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Modified Basin Lag given Time Base Calculator

✖Time Base is the time from which the direct runoff begins until the direct-runoff.ⓘ Time Base [t_b]

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✖Modified Basin Lag for an effective duration rainfall.ⓘ Modified Basin Lag given Time Base [t'_p]

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Formula

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Modified Basin Lag given Time Base

Formula

t' p = \frac{t b - 72}{3}

Example

6 h = \frac{90 h - 72}{3}

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Modified Basin Lag given Time Base Solution

STEP 0: Pre-Calculation Summary

Formula Used

Modified Basin Lag = (Time Base-72)/3
t'_p = (t_b-72)/3
This formula uses 2 Variables

Variables Used

Modified Basin Lag - (Measured in Hour) - Modified Basin Lag for an effective duration rainfall.
Time Base - (Measured in Hour) - Time Base is the time from which the direct runoff begins until the direct-runoff.

STEP 1: Convert Input(s) to Base Unit

Time Base: 90 Hour --> 90 Hour No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

t'_p = (t_b-72)/3 --> (90-72)/3

Evaluating ... ...

t'_p = 6

STEP 3: Convert Result to Output's Unit

21600 Second -->6 Hour (Check conversion here)

FINAL ANSWER

6 Hour <-- Modified Basin Lag

(Calculation completed in 00.004 seconds)

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Created by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

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NSS College of Engineering (NSSCE), Palakkad

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< Synder's Synthetic Unit Hydrograph Calculators

Regional Constant given Peak Discharge for Nonstandard Effective Rainfall

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

Peak Discharge for Nonstandard Effective Rainfall

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

Catchment Area given Peak Discharge for Nonstandard Effective Rainfall

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

Modified Basin Lag given Peak Discharge for Nonstandard Effective Rainfall

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

Modified Basin Lag given Time Base Formula

Modified Basin Lag = (Time Base-72)/3
t'_p = (t_b-72)/3

What is difference between Synthetic Unit Hydrograph & Unit Hydrograph?

A Synthetic Unit Hydrograph retains all the features of the unit hydrograph but does not require rainfall-runoff data. A synthetic unit hydrograph is derived from theory and experience, and its purpose is to simulate basin diffusion by estimating the basin lag based on a certain formula or procedure.
A Unit Hydrograph shows the temporal change in flow, or discharge, per unit of runoff. In other words, how the flow of a stream will be affected over time by the addition of one unit of runoff. The unit hydrograph is a useful tool in the process of predicting the impact of precipitation on streamflow.

What is Basin Lag?

Basin lag time, defined as the elapsed time between the occurrences of the centroids of the effective rainfall and the storm runoff hydrograph, is an important factor in determining the time to peak of the unit hydrograph and the intensity of peak discharge.

How to Calculate Modified Basin Lag given Time Base?

Modified Basin Lag given Time Base calculator uses Modified Basin Lag = (Time Base-72)/3 to calculate the Modified Basin Lag, The Modified Basin Lag given Time Base formula is defined as the elapsed time between the occurrences of the centroids of the effective rainfall. Modified Basin Lag is denoted by t'_p symbol.

How to calculate Modified Basin Lag given Time Base using this online calculator? To use this online calculator for Modified Basin Lag given Time Base, enter Time Base (t_b) and hit the calculate button. Here is how the Modified Basin Lag given Time Base calculation can be explained with given input values -> 0.001667 = (324000-72)/3.

FAQ

What is Modified Basin Lag given Time Base?

The Modified Basin Lag given Time Base formula is defined as the elapsed time between the occurrences of the centroids of the effective rainfall and is represented as t'_p = (t_b-72)/3 or Modified Basin Lag = (Time Base-72)/3. Time Base is the time from which the direct runoff begins until the direct-runoff.

How to calculate Modified Basin Lag given Time Base?

The Modified Basin Lag given Time Base formula is defined as the elapsed time between the occurrences of the centroids of the effective rainfall is calculated using Modified Basin Lag = (Time Base-72)/3. To calculate Modified Basin Lag given Time Base, you need Time Base (t_b). With our tool, you need to enter the respective value for Time Base 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 Modified Basin Lag?

In this formula, Modified Basin Lag uses Time Base. We can use 3 other way(s) to calculate the same, which is/are as follows -

Modified Basin Lag = 2.78*Regional Constant*Area of Catchment/Peak Discharge
Modified Basin Lag = (21*Basin Lag/22)+(Non-standard rainfall duration/4)
Modified Basin Lag = Basin Lag+(Non-standard rainfall duration-Standard Duration of Effective Rainfall)/4

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