Water-wave induced groundwater pressure and flow in variable bathymetry regions and sandy beaches by an enhanced coupled-mode model

Belibassakis, KA

dc.contributor.author	Belibassakis, KA	en
dc.date.accessioned	2014-03-01T02:14:55Z
dc.date.available	2014-03-01T02:14:55Z
dc.date.issued	2012	en
dc.identifier.issn	00298018	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30176
dc.subject	Coupled modes	en
dc.subject	Permeable bed	en
dc.subject	Porous flow	en
dc.subject	Variable bathymetry	en
dc.subject	Water waves	en
dc.subject.other	Coastal regions	en
dc.subject.other	Coupled mode	en
dc.subject.other	Elastic motions	en
dc.subject.other	Evanescent mode	en
dc.subject.other	Fast convergence	en
dc.subject.other	Groundwater pressure	en
dc.subject.other	Interface conditions	en
dc.subject.other	Measured data	en
dc.subject.other	Momentum equation	en
dc.subject.other	Numerical results	en
dc.subject.other	Permeable bed	en
dc.subject.other	Porous flow	en
dc.subject.other	Porous medium	en
dc.subject.other	Sandy beach	en
dc.subject.other	Sea bottom	en
dc.subject.other	Series expansion	en
dc.subject.other	Stiffness ratios	en
dc.subject.other	Variable bathymetry	en
dc.subject.other	Vertical eigenvalue problem	en
dc.subject.other	Water columns	en
dc.subject.other	Wave pressure	en
dc.subject.other	Coastal zones	en
dc.subject.other	Eigenvalues and eigenfunctions	en
dc.subject.other	Groundwater	en
dc.subject.other	Groundwater flow	en
dc.subject.other	Numerical methods	en
dc.subject.other	Porous materials	en
dc.subject.other	Surface waters	en
dc.subject.other	Water waves	en
dc.subject.other	Bathymetry	en
dc.subject.other	bathymetry	en
dc.subject.other	groundwater flow	en
dc.subject.other	modeling	en
dc.subject.other	porous medium	en
dc.subject.other	pressure effect	en
dc.subject.other	stiffness	en
dc.subject.other	water column	en
dc.subject.other	water wave	en
dc.title	Water-wave induced groundwater pressure and flow in variable bathymetry regions and sandy beaches by an enhanced coupled-mode model	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.oceaneng.2012.03.015	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.oceaneng.2012.03.015	en
heal.publicationDate	2012	en
heal.abstract	An enhanced coupled-mode system is developed for modelling wave-induced pressure and groundwater flow in variable bathymetry coastal regions, in the layer under the permeable seabed. The sea bottom is assumed of general shape, characterised by sloping parts and undulations, without restrictions concerning mildness of bottom slope and curvature. The present model is based on a simplified version of the storage and momentum equations, corresponding to large values of stiffness ratio of the porous medium, permitting prediction of wave-induced groundwater pressure and flow in the case when the elastic motion of the seabed is very small and could be approximately neglected. The representation of the wave pressure field is based on a local-mode series expansion in the water column and the porous medium, consisted of propagating and evanescent modes, and defined by formulating and solving vertical eigenvalue problems at each local horizontal position. The latter series is enhanced by appropriate terms (the sloping-interface mode) enabling consistent satisfaction of the interface conditions at the seabed and providing fast convergence. Numerical results are presented and compared against predictions by other methods and measured data, illustrating the applicability of the present model to variable bathymetry coastal regions and sandy beaches. © 2012 Elsevier Ltd. All rights reserved.	en
heal.journalName	Ocean Engineering	en
dc.identifier.doi	10.1016/j.oceaneng.2012.03.015	en
dc.identifier.volume	47	en
dc.identifier.spage	104	en
dc.identifier.epage	118	en