Resuspensión de sedimento en la plataforma interna del delta del Ebro

Abstract

This study deals with the resuspension processes in the inner shelf of the Ebro delta using field measurements of hydrodynamics and suspended sediment distribution in the water column. Two instrumented tripods were simultaneously deployed at 8.5 and 12.5 m of water depth across a profile perpendicular to the shoreline. The record analysed corresponds to a period of increasing wave activity, from fair-weather conditions (no sediment movement) to storm conditions. Critical wave conditions for sediment entrainment in both field sites were determined. The comparison of measurements indicates that the temporal variability of the measured parameters displays a similar behaviour between both field sites, although the intensity of processes is higher in the shallower site.

Resuspension processes in tideless shelves affected by short-period waves are restricted to wave-storm conditions and, in addition, only the shallow area of the shelf can be affected