c) Uniform flow in a steep rectangular channel occurs with a depth of 0.421m for a dischargeof 4 m'/s. Flow along this channel is interrupted by the presence of a hump in the channelbed.i. Show that critical flow occurs over the hump.ii. If the flow in the channel above is suddenly reduced to 3 m/s, and the normal depthfor this discharge is 0.348m show that this depth of flow cannot be maintained.iii. Determine the new depth required to cross the hump and the speed of propagation ofthe resulting surge wave.(Channel data: b 3 m, n = 0.015, S. = 0.01, Az = 0.083 m).%3|9 = constantaI siÉslor (a) y, > y.. Ay A:(b) y, > y.. ay> A:(c) y, < ye. Ay > Az(d) y, < y. Ay 0

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c) Uniform flow in a steep rectangular channel occurs with a depth of 0.421m for a discharge of 4 m/s. Flow along this channel is interrupted by the presence of a hump in the channel bed. i. Show that critical flow occurs over the hump. ii. If the flow in the channel above is suddenly reduced to 3 m³/s, and the normal depth for this discharge is 0.348m show that this depth of flow cannot be maintained. iii. Determine the new depth required to cross the hump and the speed of propagation of the resulting surge wave. (Channel data: b = 3 m, n = 0.015, So = 0.01, Az = 0.083 m).

c) Uniform flow in a steep rectangular channel occurs with a depth of 0.421m for a discharge of 4 m/s. Flow along this channel is interrupted by the presence of a hump in the channel bed. i. Show that critical flow occurs over the hump. ii. If the flow in the channel above is suddenly reduced to 3 m³/s, and the normal depth for this discharge is 0.348m show that this depth of flow cannot be maintained. iii. Determine the new depth required to cross the hump and the speed of propagation of the resulting surge wave. (Channel data: b = 3 m, n = 0.015, So = 0.01, Az = 0.083 m).

Structural Analysis

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Highway Drainage

Highway drainage is the process of extracting and regulating the excess surface water on the pavement by giving the desired slope. The construction of a highway drain helps to divert the water present on the surface, and sub-grade by the means of slope. Highway drainage systems are a necessary part of smooth functioning of traffic, since the highway drainage systems provide proper disposal of unwanted substances from the highways.

Question

c) Uniform flow in a steep rectangular channel occurs with a depth of 0.421m for a discharge
of 4 m'/s. Flow along this channel is interrupted by the presence of a hump in the channel
bed.
i. Show that critical flow occurs over the hump.
ii. If the flow in the channel above is suddenly reduced to 3 m/s, and the normal depth
for this discharge is 0.348m show that this depth of flow cannot be maintained.
iii. Determine the new depth required to cross the hump and the speed of propagation of
the resulting surge wave.
(Channel data: b 3 m, n = 0.015, S. = 0.01, Az = 0.083 m).
%3|
9 = constant
a
I si
És
lor (a) y, > y.. Ay A:
(b) y, > y.. ay> A:
(c) y, < ye. Ay > Az
(d) y, < y. Ay 0

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