Stormwater Flow Calculator

✖Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received.ⓘ Runoff Coefficient [C_r]			+10% -10%
✖Average Rainfall Rate is a measure of the intensity of rainfall by calculating the amount of rain that would fall over a given interval of time.ⓘ Average Rainfall Rate [I]			+10% -10%
✖Drainage Area the land area where precipitation falls off into creeks, streams, rivers, lakes, and reservoirs.ⓘ Drainage Area [A]			+10% -10%

✖Peak Rate of Runoff is the maximum rate of discharge during the period of runoff caused by a storm.ⓘ Stormwater Flow [q_p]

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Formula

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Stormwater Flow

Formula

`"q"_{"p"} = "C"_{"r"}*"I"*"A"`

Example

`"1.25m³/s"="0.5"*"0.05m/s"*"50m²"`

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Stormwater Flow Solution

STEP 0: Pre-Calculation Summary

Formula Used

Peak Rate of Runoff = Runoff Coefficient*Average Rainfall Rate*Drainage Area
q_p = C_r*I*A
This formula uses 4 Variables

Variables Used

Peak Rate of Runoff - (Measured in Cubic Meter per Second) - Peak Rate of Runoff is the maximum rate of discharge during the period of runoff caused by a storm.
Runoff Coefficient - Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received.
Average Rainfall Rate - (Measured in Meter per Second) - Average Rainfall Rate is a measure of the intensity of rainfall by calculating the amount of rain that would fall over a given interval of time.
Drainage Area - (Measured in Square Meter) - Drainage Area the land area where precipitation falls off into creeks, streams, rivers, lakes, and reservoirs.

STEP 1: Convert Input(s) to Base Unit

Runoff Coefficient: 0.5 --> No Conversion Required
Average Rainfall Rate: 0.05 Meter per Second --> 0.05 Meter per Second No Conversion Required
Drainage Area: 50 Square Meter --> 50 Square Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

q_p = C_r*I*A --> 0.5*0.05*50

Evaluating ... ...

q_p = 1.25

STEP 3: Convert Result to Output's Unit

1.25 Cubic Meter per Second --> No Conversion Required

FINAL ANSWER

1.25 Cubic Meter per Second <-- Peak Rate of Runoff

(Calculation completed in 00.004 seconds)

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Credits

Created by Ishita Goyal

Meerut Institute of Engineering and Technology (MIET), Meerut

Ishita Goyal has created this Calculator and 500+ more calculators!

Verified by Himanshi Sharma

Bhilai Institute of Technology (BIT), Raipur

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< 4 Determining storm water flow Calculators

Average Rainfall Rate given Storm water

Go Average Rainfall Rate = Peak Rate of Runoff/(Runoff Coefficient*Drainage Area)

Coefficient of Runoff given Stormwater

Go Runoff Coefficient = Peak Rate of Runoff/(Average Rainfall Rate*Drainage Area)

Drainage Area given Stormwater

Go Drainage Area = Peak Rate of Runoff/(Runoff Coefficient*Average Rainfall Rate)

Stormwater Flow

Go Peak Rate of Runoff = Runoff Coefficient*Average Rainfall Rate*Drainage Area

Stormwater Flow Formula

Peak Rate of Runoff = Runoff Coefficient*Average Rainfall Rate*Drainage Area
q_p = C_r*I*A

What is Storm Water?

Storm water is water that originates from rain, including snow and ice melt. Stormwater can soak into the soil (infiltrate), be stored on the land surface in ponds and puddles, evaporate, or contribute to surface runoff.

How to Calculate Stormwater Flow?

Stormwater Flow calculator uses Peak Rate of Runoff = Runoff Coefficient*Average Rainfall Rate*Drainage Area to calculate the Peak Rate of Runoff, Stormwater flow is defined as the amount of storm water that has been collected due to excessive rainfall. Peak Rate of Runoff is denoted by q_p symbol.

How to calculate Stormwater Flow using this online calculator? To use this online calculator for Stormwater Flow, enter Runoff Coefficient (C_r), Average Rainfall Rate (I) & Drainage Area (A) and hit the calculate button. Here is how the Stormwater Flow calculation can be explained with given input values -> 1.25 = 0.5*0.05*50.

FAQ

What is Stormwater Flow?

Stormwater flow is defined as the amount of storm water that has been collected due to excessive rainfall and is represented as q_p = C_r*I*A or Peak Rate of Runoff = Runoff Coefficient*Average Rainfall Rate*Drainage Area. Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received, Average Rainfall Rate is a measure of the intensity of rainfall by calculating the amount of rain that would fall over a given interval of time & Drainage Area the land area where precipitation falls off into creeks, streams, rivers, lakes, and reservoirs.

How to calculate Stormwater Flow?

Stormwater flow is defined as the amount of storm water that has been collected due to excessive rainfall is calculated using Peak Rate of Runoff = Runoff Coefficient*Average Rainfall Rate*Drainage Area. To calculate Stormwater Flow, you need Runoff Coefficient (C_r), Average Rainfall Rate (I) & Drainage Area (A). With our tool, you need to enter the respective value for Runoff Coefficient, Average Rainfall Rate & Drainage Area 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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