Wave Overtopping Prediction of a Gentle Sloped Stepped Revetment

Schoonees, Talia; Kerpen, Nils B.; Liebisch, Sven; Schlurmann, Torsten

doi:10.9753/icce.v36.papers.99

Cited by 3 publications

(9 citation statements)

References 2 publications

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“…Schoonees et al (2018) [12] provided overtopping data for stepped revetments over gentle slopes (cotα = 6). The tests were conducted in the same wave flume as the tests of the present study.…”

Section: Surface Roughness Of Stepped Revetmentsmentioning

confidence: 99%

“…Only studies with irregular wave conditions are included in the table. Reliable data for further analysis in this paper is extracted from appropriate literature [6,8,9,12]. Table 1.…”

Section: Surface Roughness Of Stepped Revetmentsmentioning

confidence: 99%

“…Currently, only a single study [9] considered this adaptation, and thus the other data [6,8] were recalculated according to Equation (A10). Solely breaking wave conditions were provided by Schoonees et al (2018) [12] and thus no adaptation is required.…”

Section: Authormentioning

confidence: 99%

“…, including the boundary conditions of the presented literature [6,8,9,12]. An overview of the boundary conditions is given together with the results for each test in Table 3.…”

Section: Test Conditionsmentioning

confidence: 99%

“…The results of these studies are partly inconclusive, mainly due to the variable hydraulic-and geometric boundary conditions from which conclusions on reduction were determined. The present paper is mainly based on findings from [8] incorporating findings from more recent studies [9,12].…”

Section: Introductionmentioning

confidence: 99%

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Wave Overtopping of Stepped Revetments

Kerpen

Schoonees

Schlurmann

2019

Water

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Wave overtopping—i.e., excess of water over the crest of a coastal protection infrastructure due to wave run-up—of a smooth slope can be reduced by introducing slope roughness. A stepped revetment ideally constitutes a slope with uniform roughness and can reduce overtopping volumes of breaking waves up to 60% compared to a smooth slope. The effectiveness of the overtopping reduction decreases with increasing Iribarren number. However, to date a unique approach applicable for a wide range of boundary conditions is still missing. The present paper: (i) critically reviews and analyzes previous findings; (ii) contributes new results from extensive model tests addressing present knowledge gaps; and (iii) proposes a novel empirical formulation for robust prediction of wave overtopping of stepped revetments for breaking and non-breaking waves. The developed approach contrasts a critical assessment based on parameter ranges disclosed beforehand between a smooth slope on the one hand and a plain vertical wall on the other. The derived roughness reduction coefficient is developed and adjusted for a direct incorporation into the present design guidelines. Underlying uncertainties due to scatter of the results are addressed and quantified. Scale effects are highlighted.

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Section: Surface Roughness Of Stepped Revetmentsmentioning

confidence: 99%

“…Only studies with irregular wave conditions are included in the table. Reliable data for further analysis in this paper is extracted from appropriate literature [6,8,9,12]. Table 1.…”

Section: Surface Roughness Of Stepped Revetmentsmentioning

confidence: 99%

Section: Authormentioning

confidence: 99%

“…, including the boundary conditions of the presented literature [6,8,9,12]. An overview of the boundary conditions is given together with the results for each test in Table 3.…”

Section: Test Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wave Overtopping of Stepped Revetments

Kerpen

Schoonees

Schlurmann

2019

Water

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Optimization of stepped revetment configuration on minimizing wave run-up and overtopping

Rif'atin,

Magdalena,

Dewata

et al. 2024

Physics of Fluids

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A stepped revetment has proven to be able to attenuate wave run-up height and wave overtopping discharge more effectively than a dike or a smooth-slope revetment does. However, the investigation into the optimal design of a stepped revetment, tailored to different wave and coastal conditions, is notably lacking. This paper introduces a computational model developed from the non-linear shallow water equations and the Genetic Algorithm. The aim is to optimize the width of a stepped revetment's step and crest, considering wave run-up and overtopping as key parameters. Multiple benchmark tests were conducted to validate the model's accuracy in estimating wave run-up and overtopping for specific setups. The results demonstrate a strong correlation between the numerical findings and experimental data. The Genetic Algorithm was then employed to predict the optimal step width for minimizing wave run-up height and determining the optimal step and crest widths to reduce wave overtopping discharge to an acceptable level. The findings reveal that for a gently sloping stepped revetment, the optimal step widths, based on wave run-up, remain relatively consistent across different wave heights. In contrast, when optimizing for wave overtopping, the optimal step width tends to fluctuate in most cases, although it shows some consistency in certain scenarios.

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Impact of Stepped Structures on Tsunami Wave Propagation and Overtopping Engineering

Chergui,

Bouzit

2023

IJSSE

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The urgent necessity to fortify coastal regions and safeguard both the natural environment and key coastal infrastructure underscores the significance of structural measures in coastal engineering. Among these, the seawall reigns as the primary fortification method. This study aims to elucidate the impact of a stepped structure on the propagation and overtopping of solitary waves when they encounter an impermeable seawall. The investigation has been conducted using ANSYS Fluent, a widely recognized commercial software. Although previous researchers have extensively used the two-dimensional volume of fluid (VOF) model, based on the Reynolds-Averaged Navier-Stokes (RANS) equations and the k-ε turbulence closure solver, this study fills the gap in the understanding of the stepped structure's effect. It shows a commendable agreement with experimental results, proving its reliability. Simulations were executed with varied configurations of stepped structures (Step width Sw=0.6 m, 1.2 m, 1.8 m, and Step height Sh=0.3 m, 0.6 m, 0.9 m), emulating tsunami waves of constant wave height and water depth over a stepped structure on a 1:20 sloped beach. Initially, the accuracy of the results was substantiated by comparing them with experimental and numerical data of the free surface and the distribution of the pressure field on the seawall. Numerical simulations, incorporating varying wave heights, water depths, and step heights, were performed to scrutinize the evolution of waves and the pressure exerted by waves impacting the seawall.

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Wave Overtopping Prediction of a Gentle Sloped Stepped Revetment

Cited by 3 publications

References 2 publications

Wave Overtopping of Stepped Revetments

Wave Overtopping of Stepped Revetments

Optimization of stepped revetment configuration on minimizing wave run-up and overtopping

Impact of Stepped Structures on Tsunami Wave Propagation and Overtopping Engineering

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