原文传递
Longshore Transport Estimation on Ofir Beach in Northwest Portugal: Sand-Tracer Experiment
| 题名： | Longshore Transport Estimation on Ofir Beach in Northwest Portugal: Sand-Tracer Experiment |
| 正文语种： | 英文 |
| 作者： | Sandra Fernández-Fernández;Paulo Baptista;Virginia A.Martins;Paulo A.Silva;Tiago Abreu;Joaquim Pais-Barbosa;Cristina Bernardes;Paulo Miranda;Mariana V.L.Rocha;Fábio Santos;Ana Bernabeu;Daniel Rey |
| 作者单位： | GEOMA, Univ;Campus Univ, de Santiago; |
| 关键词： | Sand tracers; Longshore sediment transport; Bulk formulas; Mesotidal conditions; Ofir Beach. |
| 摘要： | This 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 (US ACE Waterways Experiment Station's Coastal Engineering and Research Center, Kamphuis, and Bay ram 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 = 0.75 Tp=11.5 s,θb=8-12°). The LST was estimated by using a linear sediment trans-port flux approach. The obtained value (2.3 x 10ˉ³ m³ · sˉ¹) approached the estimation provided by the original Bay ram formula (2.5 x 10ˉ³ m³ · sˉ¹). 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 Bay ram formula may give satisfactory results for predicting the longshore sediment transport on Ofir Beach. |
| 出版日期： | 2016.2 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Waterway, Port, Coastal, and Ocean Engineering |
| 卷： | Vol.142 |
| 期： | No.2 |
| 页码： | 04015017 |
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