Revetments are structures built along shorelines, riverbanks, or other areas to protect against erosion and wave action. They are typically made from materials like concrete, stone, or timber and serve to stabilize the land and prevent soil loss. Revetments can also help reduce the impact of flooding and storm surges. These structures are often used in coastal engineering and are designed to absorb and deflect the energy of waves. By doing so, revetments help maintain the integrity of beaches, dunes, and infrastructure such as roads and buildings located near water bodies.