Peak Rate of Runoff in Rational Formula Calculator

✖Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received.ⓘ Runoff Coefficient [C_r]			+10% -10%
✖Area of Catchment is an area of land where all water flows to a single stream, river, lake or even ocean.ⓘ Area of Catchment [A_c]			+10% -10%
✖Critical rainfall intensity is the precipitation rate at which surface runoff initiates, leading to increased risk of flooding or other hydrological hazards.ⓘ Critical Rainfall Intensity [P_c]			+10% -10%

✖The peak drainage discharge by Rational Formula estimates stormwater runoff using parameters such as rainfall intensity, catchment area, and runoff coefficient to determine the maximum flow rate.ⓘ Peak Rate of Runoff in Rational Formula [Q_R]

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Peak Rate of Runoff in Rational Formula

Formula

`"Q"_{"R"} = ("C"_{"r"}*"A"_{"c"}*"P"_{"c"})/36`

Example

`"4187.5m³/s"=("0.5"*"15ha"*"2.01cm/h")/36`

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Peak Rate of Runoff in Rational Formula Solution

STEP 0: Pre-Calculation Summary

Formula Used

Peak Drainage Discharge by Rational Formula = (Runoff Coefficient*Area of Catchment*Critical Rainfall Intensity)/36
Q_R = (C_r*A_c*P_c)/36
This formula uses 4 Variables

Variables Used

Peak Drainage Discharge by Rational Formula - (Measured in Cubic Meter per Second) - The peak drainage discharge by Rational Formula estimates stormwater runoff using parameters such as rainfall intensity, catchment area, and runoff coefficient to determine the maximum flow rate.
Runoff Coefficient - Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received.
Area of Catchment - (Measured in Square Meter) - Area of Catchment is an area of land where all water flows to a single stream, river, lake or even ocean.
Critical Rainfall Intensity - (Measured in Centimeter per Hour) - Critical rainfall intensity is the precipitation rate at which surface runoff initiates, leading to increased risk of flooding or other hydrological hazards.

STEP 1: Convert Input(s) to Base Unit

Runoff Coefficient: 0.5 --> No Conversion Required
Area of Catchment: 15 Hectare --> 150000 Square Meter (Check conversion here)
Critical Rainfall Intensity: 2.01 Centimeter per Hour --> 2.01 Centimeter per Hour No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Q_R = (C_r*A_c*P_c)/36 --> (0.5*150000*2.01)/36

Evaluating ... ...

Q_R = 4187.5

STEP 3: Convert Result to Output's Unit

4187.5 Cubic Meter per Second --> No Conversion Required

FINAL ANSWER

4187.5 Cubic Meter per Second <-- Peak Drainage Discharge by Rational Formula

(Calculation completed in 00.020 seconds)

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Created by Suraj Kumar

Birsa Institute of Technology (BIT), Sindri

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< 4 Peak Drainage Discharge by Rational Formula Calculators

Catchment Area given Peak Rate of Runoff and Rainfall Intensity

Go Area of Catchment = (36*Peak Drainage Discharge by Rational Formula)/(Runoff Coefficient*Critical Rainfall Intensity)

Critical Rainfall Intensity for Peak Rate of Runoff

Go Critical Rainfall Intensity = (36*Peak Drainage Discharge by Rational Formula)/(Area of Catchment*Runoff Coefficient)

Coefficient of Runoff given Peak Rate of Runoff

Go Runoff Coefficient = (36*Peak Drainage Discharge by Rational Formula)/(Area of Catchment*Critical Rainfall Intensity)

Peak Rate of Runoff in Rational Formula

Go Peak Drainage Discharge by Rational Formula = (Runoff Coefficient*Area of Catchment*Critical Rainfall Intensity)/36

Peak Rate of Runoff in Rational Formula Formula

Peak Drainage Discharge by Rational Formula = (Runoff Coefficient*Area of Catchment*Critical Rainfall Intensity)/36
Q_R = (C_r*A_c*P_c)/36

What is Peak Runoff ?

One of the key parameters in the design and analysis of soil and water conservation structures is the resulting peak runoff or the variations of runoff with time (hydrograph) at the watershed outlet.The maximum flow at outlet thus attained is called peak flow of runoff.

How to Calculate Peak Rate of Runoff in Rational Formula?

Peak Rate of Runoff in Rational Formula calculator uses Peak Drainage Discharge by Rational Formula = (Runoff Coefficient*Area of Catchment*Critical Rainfall Intensity)/36 to calculate the Peak Drainage Discharge by Rational Formula, The Peak Rate of Runoff in Rational Formula is defined as the peak rate of runoff when we have prior information of other parameters used in rational formula. Peak Drainage Discharge by Rational Formula is denoted by Q_R symbol.

How to calculate Peak Rate of Runoff in Rational Formula using this online calculator? To use this online calculator for Peak Rate of Runoff in Rational Formula, enter Runoff Coefficient (C_r), Area of Catchment (A_c) & Critical Rainfall Intensity (P_c) and hit the calculate button. Here is how the Peak Rate of Runoff in Rational Formula calculation can be explained with given input values -> 4166.667 = (0.5*150000*5.58333333333333E-06)/36.

FAQ

What is Peak Rate of Runoff in Rational Formula?

The Peak Rate of Runoff in Rational Formula is defined as the peak rate of runoff when we have prior information of other parameters used in rational formula and is represented as Q_R = (C_r*A_c*P_c)/36 or Peak Drainage Discharge by Rational Formula = (Runoff Coefficient*Area of Catchment*Critical Rainfall Intensity)/36. Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received, Area of Catchment is an area of land where all water flows to a single stream, river, lake or even ocean & Critical rainfall intensity is the precipitation rate at which surface runoff initiates, leading to increased risk of flooding or other hydrological hazards.

How to calculate Peak Rate of Runoff in Rational Formula?

The Peak Rate of Runoff in Rational Formula is defined as the peak rate of runoff when we have prior information of other parameters used in rational formula is calculated using Peak Drainage Discharge by Rational Formula = (Runoff Coefficient*Area of Catchment*Critical Rainfall Intensity)/36. To calculate Peak Rate of Runoff in Rational Formula, you need Runoff Coefficient (C_r), Area of Catchment (A_c) & Critical Rainfall Intensity (P_c). With our tool, you need to enter the respective value for Runoff Coefficient, Area of Catchment & Critical Rainfall Intensity 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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