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Glossary

Term Description
Accretion The process of sediment accumulating on the sea bed leading to a raising of bed levels
Acoustic provinces Areas of seabed with similar reflective properties for sound waves.
Advection The mixing of different water bodies by horizontal motion; mass transfer of matter
Aggradation Progressive increase in sedimentation (see also accretion).
Aggregates Sand, gravel and crushed rock suitable for use in the construction industry for mixing with a matrix to form concrete, macadam, mortar or plaster, or used alone as in railway ballast, unbound road-stone or graded fill.
Amphidromes Locations where tidal range is zero.
Amplitude Half of the peak-to-trough range (or height) of a waveform.
Antecedent Conditions defined by what went before (e.g. preceding geological epoch)
Anthropogenic Produced or caused by humans.
Armour stone Large quarried stone or specially shaped concrete block used as primary protection against wave action.
Armouring Protection of erodible materials by resistant materials.
Average Hsig Average significant wave height recorded during a storm event (see significant wave height).

Glossary index

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Last Modified on: 19 June 2011
Printed from the Estuary Guide on 26/08/2019 03:32:06