Effect of bed roughness on tsunami bore propagation and overtopping

Esteban, Miguel; Roubos, Jochem Jan; Iimura, Kotaro; Salet, Jorrit Thomas; Hofland, Bas; Bricker, Jeremy D.; Ishii, Hidenori; Hamano, Go; Takabatake, Tomoyuki; Shibayama, Tomoya

doi:10.1016/j.coastaleng.2019.103539

Cited by 16 publications

(9 citation statements)

References 48 publications

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“…With the increase in the h s , the overtopped inundation depth decreased, whereas the Froude number (Fr) of the overtopped flow increased. The same has been observed in Esteban et al's [39,40] experiments. Due to the increase in the Froude number of the overtopped bore, the non-dimensionalized pressure (obtained by dividing the pressure and overtopped bore depth) showed higher values at the structure's bottom level, similar to the pressure profile suggested by Asakura et al [41] for waves with fission.…”

Section: Introductionsupporting

confidence: 86%

Section: Flow Overtopping and Force Characteristicsmentioning

confidence: 99%

“…For example, Crespo et al [29] and Thomas and Cox [31] observed the jet type projection of the splashed surge with low-height seawalls. Depending on the height of the LRC (or VW), a part of the incoming surge is reflected offshore, and the rest overtops [40,44] (Figures 10e and 11e). Figure 12a,b present the force and the overturning moment acting on the inland structure behind the LRC and the VW for Wall 4 and do = 0.9 m. The corresponding pressure distributions are marked in Figure 12c.…”

Section: Flow Overtopping and Force Characteristicsmentioning

confidence: 99%

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Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Harish

Sriram

Schüttrumpf

et al. 2022

Water

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It is more common to introduce the parapet/recurve/wave return wall over the existing structure, such as a vertical seawall or composite structure, to reduce the overtopping efficiently. The advantage of a recurve wall on top of the sea wall has been studied in the past in regards to wave interaction and overtopping. However, their efficiency in protecting the inland structure during extreme events such as flooding during a tsunami is unexplored. The present study addresses the effect of a vertical seawall with recurve in reducing the dam break surge simulating tsunami-induced forces on an inland structure. The study compares the momentum transferred on the landward structure behind a Vertical seaWall (VW) and a vertical wall with the Large ReCurve on the top (LRC) during overtopped conditions. The outcome from the numerical simulation shows an insignificant contribution due to the LRC in reducing the force on the inland structure compared to the VW, albeit delaying the impact time. However, the LRC performed slightly better in the case of a low-rise wall located near the inland structure than the VW. Furthermore, a low-rise VW increases the force and overturning moment on the inland structure compared to no-wall conditions. Both the LRC and the VW reduced the horizontal force on the structure linearly with the increase in height. An exponential decrease in the overturning moment was observed on the landward structure with the increase in the height of the VW or the LRC. Design equations are proposed for the forces and overturning moment reduction based on the height of the VW or the LRC.

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Section: Introductionsupporting

confidence: 86%

Section: Flow Overtopping and Force Characteristicsmentioning

confidence: 99%

Section: Flow Overtopping and Force Characteristicsmentioning

confidence: 99%

See 1 more Smart Citation

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Harish

Sriram

Schüttrumpf

et al. 2022

Water

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“…Such effects should be also clarified for partially submerged landslide‐tsunamis. A deeper focus on the effects of the surface friction of the sliding slope (acrylic boards were used to create a slope in the present experiments) would also be important, as the surface of a slope has also been reported to influence the generation and propagation process of tsunamis generated in experiments (Esteban et al., 2020; Mcfall et al., 2018; Stolle et al., 2019). Given the fact that the waves generated in the present study were relatively small, larger scale experiments can further validate the reliability of the developed equation.…”

Section: Discussionmentioning

confidence: 99%

Three‐Dimensional Physical Modeling of Tsunamis Generated by Partially Submerged Landslides

et al. 2022

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“…There is a great variety of studies (Shankar and Jayaratne, 2003;Andre et al, 2004;Molines et al, 2012;Van Gent and Luis, 2013;Deilami-Tarifi et al, 2015;Jiménez Moreno, 2017;Kerpen et al, 2019;Esteban et al, 2020;Vieira et al, 2021) that give values or estimation methods for the roughness influence factor (γ f ) for many different types of dike revetment elements.…”

Section: Effect Of Roughnessmentioning

confidence: 99%

The influence of berms, roughness and oblique waves on wave overtopping at dikes

Chen¹

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may be reproduced, stored in a retrieval system or transmitted in any form or by any means without pernissin of the author. Alle rechten voorbehouden. Niets uit deze uitgave mag worden vermenigvuldigd, in enige vorm of op enige wijze, zonder voorafgaande schriftelijke toestemming van de auteur. Graduation Committee Chairman/secretary prof.dr.ir. H. F. J. M. Koopman Supervisors prof. dr. S. J. M. H. Hulscher Co-supervisor dr. J. J. Warmink prof. dr. ir. M. R. A. van Gent Additional committee members prof. dr. R. W. M. R. J. B. Ranasinghe prof.dr. D. van der Wal prof. dr. ir. P. Troch prof. dr. ir. W. S. J. Uijttewaal dr. ir. A. Antonini I will mount a long wind some day and break the heavy waves, And set my cloudy sail straight and bridge the deep, deep sea.

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Effect of bed roughness on tsunami bore propagation and overtopping

Cited by 16 publications

References 48 publications

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Three‐Dimensional Physical Modeling of Tsunamis Generated by Partially Submerged Landslides

The influence of berms, roughness and oblique waves on wave overtopping at dikes

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