scholarly journals WAVE RUN-UP AND OVERTOPPING IN RUBBLE-MOUND BREAKWATERS UNDER OBLIQUE WAVE INCIDENCE

2020 ◽  
pp. 23
Author(s):  
Maria Teresa Reis ◽  
Joao Alfredo Santos ◽  
Conceicao Juana Fortes ◽  
Rute Lemos ◽  
Rita Carvalho ◽  
...  
Keyword(s):  
Wave Steepness ◽  
Stability Studies ◽  
Coastal Structures ◽  
Extreme Wave ◽  
Data Gaps ◽  
Run Up ◽  
Rubble Mound Breakwaters ◽  
Wave Incidence ◽  
Existing Data ◽  
Sea Level Rise Impacts

The existing data gaps triggered the interest in developing the present experimental work, whose main goal is to contribute to a new whole understanding of the phenomena to mitigate future sea level rise impacts in European coastal structures, including the run-up and overtopping characterization on rough and permeable slopes. The key point is to extend the range of wave steepness values in run-up, overtopping and armour layer stability studies, focusing on oblique extreme wave conditions and on their effects on a sloping breakwater's trunk armour and roundhead. Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/sHxoaocYuL0

Wave RUN-UP Measurements under very oblique wave incidence

2021 ◽  
Vol 42 (1) ◽  
pp. 81-90
Author(s):  
Rute Lemos ◽  
Vera Pina ◽  
João Alfredo Santos ◽  
Conceição Fortes ◽  
Maria Teresa Reis ◽  
...  
Keyword(s):  
Physical Modelling ◽  
Stability Studies ◽  
Extreme Wave ◽  
Wave Basin ◽  
Rubble Mound ◽  
Run Up ◽  
Access Project ◽  
Multidirectional Wave ◽  
Rubble Mound Breakwaters ◽  
Wave Incidence

Under the scope of the HYDRALAB+ transnational access project, the so-called RODBreak experiment was conducted in the multidirectional wave basin at the Marienwerden facilities of the Leibniz University Hannover (LUH). A stretch of a rubble-mound breakwater was built in the wave basin with a very gentle slope. Its armour layer was made of Antifer cubes, at the roundhead and adjoining trunk, and of rock, at the rest of the trunk. A set of tests was carried out to extend the range of wave steepness values analysed in wave run-up, overtopping and armour layer stability studies, focusing on oblique extreme wave conditions, with incident wave angles from 40º to 90º. The present study focuses on the analysis of measured wave run-up values obtained in the tests and on their on their variability as well as the influence of the wave obliquity and directional spreading. Keywords: rubble-mound breakwaters; run-up; oblique waves; physical modelling; RODbreak.

3-D Scale Model Study of Wave Run-Up, Overtopping and Damage in a Rubble-Mound Breakwater Subject to Oblique Extreme Wave Conditions

2019 ◽  
Vol 396 ◽  
pp. 32-41 ◽  
Author(s):  
João Alfredo Santos ◽  
Francisco Pedro ◽  
Mário Coimbra ◽  
Andrés Figuero ◽  
Conceição Juana E.M. Fortes ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Wave Structure ◽  
Scale Model ◽  
Wave Steepness ◽  
Extreme Wave ◽  
Empirical Formulas ◽  
Wave Basin ◽  
Rubble Mound ◽  
Wave Conditions ◽  
Run Up

A set of scale-model tests carried out to enlarge the range of wave steepness values analysed in run-up, overtopping and armour layer stability studies, focusing on oblique extreme wave conditions and on their effects on a gentler slope breakwater’s trunk armour and roundhead, is presented in this paper. A stretch of a rubble mound breakwater (head and part of the adjoining trunk, with a slope of 1(V):2(H)) was built in a wave basin at the Leibniz University Hannover to assess, under extreme wave conditions (wave steepness of 0.055) with different incident wave angles (from 40º to 90º), the structure behaviour in what concerns wave run-up, wave overtopping and damage progression of the armour layer. Two types of armour elements (rock and Antifer cubes) were tested. Non-intrusive methodologies including a new application of laser scanning technique for the assessment of both armour layer damage and wave run-up and overtopping were used. It is expected that such work will contribute also with data to improve empirical formulas as well as to validate complex numerical model for wave-structure interaction.

