A major challenge facing climate change and sea level rise is to predict coastal evolution and in particular coastal erosion, which seems likely to increase in the next century. Coastal erosion affects many regions of the world, often highly populated. In addition to natural processes, coastal erosion is closely interrelated with anthropic activities such as sea defences or the reduction of river sediment supply (e.g. river dams and land use changes).
Several studies have already focused on predicting coastal change using more or less complex models on local scales. However, the majority of these models don’t take into account a component that seems important : the input of sediment from rivers. And there are also difficulties in adequately representing the shoreline evolution by a partial understanding of processes and the difficulty of obtaining detailed and long-term data describing the range.
The main objective of my study is therefore to create a simplified dynamic conceptual model on a global scale fed with new satellite observations of coastal ocean and sediment and to explore future scenarios of shoreline change with the identification of potentially vulnerable hotspots to improve sustainable coastal management strategies.