scholarly journals COMPARISON OF NUMERICAL MODELS FOR WAVE OVERTOPPING AND IMPACT ON A SEA WALL

2014 ◽  
Vol 1 (34) ◽  
pp. 5 ◽  
Author(s):  
Dieter F.A. Vanneste ◽  
Corrado Altomare ◽  
Tomohiro Suzuki ◽  
Peter Troch ◽  
Toon Verwaest
Keyword(s):  
Numerical Models ◽  
Wave Overtopping ◽  
Sea Wall

scholarly journals VERTICAL SEA WALL CREST MODIFICATIONS FOR OVERTOPPING

2018 ◽  
pp. 71
Author(s):  
Dogan Kisacik ◽  
Gulizar Ozyurt Tarakcioglu ◽  
Cuneyt Baykal ◽  
Gokhan Kaboglu
Keyword(s):  
Urban Areas ◽  
Vertical Wall ◽  
Breaking Wave ◽  
Limited Information ◽  
Coastal Structures ◽  
Wave Overtopping ◽  
Wave Basin ◽  
First Results ◽  
Set Up ◽  
Sea Wall

Crest modifications such as a storm wall, parapet or a bullnose are widely used to reduce the wave overtopping over coastal structures where spatial and visual demands restrict the crest heights, especially in urban areas. Although reduction factors of these modifications have been studied for sloped structures in EurOtop Manual (2016), there is limited information regarding the vertical structures. This paper presents the experimental set-up and first results of wave overtopping tests for a vertical wall with several different super structure types: a) seaward storm wall, b) sloping promenade, c) landward storm wall, d) stilling wave basin (SWB), e) seaward storm wall with parapet, f) landward storm wall on the horizontal promenade with parapet, g) landward storm wall with parapet, h) stilling wave basin (SWB) with parapet, under breaking wave conditions. The SWB is made up of a seaward storm wall (may be a double shifted rows) , a sloping promenade (basin) and a landward storm wall. The seaward storm wall is partially permeable to allow the evacuation of the water in the basin.

scholarly journals Benchmarking of numerical models for wave overtopping at dikes with shallow mildly sloping foreshores: Accuracy versus speed

2020 ◽  
Vol 130 ◽  
pp. 104740 ◽  
Author(s):  
Christopher H. Lashley ◽  
Barbara Zanuttigh ◽  
Jeremy D. Bricker ◽  
Jentsje van der Meer ◽  
Corrado Altomare ◽  
...  
Keyword(s):  
Numerical Models ◽  
Wave Overtopping

scholarly journals EXPECTED DISCHARGE OP IRREGULAR WAVE OVERTOPPING

1968 ◽  
Vol 1 (11) ◽  
pp. 54 ◽  
Author(s):  
Senri Tsuruta ◽  
Yoshimi Goda
Keyword(s):  
Vertical Wall ◽  
Laboratory Data ◽  
Irregular Waves ◽  
Linear Summation ◽  
Wave Overtopping ◽  
Irregular Wave ◽  
Concrete Blocks ◽  
Vertical Walls ◽  
Expected Values ◽  
Sea Wall

An experiment was carried out on the overtopping of mechanically generated irregular waves over vertical walls. The experimental discharge was almost in agreement with the expected discharge which had been calculated with the wave height histogram and the data of regular wave overtopping based on the principle of linear summation. The expected values of overtopping discharge were calculated for various laboratory data, which had been represented in a unified form of non-dimensional quantities. The calculation has yielded two diagrams of expected overtopping discharge, one for the sea wall of vertical wall type and the othei for the sea wall covered with artificial concrete blocks.

A NUMERICAL SIMULATION OF THE WOS AND THE WAVE PROPAGATION ALONG A COASTAL DIKE

2012 ◽  
Vol 1 (33) ◽  
pp. 49 ◽  
Author(s):  
Panayotis Prinos ◽  
Maria Tsakiri ◽  
Dimitris Souliotis
Keyword(s):  
Numerical Simulation ◽  
Wave Propagation ◽  
Free Surface ◽  
Numerical Models ◽  
Field Measurements ◽  
Air Entrainment ◽  
Empirical Relationships ◽  
Wave Overtopping ◽  
Unsteady Rans ◽  
The Waves

Wave overtopping and the propagation of the waves on the crest and the landward slope of a coastal dike is investigated numerically. Wave overtopping conditions are simulated using the concept of the Wave Overtopping Simulator (WOS). Two numerical models of the WOS are constructed using the FLUENT 6.0.12 (FLUENT Inc. 2001) and the FLOW 3D 9.4 (FLOW 3D 2010) CFD codes. The former simulates the WOS without accounting for air entrainment while the latter accounts for air entrainment. The unsteady RANS equations, the RNG k-ε turbulence model and the VOF method are solved numerically, for "tracking" the free surface and the head of the "current" from the dike crest to the landward dike slope. The computed results from the two models are compared with each other and also against field measurements and proposed empirical relationships (Van der Meer et al. 2010).

