An Experimental Study of Mobile Boundary Transitions in Alluvial Canals
Publication: Journal of Irrigation and Drainage Engineering
Volume 148, Issue 1
Abstract
Self-formed shape and energy loss taking place at the transition of alluvial canals were studied. Two trapezoidal erodible canals were modeled along with a sudden contraction in a laboratory flume. Experiments were performed under steady flow conditions for almost-uniform coarse sand with average grain sizes of 1.2, 0.91, and 0.77 mm and flow rates ranging from 0.0001 to . The results show that the ultimate self-formed warped transition can be represented by an exponential relation that depends on average grain size and flow rate. For a constant flow rate, the length of transition decreases as the grain size increases, whereas for a constant grain size it increases with increasing flow rate, and the minimum energy loss is obtained at the threshold condition.
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Data Availability Statement
All data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors thank Dr. Mohammad Najafzadeh, Dr. Farhad Hooshyaripor, and the anonymous reviewers for their valuable comments which improved the quality of the paper.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 148 • Issue 1 • January 2022
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Dec 12, 2020
Accepted: Aug 13, 2021
Published online: Nov 1, 2021
Published in print: Jan 1, 2022
Discussion open until: Apr 1, 2022
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