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Glossary of Terms

A tropical cyclone with maximum winds less than 34 m/sec (75 mile per hour). Compare with hurricane or typhoon (winds greater than 34m/sec).

Seawall

A structure, often concrete or stone, built along a portion of a coast to prevent erosion and other damage by wave action. Often it retains earth against its shoreward face.

A structure separating land and water areas to alleviate the risk of flooding by the sea. Generally shore-parallel, although some reclamation seawalls may include lenghts that are nromal or oblique to the (original) shoreline.
A vertical or near-vertical type of shoreline armouring characterised by a smooth surface.

Eutrophication

Increased primary production caused by the anthropogenic enrichment of a water body with nutrients. (See also primary production and nutrients ).

Survey, topographic

A survey which has, for its major purpose, the determination of the configuration (relief) of the surface of the land and the location of natural and artificial objects thereon.

Dune

A landform characterized by an accumulation of wind-blown sand, often vegetated.

Rubble-mound Structure

A mound of random-shaped and random-placed stones protected with a cover layer of selected stones or specially shaped concrete armour units. (Armour units in a primary cover layer may be placed in an orderly manner or dumped at random.)

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