Dredging

The practice of excavating or displacing the bottom or shoreline of a water body.

Glossary of Terms

The mean of all individual waves in an observation interval of approximately half an hour.

A tide that occurs at or near the time of new or full moon (syzygy) and which rises highest and falls lowest from the mean sea level.

Intertidal zone (often called littoral zone)

The part of the shoreline that is submerged at high tide and exposed at low tide.

Coastal Plain

The low-lying, gently-sloping area landward of the beach often containing fossil sands deposited during previously higher sea levels.

Scarp, beach

An almost vertical slope along the beach caused by erosion by wave action. It may vary in height from a few cm to a metre or so, depending on wave action and the nature and composition of the beach.

A steep slope, usually along the foreshore and/or at the vegetation line formed by wave attack.

Groyne

Narrow, roughly shore-normal structure built to reduce longshore currents, and/or to trap and retain littoral material. Most groins are of rock and extend from the backshore, well onto the foreshore and rarely even further offshore.

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Dredging