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Lag Time of 1-h Unit Hydrograph Formula

GoLag Time of 1-h Unit Hydrograph given Duration of Rainfall Excess Formula

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Lag Time of a 1-h Unit Hydrograph is the time interval from the midpoint of the rainfall excess to the peak. Check FAQs

T p1 = \frac{1.56}{{(\frac{Q pd}{A})}^{0.9}}

T_p1 - Lag Time of a 1-h Unit Hydrograph?Q_pd - Peak discharge of a D-h Unit hydrograph?A - Area of Catchment?

Lag Time of 1-h Unit Hydrograph Example

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Here is how the Lag Time of 1-h Unit Hydrograph equation looks like with Values.

Here is how the Lag Time of 1-h Unit Hydrograph equation looks like with Units.

Here is how the Lag Time of 1-h Unit Hydrograph equation looks like.

26.4795 = \frac{1.56}{{(\frac{129031}{3})}^{0.9}}

26.4795h = \frac{1.56}{{(\frac{129031m³/s}{3km²})}^{0.9}}

26.4795 = \frac{1.56}{{(\frac{129031}{3})}^{0.9}}

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Lag Time of 1-h Unit Hydrograph Solution

Follow our step by step solution on how to calculate Lag Time of 1-h Unit Hydrograph?

FIRST Step Consider the formula

T p1 = \frac{1.56}{{(\frac{Q pd}{A})}^{0.9}}

Next Step Substitute values of Variables

∴

T p1 = \frac{1.56}{{(\frac{129031m³/s}{3km²})}^{0.9}}

Next Step Convert Units

∴

T p1 = \frac{1.56}{{(\frac{129031m³/s}{3E+6m²})}^{0.9}}

Next Step Prepare to Evaluate

∴

T p1 = \frac{1.56}{{(\frac{129031}{3E+6})}^{0.9}}

Next Step Evaluate

∴

T p1 = 95326.0442770526s

Next Step Convert to Output's Unit

∴

T p1 = 26.4794567436257h

LAST Step Rounding Answer

∴

T p1 = 26.4795h

Lag Time of 1-h Unit Hydrograph Formula Elements

Variables

Lag Time of a 1-h Unit Hydrograph

Lag Time of a 1-h Unit Hydrograph is the time interval from the midpoint of the rainfall excess to the peak.

Symbol: T_p1

Measurement: TimeUnit: h

Note: Value should be greater than 0.

Formulas to find Lag Time of a 1-h Unit Hydrograph

Peak discharge of a D-h Unit hydrograph

Peak discharge of a D-h Unit hydrograph is the maximum volume flow rate displays in a unit hydrograph.

Symbol: Q_pd

Measurement: Volumetric Flow RateUnit: m³/s

Note: Value should be greater than 0.

Formulas to find Peak discharge of a D-h Unit hydrograph

Area of Catchment

Area of Catchment is the geographical area from which water flows into a particular point, such as a well, stream, or reservoir.

Symbol: A

Measurement: AreaUnit: km²

Note: Value should be greater than 0.

Formulas to find Area of Catchment

Other Formulas to find Lag Time of a 1-h Unit Hydrograph

Go Lag Time of 1-h Unit Hydrograph given Duration of Rainfall Excess

T p1 = \frac{D}{1.1}

Other formulas in The Indian Practice category

Go Peak Discharge of D-h Unit Hydrograph

Q pd = 1.79 \cdot A^{\frac{3}{4}}

Go Peak Discharge of D-h Unit Hydrograph for Weighted Mean Slope Lesser than 0.0028

Q pd = 37.4 \cdot A^{\frac{3}{4}} \cdot {S m}^{\frac{2}{3}}

Go Catchment Area given Peak Discharge of D-h Unit Hydrograph

A = {(\frac{Q pd}{1.79})}^{\frac{4}{3}}

Go Weighted Mean Slope given Peak Discharge of D-h Unit Hydrograph

S m = {(\frac{Q pd}{37.4 \cdot A^{\frac{3}{4}}})}^{\frac{3}{2}}

How to Evaluate Lag Time of 1-h Unit Hydrograph?

Lag Time of 1-h Unit Hydrograph evaluator uses Lag Time of a 1-h Unit Hydrograph = 1.56/((Peak discharge of a D-h Unit hydrograph/Area of Catchment)^0.9) to evaluate the Lag Time of a 1-h Unit Hydrograph, The Lag Time of 1-h Unit Hydrograph is defined as the time interval from the midpoint of the rainfall excess to the peak. Lag Time of a 1-h Unit Hydrograph is denoted by T_p1 symbol.

How to evaluate Lag Time of 1-h Unit Hydrograph using this online evaluator? To use this online evaluator for Lag Time of 1-h Unit Hydrograph, enter Peak discharge of a D-h Unit hydrograph (Q_pd) & Area of Catchment (A) and hit the calculate button.

FAQs on Lag Time of 1-h Unit Hydrograph

What is the formula to find Lag Time of 1-h Unit Hydrograph?

The formula of Lag Time of 1-h Unit Hydrograph is expressed as Lag Time of a 1-h Unit Hydrograph = 1.56/((Peak discharge of a D-h Unit hydrograph/Area of Catchment)^0.9). Here is an example- 0.007355 = 1.56/((129031/3000000)^0.9).

How to calculate Lag Time of 1-h Unit Hydrograph?

With Peak discharge of a D-h Unit hydrograph (Q_pd) & Area of Catchment (A) we can find Lag Time of 1-h Unit Hydrograph using the formula - Lag Time of a 1-h Unit Hydrograph = 1.56/((Peak discharge of a D-h Unit hydrograph/Area of Catchment)^0.9).

What are the other ways to Calculate Lag Time of a 1-h Unit Hydrograph?

Here are the different ways to Calculate Lag Time of a 1-h Unit Hydrograph-

Lag Time of a 1-h Unit Hydrograph=Duration of Excess Rainfall in Hours/1.1

Can the Lag Time of 1-h Unit Hydrograph be negative?

No, the Lag Time of 1-h Unit Hydrograph, measured in Time cannot be negative.

Which unit is used to measure Lag Time of 1-h Unit Hydrograph?

Lag Time of 1-h Unit Hydrograph is usually measured using the Hour[h] for Time. Second[h], Millisecond[h], Microsecond[h] are the few other units in which Lag Time of 1-h Unit Hydrograph can be measured.

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Lag Time of 1-h Unit Hydrograph Formula

​GoLag Time of 1-h Unit Hydrograph given Duration of Rainfall Excess Formula

Lag Time of 1-h Unit Hydrograph Example

Lag Time of 1-h Unit Hydrograph Solution

Lag Time of 1-h Unit Hydrograph Formula Elements

Other Formulas to find Lag Time of a 1-h Unit Hydrograph

Other formulas in The Indian Practice category

How to Evaluate Lag Time of 1-h Unit Hydrograph?

FAQs on Lag Time of 1-h Unit Hydrograph

Variable Name

GoLag Time of 1-h Unit Hydrograph given Duration of Rainfall Excess Formula