[EN] Results from a current meter and a transmissometer deployed at 5 meters above the seafloor atthe Ebro continental shelf have revealed the major process controlling the sediment resuspensionand transport at mid shelf depths. During this experiment; sediment fluxes along the shelf wereone order of magnitude higher than the sediment fluxes across the shelf, and the resultant of thetransport was towards the SSW and seaward. High current velocities induced by storm activitieswere the main contributor to the sediment transport, although waves only were able toresuspended surface sediments from the mid continental shelf during high energetic conditions(Hl/3 > 4.5 m and Tl/3 > II s). Fluctuations of the near-bottom suspended sedimentconcentrations showed a periodicity around 24 h and were linked to the changes of the intensityof the current velocity. Those diurnal fluctuations appear to be related with the breeze activity,which also generates near inertial internal waves with a periodicity of about 17 h. Those internalwaves caused strong fluctuations of the near-bottom temperature and salinity, although they donot appear to produce resuspension of the surface sediments at the mid shelf depths

[ES] Durante las últimas décadas los estudios de dinámica sedimentaria en las plataformas continentales han recibido un creciente interés, con el principal objetivo de identificar los procesos actuales que controlan el transporte de sedimento y el destino final de los aportes continentales introducidos en el medio marino. La dinámica sedimentaria en la plataforma continental del Delta del Ebro empezó a ser estudiada en detalle en el proyecto EBROMS (Maldonado y Nelson, 1990) durante el cual, utilizando datos obtenidos mediante el trípode instrumentado GEOPROBE fondeado a 60 m de profundidad, se obtuvieron las primeras series temporales simultáneas de parámetros hidrodinámicos y de concentración de sedimento en suspensión en la capa límite de fondo (Cacchione et al., 1990). [...]

V Congreso Geológico de España, 10-14 julio, 2000, Alicante.-- 5 pages, 4 figures