Inlet Time or Time of Equilibrium Calculator

✖Length of Overland Flow is a length of water over the ground before it gets concentrated into certain stream channels.ⓘ Length of Overland Flow [L_ob]			+10% -10%
✖Fall of Level from the critical point to the point of mouth of drain.ⓘ Fall of Level [H]			+10% -10%

✖Inlet Time is the time taken by water to flow overland.ⓘ Inlet Time or Time of Equilibrium [T_i]

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Inlet Time or Time of Equilibrium Solution

STEP 0: Pre-Calculation Summary

Formula Used

Inlet Time = (0.885*((Length of Overland Flow)^3/Fall of Level))^0.385
T_i = (0.885*((L_ob)^3/H))^0.385
This formula uses 3 Variables

Variables Used

Inlet Time - (Measured in Second) - Inlet Time is the time taken by water to flow overland.
Length of Overland Flow - (Measured in Meter) - Length of Overland Flow is a length of water over the ground before it gets concentrated into certain stream channels.
Fall of Level - (Measured in Meter) - Fall of Level from the critical point to the point of mouth of drain.

STEP 1: Convert Input(s) to Base Unit

Length of Overland Flow: 4 Kilometer --> 4000 Meter (Check conversion here)
Fall of Level: 10.05 Meter --> 10.05 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T_i = (0.885*((L_ob)^3/H))^0.385 --> (0.885*((4000)^3/10.05))^0.385

Evaluating ... ...

T_i = 5676.99504842391

STEP 3: Convert Result to Output's Unit

5676.99504842391 Second -->94.6165841403986 Minute (Check conversion here)

FINAL ANSWER

94.6165841403986 ≈ 94.61658 Minute <-- Inlet Time

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Environmental Engineering » Estimating the Peak Drainage Discharge » Channel Flow Time and Time of Concentration » Inlet Time or Time of Equilibrium

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Created by Suraj Kumar

Birsa Institute of Technology (BIT), Sindri

Suraj Kumar has created this Calculator and 2100+ more calculators!

Verified by Ishita Goyal

Meerut Institute of Engineering and Technology (MIET), Meerut

Ishita Goyal has verified this Calculator and 2600+ more calculators!

< Channel Flow Time and Time of Concentration Calculators

Inlet Time or Time of Equilibrium

LaTeX Go Inlet Time = (0.885*((Length of Overland Flow)^3/Fall of Level))^0.385

Velocity in Drain given Channel Flow Time

LaTeX Go Velocity in Drain = Length of Drain/Channel Flow Time

Length of Drain given Channel Flow Time

LaTeX Go Length of Drain = Channel Flow Time*Velocity in Drain

Channel Flow Time or Gutter Flow Time

LaTeX Go Channel Flow Time = Length of Drain/Velocity in Drain

Inlet Time or Time of Equilibrium Formula

LaTeX Go

Inlet Time = (0.885*((Length of Overland Flow)^3/Fall of Level))^0.385
T_i = (0.885*((L_ob)^3/H))^0.385

What is Inlet Time ?

The time required for the rain in falling on the most remote point of the tributary area to flow across the ground surface along the natural drains or gutters up to inlet of sewer is called inlet time.

How to Calculate Inlet Time or Time of Equilibrium?

Inlet Time or Time of Equilibrium calculator uses Inlet Time = (0.885*((Length of Overland Flow)^3/Fall of Level))^0.385 to calculate the Inlet Time, The Inlet Time or Time of Equilibrium formula is defined as the time required for the rain in falling on the most remote point of the tributary area. Inlet Time is denoted by T_i symbol.

How to calculate Inlet Time or Time of Equilibrium using this online calculator? To use this online calculator for Inlet Time or Time of Equilibrium, enter Length of Overland Flow (L_ob) & Fall of Level (H) and hit the calculate button. Here is how the Inlet Time or Time of Equilibrium calculation can be explained with given input values -> 1.579974 = (0.885*((4000)^3/10.05))^0.385.

FAQ

What is Inlet Time or Time of Equilibrium?

The Inlet Time or Time of Equilibrium formula is defined as the time required for the rain in falling on the most remote point of the tributary area and is represented as T_i = (0.885*((L_ob)^3/H))^0.385 or Inlet Time = (0.885*((Length of Overland Flow)^3/Fall of Level))^0.385. Length of Overland Flow is a length of water over the ground before it gets concentrated into certain stream channels & Fall of Level from the critical point to the point of mouth of drain.

How to calculate Inlet Time or Time of Equilibrium?

The Inlet Time or Time of Equilibrium formula is defined as the time required for the rain in falling on the most remote point of the tributary area is calculated using Inlet Time = (0.885*((Length of Overland Flow)^3/Fall of Level))^0.385. To calculate Inlet Time or Time of Equilibrium, you need Length of Overland Flow (L_ob) & Fall of Level (H). With our tool, you need to enter the respective value for Length of Overland Flow & Fall of Level 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 Inlet Time?

In this formula, Inlet Time uses Length of Overland Flow & Fall of Level. We can use 1 other way(s) to calculate the same, which is/are as follows -

Inlet Time = Time of Concentration-Channel Flow Time

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