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Recurrence Interval Formula

GoRecurrence Interval by California Method Formula

GoRecurrence Interval by Hazen's Method Formula

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Recurrence Interval refers to the average time between events like floods or storms of a specific intensity, typically measured in years. Check FAQs

T r = \frac{100}{F}

T_r - Recurrence Interval?F - Flood Frequency?

Recurrence Interval Example

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With units

Only example

Here is how the Recurrence Interval equation looks like with Values.

Here is how the Recurrence Interval equation looks like with Units.

Here is how the Recurrence Interval equation looks like.

3.003 = \frac{100}{33.3}

3.003 = \frac{100}{33.3}

3.003 = \frac{100}{33.3}

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Recurrence Interval Solution

Follow our step by step solution on how to calculate Recurrence Interval?

FIRST Step Consider the formula

T r = \frac{100}{F}

Next Step Substitute values of Variables

∴

T r = \frac{100}{33.3}

Next Step Prepare to Evaluate

∴

T r = \frac{100}{33.3}

Next Step Evaluate

∴

T r = 3.003003003003

LAST Step Rounding Answer

∴

T r = 3.003

Recurrence Interval Formula Elements

Variables

Recurrence Interval

Recurrence Interval refers to the average time between events like floods or storms of a specific intensity, typically measured in years.

Symbol: T_r

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Recurrence Interval

Flood Frequency

The Flood Frequency refers to the likelihood or recurrence interval of floods of a specific magnitude occurring in a given area over time.

Symbol: F

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Flood Frequency

Other Formulas to find Recurrence Interval

Go Recurrence Interval by California Method

T r = \frac{N Years}{m}

Go Recurrence Interval by Hazen's Method

T r = \frac{2 \cdot N Years}{2 \cdot m - 1}

Go Recurrence Interval by Gumbel's Method

T r = \frac{N Years}{m + C g - 1}

Other formulas in Flood Serial Number category

Go Number of Years given Recurrence Interval by California Method

N Years = T r \cdot m

Go Flood Serial Number given Recurrence Interval by California Method

m = \frac{N Years}{T r}

Go Number of Years given Recurrence Interval by Hazen's Method

N Years = \frac{T r \cdot (2 \cdot m - 1)}{2}

Go Flood Serial Number given Recurrence Interval by Hazen's Method

m = \frac{(\frac{2 \cdot N Years}{T r}) + 1}{2}

How to Evaluate Recurrence Interval?

Recurrence Interval evaluator uses Recurrence Interval = 100/Flood Frequency to evaluate the Recurrence Interval, The Recurrence Interval is defined as the average time or an estimated average time between events such as earthquakes, floods, landslides, or a river discharge flows to occur. Recurrence Interval is denoted by T_r symbol.

How to evaluate Recurrence Interval using this online evaluator? To use this online evaluator for Recurrence Interval, enter Flood Frequency (F) and hit the calculate button.

FAQs on Recurrence Interval

What is the formula to find Recurrence Interval?

The formula of Recurrence Interval is expressed as Recurrence Interval = 100/Flood Frequency. Here is an example- 4 = 100/33.3.

How to calculate Recurrence Interval?

With Flood Frequency (F) we can find Recurrence Interval using the formula - Recurrence Interval = 100/Flood Frequency.

What are the other ways to Calculate Recurrence Interval?

Here are the different ways to Calculate Recurrence Interval-

Recurrence Interval=Number of Years/Flood Serial Number
Recurrence Interval=(2*Number of Years)/(2*Flood Serial Number-1)
Recurrence Interval=Number of Years/(Flood Serial Number+Gumbel Correction-1)

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