i) An open channel of trapezoidal cross section, 2.5m at the base and sides inclined at 60° to the horizontal has a bed slope of 1 in 500. It is found that when the flow is 1.5 m³/s, the depth of the water in the channel is 0.5 m. Determine the roughness coefficient of this channel. ii) Calculate the flow rate when the depth of flow in the channel above increased to 0.7 m. iii) Evaluate Reynolds Number and hence comment on the type of flow in the channel iv) Calculate the Specific Energy along the centre of the channel.

i) An open channel of trapezoidal cross section, 2.5m at the base and sides inclined at 60° to the horizontal has a bed slope of 1 in 500. It is found that when the flow is 1.5 m³/s, the depth of the water in the channel is 0.5 m. Determine the roughness coefficient of this channel. ii) Calculate the flow rate when the depth of flow in the channel above increased to 0.7 m. iii) Evaluate Reynolds Number and hence comment on the type of flow in the channel iv) Calculate the Specific Energy along the centre of the channel.

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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Concept explainers

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

1)
i) An open channel of trapezoidal cross section, 2.5m at the base and sides inclined at 60°
to the horizontal has a bed slope of 1 in 500. It is found that when the flow is 1.5 m/s,
the depth of the water in the channel is 0.5 m. Determine the roughness coefficient of this
channel.
ii) Calculate the flow rate when the depth of flow in the channel above increased to 0.7 m.
ii) Evaluate Reynolds Number and hence comment on the type of flow in the channel
iv) Calculate the Specific Energy along the centre of the channel.

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