Print Email Facebook Twitter Wave Generation of Gravity-Driven Sediment Flows on a Predominantly Sandy Seabed Title Wave Generation of Gravity-Driven Sediment Flows on a Predominantly Sandy Seabed Author Flores, Raúl P. (University of Washington; Universidad Técnica Federico Santa María) Rijnsburger, S. (TU Delft Environmental Fluid Mechanics) Meirelles, Saulo (TU Delft Coastal Engineering) Horner-Devine, Alexander R. (University of Washington) Souza, Alejandro J. (CINVESTAV Unidad Merida) Pietrzak, J.D. (TU Delft Environmental Fluid Mechanics) Henriquez, M. (TU Delft Coastal Engineering) Reniers, A.J.H.M. (TU Delft Environmental Fluid Mechanics) Date 2018-08-16 Abstract Wave-supported gravity flows (WSGFs) generate rates of sediment flux far exceeding other cross-shelf transport processes, contributing disproportionately to shelf morphology and net cross-shelf fluxes of sediment in many regions worldwide. However, the conditions deemed necessary for the formation of WSGF limit them to a narrow set of shelf conditions; they have been observed exclusively in regions where the seabed consists of very fine-grained sediment and typically co-occur with nearby river flood events. Here we document the occurrence of a WSGF event on a predominantly sandy seabed and in the absence of a preceding river flood. Our measurements confirm that the dynamics are governed by the friction-buoyancy balance observed in other WSGF and that WSGF can form in mixed grain-size environments and transport high concentrations of sand. The occurrence of WSGF on a predominantly sandy seabed suggests that they may occur under a much wider range of conditions and, given the global prevalence of sandy shelves, they may be a more frequent and more ubiquitous feature of shelf dynamics than previously thought. Subject cross-shelf transportmarine gravity-driven flowssandy seabedsediment transportwave-supported gravity flows To reference this document use: http://resolver.tudelft.nl/uuid:1837f76c-87af-40c6-9144-9c83165bf176 DOI https://doi.org/10.1029/2018GL077936 ISSN 0094-8276 Source Geophysical Research Letters, 45 (15), 7634-7645 Part of collection Institutional Repository Document type journal article Rights © 2018 Raúl P. Flores, S. Rijnsburger, Saulo Meirelles, Alexander R. Horner-Devine, Alejandro J. Souza, J.D. Pietrzak, M. Henriquez, A.J.H.M. Reniers Files PDF Flores_et_al_2018_Geophys ... etters.pdf 1.67 MB Close viewer /islandora/object/uuid:1837f76c-87af-40c6-9144-9c83165bf176/datastream/OBJ/view