Discharge through Drowned Portion Solution

STEP 0: Pre-Calculation Summary
Formula Used
Discharge through Drowned Portion = Coefficient of Discharge*(Length of Weir Crest*Head on Downstream of Weir)*sqrt(2*Acceleration due to Gravity*(Head on Upstream of Weir-Head on Downstream of Weir))
Q2 = Cd*(Lw*h2)*sqrt(2*g*(HUpstream-h2))
This formula uses 1 Functions, 6 Variables
Functions Used
sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)
Variables Used
Discharge through Drowned Portion - (Measured in Cubic Meter per Second) - Discharge through Drowned Portion is a measure of the quantity of fluid flow over unit time, representing the quantity of water in between the downstream and the crest of the water.
Coefficient of Discharge - The Coefficient of Discharge is ratio of actual discharge to theoretical discharge.
Length of Weir Crest - (Measured in Meter) - Length of Weir Crest is the measurement or extent of Weir Crest from end to end.
Head on Downstream of Weir - (Measured in Meter) - Head on Downstream of Weir pertains to the energy status of water in water flow systems and is useful for describing flow in hydraulic structures.
Acceleration due to Gravity - (Measured in Meter per Square Second) - The Acceleration due to Gravity is acceleration gained by an object because of gravitational force.
Head on Upstream of Weir - (Measured in Meter) - Head on Upstream of Weirr pertains to the energy status of water in water flow systems and is useful for describing flow in hydraulic structures.
STEP 1: Convert Input(s) to Base Unit
Coefficient of Discharge: 0.66 --> No Conversion Required
Length of Weir Crest: 3 Meter --> 3 Meter No Conversion Required
Head on Downstream of Weir: 5.1 Meter --> 5.1 Meter No Conversion Required
Acceleration due to Gravity: 9.8 Meter per Square Second --> 9.8 Meter per Square Second No Conversion Required
Head on Upstream of Weir: 10.1 Meter --> 10.1 Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Q2 = Cd*(Lw*h2)*sqrt(2*g*(HUpstream-h2)) --> 0.66*(3*5.1)*sqrt(2*9.8*(10.1-5.1))
Evaluating ... ...
Q2 = 99.9650998699046
STEP 3: Convert Result to Output's Unit
99.9650998699046 Cubic Meter per Second --> No Conversion Required
FINAL ANSWER
99.9650998699046 99.9651 Cubic Meter per Second <-- Discharge through Drowned Portion
(Calculation completed in 00.004 seconds)

Credits

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Created by M Naveen
National Institute of Technology (NIT), Warangal
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Verified by Rithik Agrawal
National Institute of Technology Karnataka (NITK), Surathkal
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Submerged Weirs Calculators

Coefficient of Discharge given Discharge through Free Weir Portion
​ LaTeX ​ Go Coefficient of Discharge = (3*Discharge through Free Portion)/(2*Length of Weir Crest*sqrt(2*Acceleration due to Gravity)*(Head on Upstream of Weir-Head on Downstream of Weir)^(3/2))
Head on Upstream Weir given Discharge through Free Weir Portion
​ LaTeX ​ Go Head on Upstream of Weir = ((3*Discharge through Free Portion)/(2*Coefficient of Discharge*Length of Weir Crest*sqrt(2*Acceleration due to Gravity)))^(2/3)+Head on Downstream of Weir
Length of Crest for Discharge through Free Weir Portion
​ LaTeX ​ Go Length of Weir Crest = (3*Discharge through Free Portion)/(2*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)*(Head on Upstream of Weir-Head on Downstream of Weir)^(3/2))
Discharge through Free Weir Portion
​ LaTeX ​ Go Discharge through Free Portion = (2/3)*Coefficient of Discharge*Length of Weir Crest*sqrt(2*Acceleration due to Gravity)*(Head on Upstream of Weir-Head on Downstream of Weir)^(3/2)

Discharge through Drowned Portion Formula

​LaTeX ​Go
Discharge through Drowned Portion = Coefficient of Discharge*(Length of Weir Crest*Head on Downstream of Weir)*sqrt(2*Acceleration due to Gravity*(Head on Upstream of Weir-Head on Downstream of Weir))
Q2 = Cd*(Lw*h2)*sqrt(2*g*(HUpstream-h2))

What is meant by Coefficient of discharge?

Coefficient of discharge is stated as the ratio between the actual flow discharge and theoretical flow discharge.

How to Calculate Discharge through Drowned Portion?

Discharge through Drowned Portion calculator uses Discharge through Drowned Portion = Coefficient of Discharge*(Length of Weir Crest*Head on Downstream of Weir)*sqrt(2*Acceleration due to Gravity*(Head on Upstream of Weir-Head on Downstream of Weir)) to calculate the Discharge through Drowned Portion, The Discharge through drowned portion is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. Discharge through Drowned Portion is denoted by Q2 symbol.

How to calculate Discharge through Drowned Portion using this online calculator? To use this online calculator for Discharge through Drowned Portion, enter Coefficient of Discharge (Cd), Length of Weir Crest (Lw), Head on Downstream of Weir (h2), Acceleration due to Gravity (g) & Head on Upstream of Weir (HUpstream) and hit the calculate button. Here is how the Discharge through Drowned Portion calculation can be explained with given input values -> 99.9651 = 0.66*(3*5.1)*sqrt(2*9.8*(10.1-5.1)).

FAQ

What is Discharge through Drowned Portion?
The Discharge through drowned portion is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass and is represented as Q2 = Cd*(Lw*h2)*sqrt(2*g*(HUpstream-h2)) or Discharge through Drowned Portion = Coefficient of Discharge*(Length of Weir Crest*Head on Downstream of Weir)*sqrt(2*Acceleration due to Gravity*(Head on Upstream of Weir-Head on Downstream of Weir)). The Coefficient of Discharge is ratio of actual discharge to theoretical discharge, Length of Weir Crest is the measurement or extent of Weir Crest from end to end, Head on Downstream of Weir pertains to the energy status of water in water flow systems and is useful for describing flow in hydraulic structures, The Acceleration due to Gravity is acceleration gained by an object because of gravitational force & Head on Upstream of Weirr pertains to the energy status of water in water flow systems and is useful for describing flow in hydraulic structures.
How to calculate Discharge through Drowned Portion?
The Discharge through drowned portion is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass is calculated using Discharge through Drowned Portion = Coefficient of Discharge*(Length of Weir Crest*Head on Downstream of Weir)*sqrt(2*Acceleration due to Gravity*(Head on Upstream of Weir-Head on Downstream of Weir)). To calculate Discharge through Drowned Portion, you need Coefficient of Discharge (Cd), Length of Weir Crest (Lw), Head on Downstream of Weir (h2), Acceleration due to Gravity (g) & Head on Upstream of Weir (HUpstream). With our tool, you need to enter the respective value for Coefficient of Discharge, Length of Weir Crest, Head on Downstream of Weir, Acceleration due to Gravity & Head on Upstream of Weir 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 Discharge through Drowned Portion?
In this formula, Discharge through Drowned Portion uses Coefficient of Discharge, Length of Weir Crest, Head on Downstream of Weir, Acceleration due to Gravity & Head on Upstream of Weir. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • Discharge through Drowned Portion = Total Discharge of Submerged Weir-Discharge through Free Portion
  • Discharge through Drowned Portion = Coefficient of Discharge*Length of Weir Crest*Head on Downstream of Weir*(sqrt(2*Acceleration due to Gravity*(Head on Upstream of Weir-Head on Downstream of Weir)+Velocity over Submerged Weir^2))
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