Evolution of longshore beach contour lines determined by the E.O.F. method
- Muñoz Pérez, Juan José
- Medina Santamaría, Raúl
- Tejedor Alvarez, Begoña
ISSN: 0214-8358
Year of publication: 2001
Volume: 65
Issue: 4
Pages: 393-402
Type: Article
More publications in: Scientia Marina
Abstract
Detailed topo-bathymetric levellings were performed biannually for four years at Victoria Beach (Cadiz, Spain) after a beach renourishment carried out in Spring 1991. The subsequent time series were analysed using the Empirical Orthogonal Functions (EOF) method. The evolution of some characteristic longshore contour lines, such as the Highest High Water Level and the Lowest Low Water Level, is studied. The mean coastal line is related to the first spatial EOF mode. Furthermore, an objective criterion for distinguishing between a generalised recession and cyclic accretion-erosion processes due to seasonal sea-swell changes is described, and a uniformly clockwise turn of the shoreline to minimise longshore transport is identified.