Approach Velocity Calculator

✖Discharge by Approach Velocity is the volumetric flow rate (in m 3 /h or ft 3 /h) of water transported through a given cross-sectional area.ⓘ Discharge by Approach Velocity [Q']			+10% -10%
✖Width of Channel1 is the width of Notch and weir.ⓘ Width of Channel1 [b]			+10% -10%
✖Depth of Flow is the distance from the top or surface of the flow to the bottom of a channel or other waterway or Depth of Flow at the Vertical while measuring Sound Weights.ⓘ Depth of Flow [d_f]			+10% -10%

✖Velocity of Flow 1 is the flow of water over the channel.ⓘ Approach Velocity [v]

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Approach Velocity Solution

STEP 0: Pre-Calculation Summary

Formula Used

Velocity of Flow 1 = Discharge by Approach Velocity/(Width of Channel1*Depth of Flow)
v = Q'/(b*d_f)
This formula uses 4 Variables

Variables Used

Velocity of Flow 1 - (Measured in Meter per Second) - Velocity of Flow 1 is the flow of water over the channel.
Discharge by Approach Velocity - (Measured in Cubic Meter per Second) - Discharge by Approach Velocity is the volumetric flow rate (in m 3 /h or ft 3 /h) of water transported through a given cross-sectional area.
Width of Channel1 - (Measured in Meter) - Width of Channel1 is the width of Notch and weir.
Depth of Flow - (Measured in Meter) - Depth of Flow is the distance from the top or surface of the flow to the bottom of a channel or other waterway or Depth of Flow at the Vertical while measuring Sound Weights.

STEP 1: Convert Input(s) to Base Unit

Discharge by Approach Velocity: 153 Cubic Meter per Second --> 153 Cubic Meter per Second No Conversion Required
Width of Channel1: 3.001 Meter --> 3.001 Meter No Conversion Required
Depth of Flow: 3.3 Meter --> 3.3 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

v = Q'/(b*d_f) --> 153/(3.001*3.3)

Evaluating ... ...

v = 15.4493956559935

STEP 3: Convert Result to Output's Unit

15.4493956559935 Meter per Second --> No Conversion Required

FINAL ANSWER

15.4493956559935 ≈ 15.4494 Meter per Second <-- Velocity of Flow 1

(Calculation completed in 00.020 seconds)

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Created by M Naveen

National Institute of Technology (NIT), Warangal

M Naveen has created this Calculator and 500+ more calculators!

Verified by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

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< Flow Over Rectangular Sharp Crested Weir or Notch Calculators

Coefficient of Discharge given Discharge if Velocity considered

LaTeX Go Coefficient of Discharge = (Francis Discharge*3)/(2*(sqrt(2*Acceleration due to Gravity))*(Length of Weir Crest-0.1*Number of End Contraction*Still Water Head)*(Still Water Head^(3/2)-Velocity Head^(3/2)))

Coefficient of Discharge given Discharge if Velocity not considered

LaTeX Go Coefficient of Discharge = (Francis Discharge*3)/(2*(sqrt(2*Acceleration due to Gravity))*(Length of Weir Crest-0.1*Number of End Contraction*Height of Water above Crest of Weir)*Height of Water above Crest of Weir^(3/2))

Coefficient of Discharge given Discharge Passing over Weir considering Velocity

LaTeX Go Coefficient of Discharge = (Francis Discharge with Suppressed End*3)/(2*(sqrt(2*Acceleration due to Gravity))*Length of Weir Crest*((Height of Water above Crest of Weir+Velocity Head)^(3/2)-Velocity Head^(3/2)))

Coefficient of Discharge given Discharge over Weir without considering Velocity

LaTeX Go Coefficient of Discharge = (Francis Discharge with Suppressed End*3)/(2*(sqrt(2*Acceleration due to Gravity))*Length of Weir Crest*Height of Water above Crest of Weir^(3/2))

Approach Velocity Formula

LaTeX Go

Velocity of Flow 1 = Discharge by Approach Velocity/(Width of Channel1*Depth of Flow)
v = Q'/(b*d_f)

What is Discharge?

In hydrology, discharge is the volumetric flow rate of water that is transported through a given cross-sectional area.

What is a channel?

A channel is an open waterway whose purpose is to carry water from one place to another. Channels and canals refer to main waterways supplying water to one or more farms. Field ditches have smaller dimensions and convey water from the farm entrance to the irrigated fields.

How to Calculate Approach Velocity?

Approach Velocity calculator uses Velocity of Flow 1 = Discharge by Approach Velocity/(Width of Channel1*Depth of Flow) to calculate the Velocity of Flow 1, Approach Velocity is defined as the rate of change of relative displacement between two bodies (i.e. how fast a body approaches another body ). Velocity of Flow 1 is denoted by v symbol.

How to calculate Approach Velocity using this online calculator? To use this online calculator for Approach Velocity, enter Discharge by Approach Velocity (Q'), Width of Channel1 (b) & Depth of Flow (d_f) and hit the calculate button. Here is how the Approach Velocity calculation can be explained with given input values -> 14.95601 = 153/(3.001*3.3).

FAQ

What is Approach Velocity?

Approach Velocity is defined as the rate of change of relative displacement between two bodies (i.e. how fast a body approaches another body ) and is represented as v = Q'/(b*d_f) or Velocity of Flow 1 = Discharge by Approach Velocity/(Width of Channel1*Depth of Flow). Discharge by Approach Velocity is the volumetric flow rate (in m 3 /h or ft 3 /h) of water transported through a given cross-sectional area, Width of Channel1 is the width of Notch and weir & Depth of Flow is the distance from the top or surface of the flow to the bottom of a channel or other waterway or Depth of Flow at the Vertical while measuring Sound Weights.

How to calculate Approach Velocity?

Approach Velocity is defined as the rate of change of relative displacement between two bodies (i.e. how fast a body approaches another body ) is calculated using Velocity of Flow 1 = Discharge by Approach Velocity/(Width of Channel1*Depth of Flow). To calculate Approach Velocity, you need Discharge by Approach Velocity (Q'), Width of Channel1 (b) & Depth of Flow (d_f). With our tool, you need to enter the respective value for Discharge by Approach Velocity, Width of Channel1 & Depth of Flow 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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