Rainfall Intensity for Phi Index of Practical Use Calculator

✖Φ-Index of a catchment is the constant infiltration capacity that would yield the actual total runoff for a given rainfall amount.ⓘ Φ-Index [φ]			+10% -10%
✖Runoff in Cm from 24h Rainfall of intensity in centimeters per hour (cm/hr).ⓘ Runoff in Cm from 24h Rainfall [R_24-h]			+10% -10%

✖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.ⓘ Rainfall Intensity for Phi Index of Practical Use [I]

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Formula

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Rainfall Intensity for Phi Index of Practical Use

Formula

`"I" = ("φ"*24)+"R"_{"24-h"}`

Example

`"0.7996cm/h"=("0.0279"*24)+"0.13cm"`

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Rainfall Intensity for Phi Index of Practical Use Solution

STEP 0: Pre-Calculation Summary

Formula Used

Intensity of Rainfall = (Φ-Index*24)+Runoff in Cm from 24h Rainfall
I = (φ*24)+R_24-h
This formula uses 3 Variables

Variables Used

Intensity of Rainfall - (Measured in Centimeter per Hour) - 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.
Φ-Index - Φ-Index of a catchment is the constant infiltration capacity that would yield the actual total runoff for a given rainfall amount.
Runoff in Cm from 24h Rainfall - (Measured in Centimeter) - Runoff in Cm from 24h Rainfall of intensity in centimeters per hour (cm/hr).

STEP 1: Convert Input(s) to Base Unit

Φ-Index: 0.0279 --> No Conversion Required
Runoff in Cm from 24h Rainfall: 0.13 Centimeter --> 0.13 Centimeter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I = (φ*24)+R_24-h --> (0.0279*24)+0.13

Evaluating ... ...

I = 0.7996

STEP 3: Convert Result to Output's Unit

2.22111111111111E-06 Meter per Second -->0.7996 Centimeter per Hour (Check conversion here)

FINAL ANSWER

0.7996 Centimeter per Hour <-- Intensity of Rainfall

(Calculation completed in 00.014 seconds)

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Home » Engineering » Civil » Engineering Hydrology » Abstractions from Precipitation » Infiltration Indices » Φ-Index » Rainfall Intensity for Phi Index of Practical Use

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Coorg Institute of Technology (CIT), Coorg

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< 11 Φ-Index Calculators

Precipitation given Total Runoff Depth for Practical Use

Go Total Storm Precipitation = Total Direct Runoff+(Φ-Index*Duration of Rainfall Excess)

Duration of Rainfall Excess given Total Runoff Depth

Go Duration of Rainfall Excess = (Total Storm Precipitation-Total Direct Runoff)/Φ-Index

Phi Index given Total Runoff Depth

Go Φ-Index = (Total Storm Precipitation-Total Direct Runoff)/Duration of Rainfall Excess

Total Direct Runoff Depth

Go Total Direct Runoff = Total Storm Precipitation-(Φ-Index*Duration of Rainfall Excess)

Runoff to Determine Phi Index for Practical Use

Go Runoff in Cm from 24h Rainfall = Coefficient Depending on Soil Type*Intensity of Rainfall^1.2

Rainfall Intensity for Phi Index of Practical Use

Go Intensity of Rainfall = (Φ-Index*24)+Runoff in Cm from 24h Rainfall

Runoff for Phi Index for Practical Use

Go Runoff in Cm from 24h Rainfall = Intensity of Rainfall-(Φ-Index*24)

Phi Index for Practical Use

Go Φ-Index = (Intensity of Rainfall-Runoff in Cm from 24h Rainfall)/24

Pulses of Time Interval from Rainfall Hyetograph

Go Pulses of Time Interval = Duration/Time Interval

Duration of Rainfall from Rainfall Hyetograph

Go Duration = Pulses of Time Interval*Time Interval

Time Interval of Rainfall Hyetograph

Go Time Interval = Duration/Pulses of Time Interval

Rainfall Intensity for Phi Index of Practical Use Formula

Intensity of Rainfall = (Φ-Index*24)+Runoff in Cm from 24h Rainfall
I = (φ*24)+R_24-h

What is Precipitation?

Precipitation is any product of the condensation of atmospheric water vapor that falls under gravitational pull from clouds. The main forms of precipitation include drizzling, rain, sleet, snow, ice pellets, graupel and hail.

What is φ-Index?

The φ-Index of a catchment is defined as the constant infiltration capacity that would yield the actual total runoff for a given rainfall amount. In principle, the magnitude of the φ index is bounded between the maximum and minimum average infiltration capacities of the catchment during a rainfall event.

How to Calculate Rainfall Intensity for Phi Index of Practical Use?

Rainfall Intensity for Phi Index of Practical Use calculator uses Intensity of Rainfall = (Φ-Index*24)+Runoff in Cm from 24h Rainfall to calculate the Intensity of Rainfall, The Rainfall Intensity for Phi Index of Practical Use formula is defined as the magnitude of the φ index is bounded between the maximum and minimum average infiltration capacities of the catchment during a rainfall event. Intensity of Rainfall is denoted by I symbol.

How to calculate Rainfall Intensity for Phi Index of Practical Use using this online calculator? To use this online calculator for Rainfall Intensity for Phi Index of Practical Use, enter Φ-Index (φ) & Runoff in Cm from 24h Rainfall (R_24-h) and hit the calculate button. Here is how the Rainfall Intensity for Phi Index of Practical Use calculation can be explained with given input values -> 287856 = (0.0279*24)+0.0013.

FAQ

What is Rainfall Intensity for Phi Index of Practical Use?

The Rainfall Intensity for Phi Index of Practical Use formula is defined as the magnitude of the φ index is bounded between the maximum and minimum average infiltration capacities of the catchment during a rainfall event and is represented as I = (φ*24)+R_24-h or Intensity of Rainfall = (Φ-Index*24)+Runoff in Cm from 24h Rainfall. Φ-Index of a catchment is the constant infiltration capacity that would yield the actual total runoff for a given rainfall amount & Runoff in Cm from 24h Rainfall of intensity in centimeters per hour (cm/hr).

How to calculate Rainfall Intensity for Phi Index of Practical Use?

The Rainfall Intensity for Phi Index of Practical Use formula is defined as the magnitude of the φ index is bounded between the maximum and minimum average infiltration capacities of the catchment during a rainfall event is calculated using Intensity of Rainfall = (Φ-Index*24)+Runoff in Cm from 24h Rainfall. To calculate Rainfall Intensity for Phi Index of Practical Use, you need Φ-Index (φ) & Runoff in Cm from 24h Rainfall (R_24-h). With our tool, you need to enter the respective value for Φ-Index & Runoff in Cm from 24h Rainfall 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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