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Longshore Transport Estimation on Ofir Beach in Northwest Portugal: Sand-Tracer Experiment

2015-10Journal article Restricted access
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dc.contributor.authorFernández-Fernández, Sandra
dc.contributor.authorBaptista, Paulo
dc.contributor.authorMartins, Virgínia A.
dc.contributor.authorSilva, Paulo A.
dc.contributor.authorAbreu, Tiago
dc.contributor.authorPais-Barbosa, Joaquim
dc.contributor.authorBernardes, Cristina
dc.contributor.authorMiranda, Paulo
dc.contributor.authorRocha, Mariana V. L.
dc.contributor.authorSantos, Fábio
dc.contributor.authorBernabeu, Ana
dc.contributor.authorRey, Daniel
dc.date.accessioned2016-01-20T14:45:47Z
dc.date.available2016-01-20T14:45:47Z
dc.date.issued2015-10
dc.description.abstractThis work aims to shed some light on longshore sediment transport (LST) in the highly energetic northwest coast of Portugal. Data achieved through a sand-tracer experiment are compared with data obtained from the original and the new re-evaluated longshore sediment transport formulas (USACE Waterways Experiment Station’s Coastal Engineering and Research Center, Kamphuis, and Bayram bulk formulas) to assess their performance. The field experiment with dyed sand was held at Ofir Beach during one tidal cycle under medium wave-energy conditions. Local hydrodynamic conditions and beach topography were recorded. The tracer was driven southward in response to the local swell and wind- and wave-induced currents (Hsb=0.75mHsb=0.75m, Tp=11.5sTp=11.5s, θb=8−12°θb=8−12°). The LST was estimated by using a linear sediment transport flux approach. The obtained value (2.3×10−3m3⋅s−12.3×10−3m3⋅s−1) approached the estimation provided by the original Bayram formula (2.5×10−3m3⋅s−12.5×10−3m3⋅s−1). The other formulas overestimated the transport, but the estimations resulting from the new re-evaluated formulas also yield approximate results. Therefore, the results of this work indicated that the Bayram formula may give satisfactory results for predicting the longshore sediment transport on Ofir Beach.pt_PT
dc.identifier.doi10.1061/(ASCE)WW.1943-5460.0000319pt_PT
dc.identifier.issn1943-5460
dc.identifier.urihttp://hdl.handle.net/10400.22/7423
dc.language.isoengpt_PT
dc.publisherAmerican Society of Civil Engineerspt_PT
dc.relation.ispartofseriesJournal of Waterway, Port, Coastal, and Ocean Engineering;
dc.relation.publisherversionhttp://ascelibrary.org/doi/abs/10.1061/(ASCE)WW.1943-5460.0000319pt_PT
dc.subjectSand tracerspt_PT
dc.subjectLongshore sediment transportpt_PT
dc.subjectBulk formulaspt_PT
dc.subjectMesotidal conditionspt_PT
dc.subjectOfir Beachpt_PT
dc.titleLongshore Transport Estimation on Ofir Beach in Northwest Portugal: Sand-Tracer Experimentpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleJournal of Waterway, Port, Coastal, and Ocean Engineeringpt_PT
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT

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