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Glossary

Glossary of Terms

Setback

A required open space, specified in shoreline master programmes, measured horizontally upland from a perpendicular to the ordinary high water mark.

Reference Zone

In regard to beach measuring procedure, the part of the foreshore subject to wave action (between the limit of uprush and the limit of backwash) at mid-tide stage.

Backshore

The generally dry portion of the beach between the berm crest and the vegetation line that is submerged only during very high sea levels and eroded only during moderate to strong wave events.

Beach Narrowing

A decrease in the useable beach width caused by erosion.

Oceanic Gyre

A very large, more or less circular, pattern of water circulation in an open ocean basin.

Profile, beach

The intersection of the ground surface with a vertical plane; typically perpendicular to the local shoreline, and may extend from behind the dune line or the top of a bluff to well seaward of the breaker zone.

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