1
GATE CE 2023 Set 2
Numerical
+2
-0

The cross-section of a small river is sub-divided into seven segments of width 1.5 m each. The average depth, and velocity at different depths were measured during a field campaign at the middle of each segment width. The discharge computed by the velocity area method for the given data is _____ m3/s (round off to one decimal place).

Segment Average depth (D) (m) Velocity (m/s) at 0.2D Velocity (m/s) at 0.6D Velocity (m/s) at 0.8D
1 0.40 -- 0.40 --
2 0.70 0.76 -- 0.70
3 1.20 1.19 -- 1.13
4 1.40 1.25 -- 1.10
5 1.10 1.13 -- 1.09
6 0.80 0.69 -- 0.65
7 0.45 -- 0.42 --
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2
GATE CE 2023 Set 1
MCQ (Single Correct Answer)
+2
-0.66

A very wide rectangular channel carries a discharge (Q) of 70 m3/s per meter width. Its bed slope changes from 0.0001 to 0.0009 at a point P, as shown in the figure (not to scale). The Manning’s roughness coefficient of the channel is 0.01. What water surface profile(s) exist(s) near the point P?

GATE CE 2023 Set 1 Fluid Mechanics and Hydraulic Machines - Open Channel Flow Question 5 English
A
M2 and S2 
B
M2 only
C
S2 only
D
S2 and hydraulic jump
3
GATE CE 2023 Set 1
Numerical
+2
-0
A hydraulic jump occurs in a 1.0 m wide horizontal, frictionless, rectangular channel, with a pre-jump depth of 0.2 m and a post-jump depth of 1.0 m. The value of g may be taken as 10 m/s2. The values of the specific force at the pre-jump and post-jump sections are same and are equal to (in m3, rounded off to two decimal places) _____________ .
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