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Peak value of runoff Formula

GoValue of Peak Discharge Formula

GoPeak Discharge for Field Application Formula

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Peak Discharge is the maximum volume flow rate passing a particular location during an event. Check FAQs

Q p = C r \cdot A D \cdot i

Q_p - Peak Discharge?C_r - Runoff Coefficient?A_D - Drainage Area?i - Intensity of Rainfall?

Peak value of runoff Example

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Here is how the Peak value of runoff equation looks like with Values.

Here is how the Peak value of runoff equation looks like with Units.

Here is how the Peak value of runoff equation looks like.

4 = 0.5 \cdot 18 \cdot 1.6

4m³/s = 0.5 \cdot 18km² \cdot 1.6mm/h

4 = 0.5 \cdot 18 \cdot 1.6

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Peak value of runoff Solution

Follow our step by step solution on how to calculate Peak value of runoff?

FIRST Step Consider the formula

Q p = C r \cdot A D \cdot i

Next Step Substitute values of Variables

∴

Q p = 0.5 \cdot 18km² \cdot 1.6mm/h

Next Step Convert Units

∴

Q p = 0.5 \cdot 1.8E+7m² \cdot 4.4E-7m/s

Next Step Prepare to Evaluate

∴

Q p = 0.5 \cdot 1.8E+7 \cdot 4.4E-7

LAST Step Evaluate

∴

Q p = 4m³/s

Peak value of runoff Formula Elements

Variables

Peak Discharge

Peak Discharge is the maximum volume flow rate passing a particular location during an event.

Symbol: Q_p

Measurement: Volumetric Flow RateUnit: m³/s

Note: Value should be greater than 0.

Formulas to find Peak Discharge

Runoff Coefficient

Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received.

Symbol: C_r

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Runoff Coefficient

Drainage Area

Drainage Area is the total surface area, where the water from rain which is not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point.

Symbol: A_D

Measurement: AreaUnit: km²

Note: Value can be positive or negative.

Formulas to find Drainage Area

Intensity of Rainfall

Intensity of Rainfall is the ratio of the total amount of rain (rainfall depth) falling during a given period to the duration of the period.

Symbol: i

Measurement: SpeedUnit: mm/h

Note: Value should be greater than 0.

Formulas to find Intensity of Rainfall

Other Formulas to find Peak Discharge

Go Value of Peak Discharge

Q p = C r \cdot A D \cdot i

Go Peak Discharge for Field Application

Q p = (\frac{1}{3.6}) \cdot C r \cdot i tcp \cdot A D

Go Peak Discharge Equation based on Field Application

Q p = (\frac{1}{3.6}) \cdot C r \cdot i tcp \cdot A D

Other formulas in Rational Method to Estimate the Flood Peak category

Go Coefficient of Runoff when Peak Value is Considered

C r = \frac{Q p}{A D \cdot i}

Go Drainage Area when Peak Discharge is Considered

A D = \frac{Q p}{i \cdot C r}

Go Intensity of Rainfall when Peak Discharge is Considered

i = \frac{Q p}{C r \cdot A D}

Go Coefficient of Runoff when Peak Discharge for Field Application is Considered

C r = \frac{Q p}{(\frac{1}{3.6}) \cdot i tcp \cdot A D}

How to Evaluate Peak value of runoff?

Peak value of runoff evaluator uses Peak Discharge = Runoff Coefficient*Drainage Area*Intensity of Rainfall to evaluate the Peak Discharge, The Peak Value of Runoff formula is defined as the product of the C runoff coefficient, the rainfall intensity I, and A the sub-catchment area. Peak Discharge is denoted by Q_p symbol.

How to evaluate Peak value of runoff using this online evaluator? To use this online evaluator for Peak value of runoff, enter Runoff Coefficient (C_r), Drainage Area (A_D) & Intensity of Rainfall (i) and hit the calculate button.

FAQs on Peak value of runoff

What is the formula to find Peak value of runoff?

The formula of Peak value of runoff is expressed as Peak Discharge = Runoff Coefficient*Drainage Area*Intensity of Rainfall. Here is an example- 4 = 0.5*18000000*4.44444444444444E-07.

How to calculate Peak value of runoff?

With Runoff Coefficient (C_r), Drainage Area (A_D) & Intensity of Rainfall (i) we can find Peak value of runoff using the formula - Peak Discharge = Runoff Coefficient*Drainage Area*Intensity of Rainfall.

What are the other ways to Calculate Peak Discharge?

Here are the different ways to Calculate Peak Discharge-

Peak Discharge=Runoff Coefficient*Drainage Area*Intensity of Rainfall
Peak Discharge=(1/3.6)*Runoff Coefficient*Mean Intensity of Precipitation*Drainage Area
Peak Discharge=(1/3.6)*Runoff Coefficient*Mean Intensity of Precipitation*Drainage Area

Can the Peak value of runoff be negative?

No, the Peak value of runoff, measured in Volumetric Flow Rate cannot be negative.

Which unit is used to measure Peak value of runoff?

Peak value of runoff 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 Peak value of runoff can be measured.

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Peak value of runoff Formula

​GoValue of Peak Discharge Formula

​GoPeak Discharge for Field Application Formula

Peak value of runoff Example

Peak value of runoff Solution

Peak value of runoff Formula Elements

Other Formulas to find Peak Discharge

Other formulas in Rational Method to Estimate the Flood Peak category

How to Evaluate Peak value of runoff?

FAQs on Peak value of runoff

Variable Name

GoValue of Peak Discharge Formula

GoPeak Discharge for Field Application Formula