A revetment is a passive structure, which protects against erosion caused by wave action, storm surge and currents. The main difference in the function of a seawall and a revetment is that a seawall protects against erosion and flooding, whereas a revetment only protects against erosion.

What are the advantages of revetments?

Rock Revetment Advantages & Disadvantages

Absorb wave energy. Effective for generations. Protects the Great Lakes' sand-bars and beaches from long-term damage. Assures natural beaches will re-form when water levels drop again.

How revetments protect the coast?

A seawall or a revetment is a structure made of concrete, masonry or sheet piles, built parallel to the shore at the transition between the beach and the mainland or dune, to protect the inland area against wave action and prevent coastal erosion. Seawalls are usually massive structures designed to resist storm surges.