Snyder's Equation for Peak Discharge Calculator

✖Regional Constant (Snyder) is considered an indication of the retention and storage capacity of the watershed.ⓘ Regional Constant (Snyder) [C_p]			+10% -10%
✖Area of catchment is the area from which rain flows into a particular river or lake.ⓘ Area of Catchment [A]			+10% -10%
✖Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.ⓘ Basin Lag [t_p]			+10% -10%

✖Peak Discharge is the maximum volume flow rate passing a particular location during an event.ⓘ Snyder's Equation for Peak Discharge [Q_p]

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Formula

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Snyder's Equation for Peak Discharge

Formula

`"Q"_{"p"} = 2.78*"C"_{"p"}*"A"/"t"_{"p"}`

Example

`"0.834m³/s"=2.78*"0.6"*"3.00km²"/"6h"`

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Snyder's Equation for Peak Discharge Solution

STEP 0: Pre-Calculation Summary

Formula Used

Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Basin Lag
Q_p = 2.78*C_p*A/t_p
This formula uses 4 Variables

Variables Used

Peak Discharge - (Measured in Cubic Meter per Second) - Peak Discharge is the maximum volume flow rate passing a particular location during an event.
Regional Constant (Snyder) - Regional Constant (Snyder) is considered an indication of the retention and storage capacity of the watershed.
Area of Catchment - (Measured in Square Kilometer) - Area of catchment is the area from which rain flows into a particular river or lake.
Basin Lag - (Measured in Hour) - Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.

STEP 1: Convert Input(s) to Base Unit

Regional Constant (Snyder): 0.6 --> No Conversion Required
Area of Catchment: 3 Square Kilometer --> 3 Square Kilometer No Conversion Required
Basin Lag: 6 Hour --> 6 Hour No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Q_p = 2.78*C_p*A/t_p --> 2.78*0.6*3/6

Evaluating ... ...

Q_p = 0.834

STEP 3: Convert Result to Output's Unit

0.834 Cubic Meter per Second --> No Conversion Required

FINAL ANSWER

0.834 Cubic Meter per Second <-- Peak Discharge

(Calculation completed in 00.004 seconds)

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Coorg Institute of Technology (CIT), Coorg

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< 25 Synder's Synthetic- Unit Hydrograph Calculators

Distance along Main Water Course from Gauging Station to Watershed

Go Distance along Main Water Course = (Basin Lag/Basin Constant/(Length of Basin/sqrt(Basin Slope))^Basin Constant 'n')^1/Basin Constant 'n'

Basin Length Measured along Water Course given Modified Equation for Basin Lag

Go Basin Length = (Basin Lag/Basin Constant)^(1/Basin Constant 'n')*(sqrt(Basin Slope)/Distance along Main Water Course)

Modified Equation for Basin Lag

Go Basin Lag = Basin Constant*(Length of Basin*Distance along Main Water Course/sqrt(Basin Slope))^Basin Constant 'n'

Basin Slope given Basin Lag

Go Basin Slope = ((Basin Length*Distance along Main Water Course)/((Basin Lag/Basin Constant)^(1/Basin Constant 'n')))^2

Basin Lag given Modified Basin Lag for Effective Duration

Go Basin Lag = (4*Modified Basin Lag+Standard Duration of Effective Rainfall-Non-standard rainfall duration)/4

Standard Duration of Effective Rainfall given Modified Basin Lag

Go Standard Duration of Effective Rainfall = Non-standard rainfall duration-4*(Modified Basin Lag-Basin Lag)

Modified Equation for Basin Lag for Effective Duration

Go Modified Basin Lag = Basin Lag+(Non-standard rainfall duration-Standard Duration of Effective Rainfall)/4

Equation for Catchment Parameter

Go Catchment Parameter = Length of Basin*Watershed Length/sqrt(Basin Slope)

Distance along Main Water Course from Gauging Station given Basin Lag

Go Distance along Main Water Course = ((Basin Lag/Regional Constant)^(1/0.3))*(1/Basin Length)

Regional Constant given Peak Discharge for Nonstandard Effective Rainfall

Go Regional Constant (Snyder) = Peak Discharge*Modified Basin Lag/(2.78*Area of Catchment)

Basin Length Measured along Water Course given Basin Lag

Go Basin Length = (Basin Lag/Regional Constant)^1/0.3*(1/Distance along Main Water Course)

