scholarly journals Wave run-up and overtopping over smooth and rock slopes of coastal structures without crown walls

2008 ◽  
Vol 36 (2) ◽  
pp. 157
Author(s):  
Janaka J Wijetunge
Keyword(s):  
Rock Slopes ◽  
Coastal Structures ◽  
Run Up

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 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 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.

Experimental simulation of tsunami surge and its interaction with coastal structure

2019 ◽  
Vol 11 (2) ◽  
pp. 258-280
Author(s):  
Omolbanin Farahmandpour ◽  
Abdul Kadir Marsono ◽  
Parham Forouzani ◽  
Masine Md. Tap ◽  
Suhaimi Abu Bakar
Keyword(s):  
Design Method ◽  
Design Guidelines ◽  
Experimental Simulation ◽  
Impulsive Force ◽  
Coastal Structures ◽  
Coastal Structure ◽  
Pressure Time ◽  
Time Histories ◽  
Force Components ◽  
Run Up

Following the tsunamis occurred in Japan (2011) and Indian Ocean (2004), investigating interaction between coastal structures and tsunamis became necessary. Although several attempts have been made to estimate the tsunami forces acting on the coastal structures, there still remain inconsistencies among the published design guidelines. This research includes an experimental study to investigate the interaction between a tsunami surge and a coastal structure. The tsunami surge was generated using a novel dam-break system, capable of generating higher tsunami surges than the previous simulations. The relations between surge velocity, surge depth, and surge-induced pressure on the structure were presented. In the surge-induced pressure–time histories, there were three identified force components, namely, run-up, impulsive and quasi-steady hydrodynamics. Furthermore, this research presents a comparison made between the experimental results and existing tsunami guidelines. The ratio of impulsive force to hydrodynamic force was found around 2.4 for each tsunami surge. The hydrodynamic forces were found to be higher with respect to those determined using the ‘Federal Emergency Management Agency’ FEMA P646 guidelines, whereas they were approximately in agreement with those obtained by FEMA 55. Moreover, the results showed that the ‘Structural Design Method of Building for Tsunami Resistance’ overestimates the impulsive force.

scholarly journals NUMERICAL SIMULATION OF IRREGULAR WAVES RUNUP ON A BEACH

2018 ◽  
pp. 41
Author(s):  
Luning Sun ◽  
Andrew Kennedy ◽  
Andrew Kennedy
Keyword(s):  
Numerical Simulation ◽  
Momentum Flux ◽  
Coastal Flooding ◽  
Coastal Areas ◽  
Irregular Waves ◽  
Breaking Wave ◽  
Coastal Structures ◽  
Run Up ◽  
Wave Induced

Breaking wave induced run-up can significantly risk infrastructure in coastal areas. For instance, run-up elevation can cause coastal flooding. Moreover, the momentum flux transported onshore can also exert forces on beaches and coastal structures. This study aims at predicting shoreline forces and inundation depths via numerical simulation as well as better understanding coastal run-up events.

Waves Run-Up and Overtopping Simulations Using Lagrangian Blocks

2009 ◽  
Author(s):  
Lai Wai Tan ◽  
Vincent H. Chu
Keyword(s):  
Experimental Data ◽  
Analytical Solution ◽  
Nonlinear Theory ◽  
Dam Break ◽  
Coastal Structures ◽  
Block Method ◽  
Wave Fronts ◽  
Oscillation Problem ◽  
Eulerian Mesh ◽  
Run Up

Wave run-up and overtopping of coastal structures are simulated using Lagrangian Blocks on Eulerian Mesh (LBEM). In the LBEM simulations, the blocks carry the mass and momentum. The movement of the blocks is calculated in a Lagrangian reference frame. The water depth defined by the volume blocks is non-negative. The wave fronts across the wet-and-dry interface are simulated by the block method without interruption by the oscillation problem that has limited the applicability of many existing computational methods. To evaluate the accuracy of the LBEM method in this paper, simulations are carried out for (i) the dam-break waves, (ii) the wave run-up on plane beach, and (iii) the overtopping of solitary waves over levee. The simulations of the dam-break wave have produced excellent agreement with the exact solutions by Ritter [1] and Stoker [2], and the semi-analytical solution by Sakkas and Strelkoff [3,4]. The simulations of the wave run-up on plane beach agree with the experimental data and the nonlinear theory of Synolakis [5]. The simulations of wave overtopping trapezoidal dike agree with the finite-volume simulations of Stansby [6]. The results have demonstrated the accuracy of the LBEM method and the versatility of the method for general wave simulations over variable terrain.

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