STUDY ON CHARACTERISTICS OF TRANSPORT OF SPRAY AND SOUND ENVIRONMENT BY NON-WAVE-OVERTOPPING TYPE SEA WALL

2000 ◽  
Vol 16 ◽  
pp. 297-302
Author(s):  
Yuji Kamikubo ◽  
Isao Irie ◽  
Keisuke Murakami ◽  
Kazunori Kanda ◽  
Keiichiro Ayukawa ◽  
...  
Keyword(s):  
Wave Overtopping ◽  
Sound Environment ◽  
Sea Wall

scholarly journals FIELD AND MODEL STUDY ON THE PROTECTION OF RECREATIONAL BEACH AGAINST WAVE ACTION

1974 ◽  
Vol 1 (14) ◽  
pp. 84
Author(s):  
Norio Tanaka
Keyword(s):  
Field Tests ◽  
Difficult Problem ◽  
Protective Measures ◽  
Environmental Preservation ◽  
Wave Overtopping ◽  
Model Study ◽  
Recreational Beach ◽  
Artificial Nourishment ◽  
Sea Wall ◽  
The Waves

The heightening of a sea wall is often proposed for the purpose of decreasing the amount of wave-overtopping. In a recreation beach, however, the heightening of sea wall is undesirable from the view-point of environmental preservation and beach utilization. In this paper, instead of it, a proposal is made of the sea wall with a wide frontal step as well as the widening of beach by artificial nourishment. The frontal step is not only effective to decrease the amount of wave-overtopping, but also serves as a promenade for visitors. The widening of beach is known to serve to decrease wave-overtopping as well as to increase the utility for recreation. However, the protection of the nourished beach itself becomes sometimes a difficult problem. In this paper, the hydraulic characteristics of a wide frontal step and the effect of several protective measures for the nourished beach are described on the basis of model and field tests conducted for the improvement of Suma Beach. Suma Beach is a recreational beach situated west of Kobe Port as shown in Fig. 1. The shore-line is about 2 km long and runs from east to west (Fig.11). The beach profile, as shown in Fig.2, has the narrow backshore at about 3 m above L.W.L. and a small step at about 1.5 m below L.W.L. The beach slope is 1/10 in the foreshore, 1/25-1/30 between 2 and 5 m below L.W.L and 1/60-1/80 in the offshore beyond about 6 m below L.W.L. The waves are predominant from the direction of SSW so that the beach materials tend to move eastward along the shore.

scholarly journals RESEARCHES ON SEA-WALLS

1970 ◽  
Vol 1 (12) ◽  
pp. 88
Author(s):  
S. Nagal
Keyword(s):  
Incident Wave ◽  
Wave Energy ◽  
Precast Concrete ◽  
Recent Decade ◽  
Point Of View ◽  
Industrial Firms ◽  
Wave Overtopping ◽  
Port Facilities ◽  
Sea Wall ◽  
Incident Wave Energy

In the recent decade, very wide areas of sea where the depths of water are from several meters to ten meters or more during storms have been reclaimed for industrial firms and port facilities in many places in Japan As the incident wave energy in such cases is very large at the sea-walls, the protection of the reclaimed lands from wave overtopping by the conventional sea-walls of vertical type or composite-slope«and-berai type is generally impossible from an economical point of view In Japan a special type of sea-wall, which is of such a type that a rubble-mound covered with specially shaped precast concrete armor blocks is built in front of the sea-wall to absorb most of the incident wave energy, has been constructed to protect the reclaimed lands from wave overtopping Most of the seawalls have been proved satisfactory after passing of typhoons over or near the sea-walls The design of the sea-walls is presented here in by showing the comparisons between the experiments and prototypes during typhoons.

scholarly journals Prediction of Mean Wave Overtopping Discharge Using Gradient Boosting Decision Trees

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1703 ◽  
Author(s):  
Joost P. den Bieman ◽  
Josefine M. Wilms ◽  
Henk F. P. van den Boogaard ◽  
Marcel R. A. van Gent
Keyword(s):  
Machine Learning ◽  
Decision Trees ◽  
Numerical Models ◽  
Input Parameter ◽  
Design Criterion ◽  
Machine Learning Techniques ◽  
Gradient Boosting ◽  
Wave Overtopping ◽  
Learning Techniques ◽  
Machine Learning Model

Wave overtopping is an important design criterion for coastal structures such as dikes, breakwaters and promenades. Hence, the prediction of the expected wave overtopping discharge is an important research topic. Existing prediction tools consist of empirical overtopping formulae, machine learning techniques like neural networks, and numerical models. In this paper, an innovative machine learning method—gradient boosting decision trees—is applied to the prediction of mean wave overtopping discharges. This new machine learning model is trained using the CLASH wave overtopping database. Optimizations to its performance are realized by using feature engineering and hyperparameter tuning. The model is shown to outperform an existing neural network model by reducing the error on the prediction of the CLASH database by a factor of 2.8. The model predictions follow physically realistic trends for variations of important features, and behave regularly in regions of the input parameter space with little or no data coverage.

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