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Measurements of morphodynamic and hydrodynamic overwash processes in a large-scale wave flume

2016-07Journal article Restricted access
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dc.contributor.authorMatias, Ana
dc.contributor.authorMasselink, Gerd
dc.contributor.authorCastelle, Bruno
dc.contributor.authorBlenkinsopp, Chris E.
dc.contributor.authorKroon, Aart
dc.date.accessioned2017-04-07T15:56:26Z
dc.date.available2017-04-07T15:56:26Z
dc.date.issued2016-07
dc.description.abstractOverwash is an important process that controls short-term barrier dynamics, as well as long-term barrier migration, but this process is difficult to study in the field due to its rare occurrence and the challenging conditions under which it occurs. This paper uses data collected during the BARDEX II experiment in the Delta Flume, the Netherlands, where a proto-type barrier was subjected to a range of wave and water level conditions. The objectives of this research are to: (1) compare the morphologic response to overwash on a gravel barrier (BARDEX 2008 experiment) with that on a sandy barrier (BARDEX II); (2) understand the influence of wave period on overwash characteristics and sediment transport; and (3) improve current knowledge of overwash hydrodynamics. The comparative analysis shows that barrier overwash can be affected by negative feedback that stabilises the barrier through barrier crest accretion on gravel barriers, and by submerged bar development on sandy barriers. An increase in the wave period induced a reduction in overwash frequency over the crest, but no significant relation was found between wave peak period and overwash discharge. Nevertheless, overall water discharge during an overwash episode significantly correlates with overall overwash sediment transport rate. Overwash flow depths during the experiment were relatively shallow and velocities were similar compared to those measured during previous studies and reported in the literature. Despite the controlled laboratory conditions, collection of reliable and accurate measurements of overwash velocities remains challenging. (C) 2015 Elsevier B.V. All rights reserved.
dc.description.sponsorshipANR-14-ASTR-0004-01
dc.identifier.doi10.1016/j.coastaleng.2015.08.005
dc.identifier.issn0378-3839
dc.identifier.urihttp://hdl.handle.net/10400.1/9412
dc.language.isoeng
dc.peerreviewedyes
dc.relationRUSH - From runup to overwash
dc.relation.isbasedonWOS:000378454800004
dc.titleMeasurements of morphodynamic and hydrodynamic overwash processes in a large-scale wave flume
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleRUSH - From runup to overwash
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTE-GIX%2F116814%2F2010/PT
oaire.citation.endPage46
oaire.citation.startPage33
oaire.citation.titleCoastal Engineering
oaire.citation.volume113
oaire.fundingStream3599-PPCDT
person.familyNameMatias
person.givenNameAna
person.identifierR-000-116
person.identifier.ciencia-id2811-D7C1-1DE2
person.identifier.orcid0000-0003-2090-6291
person.identifier.ridE-9709-2013
person.identifier.scopus-author-id56260567900
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication3561d2b7-54a3-4ca9-a7c7-97014749414a
relation.isAuthorOfPublication.latestForDiscovery3561d2b7-54a3-4ca9-a7c7-97014749414a
relation.isProjectOfPublicationb32407f9-d18b-4a04-9692-edd0d54d1734
relation.isProjectOfPublication.latestForDiscoveryb32407f9-d18b-4a04-9692-edd0d54d1734

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