Print Email Facebook Twitter The impact of storms and stratification on sediment transport in the Rhine region of freshwater influence Title The impact of storms and stratification on sediment transport in the Rhine region of freshwater influence Author Flores, Raúl P. (University of Washington; Universidad Técnica Federico Santa María) Rijnsburger, S. (TU Delft Environmental Fluid Mechanics) Horner-Devine, Alexander R. (University of Washington) Souza, Alejandro J. (National Oceanography Center) Pietrzak, J.D. (TU Delft Environmental Fluid Mechanics) Date 2017-05-01 Abstract We present measurements of along and across-shore sediment transport in a region of the Dutch coast 10 km north of the Rhine River mouth. This section of the coast is characterized by strong vertical density stratification because it is within the midfield region of the Rhine region of freshwater influence, where processes typical of the far-field, such as tidal straining, are modified by the passage of distinct freshwater lenses at the surface. The experiment captured two storms, and a wide range of wind, wave, tidal and stratification conditions. We focus primarily on the mechanisms leading to cross-shore sediment flux at a mooring location in 12 m of water, which are responsible for the exchange of sediment between the nearshore and the inner shelf. Net transport during storms was directed offshore and influenced by cross-shelf winds, while net transport during spring tides was determined by the mean state of stratification. Tidal straining dominated during neap tides; however, cross-shore transport was negligible due to small sediment concentrations. The passage of freshwater lenses manifested as strong pulses of offshore transport primarily during spring tides. We observe that both barotropic and baroclinic processes are relevant for cross-shore transport at depth and, since transport rates due to these competing processes were similar, the net transport direction will be determined by the frequency and sequencing of these modes of transport. Based on our observations, we find that wind and wave-driven transport during storms tends move fine sediment offshore, while calmer, more stratified conditions move it back onshore. Subject density stratificationplume frontsRhine ROFIriver plumesediment transporttidal straining To reference this document use: https://doi.org/10.4233/uuid:4a45c51f-d862-4301-b95f-6d705f6e8374 DOI https://doi.org/10.1002/2016JC012362 Embargo date 2017-12-01 ISSN 2169-9275 Source Journal Of Geophysical Research-Oceans, 122 (5), 4456-4477 Part of collection Institutional Repository Document type journal article Rights © 2017 Raúl P. Flores, S. Rijnsburger, Alexander R. Horner-Devine, Alejandro J. Souza, J.D. Pietrzak Files PDF Flores_et_al_2017_Journal ... Oceans.pdf 4.56 MB Close viewer /islandora/object/uuid:4a45c51f-d862-4301-b95f-6d705f6e8374/datastream/OBJ/view