Approximate Analytical Solution and Laboratory Experiments for Dam-Break Wave Tip Region in Triangular Channels
Publication: Journal of Hydraulic Engineering
Volume 147, Issue 10
Abstract
Solutions for dam-break flow mainly developed for rectangular channels are not applicable to prediction of the propagation of the dam-break wave in frictional triangular channels. This study presents an approximate solution considering the frictional effect on the dam-break flow in a dry horizontal triangular channel. Wave tip velocity is solved by an implicit formula for the product of time and resistance coefficients. All other hydraulic properties in the wave tip region can be expressed as explicit functions of wave tip velocity. Meanwhile, laboratory experiments have been performed for obtaining water surface profiles of dam-break flow from which the position and velocity of the wave tip front have been derived. Results show that retardation of the wave front position is more significant with the increases in both resistance and time. The proposed analytical solution shows satisfactory agreement with measurements, and clarifies how the behavior of the dam-break wave tip is affected by channel geometry.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request (including analytical and experimental test data in Excel).
Acknowledgments
This study is supported by the National Natural Science Foundation of China (Grant Nos: 51879179, 52079081). Comments made by the associate editor and reviewers have greatly improved the quality of the paper.
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Published In
Journal of Hydraulic Engineering
Volume 147 • Issue 10 • October 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Nov 23, 2020
Accepted: May 12, 2021
Published online: Aug 9, 2021
Published in print: Oct 1, 2021
Discussion open until: Jan 9, 2022
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