Discharge over a broad-crested weir Calculator

Category	Physics ↺
Physics	Fluid Mechanics ↺
Fluid-Mechanics	Notches and Weirs ↺

✖The coefficient of discharging or efflux coefficient is the ratio of the actual discharge to the theoretical dischargeⓘ coefficient of discharging [Cd]			+10% -10%
✖Length is the measurement or extent of something from end to end.ⓘ Length [l]			+10% -10%
✖The head of the liquid is the height of a liquid column that corresponds to a particular pressure exerted by the liquid column from the base of its container.ⓘ head of the liquid [H]			+10% -10%

✖Discharge is the rate of flow of a liquidⓘ Discharge over a broad-crested weir [Q]

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Maiarutselvan V

PSG College of Technology (PSGCT), Coimbatore

Maiarutselvan V has created this Calculator and 300+ more calculators!

Vinay Mishra

Indian Institute for Aeronautical Engineering and Information Technology (IIAEIT), Pune

Vinay Mishra has verified this Calculator and 100+ more calculators!

< 11 Other formulas that you can solve using the same Inputs

Surface Area of a Rectangular Prism

Surface Area=2*(Length*Width+Length*Height+Width*Height) GO

Perimeter of a rectangle when diagonal and length are given

Perimeter=2*(Length+sqrt((Diagonal)^2-(Length)^2)) GO

Magnetic Flux

Magnetic Flux=Magnetic Field*Length*Breadth*cos(θ) GO

Diagonal of a Rectangle when length and area are given

Diagonal=sqrt(((Area)^2/(Length)^2)+(Length)^2) GO

Area of a Rectangle when length and diagonal are given

Area=Length*(sqrt((Diagonal)^2-(Length)^2)) GO

Diagonal of a Rectangle when length and breadth are given

Diagonal=sqrt(Length^2+Breadth^2) GO

Strain

Strain=Change In Length/Length GO

Surface Tension

Surface Tension=Force/Length GO

Perimeter of a rectangle when length and width are given

Perimeter=2*Length+2*Width GO

Volume of a Rectangular Prism

Volume=Width*Height*Length GO

Area of a Rectangle when length and breadth are given

Area=Length*Breadth GO

< 11 Other formulas that calculate the same Output

Discharge with velocity of approach

Discharge=(2/3)*coefficient of discharging*Length*sqrt(2*[g])*(((initial height of liquid+final height of liquid)^1.5)-(final height of liquid^1.5)) GO

Discharge over a broad-crested weir for head of liquid at middle

Discharge=coefficient of discharging*Length*sqrt((2*[g])*((head of the liquid*head of liquid middle^2)-(head of liquid middle^3))) GO

Discharge over rectangle weir for Bazin's formula with velocity approach

Discharge=(0.405+(0.003/(head of the liquid+head due to Va)))*Length*sqrt(2*[g])*((head of the liquid+head due to Va)^1.5) GO

Discharge over a broad-crested weir with velocity approach

Discharge=1.705*coefficient of discharging*Length*(((head of the liquid+head due to Va)^1.5)-((head due to Va)^1.5)) GO

Discharge over rectangle weir with two end contractions

Discharge=(2/3)*coefficient of discharging*(Length-(0.2*head of the liquid))*sqrt(2*[g])*(head of the liquid^1.5) GO

Discharge over rectangle weir considering Francis's formula

Discharge=1.84*Length*(((initial height of liquid+final height of liquid)^1.5)-(final height of liquid^1.5)) GO

Discharge from Manning's equation

Discharge=(1/Manning’s Roughness Coefficient)*Cross sectional area*hydraulic radius^2/3*Bed Slope^1/2 GO

Discharge without velocity of approach

Discharge=(2/3)*coefficient of discharging*Length*sqrt(2*[g])*(initial height of liquid^1.5) GO

Discharge over rectangle weir considering Bazin's formula

Discharge=(0.405+(0.003/head of the liquid))*Length*sqrt(2*[g])*((head of the liquid)^1.5) GO

Discharge during retraction

Discharge=Velocity*(Area of piston-Area of piston rod) GO

Discharge during extension

Discharge=Velocity*Area of piston GO

Discharge over a broad-crested weir Formula

Discharge=1.705*coefficient of discharging*Length*(head of the liquid^1.5)
Q=1.705*Cd*l*(H^1.5)

