Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 16, Problem 14P
To determine
(a)
The flow velocity of the channel.
To determine
(b)
The flow depth of channel.
To determine
(c)
The type of flow.
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Water is flowing in a weedy excavated earth channel
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A diversion gate backs up flow in a 5-ft wide rectangular irrigation channel (S0 = 0.001, n = 0.015). The discharge in the channel is 50 cfs. If the depth of flow at the gate is 3.5 ft, determine the channel and flow classification (e.g., M-2, S-1, etc.) upstream of the gate and explain your supporting logic. Then determine the water surface profile by finding the depth of flow at distances of 100ft, 300ft, and 600ft upstream of the gate.
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Q1( b) A float-finish concrete channel with bottom width of 3 m carries 3.5 m³/s of flow on bottom slope of 0.0003. Propose a cross section for the channel. Using the proposed shape section for this channel, compute :
(i) Critical depth of flow
(ii) Critical bottom slope of channel
(iii) State of flow based on Froude number when depth of flow is 2.5 m
(iv)Alternate depth of flow for the same specific energy in Ql(b)(iii) and the corresponding Froude number
(v) If a trapezoid section is used, analyse proportions for the most efficient trapezoid section given that the side slope is not fixed.
Chapter 16 Solutions
Traffic and Highway Engineering
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