Run-up and inundation generated by non-decaying dam-break bores on a planar beach

Barranco, Ignacio; Liu, Philip L.‐F.

doi:10.1017/jfm.2021.98

Cited by 12 publications

(35 citation statements)

References 40 publications

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“…6 underestimates the run-up due to simplifications made by the shallow water equation, which is not capable of representing the flow features as observed in Section 2.2. Even though more refined approximations exist, they are not applicable to the present dataset due to using different boundary conditions (like an initially wet flume and limited reservoir length in Barranco and Liu (2021)) or waves (breaking dam-break waves used by Lu et al (2018)) or bores (resulting from solitary waves used by Jensen et al (2003)). The delimitation criterion found here should be verified in future work as well.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, Lu et al (2018) analyzed the spatiotemporal development of the run-up process in detail. Barranco and Liu (2021) generated dam-break waves in a flume with water on both sides of the dam-break gate and used a variable reservoir length to investigate the features of the waves' run-up. They found a dependency between the run-up height and the initial impoundment depth and flood duration.…”

Section: Introductionmentioning

confidence: 99%

“…They found a dependency between the run-up height and the initial impoundment depth and flood duration. By facilitating a numerical model, they proposed equations to predict the inundation depth, run-up height, and duration of the flood in relation to the bore characteristics (Barranco and Liu, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Dam-Break Waves’ Hydrodynamics on Composite Bathymetry

Häfen

Krautwald

Bihs

et al. 2022

Front. Built Environ.

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Among others, dam-break waves are a common representation for tsunami waves near- or on-shore as well as for large storm waves riding on top of storm surge water levels at coasts. These extreme hydrodynamic events are a frequent cause of destruction and losses along coastlines worldwide. Within this study, dam-break waves are propagated over a composite bathymetry, consisting of a linear slope and an adjacent horizontal plane. The wave propagation on the slope as well as its subsequent inundation of the horizontal hinterland is investigated, by varying an extensive set of parameters, for the first time. To that end, a numerical multi-phase computational fluid dynamics model is calibrated against large-scale physical flume tests. The model is used to systematically alter the parameters governing the hydrodynamics and to link them with the physical processes observed. The parameters governing the flow are the slope length, the height of the horizontal plane with respect to the ocean bottom elevation, and the initial impoundment depth of the dam-break. It is found that the overland flow features are governed by the non-dimensional height of the horizontal plane. Empirical equations are presented to predict the features of the overland flow, such as flow depth and velocities along the horizontal plane, as a function of the aforementioned parameters. In addition, analytical considerations concerning these dam-break flow features are presented, highlighting the changing hydrodynamics over space and time and rising attention to this phenomenon to be considered in future experimental tests.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dam-Break Waves’ Hydrodynamics on Composite Bathymetry

Häfen

Krautwald

Bihs

et al. 2022

Front. Built Environ.

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“…The history of bore research, both theoretical and experimental, is long. A review on the subject has been provided by Barranco (2021) and will not be repeated here. Only the literature most relevant to the present study are highlighted herein.…”

Section: Introductionmentioning

confidence: 99%

“…In most of existing experiments, only the free surface profiles in constant water depth (Stansby, Chegini & Barnes 1998) and the shoreline motions associated with bores (Yeh, Ghazali & Marton 1989) are measured. Barranco & Liu (2021) studied the inundation produced by bores of different strengths and lengths, which were generated by using various reservoir lengths, and highlighted the importance of the bore length on inundation. They provided analytical relations to calculate the length of bores reaching the beach toe.…”

Section: Introductionmentioning

confidence: 99%

Inundation, runup and flow velocity of wavemaker generated bores on a planar beach

Barranco

Liu

2023

J. Fluid Mech.

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Undulating and breaking bores are generated in the laboratory using a programmable long-stroke wavemaker. By changing the stroke length and the speed of the wavemaker, both non-decaying and decaying bores are generated and studied. Bore strength, height and duration are measured and compared with the solutions derived by using the method of characteristics, with excellent agreement. The measurements for inundation depth, runup height and flood duration are checked with the formulas presented in Barranco & Liu (J. Fluid Mech., vol. 915, 2021). The comparisons show that the formulas are also accurate for the non-decaying bores generated by the wavemaker. The maximum inundation depth predicted by the formula for zero bore length at the beach toe agrees with the laboratory observations for decaying bores. Using a high-speed particle image velocimetry system, the ensemble-averaged velocities and fluctuating velocities under undulating bores and breaking bores are measured in constant water depth and in the vicinity of the still water shoreline. Detailed analyses of the velocity fields are presented and discussed. For the undulating bore a long quiescent flood duration is observed, while for the breaking bore the up-rush flow changes into down-rush flow almost linearly.

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