On the Effect of Current on Wave Run-Up and Wave Overtopping

Lorke, Stefanie; Brüning, Anja; Meer, Jentsje van der; Schüttrumpf, Holger; Bornschein, Antje; Gilli, Stefano; Pohl, Reinhard; Špano, Miroslav; Říha, Jaromír; Werk, Stefan; Schlütter, Flemming

doi:10.9753/icce.v32.structures.13

Cited by 16 publications

(20 citation statements)

References 14 publications

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“…These 2%-exceedance parameters were related to incident wave conditions and dike freeboard. Van der Meer, et al (2010) combined the earlier data with additional data from the small-scale Flowdike experiments (Lorke, et al 2010a(Lorke, et al , 2010b, and a re-analysis of the data provided revised equations for the 2%-exceedance maximum flow thickness and 2%-exceedance maximum velocity on the crest of a smooth dike, i.e.,…”

Section: Characterization Of the 2% Exceedance Parametersmentioning

confidence: 99%

Improvements in Describing Wave Overtopping Processes

Hughes

Thornton

Meer³

et al. 2012

Int. Conf. Coastal. Eng.

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This paper presents a new empirical relation for the shape factor in the Weibull distribution that describes the distribution of overtopping wave volumes. This improvement increases the applicable range of the Weibull distribution from very low average overtopping discharges to large discharges resulting from combined wave overtopping and steady surge overflow at negative freeboards. The effect this improvement has on wave overtopping simulation is also discussed. Measured maximum flow thicknesses, velocities, and discharges from experiments of combined wave and surge overtopping are examined to learn more about the variability of these key parameters as a function of individual overtopping wave volumes. A key finding is that wave volumes containing the 2%-exceedance value of maximum velocity typically have maximum flow thicknesses well below the 2%-exceedance level, and viceversa. Furthermore, the 2%-exceedance hydrodynamic parameters do not occur in the 2%-exceedance wave volumes. Finally, empirical relationships are developed for several parameters that showed strong trends.

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Section: Characterization Of the 2% Exceedance Parametersmentioning

confidence: 99%

Improvements in Describing Wave Overtopping Processes

Hughes

Thornton

Meer³

et al. 2012

Int. Conf. Coastal. Eng.

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“…The prediction of the wave overtopping process over barriers is fundamental to properly design seawalls, breakwaters, sea dikes and, more generally, structures that have the aim to protect inland areas from sea waves. For this reason, a large number of studies (e.g., [1][2][3][4][5]) has been carried out in the past years with the aim of giving estimation to the fundamental parameters that govern the aforementioned phenomenon. These studies led to the development of modern overtopping prediction formulae [6].…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of Wave Overtopping of Barriers

Cannata

Tamburrino

Ferrari

et al. 2020

Water

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We present a study of wave overtopping of barriers. The phenomenon of the wave overtopping over emerged structures is reproduced both numerically and experimentally. The numerical simulations are carried out by a numerical scheme for three-dimensional free-surface flows, which is based on the solution of the Navier–Stokes equations in a novel integral form on a time-dependent coordinate system. In the adopted numerical scheme, a novel wet–dry technique, based on the exact solution of the Riemann problem over the dry bed, is proposed. The experimental tests are carried out by adopting a nonintrusive and continuous-in-space image-analysis technique, which is able to properly identify the free surface even in very shallow waters or breaking waves. A comparison between numerical and experimental results, for several wave and water-depth conditions, is shown.

