Snyder's Equation Calculator

✖Regional Constant representing watershed slope and storage effect.ⓘ Regional Constant [C_r]			+10% -10%
✖Length of Basin refers to the distance from one end of the basin to the other, typically measured along the longest axis.ⓘ Length of Basin [L_b]			+10% -10%
✖Distance along Main Water Course from the gauging station to a point opposite to the watershed centroid in km.ⓘ Distance along Main Water Course [L_ca]			+10% -10%

✖Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.ⓘ Snyder's Equation [t_p]

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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
t_p = C_r*(L_b*L_ca)^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 refers to the distance from one end of the basin to the other, typically measured along the longest axis.
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

t_p = C_r*(L_b*L_ca)^0.3 --> 1.46*(0.03*12)^0.3

Evaluating ... ...

t_p = 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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Coorg Institute of Technology (CIT), Coorg

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< Synder's Synthetic Unit Hydrograph Calculators

Regional Constant given Peak Discharge for Nonstandard Effective Rainfall

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

Peak Discharge for Nonstandard Effective Rainfall

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

Catchment Area given Peak Discharge for Nonstandard Effective Rainfall

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

Modified Basin Lag given Peak Discharge for Nonstandard Effective Rainfall

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

Snyder's Equation Formula

LaTeX Go

Basin Lag = Regional Constant*(Length of Basin*Distance along Main Water Course)^0.3
t_p = C_r*(L_b*L_ca)^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 t_p symbol.

How to calculate Snyder's Equation using this online calculator? To use this online calculator for Snyder's Equation, enter Regional Constant (C_r), Length of Basin (L_b) & Distance along Main Water Course (L_ca) 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 t_p = C_r*(L_b*L_ca)^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 refers to the distance from one end of the basin to the other, typically measured along the longest axis & 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 (C_r), Length of Basin (L_b) & Distance along Main Water Course (L_ca). 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 3 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

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