scholarly journals EXTREME WAVE PRESSURES AND LOADS ON A PILE-SUPPORTED WHARF DECK - INFLUENCES OF AIR GAP AND WAVE DIRECTION

2018 ◽  
pp. 5
Author(s):  
Andrew Cornett
Keyword(s):  
Offshore Structures ◽  
Model Tests ◽  
Scale Model ◽  
Extreme Waves ◽  
Wave Direction ◽  
Coastal Structures ◽  
Extreme Wave ◽  
Wave Impact ◽  
The Past ◽  
Water Depths

Many deck-on-pile structures are located in shallow water depths at elevations low enough to be inundated by large waves during intense storms or tsunami. Many researchers have studied wave-in-deck loads over the past decade using a variety of theoretical, experimental, and numerical methods. Wave-in-deck loads on various pile supported coastal structures such as jetties, piers, wharves and bridges have been studied by Tirindelli et al. (2003), Cuomo et al. (2007, 2009), Murali et al. (2009), and Meng et al. (2010). All these authors analyzed data from scale model tests to investigate the pressures and loads on beam and deck elements subject to wave impact under various conditions. Wavein- deck loads on fixed offshore structures have been studied by Murray et al. (1997), Finnigan et al. (1997), Bea et al. (1999, 2001), Baarholm et al. (2004, 2009), and Raaij et al. (2007). These authors have studied both simplified and realistic deck structures using a mixture of theoretical analysis and model tests. Other researchers, including Kendon et al. (2010), Schellin et al. (2009), Lande et al. (2011) and Wemmenhove et al. (2011) have demonstrated that various CFD methods can be used to simulate the interaction of extreme waves with both simple and more realistic deck structures, and predict wave-in-deck pressures and loads.

Numerical Investigation of Wave Period Influence on Long Wave Run-Up on Slope With Rigid Vegetation

2016 ◽  
Author(s):  
Jun Tang ◽  
Yongming Shen
Keyword(s):  
Shallow Water Equations ◽  
Water Wave ◽  
Wave Period ◽  
Coastal Vegetation ◽  
Coastal Structures ◽  
Rigid Vegetation ◽  
Comparison With Experiment ◽  
Long Wave ◽  
Nonlinear Shallow Water Equations ◽  
Run Up

Coastal vegetation can not only provide shade to coastal structures but also reduce wave run-up. Study of long water wave climb on vegetation beach is fundamental to understanding that how wave run-up may be reduced by planted vegetation along coastline. The present study investigates wave period influence on long wave run-up on a partially-vegetated plane slope via numerical simulation. The numerical model is based on an implementation of Morison’s formulation for rigid structures induced inertia and drag stresses in the nonlinear shallow water equations. The numerical scheme is validated by comparison with experiment results. The model is then applied to investigate long wave with diverse periods propagating and run-up on a partially-vegetated 1:20 plane slope, and the sensitivity of run-up to wave period is investigated based on the numerical results.

Wave run-up on sloping coastal structures: prototype measurements versus scale model tests

2002 ◽  
pp. 233-244 ◽  
Author(s):  
Julien De Rouck ◽  
Peter Troch ◽  
Björn Van de Walle ◽  
Marcel R. A. Van Gent ◽  
Luc Van Damme ◽  
...  
Keyword(s):  
Model Tests ◽  
Scale Model ◽  
Coastal Structures ◽  
Run Up

scholarly journals Effect of wave steepness to relative wave run-up on OWEC breakwater

