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Length of Weir Crest is the measurement or extent of Weir Crest from end to end. Check FAQs
Lw=QW(max)1.70Cd(H)32
Lw - Length of Weir Crest?QW(max) - Max Discharge Over Broad Crested Weir?Cd - Coefficient of Discharge?H - Total Head?

Length of Crest over Broad Crested Weir for Max Discharge Example

With values
With units
Only example

Here is how the Length of Crest over Broad Crested Weir for Max Discharge equation looks like with Values.

Here is how the Length of Crest over Broad Crested Weir for Max Discharge equation looks like with Units.

Here is how the Length of Crest over Broad Crested Weir for Max Discharge equation looks like.

2.9974Edit=37.6Edit1.700.66Edit(5Edit)32
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Length of Crest over Broad Crested Weir for Max Discharge Solution

Follow our step by step solution on how to calculate Length of Crest over Broad Crested Weir for Max Discharge?

FIRST Step Consider the formula
Lw=QW(max)1.70Cd(H)32
Next Step Substitute values of Variables
Lw=37.6m³/s1.700.66(5m)32
Next Step Prepare to Evaluate
Lw=37.61.700.66(5)32
Next Step Evaluate
Lw=2.99736741368956m
LAST Step Rounding Answer
Lw=2.9974m

Length of Crest over Broad Crested Weir for Max Discharge Formula Elements

Variables
Length of Weir Crest
Length of Weir Crest is the measurement or extent of Weir Crest from end to end.
Symbol: Lw
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Max Discharge Over Broad Crested Weir
Max Discharge Over Broad Crested Weir is max discharge of the quantity of any fluid flow over unit time. The quantity may be either volume or mass.
Symbol: QW(max)
Measurement: Volumetric Flow RateUnit: m³/s
Note: Value should be greater than 0.
Coefficient of Discharge
The Coefficient of Discharge is ratio of actual discharge to theoretical discharge.
Symbol: Cd
Measurement: NAUnit: Unitless
Note: Value should be between 0 to 1.2.
Total Head
Total Head is the combination of weir crested and additional head.
Symbol: H
Measurement: LengthUnit: m
Note: Value can be positive or negative.

Other Formulas to find Length of Weir Crest

​Go Length of Crest given Discharge over Weir
Lw=Qwhc(2[g])(H-hc)
​Go Length of Crest given Actual Discharge over Broad Crested Weir
Lw=QaCdhc(2g)(H-hc)
​Go Length of Crest if Critical Depth is Constant for Discharge of Weir
Lw=Qw1.70Cd(H)32

Other formulas in Broad Crested Weir category

​Go Total Head above Weir Crest
H=hc+(vf22g)
​Go Critical Depth due to Reduction in Area of Flow Section given Total Head
hc=H-(vf22g)
​Go Velocity of Flow given Head
vf=(2g)(H-hc)
​Go Discharge over Broad Crested Weir
Qw=Lwhc(2[g])(H-hc)

How to Evaluate Length of Crest over Broad Crested Weir for Max Discharge?

Length of Crest over Broad Crested Weir for Max Discharge evaluator uses Length of Weir Crest = Max Discharge Over Broad Crested Weir/(1.70*Coefficient of Discharge*(Total Head)^(3/2)) to evaluate the Length of Weir Crest, Length of Crest over Broad Crested Weir for Max Discharge is defined as the distance measured along the axis as it applies to the area of reclamation. Length of Weir Crest is denoted by Lw symbol.

How to evaluate Length of Crest over Broad Crested Weir for Max Discharge using this online evaluator? To use this online evaluator for Length of Crest over Broad Crested Weir for Max Discharge, enter Max Discharge Over Broad Crested Weir (QW(max)), Coefficient of Discharge (Cd) & Total Head (H) and hit the calculate button.

FAQs on Length of Crest over Broad Crested Weir for Max Discharge

What is the formula to find Length of Crest over Broad Crested Weir for Max Discharge?
The formula of Length of Crest over Broad Crested Weir for Max Discharge is expressed as Length of Weir Crest = Max Discharge Over Broad Crested Weir/(1.70*Coefficient of Discharge*(Total Head)^(3/2)). Here is an example- 2.184252 = 37.6/(1.70*0.66*(5)^(3/2)).
How to calculate Length of Crest over Broad Crested Weir for Max Discharge?
With Max Discharge Over Broad Crested Weir (QW(max)), Coefficient of Discharge (Cd) & Total Head (H) we can find Length of Crest over Broad Crested Weir for Max Discharge using the formula - Length of Weir Crest = Max Discharge Over Broad Crested Weir/(1.70*Coefficient of Discharge*(Total Head)^(3/2)).
What are the other ways to Calculate Length of Weir Crest?
Here are the different ways to Calculate Length of Weir Crest-
  • Length of Weir Crest=Discharge Over Broad Crested Weir/(Critical Depth of Weir*sqrt((2*[g])*(Total Head-Critical Depth of Weir)))OpenImg
  • Length of Weir Crest=Actual Discharge over Broad Crested Weir/(Coefficient of Discharge*Critical Depth of Weir*sqrt((2*Acceleration due to Gravity)*(Total Head-Critical Depth of Weir)))OpenImg
  • Length of Weir Crest=Discharge Over Broad Crested Weir/(1.70*Coefficient of Discharge*(Total Head)^(3/2))OpenImg
Can the Length of Crest over Broad Crested Weir for Max Discharge be negative?
No, the Length of Crest over Broad Crested Weir for Max Discharge, measured in Length cannot be negative.
Which unit is used to measure Length of Crest over Broad Crested Weir for Max Discharge?
Length of Crest over Broad Crested Weir for Max Discharge is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Length of Crest over Broad Crested Weir for Max Discharge can be measured.
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