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Determine the dimension of the channel using tractive force method by using a ratio of Boly = 8 and the sketch of channel cross section.

Determine the dimension of the channel using tractive force method by using a ratio of Boly = 8 and the sketch of channel cross section.

Fundamentals of Geotechnical Engineering (MindTap Course List)
Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter8: Stresses In A Soil Mass
Section: Chapter Questions
Problem 8.2P
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Question
5- A moderately curved channel with a slightly rounded non-cohesive bed material with a particle size of d = 15 mm carrying a discharge of 30 m³/s. The longitudinal slope of the channel is 0.002 and the side wall slopes are equal to 60% of the angle of repose. (a) Determine the dimension of the channel using tractive force method by using a ratio of Boly = 8 and the sketch of channel cross section. (b) Does the channel erode? (c) Provide your engineering comments to prevent the possible erosion (if any) and improve the channel design. Note: Use the Strickler's formula to calculate Manning's value. Use the Swammy and Mittal's formula to estimate the critical shear stress.
Transcribed Image Text:5- A moderately curved channel with a slightly rounded non-cohesive bed material with a particle size of d = 15 mm carrying a discharge of 30 m³/s. The longitudinal slope of the channel is 0.002 and the side wall slopes are equal to 60% of the angle of repose. (a) Determine the dimension of the channel using tractive force method by using a ratio of Boly = 8 and the sketch of channel cross section. (b) Does the channel erode? (c) Provide your engineering comments to prevent the possible erosion (if any) and improve the channel design. Note: Use the Strickler's formula to calculate Manning's value. Use the Swammy and Mittal's formula to estimate the critical shear stress.
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