5. A uniform flow of 110,000 ft³/s is measured in a natural channel that is approximately rectangular in shape with a 2650-ft width and 17.5 ft depth. The water-surface elevation drops 0.37 ft per mile. Based on the computed Manning coefficient, n, characterize the type of natural channel observed. Also compute the Froude number and determine whether the flow is subcritical or supercritical.
5. A uniform flow of 110,000 ft³/s is measured in a natural channel that is approximately rectangular in shape with a 2650-ft width and 17.5 ft depth. The water-surface elevation drops 0.37 ft per mile. Based on the computed Manning coefficient, n, characterize the type of natural channel observed. Also compute the Froude number and determine whether the flow is subcritical or supercritical.
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter7: Permeability
Section: Chapter Questions
Problem 7.5P
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** Please do not put the n value as 0.024 it is incorrect. Also, please remember to identify the channel type.

Transcribed Image Text:5. A uniform flow of 110,000 ft³/s is measured in a natural channel that is approximately
rectangular in shape with a 2650-ft width and 17.5 ft depth. The water-surface elevation
drops 0.37 ft per mile. Based on the computed Manning coefficient, n, characterize the
type of natural channel observed. Also compute the Froude number and determine
whether the flow is subcritical or supercritical.
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