Author(s): Luis Ivens Portela
Linked Author(s): Luís Ivens Portela
Keywords: No Keywords
Abstract: Sand waves in the seaward part of the main channel of the Tagus estuary are examined. The study is based on high-resolution surveys conducted in 2019 and 2020. The average wavelength and height were found to be about 80 m and 2 m, respectively, and the asymmetry and evolution between surveys indicate that migration is mainly ebb-directed. The results suggest that sediment transported northwards by waves and flood currents over the main ebb-tidal delta shoal (Cachopo Sul) is partly mobilised by the ebb-dominant currents along the edge of the shoal and ultimately recirculated in a counterclockwise direction.
Year: 2024