Numerical study of nearshore hydrodynamics and morphology changes behind offshore breakwaters under actions of waves using a sediment transport model coupled with the SWASH model

Phung Dang Hieu, Vinh N. Phan, Viet T. Nguyen, Thanh V. Nguyen, H. Tanaka

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents the results of numerical study on the wave-induced currents and morphology changes due to the complicated interaction between waves and a sandy beach with shore-parallel breakwaters set on. The study was based on the SWASH wave model coupled with a sediment transport model developed in this research. The simulated results of the coupling model were compared with the published laboratory experimental data. The good agreements were obtained for both wave-induced currents and formation of salient and tombolo behind breakwaters. The models were also applied for studying the evolution of wave-induced currents associated with topography changes of a sandy beach. The wave-induced currents and sediment transport processes have a strong relationship and their interaction could reach a quasi-equilibrium state in which the changes of current pattern and bathymetry become very slow. Numerical results of shoreline response mode were also compared with a published empirical formula and confirmed good agreements.

Original languageEnglish
Pages (from-to)553-565
Number of pages13
JournalCoastal Engineering Journal
Volume62
Issue number4
DOIs
Publication statusPublished - 2020 Dec

Keywords

  • SWASH
  • Sediment transport model
  • beach erosion
  • wave-induced currents

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Ocean Engineering

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