Long-term beach erosion caused by changes in sediment transport is a big deal for beaches. When human activities like building harbors or urban development mess with the natural flow of sand along the coast, beaches can erode. A study in Mont-Roig Beach, Spain looked at how erosion affects the beach over time. They checked out the shape of the beach, what causes erosion, and how it impacts the area. By using measurements and computer models, they figured out how waves, sand movement, and sediment all play a role in beach erosion. The study suggests ways to help stop erosion and keep the beach healthy.