CZMU Newsletter for Q1 2022

The CZMU newsletter for Q1 2022 is now available for your reading pleasure. Please click here to view the document.

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Glossary of Terms

Tetrapod

Concrete armor unit with four stubby legs, used on breakwaters and seawalls to dissipate wave energy.

Global Positioning System (GPS)

A navigational and positioning system developed by the U.S. Department of Defense, by which the location of a position on or above the Earth can be determined by a special receiver at that point interpreting signals received simultaneously from several of a constellation of special satellites.

Setback

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

Mean High Water (MHW)

The average height of the high water over a 19-year period. For shorter periods of observations, corrections are applied to eliminate known variations and reduce the results to the equivalent of a mean 19-year value. All high water heights are included in the average where the type of tide is either semi-diurnal or mixed.

Ridge and runnel

Beach topography consisting of sand bars that have welded to the shore during the recovery stage after a storm. At low tide, water ponds in the runnels and flows seaward through gaps in the ridge.

Swash Zone

The zone of wave action on the beach, which moves as water levels vary, extending from the limit of run-down to the limit of run-up.

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CZMU Newsletter for Q1 2022