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“…The second approach attempts to describe the influence of current on the wave parameters which are later used for the prediction of wave run-up. Based on the results of Lorke et al (2010a) it is concluded that both approaches are practicable. Both approaches were applied with respect to standards used in Germany and the Netherlands which are summarized in Eurotop-Manual (2007).…”

Section: Literature Reviewmentioning

confidence: 99%

“…The first study on the interaction of waves and current was performed by Lorke et al (2010a) and Lorke et al (2010b). It is focused on wave -current interaction and it introduces two principal approaches.…”

Section: Literature Reviewmentioning

confidence: 99%

“…A similar approach is described in Van der Meer et al (1998) or EurotopManual (2007), which provide a good overview of the present state of crest level design for coastal structures. Together with the run-up height the overtopping amount and its effect on the dike is often a studied topic (Eurotop-Manual, 2007;Lorke et al 2010b). In case of overtopping the dike is usualy assumed as broad crested weir with rough surface (Goodarzi et al, 2012;Parilkova et al, 2012).…”

Section: Literature Reviewmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Current on the Height of Wind Wave Run-Up: A comparison of experimental results with the Czech National Standard

Říha¹,

Špano²

2012

Journal of Hydrology and Hydromechanics

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One of the basic questions related to the safety of dikes and river levees is the size of the freeboard. One of the important parameters for freeboard design is the height of waves and wave run-up on levee slopes. Routine and standardised calculations of wave run-up deal with the freeboards of dams where wind waves originate on the still water of the reservoir. In the case of running water in streams (thereinafter only "currents") the effect of wave and current interaction on wave run-up is usually not taken into account due to the lack of reliable knowledge regarding the phenomenon. In the Czech Republic this question is topical in the case of large rivers such as the Elbe, the Vltava and the Morava. Within the framework of the projects Hydralab III and NAZV QI 92A139, hydraulic research and further analysis focused on wave run-up as a result of the combination of current and wind wave parameters were performed. The laboratory research was carried out in a hydraulic flume with a wavemaker on the right bank and a levee with a slope of 1:3 installed on the left bank opposite the wavemaker. Waves were generated both perpendicular and oblique to the levee axis; the angle of oblique wave attack varied within the range of ± 30°. The aim of this paper is to compare the results of the mentioned research with recommendations mentioned in the Czech National Standard CSN 75 0255 Calculation of wave effects on water structures and to quantify the effect of current on the wave run-up height. Jednou ze základních otázek spojených s bezpečností hráze je návrh převýšení její koruny nad maximální hladinou vzdouvané vody. Důležitým parametrem ovlivňujícím návrh převýšení je výška vln vybíhajících po svahu hráze. Běžné postupy výpočtu výšky výběhu vlny na svah jsou realizovány za předpokladu, že vlny vznikají na stojatých vodách. Vliv proudění se obvykle vzhledem k nízké úrovni znalostí tohoto jevu na tekoucích vodách zanedbává. V podmínkách České Republiky je otázka vlivu proudění na výšku výběhu relevantní zejména na velkých tocích jako Labe, Vltava nebo Morava. V rámci projektů Hydralab III a NAZV QI 92A139 byl uskutečněn hydraulický výzkum a analýza dat se speciálním zaměřením na výšku výběhu větrových vln při započtení vlivu proudění. Výzkum byl realizován na modelu hráze se sklonem svahu 1 : 3, který byl umístěn ve zkušební nádrži osazené vlnoproduktorem vedeným rovnoběžně s modelem hráze. Vlny zde byly generovány jednak kolmo vzhledem k podélné ose hráze, jednak šikmo v rozsahu úhlů ± 30°. Výsledky výzkumu byly porovnány s doporučeními uvedenými v České státní normě ČSN 75 0255 Výpočet účinků vln na stavby na vodních nádržích a zdržích.KLÍČOVÁ SLOVA: ochranná hráz, hrázka, větrová vlna, výška vlny, výběh vlny, proudění, návrh převýšení.

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On the Effect of Current on Wave Run-Up and Wave Overtopping

Cited by 16 publications

References 14 publications

Improvements in Describing Wave Overtopping Processes

Improvements in Describing Wave Overtopping Processes

Numerical and Experimental Investigation of Wave Overtopping of Barriers

The Influence of Current on the Height of Wind Wave Run-Up: A comparison of experimental results with the Czech National Standard

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