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Roughness Coefficient while Running Partially Full using Proportionate Velocity Calculator

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Circular Sewer Section Running Partially Full Circular Sewer Section Running Full

✖The Roughness Coefficient for Running Full accounts for uniform surface resistance affecting flow velocity and friction loss.ⓘ Roughness Coefficient for Running Full [N]			+10% -10%
✖Proportionate Velocity is ratio of velocity when water is partially full to velocity when water is totally full.ⓘ Proportionate Velocity [P_v]			+10% -10%
✖Hydraulic Mean Depth for Partially Full refers to the cross-sectional area of flow divided by the wetted perimeter, adapting to varying water levels.ⓘ Hydraulic Mean Depth for Partially Full [r_pf]			+10% -10%
✖Hydraulic Mean Depth while Running Full refers to the ratio of the pipe's full cross-sectional area to its full wetted perimeter.ⓘ Hydraulic Mean Depth while Running Full [R_rf]			+10% -10%

✖Roughness Coefficient Partially Full means roughness coefficient of pipe while running partially full.ⓘ Roughness Coefficient while Running Partially Full using Proportionate Velocity [n_p]

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Formula

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Roughness Coefficient while Running Partially Full using Proportionate Velocity

Formula

n p = (\frac{N}{P v}) \cdot {(\frac{r pf}{R rf})}^{\frac{2}{3}}

Example

0.699844 = (\frac{0.74}{0.765}) \cdot {(\frac{3.2 m}{5.2 m})}^{\frac{2}{3}}

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Roughness Coefficient while Running Partially Full using Proportionate Velocity Solution

STEP 0: Pre-Calculation Summary

Formula Used

Roughness Coefficient Partially Full = (Roughness Coefficient for Running Full/Proportionate Velocity)*(Hydraulic Mean Depth for Partially Full/Hydraulic Mean Depth while Running Full)^(2/3)
n_p = (N/P_v)*(r_pf/R_rf)^(2/3)
This formula uses 5 Variables

Variables Used

Roughness Coefficient Partially Full - Roughness Coefficient Partially Full means roughness coefficient of pipe while running partially full.
Roughness Coefficient for Running Full - The Roughness Coefficient for Running Full accounts for uniform surface resistance affecting flow velocity and friction loss.
Proportionate Velocity - Proportionate Velocity is ratio of velocity when water is partially full to velocity when water is totally full.
Hydraulic Mean Depth for Partially Full - (Measured in Meter) - Hydraulic Mean Depth for Partially Full refers to the cross-sectional area of flow divided by the wetted perimeter, adapting to varying water levels.
Hydraulic Mean Depth while Running Full - (Measured in Meter) - Hydraulic Mean Depth while Running Full refers to the ratio of the pipe's full cross-sectional area to its full wetted perimeter.

STEP 1: Convert Input(s) to Base Unit

Roughness Coefficient for Running Full: 0.74 --> No Conversion Required
Proportionate Velocity: 0.765 --> No Conversion Required
Hydraulic Mean Depth for Partially Full: 3.2 Meter --> 3.2 Meter No Conversion Required
Hydraulic Mean Depth while Running Full: 5.2 Meter --> 5.2 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

n_p = (N/P_v)*(r_pf/R_rf)^(2/3) --> (0.74/0.765)*(3.2/5.2)^(2/3)

Evaluating ... ...

n_p = 0.699844210724328

STEP 3: Convert Result to Output's Unit

0.699844210724328 --> No Conversion Required

FINAL ANSWER

0.699844210724328 ≈ 0.699844 <-- Roughness Coefficient Partially Full

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Environmental Engineering » Hydraulic Designs of Sewers and S. W. Drain Sections » Hydraulic Characteristics of Circular Sewers Sections » Circular Sewer Section Running Partially Full » Roughness Coefficient while Running Partially Full using Proportionate Velocity

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Created by Suraj Kumar

Birsa Institute of Technology (BIT), Sindri

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< Circular Sewer Section Running Partially Full Calculators

Roughness Coefficient while Running Partially Full using Proportionate Velocity

Go Roughness Coefficient Partially Full = (Roughness Coefficient for Running Full/Proportionate Velocity)*(Hydraulic Mean Depth for Partially Full/Hydraulic Mean Depth while Running Full)^(2/3)

