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Natural Flow Volume Formula

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Natural Flow Volume is the quantity of water that would have flowed in a river past a particular point in a particular period. Check FAQs
RN=(Ro-Vr)+Vd+EM+Fx+ΔSv
RN - Natural Flow Volume?Ro - Observed Flow Volume?Vr - Volume of Return Flow?Vd - Volume Diverted Out of Stream?EM - Net Evaporation Losses?Fx - Net Export of Water from Basin?ΔSv - Change in Storage Volumes?

Natural Flow Volume Example

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Here is how the Natural Flow Volume equation looks like with Values.

Here is how the Natural Flow Volume equation looks like with Units.

Here is how the Natural Flow Volume equation looks like.

174Edit=(50Edit-10Edit)+12Edit+2Edit+100Edit+20Edit
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Natural Flow Volume Solution

Follow our step by step solution on how to calculate Natural Flow Volume?

FIRST Step Consider the formula
RN=(Ro-Vr)+Vd+EM+Fx+ΔSv
Next Step Substitute values of Variables
∴ RN=(50m³/s-10m³/s)+12m³/s+2+100+20
Next Step Prepare to Evaluate
∴ RN=(50-10)+12+2+100+20
LAST Step Evaluate
∴RN=174m³/s

Natural Flow Volume Formula Elements

Variables
Natural Flow Volume
Natural Flow Volume is the quantity of water that would have flowed in a river past a particular point in a particular period.
Symbol: RN
Measurement: Volumetric Flow RateUnit: m³/s
Note: Value should be greater than 0.
Formulas to find Natural Flow VolumeOpen Variable
Observed Flow Volume
Observed Flow Volume is the recorded the quantity of water that would have flowed in a river past a particular point in a particular period.
Symbol: Ro
Measurement: Volumetric Flow RateUnit: m³/s
Note: Value should be greater than 0.
Formulas to find Observed Flow VolumeOpen Variable
Volume of Return Flow
Volume of Return Flow from irrigation, domestic water supply and industrial use.
Symbol: Vr
Measurement: Volumetric Flow RateUnit: m³/s
Note: Value should be greater than 0.
Formulas to find Volume of Return FlowOpen Variable
Volume Diverted Out of Stream
Volume Diverted Out of Stream for irrigation, domestic water supply and industrial use.
Symbol: Vd
Measurement: Volumetric Flow RateUnit: m³/s
Note: Value should be greater than 0.
Formulas to find Volume Diverted Out of StreamOpen Variable
Net Evaporation Losses
Net Evaporation Losses from Reservoirs on the Stream is the loss of stored volatile liquid component or mixture by evaporation by temperature, pressure, and vapor-recovery systems.
Symbol: EM
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Formulas to find Net Evaporation LossesOpen Variable
Net Export of Water from Basin
Net Export of Water from Basin, any area of land where precipitation collects and drains off into a common outlet.
Symbol: Fx
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Formulas to find Net Export of Water from BasinOpen Variable
Change in Storage Volumes
Change in Storage Volumes of water storage bodies on the stream is the difference of water incoming and outgoing.
Symbol: ΔSv
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Formulas to find Change in Storage VolumesOpen Variable

Other formulas in Natural Flow category

​Go Observed Flow Volume at Terminal Site given Natural Flow Volume
Ro=RN+Vr-Vd-EM-Fx-ΔSv
​Go Volume of Return Flow
Vr=-RN+Ro+Vd+EM+Fx+ΔSv

How to Evaluate Natural Flow Volume?

Natural Flow Volume evaluator uses Natural Flow Volume = (Observed Flow Volume-Volume of Return Flow)+Volume Diverted Out of Stream+Net Evaporation Losses+Net Export of Water from Basin+Change in Storage Volumes to evaluate the Natural Flow Volume, The Natural Flow Volume formula is defined as the quantity of water that would have flowed in a river past a particular point in a particular period but for the effect during that period of diversions to or from, and impoundments on, the river upstream of that point. Natural Flow Volume is denoted by RN symbol.

How to evaluate Natural Flow Volume using this online evaluator? To use this online evaluator for Natural Flow Volume, enter Observed Flow Volume (Ro), Volume of Return Flow (Vr), Volume Diverted Out of Stream (Vd), Net Evaporation Losses (EM), Net Export of Water from Basin (Fx) & Change in Storage Volumes (ΔSv) and hit the calculate button.

FAQs on Natural Flow Volume

What is the formula to find Natural Flow Volume?
The formula of Natural Flow Volume is expressed as Natural Flow Volume = (Observed Flow Volume-Volume of Return Flow)+Volume Diverted Out of Stream+Net Evaporation Losses+Net Export of Water from Basin+Change in Storage Volumes. Here is an example- 174 = (50-10)+12+2+100+20.
How to calculate Natural Flow Volume?
With Observed Flow Volume (Ro), Volume of Return Flow (Vr), Volume Diverted Out of Stream (Vd), Net Evaporation Losses (EM), Net Export of Water from Basin (Fx) & Change in Storage Volumes (ΔSv) we can find Natural Flow Volume using the formula - Natural Flow Volume = (Observed Flow Volume-Volume of Return Flow)+Volume Diverted Out of Stream+Net Evaporation Losses+Net Export of Water from Basin+Change in Storage Volumes.
Can the Natural Flow Volume be negative?
No, the Natural Flow Volume, measured in Volumetric Flow Rate cannot be negative.
Which unit is used to measure Natural Flow Volume?
Natural Flow Volume is usually measured using the Cubic Meter per Second[m³/s] for Volumetric Flow Rate. Cubic Meter per Day[m³/s], Cubic Meter per Hour[m³/s], Cubic Meter per Minute[m³/s] are the few other units in which Natural Flow Volume can be measured.
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