Fluctuating Frequency of Live Bed Scour Depth around Submerged Weirs at Equilibrium Stages
Publication: Journal of Hydraulic Engineering
Volume 148, Issue 4
Abstract
Previous studies have primarily focused on the estimation of equilibrium scour depths around weirs, while overlooking the details of the temporal evolution of the live bed scour process of submerged weirs at the equilibrium stage. This study aims to investigate the relationships between fluctuating frequencies of the approaching bedforms and live bed scour depths around submerged weirs. The average fluctuating frequencies of approaching bedforms, upstream scour depth, and downstream scour depth are quantified from measured topographic time-series data. The frequency of upstream scour depth variations is found to be almost the same as that of bedforms, while the fluctuating frequencies of the scour depth variations downstream of the weir are found to be 0.38–0.68 times the approaching bedform frequencies in the scour equilibrium stage. New empirical equations are proposed to predict the fluctuating frequencies of live bed scour depth variations in the scour equilibrium stage.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was supported by the National Key R&D Program of China (2019YFC1510701) and the Natural Science Foundation of China (52122109 and 51909177).
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Published In
Journal of Hydraulic Engineering
Volume 148 • Issue 4 • April 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: May 7, 2021
Accepted: Dec 7, 2021
Published online: Jan 25, 2022
Published in print: Apr 1, 2022
Discussion open until: Jun 25, 2022
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