Peak Discharge for Nonstandard Effective Rainfall

Go Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Modified Basin Lag

Regional Constant representing Watershed Slope and Storage Effects

Go Regional Constant = Basin Lag/(Length of Basin*Distance along Main Water Course)^0.3

Snyder's Equation

Go Basin Lag = Regional Constant*(Length of Basin*Distance along Main Water Course)^0.3

Catchment Area given Peak Discharge for Nonstandard Effective Rainfall

Go Area of Catchment = Peak Discharge*Modified Basin Lag/(2.78*Regional Constant)

Catchment Area given Peak Discharge of Unit Hydrograph

Go Area of Catchment = Peak Discharge*Basin Lag/(2.78*Regional Constant (Snyder))

Modified Basin Lag given Peak Discharge for Nonstandard Effective Rainfall

Go Modified Basin Lag = 2.78*Regional Constant*Area of Catchment/Peak Discharge

Snyder's Equation for Peak Discharge

Go Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Basin Lag

Basin Lag given Peak Discharge

Go Basin Lag = 2.78*Regional Constant (Snyder)*Area of Catchment/Peak Discharge

Regional Constant given Peak Discharge

Go Regional Constant = Peak Discharge*Basin Lag/2.78*Catchment Area

Basin Lag given Modified Basin Lag

Go Basin Lag = (Modified Basin Lag-(Non-standard rainfall duration/4))/(21/22)

Non-Standard Rainfall Duration given Modified Basin Lag

Go Non-standard rainfall duration = (Modified Basin Lag-(21/22)*Basin Lag)*4

Modified Basin Lag for Effective Duration

Go Modified Basin Lag = (21*Basin Lag/22)+(Non-standard rainfall duration/4)

Snyder's Equation for Standard Duration of Effective Rainfall

Go Standard Duration of Effective Rainfall = Basin Lag/5.5

Basin Lag given Standard Duration of Effective Rainfall

Go Basin Lag = 5.5*Standard Duration of Effective Rainfall

Snyder's Equation for Peak Discharge Formula

Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Basin Lag
Q_p = 2.78*C_p*A/t_p

What is Peak Flood Discharge?

In hydrology, the term peak discharge stands for the highest concentration of runoff from the basin area. The concentrated flow of the basin greatly exaggerated and overtops the natural or artificial bank, and this might be called flood.

Which factors influence the amount of effective rainfall?

The fraction of effective rainfall increases with increased water-holding capacity in the soil. The amount of water held and retained by a soil depends upon its depth, texture, structure, and organic matter content, the finer the texture, the greater the storage capacity.

How to Calculate Snyder's Equation for Peak Discharge?

Snyder's Equation for Peak Discharge calculator uses Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Basin Lag to calculate the Peak Discharge, The Snyder's Equation for Peak Discharge formula is defined as the maximum volume flow rate passing a particular location during a storm event. Peak Discharge is denoted by Q_p symbol.

How to calculate Snyder's Equation for Peak Discharge using this online calculator? To use this online calculator for Snyder's Equation for Peak Discharge, enter Regional Constant (Snyder) (C_p), Area of Catchment (A) & Basin Lag (t_p) and hit the calculate button. Here is how the Snyder's Equation for Peak Discharge calculation can be explained with given input values -> 0.834 = 2.78*0.6*3000000/21600.

FAQ

What is Snyder's Equation for Peak Discharge?

The Snyder's Equation for Peak Discharge formula is defined as the maximum volume flow rate passing a particular location during a storm event and is represented as Q_p = 2.78*C_p*A/t_p or Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Basin Lag. Regional Constant (Snyder) is considered an indication of the retention and storage capacity of the watershed, Area of catchment is the area from which rain flows into a particular river or lake & Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.

How to calculate Snyder's Equation for Peak Discharge?

The Snyder's Equation for Peak Discharge formula is defined as the maximum volume flow rate passing a particular location during a storm event is calculated using Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Basin Lag. To calculate Snyder's Equation for Peak Discharge, you need Regional Constant (Snyder) (C_p), Area of Catchment (A) & Basin Lag (t_p). With our tool, you need to enter the respective value for Regional Constant (Snyder), Area of Catchment & Basin Lag 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 Peak Discharge?

In this formula, Peak Discharge uses Regional Constant (Snyder), Area of Catchment & Basin Lag. We can use 1 other way(s) to calculate the same, which is/are as follows -

Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Modified Basin Lag

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