Discharge at Structure Calculator

✖System Constant k for measuring the discharge rates in flow-measuring structures.ⓘ System Constant k [k]			+10% -10%
✖Head over Weir is the stream or river to raise the water level or divert its flow.ⓘ Head over Weir [H]			+10% -10%
✖System Constant n in the discharge rate of streamflow measurement.ⓘ System Constant n [n_system]			+10% -10%

✖Flow Discharge into a well is the amount of fluid passing a section of a stream in unit time is called the discharge.ⓘ Discharge at Structure [Q_f]

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Formula

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Discharge at Structure

Formula

`"Q"_{"f"} = "k"*("H"^("n"_{"system"}))`

Example

`"35.96325m³/s"="2"*(("3m")^("2.63"))`

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Download Indirect Methods of Streamflow Measurement Formulas PDF

Discharge at Structure Solution

STEP 0: Pre-Calculation Summary

Formula Used

Flow Discharge = System Constant k*(Head over Weir^(System Constant n))
Q_f = k*(H^(n_system))
This formula uses 4 Variables

Variables Used

Flow Discharge - (Measured in Cubic Meter per Second) - Flow Discharge into a well is the amount of fluid passing a section of a stream in unit time is called the discharge.
System Constant k - System Constant k for measuring the discharge rates in flow-measuring structures.
Head over Weir - (Measured in Meter) - Head over Weir is the stream or river to raise the water level or divert its flow.
System Constant n - System Constant n in the discharge rate of streamflow measurement.

STEP 1: Convert Input(s) to Base Unit

System Constant k: 2 --> No Conversion Required
Head over Weir: 3 Meter --> 3 Meter No Conversion Required
System Constant n: 2.63 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Q_f = k*(H^(n_system)) --> 2*(3^(2.63))

Evaluating ... ...

Q_f = 35.9632469805084

STEP 3: Convert Result to Output's Unit

35.9632469805084 Cubic Meter per Second --> No Conversion Required

FINAL ANSWER

35.9632469805084 ≈ 35.96325 Cubic Meter per Second <-- Flow Discharge

(Calculation completed in 00.004 seconds)

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Created by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

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< 4 Flow Measuring Structures Calculators

Free Flow Discharge under Head using Submerged Flow over Weir

Go Free Flow Discharge under Head H1 = Submerged Discharge/(1-(Downstream Water Surface Elevation/Upstream Water Surface Elevation)^Exponent of Head)^0.385

Submerged Flow over Weir using Villemonte Formula

Go Submerged Discharge = Free Flow Discharge under Head H1*(1-(Downstream Water Surface Elevation/Upstream Water Surface Elevation)^Exponent of Head)^0.385

Head over Weir given Discharge

Go Head over Weir = (Flow Discharge/System Constant k)^(1/System Constant n)

Discharge at Structure

Go Flow Discharge = System Constant k*(Head over Weir^(System Constant n))

Discharge at Structure Formula

Flow Discharge = System Constant k*(Head over Weir^(System Constant n))
Q_f = k*(H^(n_system))

What is a Weir?

A weir or low-head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. They are also used to control the flow of water for outlets of lakes, ponds, and reservoirs.

What is Basic Principle governing the Use of Weir?

The basic principle governing the use of a weir, flume or similar flow-measuring structures is that structures produce a unique control section in the flow.

How to Calculate Discharge at Structure?

Discharge at Structure calculator uses Flow Discharge = System Constant k*(Head over Weir^(System Constant n)) to calculate the Flow Discharge, The Discharge at Structure formula is defined as an overflow structure placed across the flow. The edge over which the flow occurs is called the crest of the weir. Flow Discharge is denoted by Q_f symbol.

How to calculate Discharge at Structure using this online calculator? To use this online calculator for Discharge at Structure, enter System Constant k (k), Head over Weir (H) & System Constant n (n_system) and hit the calculate button. Here is how the Discharge at Structure calculation can be explained with given input values -> 35.96325 = 2*(3^(2.63)).

FAQ

What is Discharge at Structure?

The Discharge at Structure formula is defined as an overflow structure placed across the flow. The edge over which the flow occurs is called the crest of the weir and is represented as Q_f = k*(H^(n_system)) or Flow Discharge = System Constant k*(Head over Weir^(System Constant n)). System Constant k for measuring the discharge rates in flow-measuring structures, Head over Weir is the stream or river to raise the water level or divert its flow & System Constant n in the discharge rate of streamflow measurement.

How to calculate Discharge at Structure?

The Discharge at Structure formula is defined as an overflow structure placed across the flow. The edge over which the flow occurs is called the crest of the weir is calculated using Flow Discharge = System Constant k*(Head over Weir^(System Constant n)). To calculate Discharge at Structure, you need System Constant k (k), Head over Weir (H) & System Constant n (n_system). With our tool, you need to enter the respective value for System Constant k, Head over Weir & System Constant n 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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