The complex sediment transport pattern on a spit-platform in the Danish WaddenrnSea during low energy conditions is described in this paper. Current velocities at fourrnstations on a spit-platform were measured to describe the transport pattern. Sediment entersrnthe spit-platform as longshore migrating sand bars which migrate along the shore until theyrnreach an ebb-dominated tidal channel, Hobo Dyb. Close to the ebb dominated tidal channel,rnthe sediment is transported towards the southwest by the ebb currents. This southwestwardrnmigration continues until the sand enters a dissecting ebb channel on the spit-platform. Inrnthe ebb channel the sediment is transported back towards the west and deposited on an ebbrntidal delta. Wave currents on the ebb tidal delta bypass the sediment further south. Thisrnzigzag pattern continues until the sediment is no longer affected by the tidal currents ofrnHobo Dyb. In the zone between the influence of Hobo Dyb and the main tidal channel,rnGr(a)dyb, the sediment is deposited until currents transport it into Gr(a)dyb or onto the tidalrnflats in the lagoon.
展开▼
