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Tsunami-induced morphological change – A model-based impact assessment of the 1755 tsunami in NE Atlantic from the Morocco coast

2018-10-15Journal article Restricted access
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dc.contributor.authorRamalho, Inês
dc.contributor.authorOmira, Rachid
dc.contributor.authorEL MOUSSAOUI, Said
dc.contributor.authorBaptista, Maria Ana Carvalho Viana
dc.contributor.authorZaghloul, M. N.
dc.date.accessioned2018-11-27T12:36:56Z
dc.date.available2018-11-27T12:36:56Z
dc.date.issued2018-10-15
dc.description.abstractTsunamis can be responsible for coastal geomorphic crises. Extensively inundated coasts can suffer widespread and dramatic changes in their morphology due to sediment erosion, transport, and deposition processes. In this paper, we investigate the tsunami-induced morphological changes on coasts prone to inundation and how sediment transport is controlled by both tsunami and sediment characteristics. We focus on a tsunami-prone coast in the NE Atlantic, Tangier-Morocco, that experienced the 1755 Lisbon tsunami. We use a coupled hydrodynamic and morphodynamic numerical model, together with high-resolution digital elevation and sedimentary models, to simulate the impact of tsunamis on the morphology and sediment distribution of Tangier Bay. Due to the uncertainty on the source and effects of the 1755 event, we consider two 1755-like tsunamigenic scenarios that have the potential to cause different levels of inundation. Results show that the coastal zone of Tangier can undergo substantial changes in morphology and sediment distribution following the tsunami impact. For the selected scenarios, the volume of sediments mobilized, at both the offshore and onshore zones of the Tangier site, ranges from 30,000 to 200,000 m3. Moreover, the presence of mobile sediments and conditions favoring tsunami shoaling lead to an increase in wave impact on the coastal configuration. Conversely, the presence of the breakwaters helps to protect the Tangier coast by limiting the extent of the affected area. The results of this study suggest that the assessment of tsunami-induced coastal impact should include the effect on morphology.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRAMALHO, I.; [et al] – Tsunami-induced morphological change – A model-based impact assessment of the 1755 tsunami in NE Atlantic from the Morocco coast. Geomorphology. ISSN 0169-555X. Vol. 319 (2018), pp. 78-91pt_PT
dc.identifier.doihttps://doi.org/10.1016/j.geomorph.2018.07.013pt_PT
dc.identifier.issn0169-555X
dc.identifier.issn1872-695X
dc.identifier.urihttp://hdl.handle.net/10400.21/9090
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://reader.elsevier.com/reader/sd/pii/S0169555X18302757?token=5A0B26B69E69A21DF6793E0E6BBD210E43F234C02A76F010C54B96035A01F0BB5F8C2E71E6E143599B74CBAF6571A839pt_PT
dc.subjectTsunamipt_PT
dc.subjectGeomorphological changespt_PT
dc.subjectAlteração Geomorfológicapt_PT
dc.titleTsunami-induced morphological change – A model-based impact assessment of the 1755 tsunami in NE Atlantic from the Morocco coastpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage91pt_PT
oaire.citation.startPage78pt_PT
oaire.citation.titleGeomorphologypt_PT
oaire.citation.volume319pt_PT
person.familyNameVieira Lopes Ramalho
person.familyNameOmira
person.familyNameEL MOUSSAOUI
person.familyNamede Carvalho Viana Baptista
person.givenNameMaria Inês
person.givenNameRachid
person.givenNameSaid
person.givenNameMARIA ANA
person.identifier972486
person.identifierhttps://scholar.google.pt/citations?user=ApQ9Bp4AAAAJ&hl=pt-PT
person.identifier.ciencia-idB71E-3259-E2FE
person.identifier.ciencia-idC116-66FF-BB9B
person.identifier.ciencia-idCF12-1EE3-F49B
person.identifier.orcid0000-0001-8697-0881
person.identifier.orcid0000-0002-6198-7588
person.identifier.orcid0000-0002-0271-1485
person.identifier.orcid0000-0002-6381-703X
person.identifier.ridN-2533-2013
person.identifier.scopus-author-id34971883700
person.identifier.scopus-author-id56373405500
person.identifier.scopus-author-idhttps://www.scopus.com/authid/detail.uri?authorId=7102934075
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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