3- A trapezoidal channel with a bottom width of Bo= 6 m and sidewall slope of 1V:15H (m= 1.5) undergoes a gradual transition with a bed level raise of Az = 0.25 m. The water level and discharge upstream of transition were y1= 3.25 m and Q = 12.5 m3/s. Assuming an energy loss of AE = 10% of total head in the upstream section, calculate: a) water level in the downstream of transition; b) Froude numbers in sections 1 and 2. T B02 Bol 41 m Y₁ 1 Az Figure 2-14: Schematic of channel transition in a trapezoidal channel. Y₂ 2 Î

3- A trapezoidal channel with a bottom width of Bo= 6 m and sidewall slope of 1V:15H (m= 1.5) undergoes a gradual transition with a bed level raise of Az = 0.25 m. The water level and discharge upstream of transition were y1= 3.25 m and Q = 12.5 m3/s. Assuming an energy loss of AE = 10% of total head in the upstream section, calculate: a) water level in the downstream of transition; b) Froude numbers in sections 1 and 2. T B02 Bol 41 m Y₁ 1 Az Figure 2-14: Schematic of channel transition in a trapezoidal channel. Y₂ 2 Î

Structural Analysis

6th Edition

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

3- A trapezoidal channel with a bottom width of Bo= 6 m and sidewall slope of 1V:15H (m= 1.5)
undergoes a gradual transition with a bed level raise of Az = 0.25 m. The water level and discharge
upstream of transition were y1= 3.25 m and Q = 12.5 m3/s. Assuming an energy loss of AE = 10% of total
head in the upstream section, calculate:
a) water level in the downstream of transition;
b) Froude numbers in sections 1 and 2.
y
T
B02
Bol
41 У1
m
1
Az
Figure 2-14: Schematic of channel transition in a trapezoidal channel.
2
1/₂ =
y

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Step 2: Calculate specific energy at section 1

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