Revetments are structures built along shorelines, riverbanks, or other areas to protect against erosion and wave action. They are typically made from materials like stone, concrete, or vegetation, and serve to stabilize the land and prevent soil loss. Revetments can be found in various environments, including coastal regions and along rivers. These structures work by absorbing and deflecting the energy of waves or flowing water, reducing their impact on the land. Revetments can also enhance the habitat for local wildlife and contribute to the overall health of ecosystems in areas like estuaries and wetlands.