Hydrodynamique tidale du lagon de Mayotte : observations in-situ et modélisation

This paper investigates the hydrodynamics in the Mayotte lagoon. For that purpose, eight pressure and current sensors were deployed on the lagoon sea bed, around the main island and in the coral reef inlets, during one month, in November-December 2007. The data were processed in order to extract and to characterise the tidal components of the water level and current. A 2DH hydrodynamic model is set up. The measurement and model results give a picture of the tidal hydrodynamics at the lagoon scale. They put forward: (1) the spatial variability of the tidal components, (2) the spatial variability of tidal currents, reaching 1 m/s in the inlets. Mots-cles : Mayotte – lagon – courants – maree – modelisation – code MARS.