = (\frac{1}{60}) \cdot {0.423}^{\frac{1}{6}}

Next Step Evaluate

∴

n = 0.0144401646165443

LAST Step Rounding Answer

∴

n = 0.0144

Manning's coefficient or constant Formula Elements

Variables

Manning’s Coefficient for Open Channel Flow

Manning’s coefficient for open channel flow represents the roughness or friction applied to the flow by the channel.

Symbol: n

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Manning’s Coefficient for Open Channel Flow

Chezy's Constant for Flow in Open Channel

Chezy's constant for flow in open channel is a factor used in the equation that estimates mean flow velocity in open channel conduits.

Symbol: C

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Chezy's Constant for Flow in Open Channel

Hydraulic Mean Depth for Open Channel

Hydraulic mean depth for open channel is defined as the area of the flow section divided by the top water surface width.

Symbol: m

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Hydraulic Mean Depth for Open Channel

Other formulas in Flow in Open Channels category

Go Velocity of Chezy's formula

v = C \cdot \sqrt{m \cdot i}

Go Chezy's constant considering velocity

C = \frac{v}{\sqrt{m \cdot i}}

Go Hydraulic mean depth using Chezy's formula

m = (\frac{1}{i}) \cdot {(\frac{v}{C})}^{2}

Go Chezy's constant considering Bazin formula

C = \frac{157.6}{1.81 + (\frac{K}{\sqrt{m}})}

How to Evaluate Manning's coefficient or constant?

Manning's coefficient or constant evaluator uses Manning’s Coefficient for Open Channel Flow = (1/Chezy's Constant for Flow in Open Channel)*Hydraulic Mean Depth for Open Channel^(1/6) to evaluate the Manning’s Coefficient for Open Channel Flow, The Manning's coefficient or constant is known while considering Chezy's constant or coefficient, and the hydraulic mean depth using Manning's formula. Manning’s Coefficient for Open Channel Flow is denoted by n symbol.

How to evaluate Manning's coefficient or constant using this online evaluator? To use this online evaluator for Manning's coefficient or constant, enter Chezy's Constant for Flow in Open Channel (C) & Hydraulic Mean Depth for Open Channel (m) and hit the calculate button.

FAQs on Manning's coefficient or constant

What is the formula to find Manning's coefficient or constant?

The formula of Manning's coefficient or constant is expressed as Manning’s Coefficient for Open Channel Flow = (1/Chezy's Constant for Flow in Open Channel)*Hydraulic Mean Depth for Open Channel^(1/6). Here is an example- 0.01444 = (1/60)*0.423^(1/6).

How to calculate Manning's coefficient or constant?

With Chezy's Constant for Flow in Open Channel (C) & Hydraulic Mean Depth for Open Channel (m) we can find Manning's coefficient or constant using the formula - Manning’s Coefficient for Open Channel Flow = (1/Chezy's Constant for Flow in Open Channel)*Hydraulic Mean Depth for Open Channel^(1/6).

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Manning's coefficient or constant Formula

Manning's coefficient or constant Example

Manning's coefficient or constant Solution

Manning's coefficient or constant Formula Elements

Other formulas in Flow in Open Channels category

How to Evaluate Manning's coefficient or constant?

FAQs on Manning's coefficient or constant

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