Measured Unsteady Flow Calculator

✖The normal discharge at a given stage under steady uniform flow.ⓘ Normal Discharge [Q_n]			+10% -10%
✖Velocity of Flood Wave in the channel.ⓘ Velocity of Flood Wave [v_W]			+10% -10%
✖Channel Slope is how far a channel drops over a horizontal distance.ⓘ Channel Slope [S_o]			+10% -10%
✖Rate of Change of Stage in the channel.ⓘ Rate of Change of Stage [dh_/dt]			+10% -10%

✖Measured Unsteady Flow at a certain velocity.ⓘ Measured Unsteady Flow [Q_M]

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Measured Unsteady Flow Solution

STEP 0: Pre-Calculation Summary

Formula Used

Measured Unsteady Flow = Normal Discharge*sqrt(1+(1/(Velocity of Flood Wave*Channel Slope))*Rate of Change of Stage)
Q_M = Q_n*sqrt(1+(1/(v_W*S_o))*dh_/dt)
This formula uses 1 Functions, 5 Variables

Functions Used

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., sqrt(Number)

Variables Used

Measured Unsteady Flow - (Measured in Cubic Meter per Second) - Measured Unsteady Flow at a certain velocity.
Normal Discharge - (Measured in Cubic Meter per Second) - The normal discharge at a given stage under steady uniform flow.
Velocity of Flood Wave - (Measured in Meter per Second) - Velocity of Flood Wave in the channel.
Channel Slope - Channel Slope is how far a channel drops over a horizontal distance.
Rate of Change of Stage - Rate of Change of Stage in the channel.

STEP 1: Convert Input(s) to Base Unit

Normal Discharge: 12 Cubic Meter per Second --> 12 Cubic Meter per Second No Conversion Required
Velocity of Flood Wave: 50 Meter per Second --> 50 Meter per Second No Conversion Required
Channel Slope: 0.1 --> No Conversion Required
Rate of Change of Stage: 2.2 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Q_M = Q_n*sqrt(1+(1/(v_W*S_o))*dh_/dt) --> 12*sqrt(1+(1/(50*0.1))*2.2)

Evaluating ... ...

Q_M = 14.4

STEP 3: Convert Result to Output's Unit

14.4 Cubic Meter per Second --> No Conversion Required

FINAL ANSWER

14.4 Cubic Meter per Second <-- Measured Unsteady Flow

(Calculation completed in 00.020 seconds)

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Coorg Institute of Technology (CIT), Coorg

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LaTeX Go Actual Discharge = Normalized Discharge*(Actual Fall/Normalized Value of Fall)^Exponent on Rating Curve

Measured Unsteady Flow Formula

LaTeX Go

Measured Unsteady Flow = Normal Discharge*sqrt(1+(1/(Velocity of Flood Wave*Channel Slope))*Rate of Change of Stage)
Q_M = Q_n*sqrt(1+(1/(v_W*S_o))*dh_/dt)

What is Unsteady Flow?

A flow in which quantity of liquid flowing per second is not constant, is called unsteady flow. Unsteady flow is a transient phenomenon. It may be in time become steady or zero flow. For. example when a valve is closed at the discharge end of the pipeline.

What is the Backwater Effect?

A backwater is a part of a river in which there is little or no current. It can refer to a branch of a main river, which lies alongside it and then rejoins it, or to a body of water in a main river, backed up by the tide or by an obstruction such as a dam. The backwater effect transmits the secondary currents backwards, resulting in the creation of a sinuous pattern upstream from the shrinkage.
The Backwater phenomenon leads to an increase in the water surface level of upstream regions, thereby imposing the threat of submergence during flood events and affecting the longitudinal extent of the river reach.

How to Calculate Measured Unsteady Flow?

Measured Unsteady Flow calculator uses Measured Unsteady Flow = Normal Discharge*sqrt(1+(1/(Velocity of Flood Wave*Channel Slope))*Rate of Change of Stage) to calculate the Measured Unsteady Flow, The Measured Unsteady Flow formula is defined as that at the same stage, more discharge passes through the river during rising stages than in falling ones. Measured Unsteady Flow is denoted by Q_M symbol.

How to calculate Measured Unsteady Flow using this online calculator? To use this online calculator for Measured Unsteady Flow, enter Normal Discharge (Q_n), Velocity of Flood Wave (v_W), Channel Slope (S_o) & Rate of Change of Stage (dh_/dt) and hit the calculate button. Here is how the Measured Unsteady Flow calculation can be explained with given input values -> 14.4 = 12*sqrt(1+(1/(50*0.1))*2.2).

FAQ

What is Measured Unsteady Flow?

The Measured Unsteady Flow formula is defined as that at the same stage, more discharge passes through the river during rising stages than in falling ones and is represented as Q_M = Q_n*sqrt(1+(1/(v_W*S_o))*dh_/dt) or Measured Unsteady Flow = Normal Discharge*sqrt(1+(1/(Velocity of Flood Wave*Channel Slope))*Rate of Change of Stage). The normal discharge at a given stage under steady uniform flow, Velocity of Flood Wave in the channel, Channel Slope is how far a channel drops over a horizontal distance & Rate of Change of Stage in the channel.

How to calculate Measured Unsteady Flow?

The Measured Unsteady Flow formula is defined as that at the same stage, more discharge passes through the river during rising stages than in falling ones is calculated using Measured Unsteady Flow = Normal Discharge*sqrt(1+(1/(Velocity of Flood Wave*Channel Slope))*Rate of Change of Stage). To calculate Measured Unsteady Flow, you need Normal Discharge (Q_n), Velocity of Flood Wave (v_W), Channel Slope (S_o) & Rate of Change of Stage (dh_/dt). With our tool, you need to enter the respective value for Normal Discharge, Velocity of Flood Wave, Channel Slope & Rate of Change of Stage and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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