Marc Robin

Sediment fluxes in coastal areas

Preface.- Part I: Sediment Fluxes Changes Link to Climatic Change during Holocene.- The Turritella Layer: a Potentiel Proxy of a Drastic Holocene Environmental Change on the North-east Atlantic Coast.- The Influence of Recent Deglaciation and Associated Sediment Flux on the Functioning of Polar Coastal Zone - Northern Petuniabukta, Svalbard.- Geomorphic Changes in the Rhone Delta during the LIA: Input from the Analysis of Ancient Maps.- Part II: Studies CAS about Sediment Fluxes in Three Different Climatic Zones (Wet tropical, Semi-arid, Temperate) during Anthropocene.- Mud and Sand Flux in a Context of Sediment Heterogeneity on the Mud-dominated Coast of French Guiana.- The Coastal Sediment Provenance and their Distribution in the Mediterranean Beaches of NW Morocco.- The Hydro-sedimentary System of the Haute-Normandy Coast: Synthesis.- Part III: The Use of Modelling Approaches of Sediment Fluxes at a Higher Spatial and Temporal Scale.- Sediment Exchange Through the Inlets of the Venice Lagoon.- Tidal Inlet Dynamics and Relocation in Response to Artificial Breaching.- Sediment Transport Formulae for Coastal Morphodynamic Simulation: Calculated Sediment Flux against in situ Data.- Part IV: Extremes Events and Sediment Fluxes: The Case of Tsunamis.- Tsunamis: Impacts on Sediment Flux and Sediment Cells.

Tidal Inlet Dynamics and Relocation in Response to Artificial Breaching

This chapter addresses the relations between inlet dynamics and nearshore wave regime at a coastal lagoon in the Atlantic coast of Morocco. The study of wave climate indicates a southward trend for the net annual longshore sediment transport, which modifies previously reported conclusions fundamented upon limited series of observations on waves and interpretation of the inlet geomorphology. The snapshot images used here to characterize the morphodynamic behavior of the inlet indicate that its mobility is driven essentially by the northward component of the wave-borne longshore energy flux and transport, thus bearing no direct relation with the net annual residue of longshore energy flux and sediment transport; we interpret this as a result of contrasting effectiveness in early wave energy dissipation induced by shoal fields populating the nearshore north and south of the inlet. Moulay Bousselham inlet illustrates a case where geomorphological interpretation of coastal features may be insufficient to support inferences on coastal hydrodynamics.