Hydraulic Mean Depth while Running Partially Full given Proportionate Hydraulic Mean Depth

Go Hydraulic Mean Depth for Partially Full = Hydraulic Mean Depth while Running Full*Proportionate Hydraulic Mean Depth

Velocity while Running Partially Full given Proportionate Velocity

Go Velocity in a Partially Running Sewer = Velocity While Running Full*Proportionate Velocity

Area of Cross-section while Running Partially Full given Proportionate Area

Go Area of Partially Full Sewers = Proportionate Area*Area of Running Full Sewers

Roughness Coefficient while Running Partially Full using Proportionate Velocity Formula

What is roughness coefficient ?

Roughness coefficient is based on the material of the pipe.New steel pipe uses a C value of 140, but with use and corrosion a lower value is typically used. For HDPE pipe, a range of C values between 150 and 160 is typical.

How to Calculate Roughness Coefficient while Running Partially Full using Proportionate Velocity?

Roughness Coefficient while Running Partially Full using Proportionate Velocity calculator uses Roughness Coefficient Partially Full = (Roughness Coefficient for Running Full/Proportionate Velocity)*(Hydraulic Mean Depth for Partially Full/Hydraulic Mean Depth while Running Full)^(2/3) to calculate the Roughness Coefficient Partially Full, The Roughness Coefficient while Running Partially Full using Proportionate Velocity calculates the roughness coefficient when we have prior information of other parameters. Roughness Coefficient Partially Full is denoted by n_p symbol.

How to calculate Roughness Coefficient while Running Partially Full using Proportionate Velocity using this online calculator? To use this online calculator for Roughness Coefficient while Running Partially Full using Proportionate Velocity, enter Roughness Coefficient for Running Full (N), Proportionate Velocity (P_v), Hydraulic Mean Depth for Partially Full (r_pf) & Hydraulic Mean Depth while Running Full (R_rf) and hit the calculate button. Here is how the Roughness Coefficient while Running Partially Full using Proportionate Velocity calculation can be explained with given input values -> 0.892301 = (0.74/0.765)*(3.2/5.2)^(2/3).

FAQ

What is Roughness Coefficient while Running Partially Full using Proportionate Velocity?

The Roughness Coefficient while Running Partially Full using Proportionate Velocity calculates the roughness coefficient when we have prior information of other parameters and is represented as n_p = (N/P_v)*(r_pf/R_rf)^(2/3) or Roughness Coefficient Partially Full = (Roughness Coefficient for Running Full/Proportionate Velocity)*(Hydraulic Mean Depth for Partially Full/Hydraulic Mean Depth while Running Full)^(2/3). The Roughness Coefficient for Running Full accounts for uniform surface resistance affecting flow velocity and friction loss, Proportionate Velocity is ratio of velocity when water is partially full to velocity when water is totally full, Hydraulic Mean Depth for Partially Full refers to the cross-sectional area of flow divided by the wetted perimeter, adapting to varying water levels & Hydraulic Mean Depth while Running Full refers to the ratio of the pipe's full cross-sectional area to its full wetted perimeter.

How to calculate Roughness Coefficient while Running Partially Full using Proportionate Velocity?

The Roughness Coefficient while Running Partially Full using Proportionate Velocity calculates the roughness coefficient when we have prior information of other parameters is calculated using Roughness Coefficient Partially Full = (Roughness Coefficient for Running Full/Proportionate Velocity)*(Hydraulic Mean Depth for Partially Full/Hydraulic Mean Depth while Running Full)^(2/3). To calculate Roughness Coefficient while Running Partially Full using Proportionate Velocity, you need Roughness Coefficient for Running Full (N), Proportionate Velocity (P_v), Hydraulic Mean Depth for Partially Full (r_pf) & Hydraulic Mean Depth while Running Full (R_rf). With our tool, you need to enter the respective value for Roughness Coefficient for Running Full, Proportionate Velocity, Hydraulic Mean Depth for Partially Full & Hydraulic Mean Depth while Running Full and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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