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101067

Wave Hydrodynamic Characteristics of Vertical and Sloped Seawalls.

Article

Last updated: 04 Jan 2025

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Subjects

-

Tags

Irrigation and Hydraulic Engineering

Abstract

The hydrodynamic performance of vertical and sloped plane, rectangular serrated, and triangular serrated seawalls were investigated experimentally in terms of wave reflection coefficient, kr, relative wave run-up, Rup < /sub>/Hi, and relative wave run-down, Rdown/Hi, using physical model studies. Regular waves of wide rang of heights, and periods were used. Tests were carried out for different inclinations of seawall (i.e. ), relative dissipater blocks spacing (s/w =1.0, 2.0, 3.0), and a constant water depth of 0.4 m. It was observed that the rectangular serrated seawall was superior to the triangular serrated and plane seawall in reducing the hydrodynamic parameters mentioned above. As well it was found that the relative spacing of dissipater blocks, s/w, wave steepness, Hi/Li, and the relative water depth, d/Li were better influencing parameters compared to the surf similarity parameter (Iribarren N0),  in predicting the wave hydrodynamic parameters. Both rectangular and triangular serrated seawalls gives a good results for all hydrodynamic parameters when, s/w=2.0 compared to s/w equal to1.0 and 3.0. A total performance evaluation was done in terms of a single parameter called  hydrodynamic performance parameter, and it was found that for s/w=2.0, both rectangular and triangular serrations reduces this parameter by about 37% and 28% respectively compared with the plane seawall. The worst results for performance parameter were observed when , while the optimum values occur when, s/w equal to (2.21-2.27), and (2.34-2.41) for the rectangular and triangular serrated seawalls respectively.  Simple predictive equations were developed for estimating the wave reflection coefficients, relative run-up, and relative run-down by using non-linear regression analysis by SPSS.16 (SPSS Inc, 2006) software.

DOI

10.21608/bfemu.2020.101067

Keywords

Regular waves, Wave hydrodynamics, Wave breaking, Iribarren No, Seawalls

Authors

First Name

Kasem

Last Name

El Alfy

MiddleName

Salah Abd El Wahab

Affiliation

Prof. of Hydraulics, Mansoura University, Dean of Mansoura High Institute of Eng. And Technology

Email

amrorana2003@yahoo.com

City

Mansoura

Orcid

-

First Name

O.

Last Name

Rageh

MiddleName

S.

Affiliation

Prof., Irrigation & Hydraulics Dept, Fac. of Engrg, EL-Mansoura Univ

Email

-

City

-

Orcid

-

First Name

K.

Last Name

Nassar

MiddleName

A.

Affiliation

Demonstrator, Irrigation & Hydraulics Dept., Fac. of Engrg., EL-Mansoura Univ

Email

-

City

-

Orcid

-

Volume

40

Article Issue

1

Related Issue

15305

Issue Date

2015-03-01

Receive Date

2014-12-08

Publish Date

2020-07-06

Page Start

1

Page End

18

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 40_Issue 1_Pages 1-18.pdf

PDF . 1.7MB

Link

https://bfemu.journals.ekb.eg/article_101067.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=101067

Order

18

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

Wave Hydrodynamic Characteristics of Vertical and Sloped Seawalls.

Details

Type

Article

Created At

22 Jan 2023