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A 10 m wide rectangular channel has a bed slope of 3.33 × 10-3 and the Manning's coefficient 0.015. Water in the channel is flowing at a uniform depth of 3 m. At a particular section gradually varied flow (GVF) is observed and the flow depth is measured as 3.1 m. The GVF profile at that section is classified as
  • a)
    M1
  • b)
    S1
  • c)
    M2
  • d)
    S2
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A 10 m wide rectangular channel has a bed slope of 3.33 × 10-3an...
Width of the channel, B = 10 m
Slope of the channel, S = 3.33 × 10-3
Manning’s coefficient, n = 0.15
Normal depth, yn = 3 m
The discharge of the channel, Q
Where,
R = Hydraulic mean radius = A/P
A = Wetted area of the cross section
S = Bed slope
P = Wetted perimeter of the cross section
∴ A = B × y = 10 × 3 = 30 m2
P = B + 2y = 10 + 2 × 3 = 16 m
Q = 175.58 m3/s
Specific discharge or discharge per unit width, 
∴ Critical depth,     for the rectangular channel 
yc = 3.16 m
Hence, yc > yn
and yn < y < yc leads to the gradually varied profile of S2.
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Most Upvoted Answer
A 10 m wide rectangular channel has a bed slope of 3.33 × 10-3an...
To find the slope of a channel, we use the formula:

Slope = Rise / Run

In this case, the rise is the change in elevation and the run is the length of the channel.

Since the channel is rectangular, the bed slope is the same as the channel slope.

The given bed slope is 3.33.

Therefore, the slope of the channel is 3.33.
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A 10 m wide rectangular channel has a bed slope of 3.33 × 10-3and the Manning's coefficient 0.015. Water in the channel is flowing at a uniform depth of 3 m. At a particular section gradually varied flow (GVF) is observed and the flow depth is measured as 3.1 m. The GVF profile at that section is classified asa)M1b)S1c)M2d)S2Correct answer is option 'D'. Can you explain this answer?
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A 10 m wide rectangular channel has a bed slope of 3.33 × 10-3and the Manning's coefficient 0.015. Water in the channel is flowing at a uniform depth of 3 m. At a particular section gradually varied flow (GVF) is observed and the flow depth is measured as 3.1 m. The GVF profile at that section is classified asa)M1b)S1c)M2d)S2Correct answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A 10 m wide rectangular channel has a bed slope of 3.33 × 10-3and the Manning's coefficient 0.015. Water in the channel is flowing at a uniform depth of 3 m. At a particular section gradually varied flow (GVF) is observed and the flow depth is measured as 3.1 m. The GVF profile at that section is classified asa)M1b)S1c)M2d)S2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 10 m wide rectangular channel has a bed slope of 3.33 × 10-3and the Manning's coefficient 0.015. Water in the channel is flowing at a uniform depth of 3 m. At a particular section gradually varied flow (GVF) is observed and the flow depth is measured as 3.1 m. The GVF profile at that section is classified asa)M1b)S1c)M2d)S2Correct answer is option 'D'. Can you explain this answer?.
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