4:45 PM - 5:00 PM
[ACG42-12] Sediment transport and morphology change in coastal areas
Keywords:coastal erosion, sediment budget, sediment size
Future sea-level rise and wave climate change are projected to further increase the coastal erosion risk in Japan, where coastal erosion has already progressed due to rapid development after 1950s. Although there have been many studies on coastal erosion, the simplest one-dimensional equilibrium beach profile model is still used for long-term projection of future coastlines because of the difficulty in estimating coastal morphology change accurately. On the other hand, the risk may decrease if the heavy rainfall frequency increases because the heavy rainfall may increase the amount of sediment supply from rivers to the coasts. Knowledge of sediment supply from rivers to the coasts has not yet been sufficient, and further knowledge needs to be obtained.
In this presentation, existing studies on the characteristics of coastal morphology change and their models, as well as existing studies on sediment dynamics in rivers and sediment supply to the coast, which have been discussed separately, are introduced, the problems of the current coastal morphology change models are summarized, and future prospects are discussed.
In this presentation, existing studies on the characteristics of coastal morphology change and their models, as well as existing studies on sediment dynamics in rivers and sediment supply to the coast, which have been discussed separately, are introduced, the problems of the current coastal morphology change models are summarized, and future prospects are discussed.