New Suspended Sand Concentration Model for Breaking Waves

Conference paper


Lim, G., Jayaratne, R. and Shibayama, T. 2020. New Suspended Sand Concentration Model for Breaking Waves. International Conference on Coastal Engineering, 2020. Online 06 - 09 Oct 2020 Coasts, Oceans, Ports and Rivers Institute. https://doi.org/10.9753/icce.v36v.sediment.32
AuthorsLim, G., Jayaratne, R. and Shibayama, T.
TypeConference paper
Abstract

Process-based morphodynamic modelling suites (as well as other process-based models) are often considered to be inefficient and unsuitable for simulating medium- to long-term morphodynamics due to the various theoretical (e.g. robustness of sediment transport models) and practical (e.g. computational costs) limitations. In particular, a lack of knowledge of sediment transport processes and how they relate to hydrodynamics makes the application of short-term models to long-term coastal evolution challenging. Even the state-of-the-art coastal area modelling suites (such as Delft3D and MIKE21) consist of relatively simple physics, relying instead on numerous semi-empirical parameterizations, which are often poorly supported by measured data and/or physical process understanding. In particular, suspended sediment transport in the highly turbulent surf zone is poorly modelled under breaking wave conditions. Six existing suspended sand concentration (SSC) models were critically evaluated against four high-resolution datasets with field-scale breaking waves and co-located velocity and concentration measurements over multiple cross-shore zones (shoaling, breaking and inner-surf zones). A new improved concentration model was proposed based on a novel empirical relationship observed between local water depth and reference concentration, as well as latest process understanding and insights.

Year2020
ConferenceInternational Conference on Coastal Engineering, 2020
PublisherCoasts, Oceans, Ports and Rivers Institute
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File Access Level
Anyone
Publication dates
Online28 Dec 2020
Publication process dates
Deposited18 Jan 2021
Journal citation36v
ISSN2156-1028
Book titleProceedings of virtual Conference on Coastal Engineering, 2020
Book editorLynett, P.
ISBN978-0-9896611-5-7
Digital Object Identifier (DOI)https://doi.org/10.9753/icce.v36v.sediment.32
External resourceSession #109 - Gabriel Lim: New Suspended Sand Concentration Model for Breaking Waves
Copyright holder© 2020 The Authors
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