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Development of topo-bathymetric continuum profiles for coastal barriers with global open-access data

dc.contributor.authorFanti, Valeria
dc.contributor.authorLoureiro, Carlos
dc.contributor.authorFerreira, Óscar
dc.date.accessioned2025-05-19T09:24:58Z
dc.date.available2025-05-19T09:24:58Z
dc.date.issued2025-04
dc.description.abstractCoastal barriers are dynamic and vulnerable coastal environments exposed to storms and rising sea levels, requiring a thorough understanding of their physical and geomorphological characteristics. Despite this, high-resolution topo-bathymetric data are not openly available for most of the world's coastal areas, preventing accurate estimation of the exposure to storms and associated risks. Global models of topography and bathymetry, derived from remote sensing techniques, are available worldwide as an open-source solution to characterise coastal morphology. However, their coarse resolution, limited vertical and horizontal accuracy, alongside inconsistencies in the transition from land to the shallow nearshore zone, make their use in coastal areas challenging, requiring careful evaluation. This study investigates the potential and limitations of four recent open-access satellite-derived topographic models (Copernicus GLO-30 DEM, AW3D30, TanDEMX, Euro-Maps 3D) and three bathymetric models (GEBCO_2023, SRTM15+, ETOPO 2022) in five coastal barriers. It proposes a new approach to integrate global models to provide a consistent representation of the topo-bathymetric continuum profile in coastal areas characterised by a barrier morphology. Coastal barrier profiles, representative of natural sectors and characterized by morphological homogeneity, were derived by merging global topographic and bathymetric digital elevation models and implementing an equilibrium profile in the transition zone. The profiles obtained from the global models were compared with higher resolution local or regional topo-bathymetry. The global topographies tend to underestimate the dune top, with TanDEM-X giving the best results in terms of dune crest height and beach slope. The barrier continuum profiles that merged TanDEM-x and ETOPO 2022 global models were found to have the lowest error, with a vertical RMSE of 0.76 m. Based on integration of these remotely sensed models, it is possible to determine average representative coastal barrier profiles suitable for use in global to regional coastal studies or in data-poor areas, potentially serving as a cost-effective tool for preliminary coastal hazard assessments and early warning systems at wide spatial scales.eng
dc.identifier.doi10.1016/j.rsase.2025.101528
dc.identifier.issn2352-9385
dc.identifier.urihttp://hdl.handle.net/10400.1/27129
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationAquatic Research Infrastructure Network
dc.relation.ispartofRemote Sensing Applications: Society and Environment
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBarrier profiles
dc.subjectGlobal models
dc.subjectSatellite topography
dc.subjectNearshore bathymetry
dc.subjectCoastal hazards
dc.titleDevelopment of topo-bathymetric continuum profiles for coastal barriers with global open-access dataeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAquatic Research Infrastructure Network
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0069%2F2020/PT
oaire.citation.startPage101528
oaire.citation.titleRemote Sensing Applications: Society and Environment
oaire.citation.volume38
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameFanti
person.familyNameLoureiro
person.familyNameFerreira
person.givenNameValeria
person.givenNameCarlos
person.givenNameÓscar
person.identifier453264
person.identifier.ciencia-id2C10-0A7C-C90E
person.identifier.ciencia-id011D-31BD-C6B6
person.identifier.ciencia-id1F1C-DF44-94C9
person.identifier.orcid0000-0003-3117-3492
person.identifier.orcid0000-0001-9975-0036
person.identifier.ridU-9863-2018
person.identifier.scopus-author-id23667861200
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
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relation.isAuthorOfPublication0da09945-415f-4574-a444-268a1c05b544
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relation.isProjectOfPublication.latestForDiscovery5af011f9-3888-449a-a18c-d08b59e87091

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