Snyder's Equation for Standard Duration of Effective Rainfall Calculator

Standard Duration of Effective Rainfall - (Measured in Second) - Standard Duration of Effective Rainfall as adopted by Snyder.
Basin Lag - (Measured in Second) - Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.

STEP 1: Convert Input(s) to Base Unit

Basin Lag: 6 Hour --> 21600 Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

t_r = t_p/5.5 --> 21600/5.5

Evaluating ... ...

t_r = 3927.27272727273

STEP 3: Convert Result to Output's Unit

3927.27272727273 Second -->1.09090909090909 Hour (Check conversion here)

FINAL ANSWER

1.09090909090909 ≈ 1.090909 Hour <-- Standard Duration of Effective Rainfall

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Engineering Hydrology » Hydrographs » Synthetic Unit Hydrograph » Synder's Synthetic- Unit Hydrograph » Snyder's Equation for Standard Duration of Effective Rainfall

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Created by Mithila Muthamma PA

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 Standard Duration of Effective Rainfall Formula

Standard Duration of Effective Rainfall = Basin Lag/5.5
t_r = t_p/5.5

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.

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.

How to Calculate Snyder's Equation for Standard Duration of Effective Rainfall?

Snyder's Equation for Standard Duration of Effective Rainfall calculator uses Standard Duration of Effective Rainfall = Basin Lag/5.5 to calculate the Standard Duration of Effective Rainfall, The Snyder's Equation for Standard Duration of Effective Rainfall formula is the duration for when precipitation is equal to the difference between total rainfall and actual evapotranspiration. At ground level, water from effective rainfall is split into two fractions: surface run-off and infiltration. Standard Duration of Effective Rainfall is denoted by t_r symbol.

How to calculate Snyder's Equation for Standard Duration of Effective Rainfall using this online calculator? To use this online calculator for Snyder's Equation for Standard Duration of Effective Rainfall, enter Basin Lag (t_p) and hit the calculate button. Here is how the Snyder's Equation for Standard Duration of Effective Rainfall calculation can be explained with given input values -> 0.000303 = 21600/5.5.

FAQ

What is Snyder's Equation for Standard Duration of Effective Rainfall?

The Snyder's Equation for Standard Duration of Effective Rainfall formula is the duration for when precipitation is equal to the difference between total rainfall and actual evapotranspiration. At ground level, water from effective rainfall is split into two fractions: surface run-off and infiltration and is represented as t_r = t_p/5.5 or Standard Duration of Effective Rainfall = Basin Lag/5.5. Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.

How to calculate Snyder's Equation for Standard Duration of Effective Rainfall?

The Snyder's Equation for Standard Duration of Effective Rainfall formula is the duration for when precipitation is equal to the difference between total rainfall and actual evapotranspiration. At ground level, water from effective rainfall is split into two fractions: surface run-off and infiltration is calculated using Standard Duration of Effective Rainfall = Basin Lag/5.5. To calculate Snyder's Equation for Standard Duration of Effective Rainfall, you need Basin Lag (t_p). With our tool, you need to enter the respective value for 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 Standard Duration of Effective Rainfall?

In this formula, Standard Duration of Effective Rainfall uses Basin Lag. We can use 2 other way(s) to calculate the same, which is/are as follows -

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

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