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Glossary

Glossary of Terms

Offshore

The portion of the littoral system that is always submerged.

Permeable Groyne

A groyne with openings or voids large enough to permit passage of appreciable quantities of littoral drift through the structure.

Continental Shelf

The zone bordering a continent extending from the line of permanent immersion to the depth, usually about 100 m to 200 m, where there is a marked or rather steep descent toward the great depths of the ocean.

The region of the oceanic bottom that extends outward from the shoreline, with an average slope of less than 1:100, to a line where the gradient begins to exceed 1:40 (the continental slope).

Station, control

A point on the ground whose horizontal or vertical location is used as a basis for obtaining locations of other points.

Active Beach

The portion of the littoral system that is frequently (daily or at least seasonally) subject to transport by wind, waves, and currents.

Tropical Storm

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).

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