2020 ◽  
Vol 419 ◽  
pp. 012117
Author(s):  
A I D Puspita ◽  
M A Thaha ◽  
M S Pallu ◽  
F Maricar
Keyword(s):  
Wave Steepness ◽  
Run Up

scholarly journals Wave run-up on bermed coastal structures

2019 ◽  
Vol 86 ◽  
pp. 188-194 ◽  
Author(s):  
Karthika Pillai ◽  
Amir Etemad-Shahidi ◽  
Charles Lemckert
Keyword(s):  
Coastal Structures ◽  
Run Up

scholarly journals SURF SIMILARITY

1974 ◽  
Vol 1 (14) ◽  
pp. 26 ◽  
Author(s):  
J.A. Battjes
Keyword(s):  
Phase Difference ◽  
Incident Wave ◽  
Water Waves ◽  
Slope Angle ◽  
Wave Steepness ◽  
Similarity Parameter ◽  
General Terms ◽  
Depth Ratio ◽  
Run Up ◽  
Set Up

This paper deals with the following aspects of periodic water waves breaking on a plane slope breaking criterion, breaker type, phase difference across the surfzone, breaker height-to-depth ratio, run-up and set-up, and reflection. It is shown that these are approximately governed by a single similarity parameter only, embodying both the effects of slope angle and incident wave steepness. Various physical interpretations of this similarity parameter are given, while its role is discussed m general terms from the viewpoint of model prototype similarity.

scholarly journals Nonlinear run-ups of regular waves on sloping structures

2012 ◽  
Vol 12 (12) ◽  
pp. 3811-3820 ◽  
Author(s):  
T.-W. Hsu ◽  
S.-J. Liang ◽  
B.-D. Young ◽  
S.-H. Ou
Keyword(s):  
Boussinesq Equations ◽  
Irregular Waves ◽  
Coastal Structures ◽  
Regular Waves ◽  
Wave Flume ◽  
Coastal Risk ◽  
Run Up ◽  
Two Parameters ◽  
Prediction Capability ◽  
Good Agreement

Abstract. For coastal risk mapping, it is extremely important to accurately predict wave run-ups since they influence overtopping calculations; however, nonlinear run-ups of regular waves on sloping structures are still not accurately modeled. We report the development of a high-order numerical model for regular waves based on the second-order nonlinear Boussinesq equations (BEs) derived by Wei et al. (1995). We calculated 160 cases of wave run-ups of nonlinear regular waves over various slope structures. Laboratory experiments were conducted in a wave flume for regular waves propagating over three plane slopes: tan α =1/5, 1/4, and 1/3. The numerical results, laboratory observations, as well as previous datasets were in good agreement. We have also proposed an empirical formula of the relative run-up in terms of two parameters: the Iribarren number ξ and sloping structures tan α. The prediction capability of the proposed formula was tested using previous data covering the range ξ ≤ 3 and 1/5 ≤ tan α ≤ 1/2 and found to be acceptable. Our study serves as a stepping stone to investigate run-up predictions for irregular waves and more complex geometries of coastal structures.

scholarly journals WAVE RUN-UP PREDICTION VS. MODEL TEST RESULTS: A COMPARISON

1988 ◽  
Vol 1 (21) ◽  
pp. 47 ◽  
Author(s):  
Peter E. Gadd ◽  
Victor Manikian ◽  
Jerry L. Machemehl
Keyword(s):  
Physical Model ◽  
Model Test ◽  
Large Scale ◽  
Physical Model Test ◽  
Roughness Coefficient ◽  
Wave Steepness ◽  
Test Results ◽  
Shore Protection ◽  
Run Up

Large-scale physical model test measurements of wave run-up are compared with wave run-up prediction derived from the Shore Protection Manual (SPM). Noteworthy discrepancies between the results of these two methods have been identified that include substantial overestimation of wave run-up elevations using the SPM approach, and computation of roughness coefficient values that vary as a function of wave steepness. The slope armors tested in the study at model scales of 1:3 and 1:4 include linked concrete matting and overlapped gravel-filled fabric bags.

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