Wave-dissipating concrete block

A wave-dissipating concrete block is a naturally or manually interlocking concrete structure designed and employed to minimize the effects of wave action upon shores and shoreline structures, such as quays and jettys.

Tetrapods used to protect a seawall
Large interlocked Xblocs (8.0 m3 or 280 cu ft) in a trial placement

Examples include such proprietary designs as the Tetrapod, Accropode, Xbloc, KOLOS, and Dolos.

See also
  • Artificial reef – Human-made underwater structure that functions as a reef
  • Breakwater (structure) – Structure constructed on coasts as part of coastal management or to protect an anchorage
  • Coastal management – Preventing flooding and erosion of shorelines
  • Coastal erosion – Displacement of land along the coastline
  • Ocean surface wave – Surface waves generated by wind on open water
  • Riprap – Rock or concrete protective armour
  • Seawall – Form of coastal defence
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