Random wave runup and overtopping a steep sea wall: Shallow-water and Boussinesq modelling with generalised breaking and wall impact algorithms validated against laboratory and field measurements

McCabe, Maurice; Stansby, Peter; Apsley, David

doi:10.1016/j.coastaleng.2012.11.010

Cited by 56 publications

(38 citation statements)

References 18 publications

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“…Dune restoration may be considered the first candidate in order to defend the inland from marine inundation [16]. Seawalls, that induce a local erosion due to reflection, are cost-effective solutions to limit the overtopping, especially when the parapet is appropriately shaped [58,59]. LCS and other detached parallel structure, by reducing the wave energy incident directly to the coast, may have a significant impact in the reduction of run-up.…”

Section: Urbanized Low Sandy Coastsmentioning

confidence: 99%

Vulnerability Analysis of the Venetian Littoral and Adopted Mitigation Strategy

Ruol

Martinelli

Favaretto

2018

Water

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This paper discusses the key aspects of the recent Coastal Plan of the Veneto Region (IT). Its aim is to propose a single mitigation strategy for coastal erosion that is valid for the whole Veneto Region, and possibly elsewhere, as well as a method to assign a priority level to any action. The suggested mitigation action against erosion depends on urbanization level, beach width, as well as cross-shore and long-shore sediment transport. The criterion used to give a priority level to mitigation actions is based on a vulnerability index that takes into account erosive tendency, existing coastal flooding hazards, coast value, environmental relevance, tourist pressure, urbanization level, the presence of production activities, and cultural heritage. A sample case featuring the littoral of Rosolina is also provided and includes a site description, the sediment budget, critical issues and possible mitigation measures.

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Section: Urbanized Low Sandy Coastsmentioning

confidence: 99%

Vulnerability Analysis of the Venetian Littoral and Adopted Mitigation Strategy

Ruol

Martinelli

Favaretto

2018

Water

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“…More recent improvements in accounting for storm-driven changes in beach morphodynamics in academic studies have moved beyond assuming a fixed beach profile, for example with SWAB (Shallow Water and Boussinesq, developed by [33]) [34], to accounting for gravel barrier response using XBeach-G [17]. This study quantified uncertainty in terms of flood hazard and inundation extent from various H s -WL scenarios with the same annual joint probability for a gravel beach morphology and found that the greatest flood hazard is posed by a swell wave regime under high water levels [17].…”

Section: Flood Risk Modellingmentioning

confidence: 99%

Role of Beach Morphology in Wave Overtopping Hazard Assessment

Phillips

Brown

Bidlot

et al. 2017

JMSE

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Understanding the role of beach morphology in controlling wave overtopping volume will further minimise uncertainties in flood risk assessments at coastal locations defended by engineered structures worldwide. XBeach is used to model wave overtopping volume for a 1:200 year joint probability distribution of waves and water levels with measured, pre-and post-storm beach profiles. The simulation with measured bathymetry is repeated with and without morphological evolution enabled during the modelled storm event. This research assesses the role of morphology in controlling wave overtopping volumes for hazardous events that meet the typical design level of coastal defence structures. Results show that disabling storm-driven morphology under-represents modelled wave overtopping volumes by up to 39% under high H s conditions and has a greater impact on the wave overtopping rate than the variability applied within the boundary conditions due to the range of wave-water level combinations that meet the 1:200 year joint probability criterion. Accounting for morphology in flood modelling is therefore critical for accurately predicting wave overtopping volumes and the resulting flood hazard and to assess economic losses.

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“…There have also been major developments in coastal wave simulation methods, some based on the non-linear shallow water equations (e.g. Hu et al (2000), Hubbard and Dodd (2002)), Boussinesq-type equations (see for example Fuhrman and Madsen (2008) or review documents by Dingemans (1997), Kirby (1997), Madsen and Schäffer (1999), Kirby (2003), Brocchini (2013)), hybrid Boussinesq-shallow flow equations (Watson et al (1994), Borthwick et al (2006a), Tonelli and Petti (2009), Tissier et al (2011), Orszaghova et al (2012), McCabe et al (2013)), potential flow theory (Fructus and Grue (2007)), and the NavierStokes equations (see e.g. Hsiao and Lin (2010) for volume-of-fluid method, Ingram et al (2009) for free surface tracking implementation, and Rogers and Dalrymple (2008) for a smoothed particle hydrodynamics solver).…”

Section: Introductionmentioning

confidence: 99%

Importance of second-order wave generation for focused wave group run-up and overtopping

Orszaghova

Taylor

Borthwick

et al. 2014

Coastal Engineering

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Focused wave groups offer a means for coastal engineers to determine extreme run-up and overtopping events. Numerical predictions and laboratory measurements are presented for NewWave-type focused wave groups generated by a piston-type paddle generator, and interacting with a plane beach and a seawall in a wave basin. The numerical wave tank is based on the Boussinesq equations for non-breaking waves, and the non-linear shallow water equations for broken waves. Good agreement is achieved between the numerical predictions and laboratory measurements of free surface elevation, run-up distances and overtopping volumes for the test cases driven by linear paddle signals. Errors in run-up distance and overtopping volume are then assessed by repeating the test cases using second-order accurate wave generation signals. Focused wave groups generated using first-order wave-maker theory are found to be substantially contaminated by a preceding long error wave, resulting in erroneously enhanced run-up distances and overtopping volumes. Thus, the use of secondorder wave-maker theory for wave group run-up and overtopping experiments is instead recommended.

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Random wave runup and overtopping a steep sea wall: Shallow-water and Boussinesq modelling with generalised breaking and wall impact algorithms validated against laboratory and field measurements

Cited by 56 publications

References 18 publications

Vulnerability Analysis of the Venetian Littoral and Adopted Mitigation Strategy

Vulnerability Analysis of the Venetian Littoral and Adopted Mitigation Strategy

Role of Beach Morphology in Wave Overtopping Hazard Assessment

Importance of second-order wave generation for focused wave group run-up and overtopping

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