GLOBEX

globex1Nonlinear transformations undergone by  waves approaching the shore are accompanied by  long period  oscillations induced by the groups of waves.

A wave's nonlinearity is crucial for the transport of sediment accretion making it responsible for beach erosion. While in steep beaches nonlinear processes occur locally, the nonlinearity in extended beaches is significant, as this has the potential of developing over larger temporal and spatial scales.

Currently, there are gaps in the knowledge of many aspects of hydrodynamics related to outstretched beaches propagation and interaction of long and short waves and how these oscillations affect sediment transport. In this context, the GLOBEX (Gently sloping Beach Experiments) project was carried  out within the European program HYDRALAB. Physical experiments were conducted in the Scheldt wave flume channel located in Holland in which a beach with a concrete slope of 1:80 was built.

The goals of the project were to focus on the study of some of the main aspects of the nonlinearity of the waves, long wave dissipation in the surf zone, wave speed and boundary layer dynamics. The high spatial and temporal resolution adopted during the tests was collected in an extensive database used to improve understanding of the hydrodynamic processes in beaches.

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