Wave attenuation due to Posidonia oceanica meadows

Sanchez-Gonzalez, JF; Sanchez-Rojas, V; Memos, CD

dc.contributor.author	Sanchez-Gonzalez, JF	en
dc.contributor.author	Sanchez-Rojas, V	en
dc.contributor.author	Memos, CD	en
dc.date.accessioned	2014-03-01T01:37:33Z
dc.date.available	2014-03-01T01:37:33Z
dc.date.issued	2011	en
dc.identifier.issn	0022-1686	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21551
dc.subject	Drag coefficient	en
dc.subject	physical model	en
dc.subject	Posidonia oceanica	en
dc.subject	vegetation field	en
dc.subject	wave damping	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Water Resources	en
dc.subject.other	Drag forces	en
dc.subject.other	Empirical parameters	en
dc.subject.other	Experimental studies	en
dc.subject.other	Exponential decays	en
dc.subject.other	Model materials	en
dc.subject.other	Physical model	en
dc.subject.other	Posidonia oceanica	en
dc.subject.other	Random waves	en
dc.subject.other	Semi-empirical	en
dc.subject.other	Test programme	en
dc.subject.other	Wave attenuation	en
dc.subject.other	wave damping	en
dc.subject.other	Wave height transformation	en
dc.subject.other	Wave heights	en
dc.subject.other	Wave steepness	en
dc.subject.other	Reynolds number	en
dc.subject.other	Water waves	en
dc.subject.other	Drag coefficient	en
dc.subject.other	drag coefficient	en
dc.subject.other	energy conservation	en
dc.subject.other	experimental study	en
dc.subject.other	random wave	en
dc.subject.other	Reynolds number	en
dc.subject.other	seagrass meadow	en
dc.subject.other	submerged vegetation	en
dc.subject.other	wave attenuation	en
dc.subject.other	wave damping	en
dc.subject.other	wave height	en
dc.title	Wave attenuation due to Posidonia oceanica meadows	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/00221686.2011.552464	en
heal.identifier.secondary	http://dx.doi.org/10.1080/00221686.2011.552464	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	An experimental study carried out in a flume to a scale of 1/20 is presented to assess the wave height attenuation induced by submerged meadows of Posidonia oceanica. After examination of the appropriate scaling laws and selection of the model material, an extensive test programme included both regular and random waves. A semi-empirical formulation for estimating the wave height transformation along the meadow is obtained, based on energy conservation and considering that dissipation is only due to drag forces. The latter were linearized to obtain an exponential decay law. The formulation proposed depends on the drag coefficient and includes also an empirical parameter accounting for wave steepness. The model improves previous results and extends its applicability to random waves. The drag coefficient associated to the meadows is found to be better related to the Keulegan-Carpenter parameter than to the Reynolds number. Its value is given also for models proposed by others. © 2011 Copyright International Association for Hydro-Environment Engineering and Research.	en
heal.publisher	TAYLOR & FRANCIS LTD	en
heal.journalName	Journal of Hydraulic Research	en
dc.identifier.doi	10.1080/00221686.2011.552464	en
dc.identifier.isi	ISI:000294213700008	en
dc.identifier.volume	49	en
dc.identifier.issue	4	en
dc.identifier.spage	503	en
dc.identifier.epage	514	en