More formulas

Discharge over rectangle notch or weir GO

Length of section for discharge over rectangle notch or weir GO

Head of liquid over the crest GO

Discharge over a triangular notch or weir GO

Head of liquid above the V-notch GO

Discharge over a trapezoidal notch or weir GO

Time required to empty a reservoir GO

Length of crest of the weir or notch GO

Coefficient of discharge for time required to empty a reservoir GO

Time required to empty a tank with a triangular weir or notch GO

Discharge with velocity of approach GO

Length of weir or notch for velocity of approach GO

Discharge without velocity of approach GO

Length of weir or notch without velocity of approach GO

Discharge over rectangle weir considering Francis's formula GO

Length of weir considering Francis's formula GO

Discharge over rectangle weir considering Bazin's formula GO

Length of weir considering Bazin's formula without velocity approach GO

Discharge over rectangle weir for Bazin's formula with velocity approach GO

Length of weir considering Bazin's formula with velocity approach GO

Discharge over rectangle weir with two end contractions GO

Length of weir for Discharge over a broad-crested weir GO

Discharge over a broad-crested weir for head of liquid at middle GO

Length of weir for broad-crested weir and head of liquid at middle GO

Discharge over a broad-crested weir with velocity approach GO

Length of weir for broad-crested weir with velocity approach GO

What is broad-crested weir?

Broad crested weirs are robust structures that are generally constructed from reinforced concrete and which usually span the full width of the channel. They are used to measure the discharge of rivers and are much more suited for this purpose than the relatively flimsy sharp-crested weirs.

What are the types of weirs based on shape of the crest?

It is of four types they are, sharp-crested weir, broad- crested weir, narrow-crested weir, and ogee-shaped weir.

How to Calculate Discharge over a broad-crested weir?

Discharge over a broad-crested weir calculator uses Discharge=1.705*coefficient of discharging*Length*(head of the liquid^1.5) to calculate the Discharge, The Discharge over a broad-crested weir formula is known by considering the coefficient of discharge, length, and the head of liquid without the velocity approach. Discharge and is denoted by Q symbol.

How to calculate Discharge over a broad-crested weir using this online calculator? To use this online calculator for Discharge over a broad-crested weir, enter coefficient of discharging (Cd), Length (l) and head of the liquid (H) and hit the calculate button. Here is how the Discharge over a broad-crested weir calculation can be explained with given input values -> 161.7505 = 1.705*1*3*(10^1.5).

FAQ

What is Discharge over a broad-crested weir?

The Discharge over a broad-crested weir formula is known by considering the coefficient of discharge, length, and the head of liquid without the velocity approach and is represented as Q=1.705*Cd*l*(H^1.5) or Discharge=1.705*coefficient of discharging*Length*(head of the liquid^1.5). The coefficient of discharging or efflux coefficient is the ratio of the actual discharge to the theoretical discharge, Length is the measurement or extent of something from end to end and The head of the liquid is the height of a liquid column that corresponds to a particular pressure exerted by the liquid column from the base of its container.

How to calculate Discharge over a broad-crested weir?

The Discharge over a broad-crested weir formula is known by considering the coefficient of discharge, length, and the head of liquid without the velocity approach is calculated using Discharge=1.705*coefficient of discharging*Length*(head of the liquid^1.5). To calculate Discharge over a broad-crested weir, you need coefficient of discharging (Cd), Length (l) and head of the liquid (H). With our tool, you need to enter the respective value for coefficient of discharging, Length and head of the liquid 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?

In this formula, Discharge uses coefficient of discharging, Length and head of the liquid. We can use 11 other way(s) to calculate the same, which is/are as follows -

Discharge=Velocity*Area of piston
Discharge=Velocity*(Area of piston-Area of piston rod)
Discharge=(2/3)*coefficient of discharging*Length*sqrt(2*[g])*(((initial height of liquid+final height of liquid)^1.5)-(final height of liquid^1.5))
Discharge=(2/3)*coefficient of discharging*Length*sqrt(2*[g])*(initial height of liquid^1.5)
Discharge=(1/Manning’s Roughness Coefficient)*Cross sectional area*hydraulic radius^2/3*Bed Slope^1/2
Discharge=1.84*Length*(((initial height of liquid+final height of liquid)^1.5)-(final height of liquid^1.5))
Discharge=(0.405+(0.003/head of the liquid))*Length*sqrt(2*[g])*((head of the liquid)^1.5)
Discharge=(0.405+(0.003/(head of the liquid+head due to Va)))*Length*sqrt(2*[g])*((head of the liquid+head due to Va)^1.5)
Discharge=(2/3)*coefficient of discharging*(Length-(0.2*head of the liquid))*sqrt(2*[g])*(head of the liquid^1.5)
Discharge=coefficient of discharging*Length*sqrt((2*[g])*((head of the liquid*head of liquid middle^2)-(head of liquid middle^3)))
Discharge=1.705*coefficient of discharging*Length*(((head of the liquid+head due to Va)^1.5)-((head due to Va)^1.5))

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