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Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall. Check FAQs
tp=CrL(LbLcaSB)nB
tp - Basin Lag?CrL - Basin Constant?Lb - Length of Basin?Lca - Distance along Main Water Course?SB - Basin Slope?nB - Basin Constant 'n'?

Modified Equation for Basin Lag Example

With values
With units
Only example

Here is how the Modified Equation for Basin Lag equation looks like with Values.

Here is how the Modified Equation for Basin Lag equation looks like with Units.

Here is how the Modified Equation for Basin Lag equation looks like.

0.0363Edit=1.03Edit(30Edit12Edit1.1Edit)0.38Edit
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Modified Equation for Basin Lag Solution

Follow our step by step solution on how to calculate Modified Equation for Basin Lag?

FIRST Step Consider the formula
tp=CrL(LbLcaSB)nB
Next Step Substitute values of Variables
tp=1.03(30m12km1.1)0.38
Next Step Convert Units
tp=1.03(30m12000m1.1)0.38
Next Step Prepare to Evaluate
tp=1.03(30120001.1)0.38
Next Step Evaluate
tp=130.72768328481s
Next Step Convert to Output's Unit
tp=0.0363132453568916h
LAST Step Rounding Answer
tp=0.0363h

Modified Equation for Basin Lag Formula Elements

Variables
Functions
Basin Lag
Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.
Symbol: tp
Measurement: TimeUnit: h
Note: Value should be greater than 0.
Basin Constant
Basin Constant to determine the base lag with respect to basin slope.
Symbol: CrL
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Length of Basin
Length of Basin refers to the distance from one end of the basin to the other, typically measured along the longest axis.
Symbol: Lb
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Distance along Main Water Course
Distance along Main Water Course from the gauging station to a point opposite to the watershed centroid in km.
Symbol: Lca
Measurement: LengthUnit: km
Note: Value should be greater than 0.
Basin Slope
Basin Slope of the catchment under consideration.
Symbol: SB
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Basin Constant 'n'
Basin Constant 'n' to determine the base lag with respect to basin slope.
Symbol: nB
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
sqrt
A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.
Syntax: sqrt(Number)

Other Formulas to find Basin Lag

​Go Basin Lag given Modified Basin Lag
tp=t'p-(tR4)2122
​Go Basin Lag given Modified Basin Lag for Effective Duration
tp=4t'p+tr-tR4
​Go Basin Lag given Standard Duration of Effective Rainfall
tp=5.5tr
​Go Basin Lag given Peak Discharge
tp=2.78CpAQp

Other formulas in Synder's Synthetic Unit Hydrograph category

​Go Peak Discharge for Nonstandard Effective Rainfall
Qp=2.78CpAt'p
​Go Regional Constant given Peak Discharge for Nonstandard Effective Rainfall
Cp=Qpt'p2.78A
​Go Catchment Area given Peak Discharge for Nonstandard Effective Rainfall
A=Qpt'p2.78Cr
​Go Modified Basin Lag given Peak Discharge for Nonstandard Effective Rainfall
t'p=2.78CrAQp

How to Evaluate Modified Equation for Basin Lag?

Modified Equation for Basin Lag evaluator uses Basin Lag = Basin Constant*(Length of Basin*Distance along Main Water Course/sqrt(Basin Slope))^Basin Constant 'n' to evaluate the Basin Lag, The Modified Equation for Basin Lag formula is defined as the modified elapsed time between the occurrences of the centroids of the effective rainfall. Basin Lag is denoted by tp symbol.

How to evaluate Modified Equation for Basin Lag using this online evaluator? To use this online evaluator for Modified Equation for Basin Lag, enter Basin Constant (CrL), Length of Basin (Lb), Distance along Main Water Course (Lca), Basin Slope (SB) & Basin Constant 'n' (nB) and hit the calculate button.

FAQs on Modified Equation for Basin Lag

What is the formula to find Modified Equation for Basin Lag?
The formula of Modified Equation for Basin Lag is expressed as Basin Lag = Basin Constant*(Length of Basin*Distance along Main Water Course/sqrt(Basin Slope))^Basin Constant 'n'. Here is an example- 1E-5 = 1.03*(30*12000/sqrt(1.1))^0.38.
How to calculate Modified Equation for Basin Lag?
With Basin Constant (CrL), Length of Basin (Lb), Distance along Main Water Course (Lca), Basin Slope (SB) & Basin Constant 'n' (nB) we can find Modified Equation for Basin Lag using the formula - Basin Lag = Basin Constant*(Length of Basin*Distance along Main Water Course/sqrt(Basin Slope))^Basin Constant 'n'. This formula also uses Square Root Function function(s).
What are the other ways to Calculate Basin Lag?
Here are the different ways to Calculate Basin Lag-
  • Basin Lag=(Modified Basin Lag-(Non-standard rainfall duration/4))/(21/22)OpenImg
  • Basin Lag=(4*Modified Basin Lag+Standard Duration of Effective Rainfall-Non-standard rainfall duration)/4OpenImg
  • Basin Lag=5.5*Standard Duration of Effective RainfallOpenImg
Can the Modified Equation for Basin Lag be negative?
No, the Modified Equation for Basin Lag, measured in Time cannot be negative.
Which unit is used to measure Modified Equation for Basin Lag?
Modified Equation for Basin Lag is usually measured using the Hour[h] for Time. Second[h], Millisecond[h], Microsecond[h] are the few other units in which Modified Equation for Basin Lag can be measured.
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