Coastal sediment transport is the academic field investigating the processes, forces, and pathways governing the movement of unconsolidated particulate material, such as sand, gravel, and mud, within the dynamic coastal zone stretching from the nearshore seafloor to the dune systems. This research area analyzes the interactions between sediment and driving forces like waves, currents, and tides to understand coastal morphology evolution, predict shoreline changes, and inform coastal engineering and management strategies.