riprap

noun

Meaning

A layer of large stones or concrete blocks placed on the bed or banks of a river or canal, or on the shore of a lake or sea, to prevent erosion by water.

Examples

  • The engineers laid down a thick layer of riprap to protect the dam from floodwaters.
  • We walked along the path, which was covered in loose riprap that crunched under our feet.

Synonyms: armoring, ballast, protection