Snyder's Equation Solution

STEP 0: Pre-Calculation Summary
Formula Used
Basin Lag = Regional Constant*(Length of Basin*Distance along Main Water Course)^0.3
tp = Cr*(Lb*Lca)^0.3
This formula uses 4 Variables
Variables Used
Basin Lag - (Measured in Hour) - Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.
Regional Constant - Regional Constant representing watershed slope and storage effect.
Length of Basin - (Measured in Kilometer) - Length of Basin or length of the drainage basin in kilometres.
Distance along Main Water Course - (Measured in Kilometer) - Distance along Main Water Course from the gauging station to a point opposite to the watershed centroid in km.
STEP 1: Convert Input(s) to Base Unit
Regional Constant: 1.46 --> No Conversion Required
Length of Basin: 30 Meter --> 0.03 Kilometer (Check conversion here)
Distance along Main Water Course: 12 Kilometer --> 12 Kilometer No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
tp = Cr*(Lb*Lca)^0.3 --> 1.46*(0.03*12)^0.3
Evaluating ... ...
tp = 1.07459200731404
STEP 3: Convert Result to Output's Unit
3868.53122633053 Second -->1.07459200731404 Hour (Check conversion here)
FINAL ANSWER
1.07459200731404 1.074592 Hour <-- Basin Lag
(Calculation completed in 00.004 seconds)

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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 Formula

Basin Lag = Regional Constant*(Length of Basin*Distance along Main Water Course)^0.3
tp = Cr*(Lb*Lca)^0.3

What is Baseflow?

Baseflow is a portion of streamflow that is not directly generated from the excess rainfall during a storm event. In other words, this is the flow that would exist in the stream without the contribution of direct runoff from the rainfall.

What is Lag Time in hydrology?

The lag time is the delay between the maximum rainfall amount and the peak discharge. The shape of a hydrograph varies in each river basin and each individual storm event. This increases lag time. The peak discharge is also lower as it takes water longer to reach the river channel.

How to Calculate Snyder's Equation?

Snyder's Equation calculator uses Basin Lag = Regional Constant*(Length of Basin*Distance along Main Water Course)^0.3 to calculate the Basin Lag, The Snyder's Equation formula is defined as the elapsed time between the occurrences of the centroids of the effective rainfall. Basin Lag is denoted by tp symbol.

How to calculate Snyder's Equation using this online calculator? To use this online calculator for Snyder's Equation, enter Regional Constant (Cr), Length of Basin (Lb) & Distance along Main Water Course (Lca) and hit the calculate button. Here is how the Snyder's Equation calculation can be explained with given input values -> 0.018834 = 1.46*(30*12000)^0.3.

FAQ

What is Snyder's Equation?
The Snyder's Equation formula is defined as the elapsed time between the occurrences of the centroids of the effective rainfall and is represented as tp = Cr*(Lb*Lca)^0.3 or Basin Lag = Regional Constant*(Length of Basin*Distance along Main Water Course)^0.3. Regional Constant representing watershed slope and storage effect, Length of Basin or length of the drainage basin in kilometres & Distance along Main Water Course from the gauging station to a point opposite to the watershed centroid in km.
How to calculate Snyder's Equation?
The Snyder's Equation formula is defined as the elapsed time between the occurrences of the centroids of the effective rainfall is calculated using Basin Lag = Regional Constant*(Length of Basin*Distance along Main Water Course)^0.3. To calculate Snyder's Equation, you need Regional Constant (Cr), Length of Basin (Lb) & Distance along Main Water Course (Lca). With our tool, you need to enter the respective value for Regional Constant, Length of Basin & Distance along Main Water Course 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 Basin Lag?
In this formula, Basin Lag uses Regional Constant, Length of Basin & Distance along Main Water Course. We can use 5 other way(s) to calculate the same, which is/are as follows -
  • Basin Lag = (Modified Basin Lag-(Non-standard rainfall duration/4))/(21/22)
  • Basin Lag = (4*Modified Basin Lag+Standard Duration of Effective Rainfall-Non-standard rainfall duration)/4
  • Basin Lag = 5.5*Standard Duration of Effective Rainfall
  • Basin Lag = 2.78*Regional Constant (Snyder)*Area of Catchment/Peak Discharge
  • Basin Lag = Basin Constant*(Length of Basin*Distance along Main Water Course/sqrt(Basin Slope))^Basin Constant 'n'
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