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Approximate Analytical Solution and Laboratory Experiments for Dam-Break Wave Tip Region in Triangular Channels
Wang, B. Zhang, F. Liu, X. Guo, Yakun Zhang, J. Peng, Y.
Wang, B.
Zhang, F.
Liu, X.
Guo, Yakun
Zhang, J.
Peng, Y.
Publication Date
2021-10
End of Embargo
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(c) 2021 ASCE. This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://doi.org/10.1061/(ASCE)HY.1943-7900.0001928.
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openAccess
Accepted for publication
2021-05-12
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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.
Version
Accepted manuscript
Citation
Wang B, Zhang F, Liu X et al (2021) Approximate Analytical Solution and Laboratory Experiments for Dam-Break Wave Tip Region in Triangular Channels. Journal of Hydraulic Engineering. 147(10)
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Article