Drainage Area when Peak Discharge is Considered Solution

STEP 0: Pre-Calculation Summary
Formula Used
Drainage Area = Peak Discharge/(Intensity of Rainfall*Runoff Coefficient)
AD = Qp/(i*Cr)
This formula uses 4 Variables
Variables Used
Drainage Area - (Measured in Square Meter) - Drainage Area is the total surface area, where the water from rain which is not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point.
Peak Discharge - (Measured in Cubic Meter per Second) - Peak Discharge is the maximum volume flow rate passing a particular location during an event.
Intensity of Rainfall - (Measured in Meter per Second) - 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.
Runoff Coefficient - Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received.
STEP 1: Convert Input(s) to Base Unit
Peak Discharge: 4 Cubic Meter per Second --> 4 Cubic Meter per Second No Conversion Required
Intensity of Rainfall: 1.6 Millimeter per Hour --> 4.44444444444444E-07 Meter per Second (Check conversion ​here)
Runoff Coefficient: 0.5 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
AD = Qp/(i*Cr) --> 4/(4.44444444444444E-07*0.5)
Evaluating ... ...
AD = 18000000
STEP 3: Convert Result to Output's Unit
18000000 Square Meter -->18 Square Kilometer (Check conversion ​here)
FINAL ANSWER
18 Square Kilometer <-- Drainage Area
(Calculation completed in 00.004 seconds)

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Rational Method to Estimate the Flood Peak Calculators

Intensity of Rainfall when Peak Discharge is Considered
​ LaTeX ​ Go Intensity of Rainfall = Peak Discharge/(Runoff Coefficient*Drainage Area)
Coefficient of Runoff when Peak Value is Considered
​ LaTeX ​ Go Runoff Coefficient = Peak Discharge/(Drainage Area*Intensity of Rainfall)
Drainage Area when Peak Discharge is Considered
​ LaTeX ​ Go Drainage Area = Peak Discharge/(Intensity of Rainfall*Runoff Coefficient)
Value of Peak Discharge
​ LaTeX ​ Go Peak Discharge = Runoff Coefficient*Drainage Area*Intensity of Rainfall

Drainage Area when Peak Discharge is Considered Formula

​LaTeX ​Go
Drainage Area = Peak Discharge/(Intensity of Rainfall*Runoff Coefficient)
AD = Qp/(i*Cr)

What is Surface Runoff & Drainage Area?

Surface runoff is water, from rain, snowmelt, or other sources, that flows over the land surface, and is a major component of the water cycle. Runoff that occurs on surfaces before reaching a channel is also called overland flow. A land area which produces runoff draining to a common point is called a watershed.
A Drainage area is the total surface area, upstream of a point on a stream, where the water from rain, snowmelt, or irrigation which is not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point.

What is Peak Discharge & explain use of Runoff Coefficient?

The maximum rate of discharge during the period of runoff caused by a storm is called a peak flow. The information about peak flows and associated volume of runoff during various floods that have been observed in the past can be compiled by the analysis of the observed discharge data and runoff hydrographs.
Runoff coefficient is a dimensionless factor that is used to convert the rainfall amounts to runoff. It represents the integrated effect of catchment losses and hence depends upon the nature of the land surface, slope, degree of saturation, and rainfall intensity. It is a larger value for areas with low infiltration and high runoff (pavement, steep gradient), and lower for permeable, well-vegetated areas (forest, flat land).

How to Calculate Drainage Area when Peak Discharge is Considered?

Drainage Area when Peak Discharge is Considered calculator uses Drainage Area = Peak Discharge/(Intensity of Rainfall*Runoff Coefficient) to calculate the Drainage Area, The Drainage Area when Peak Discharge is Considered formula is defined as the total surface area, upstream of a point on a stream, where the water from rain, snowmelt, or irrigation which is not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point. Drainage Area is denoted by AD symbol.

How to calculate Drainage Area when Peak Discharge is Considered using this online calculator? To use this online calculator for Drainage Area when Peak Discharge is Considered, enter Peak Discharge (Qp), Intensity of Rainfall (i) & Runoff Coefficient (Cr) and hit the calculate button. Here is how the Drainage Area when Peak Discharge is Considered calculation can be explained with given input values -> 1.8E-5 = 4/(4.44444444444444E-07*0.5).

FAQ

What is Drainage Area when Peak Discharge is Considered?
The Drainage Area when Peak Discharge is Considered formula is defined as the total surface area, upstream of a point on a stream, where the water from rain, snowmelt, or irrigation which is not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point and is represented as AD = Qp/(i*Cr) or Drainage Area = Peak Discharge/(Intensity of Rainfall*Runoff Coefficient). Peak Discharge is the maximum volume flow rate passing a particular location during an event, 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 & Runoff Coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received.
How to calculate Drainage Area when Peak Discharge is Considered?
The Drainage Area when Peak Discharge is Considered formula is defined as the total surface area, upstream of a point on a stream, where the water from rain, snowmelt, or irrigation which is not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point is calculated using Drainage Area = Peak Discharge/(Intensity of Rainfall*Runoff Coefficient). To calculate Drainage Area when Peak Discharge is Considered, you need Peak Discharge (Qp), Intensity of Rainfall (i) & Runoff Coefficient (Cr). With our tool, you need to enter the respective value for Peak Discharge, Intensity of Rainfall & Runoff Coefficient and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Drainage Area?
In this formula, Drainage Area uses Peak Discharge, Intensity of Rainfall & Runoff Coefficient. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • Drainage Area = Peak Discharge/((1/3.6)*Mean Intensity of Precipitation*Runoff Coefficient)
  • Drainage Area = Peak Discharge/((1/3.6)*Mean Intensity of Precipitation*Runoff Coefficient)
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