Prediction of non-breaking wave induced scour depth at the trunk section of breakwaters using Genetic Programming and Artificial Neural Networks

Pourzangbar, Ali; Losada, Miguel Á.; Saber, Aniseh; Ahari, Lida Rasoul; Larroudé, Philippe; Vaezi, Mostafa; Brocchini, Maurizio

doi:10.1016/j.coastaleng.2016.12.008

Cited by 32 publications

(13 citation statements)

References 24 publications

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“…It is robust, simple and universal, and has a strong ability to solve complex nonlinear problems. Such as the prediction of non-breaking wave induced scour depth at the trunk section of breakwaters 8 . Furthermore, based on laboratory experimental data, Koç et al 24 suggested that GP has good potential in solving complex problems in the field of coastal engineering.…”

Section: Genetic Programmingmentioning

confidence: 99%

“…Furthermore, some formulas are complicated in form and do not indicate the actual physical process, and the prediction accuracy needs to be improved. Predictive methods such as artificial neural networks (ANNs) and genetic programming (GP) can effectively deal with complex multivariate nonlinear problems, and have been used to estimate hydraulic characteristics [7][8][9] . The main advantage of using GP for symbolic regression is that there is no need to specify the size and shape of the approximation function in advance, and the specific knowledge of the problem can be included in the search process through an appropriate mathematical function 10 .…”

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confidence: 99%

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Prediction of Transmission Coefficients of Regular Wave Attenuation by Emergent Vegetation

Gong

Jie

Jiang

et al. 2021

Preprint

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Transmission coefficient (Kt) for wave attenuation by vegetation is essential parameter for predicting the wave height. In this paper, based on the experimental data of three kind of artificial vegetation model, genetic programming (GP), artificial neural networks (ANNs) and multivariate non-linear regression (MNLR) were used to analyze the dimensionless factors including Ursell number (Ur), relative width (RB) relative height (α) and volume fraction (φ). The proposed GP formulae were compared with MNLR and ANNs. The predictions of GP models were in good agreement with measured data, and outperformed MNLR equations. Otherwise, GP and ANNs were used to obtain the weight of each factor. The results can provide a reference for the artificial planting of the three plants.

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Section: Genetic Programmingmentioning

confidence: 99%

mentioning

confidence: 99%

Prediction of Transmission Coefficients of Regular Wave Attenuation by Emergent Vegetation

Gong

Jie

Jiang

et al. 2021

Preprint

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“…Examples of empirically‐based models are: Regression‐type models, Machine Learning Approaches (e.g. Pourzangbar et al, ), etc. and energetics‐type, which solve a sediment mass conservation equation (Exner equation) where the mass fluxes come from empirically‐based closure laws (e.g.…”

Section: Introductionmentioning

confidence: 99%

Wave‐forced dynamics in the nearshore river mouths, and swash zones

Brocchini

2019

Earth Surf Processes Landf

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The role of wave forcing on the main hydro-morphological dynamics evolving in the shallow waters of the nearshore and at river mouths is analyzed. Focus is mainly on the cross-shore dynamics that evolve over mildly sloping barred, dissipative sandy beaches from the storm up to the yearly time scale, at most. Local and nonlocal mechanisms as well as connections across three main interrelated subsystems of the nearshore-the region of generation and evolution of nearshore bars, river mouths and the swash zoneare analyzed. The beach slope is a major controlling parameter for all nearshore dynamics. A local mechanism that must be properly described for a suitable representation of wave-forced dynamics of all such three subsystems is the proper correlation between orbital velocity and sediment concentration in the bottom boundary layer; while specific dynamics are the wave-current interaction and bar generation at river mouths and the sediment presuspension at the swash zone. Fundamental nonlocal mechanisms are both Infragravity (IG) waves and large-scale horizontal vortices (i.e. with vertical axes), both influencing the hydrodynamics, the sediment transport and the seabed morphology across the whole nearshore. Major connections across the three subsystems are the upriver This article is protected by copyright. All rights reserved. This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/esp.4699 propagation of IG waves generated by breaking sea waves and swash-swash interactions, the interplay between the swash zone and along-river-flank sediment transport and the evolution of nearshore sand bars.

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“…The present measures against the scour can be mainly divided into two sections according to their principles: enhancing the stability of the erodible bed and modifying the flow structure. The former mainly includes toe protection [11], revetments [12, 13] and mattresses [14], while the latter includes groins [15, 16] and submerged breakwaters [17, 18]. However, many of the measures consolidating the stability of sediment on river bed and banks, like the revetments and mattresses, would lead to some environmental and ecological problems.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on bed pressure around geotextile mattress with sloping plate

Xie

Zhu

et al. 2019

PLoS ONE

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A geotextile mattress with sloping curtain is a newly proposed countermeasure against river and estuarine scour. In previous laboratory experiments, a geotextile mattress with sloping curtain was capable of protecting the bed downstream from scour and stimulating sediment deposition on both sides. However, the seepage scour under its geotextile mattress is inadequately researched at present. In this study, the Geotextile Mattress with Sloping Plate (GMSP) is proposed based on the simplification of the geotextile mattress with sloping curtain with the construction feasibility considered. A series of experiments was conducted to investigate the pressure distribution around the GMSP and the averaged seepage hydraulic gradient beneath its mattress. The results indicate remarkable pressure difference on two sides of the GMSP. The minimum bed pressure appears about 1.3 times the plate height downstream to the GMSP. The averaged seepage hydraulic gradient beneath the mattress increases with the sloping angle increasing from 35° to 60° in general. The averaged hydraulic gradient also ascends as the relative plate height increases, but reduces as the opening ratio increases at opening ratios greater than 0.143. The safety boundary for the averaged hydraulic gradient under the geotextile mattress of the GMSP could get much smaller than the critical hydraulic gradient of piping and can easily be overwhelmed. This phenomenon can mainly be attributed to the discontinuous contact between the mattress and the seabed. A suggestion for the parametric design of the GMSP is to extend the width of the mattress to reduce the risk of seepage failure.

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Prediction of non-breaking wave induced scour depth at the trunk section of breakwaters using Genetic Programming and Artificial Neural Networks

Abstract: International audienc

Cited by 32 publications

References 24 publications

Prediction of Transmission Coefficients of Regular Wave Attenuation by Emergent Vegetation

Prediction of Transmission Coefficients of Regular Wave Attenuation by Emergent Vegetation

Wave‐forced dynamics in the nearshore river mouths, and swash zones

Experimental study on bed pressure around geotextile mattress with sloping plate

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