Please use this identifier to cite or link to this item: https://doi.org/10.1680/eacm.10.00044
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dc.titleDraw-down and run-up of tsunami waves on sloping beaches
dc.contributor.authorKlettner, C.
dc.contributor.authorBalasubramanian, S.
dc.contributor.authorHunt, J.
dc.contributor.authorFernando, H.
dc.contributor.authorVoropayev, S.
dc.contributor.authorEames, I.
dc.date.accessioned2016-07-08T09:28:22Z
dc.date.available2016-07-08T09:28:22Z
dc.date.issued2012
dc.identifier.citationKlettner, C., Balasubramanian, S., Hunt, J., Fernando, H., Voropayev, S., Eames, I. (2012). Draw-down and run-up of tsunami waves on sloping beaches. Proceedings of the Institution of Civil Engineers: Engineering and Computational Mechanics 165 (2) : 119-129. ScholarBank@NUS Repository. https://doi.org/10.1680/eacm.10.00044
dc.identifier.issn17550777
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/125538
dc.description.abstractThe dynamics of waves and their interaction with a beach depends on whether the leading wave component is elevated or depressed. These differences are explained in this paper using a hydraulic model and the principle of conservation of impulse. Laboratory experiments of depression waves, conducted using a novel wavemaker, are compared with model predictions. Over a sloping beach, these waves have a nearly constant V-shaped depression trailed by a growing Λ-shaped positive wave. The shoreline recedes over a significant distance, caused by shoreward water being drawn into the V-shaped depression. When the trailing Λ-shaped positive wave breaks, an energetic hydraulic bore develops and moves up the beach. The hydraulic model leads to general formulae for wave slopes, draw-down and run-up. The run-up of negative waves can be larger or smaller than that of positive waves, depending on the wave amplitude and beach parameters. The predictions are compared with results from photographs of depression waves taken during the 2004 Sumatra tsunami. Similar phenomena occurred in Japan in 2011. By incorporating up/down amplitude data in new tsunami warning systems, the properties of tsunamis on beaches could be estimated in real time using the present work, thus improving emergency response strategies. In future, the damage associated with tsunami waves, depending on coastal parameters, could increase with rising sea levels, erosion and destruction of coral reefs, and the loss of Arctic sea-ice.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1680/eacm.10.00044
dc.sourceScopus
dc.subjectMathematical modelling
dc.subjectModels (physical)
dc.subjectWeather
dc.typeArticle
dc.contributor.departmentOBSTETRICS & GYNAECOLOGY
dc.description.doi10.1680/eacm.10.00044
dc.description.sourcetitleProceedings of the Institution of Civil Engineers: Engineering and Computational Mechanics
dc.description.volume165
dc.description.issue2
dc.description.page119-129
dc.identifier.isiut000215452200006
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