Sediment dynamics over sand ridges on a tideless mid-outer continental shelf
16 pages, 14 figures, 1 table
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| Format: | artículo biblioteca |
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Elsevier
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| Subjects: | ABS measurements, Intrawave bottom boundary layer, Continental shelf, Sediment resuspension, Sand ridge, |
| Online Access: | http://hdl.handle.net/10261/113462 |
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dig-icm-es-10261-1134622024-10-21T11:13:20Z Sediment dynamics over sand ridges on a tideless mid-outer continental shelf Simarro, Gonzalo Guillén, Jorge Puig, Pere Ribó, Marta Lo Iacono, Claudio Palanques, Albert Muñoz, Araceli Durán, Ruth Acosta-Yepes, Juan ABS measurements Intrawave bottom boundary layer Continental shelf Sediment resuspension Sand ridge 16 pages, 14 figures, 1 table A sand ridge field with crests oriented NE-SW (52°) located between 55 and 85m water depth on the Valencia continental shelf (Spain) was mapped with multibeam swath bathymetry and characterized with seismic profiling and sediment sampling. Boundary-layer hydrodynamic measurements conducted over a sand ridge at 66m depth show evidence of wave and current sediment resuspension during a major storm event with a three-year recurrence period. From the measured intrawave sediment concentration profiles it is shown that the suspended sediment time evolution is related not only to mean currents but also to the wave field. The near-bottom shear stress generated during storm conditions reached around 1N/m2 and was able to resuspend and transport sandy and muddy sediments for more than 32h. The total suspended sediment transport in a layer of 1m above the bottom was around 4000kg per meter width and directed 160°.It is argued that these sand ridges were developed in a shallow environment and there is no evidence of present-day ridge migration or morphological degradation. It is hypothesized that sediment dynamics affecting sand ridges during storms favors the maintenance of their morphology. © 2015 Elsevier B.V. G. Simarro was supported by the Spanish Government through the Ramón y Cajal program. This research was supported by the projects COSTEM (CTM2009-07806), FORMED (CGL2012-33989) and BUS2 (CGL2011–22964). [...] M. Ribó is supported by a FPI grant (Ref. BES-2010-029949) from the Spanish Ministry of Economy and Competitiveness. R. Durán acknowledges a CSIC JAE-Doc contract co-funded by the FSE Peer Reviewed 2015-03-01 2015-04-10T07:12:12Z artículo http://purl.org/coar/resource_type/c_6501 issn: 0025-3227 Marine Geology 361: 25-40 (2015) http://hdl.handle.net/10261/113462 10.1016/j.margeo.2014.12.005 https://doi.org/10.1016/j.margeo.2014.12.005 none Elsevier |
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ABS measurements Intrawave bottom boundary layer Continental shelf Sediment resuspension Sand ridge ABS measurements Intrawave bottom boundary layer Continental shelf Sediment resuspension Sand ridge |
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ABS measurements Intrawave bottom boundary layer Continental shelf Sediment resuspension Sand ridge ABS measurements Intrawave bottom boundary layer Continental shelf Sediment resuspension Sand ridge Simarro, Gonzalo Guillén, Jorge Puig, Pere Ribó, Marta Lo Iacono, Claudio Palanques, Albert Muñoz, Araceli Durán, Ruth Acosta-Yepes, Juan Sediment dynamics over sand ridges on a tideless mid-outer continental shelf |
| description |
16 pages, 14 figures, 1 table |
| format |
artículo |
| topic_facet |
ABS measurements Intrawave bottom boundary layer Continental shelf Sediment resuspension Sand ridge |
| author |
Simarro, Gonzalo Guillén, Jorge Puig, Pere Ribó, Marta Lo Iacono, Claudio Palanques, Albert Muñoz, Araceli Durán, Ruth Acosta-Yepes, Juan |
| author_facet |
Simarro, Gonzalo Guillén, Jorge Puig, Pere Ribó, Marta Lo Iacono, Claudio Palanques, Albert Muñoz, Araceli Durán, Ruth Acosta-Yepes, Juan |
| author_sort |
Simarro, Gonzalo |
| title |
Sediment dynamics over sand ridges on a tideless mid-outer continental shelf |
| title_short |
Sediment dynamics over sand ridges on a tideless mid-outer continental shelf |
| title_full |
Sediment dynamics over sand ridges on a tideless mid-outer continental shelf |
| title_fullStr |
Sediment dynamics over sand ridges on a tideless mid-outer continental shelf |
| title_full_unstemmed |
Sediment dynamics over sand ridges on a tideless mid-outer continental shelf |
| title_sort |
sediment dynamics over sand ridges on a tideless mid-outer continental shelf |
| publisher |
Elsevier |
| url |
http://hdl.handle.net/10261/113462 |
| work_keys_str_mv |
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1816137485106806784 |