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Glossary

Term Description
Capital Dredging The 'first time' creation of new channels or berths as part of a capital programme.
CD Chart Datum
CHaMP Coastal Habitat Management Plan
Chart Datum (CD) The level to which both tidal levels and water depths are reduced - on most UK charts, this level is that of the lowest low tide (LAT). For example, in Southampton CD is 2.74 m below Ordnance Datum Newlyn (ODN).
Clasts Fragmental mineral or rock material (forming sediment).
Clay A fine-grained, plastic, sediment with a typical grain size less than 0.004 mm. Possesses electromagnetic properties that bind the grains together to give a bulk strength or cohesion.
Coastal defence General term used to encompass both coast protection against erosion and sea defence against flooding.
Coastal processes Collective term covering the action of natural forces on the shoreline and nearshore seabed.
Coastal zone Some combination of land and sea area.
Cobble A rounded rock on a beach, with diameter ranging from about 75 to 250 mm (see also boulder, gravel and shingle).
Cohesive sediment Sediment containing significant proportion of clays, the electromagnetic properties of which cause the sediment to bind together giving a bulk strength (see clay).
Concentration The quantifiable amount of a substance in the surrounding air, water, food or sediment.
Consolidation The compacting of sediment/strata of material, as a result of pressure after deposition.
Constituent One of the harmonic elements in a mathematical expression for the tide-producing force and in corresponding formulas for the tide or tidal current. Each constituent represents a variation in the relative positions of the Earth, Moon, and Sun.
Core A cylindrical sample extracted from a beach or seabed to investigate the types and depths of sediment layers.

A inner, often much less permeable, portion of a breakwater or barrier beach.
Correlation Coefficient Measurement (between -1 and 1) of the quality of fit of a line through a set of data points. The closer the number to +-1.0 the better the fit.
Crest Highest point on a beach face, breakwater or seawall.
Cross-shore Perpendicular to the shoreline.
Current Flow of water.
CW Coastal Waters
CWS County Wildlife Sites

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Last Modified on: 19 June 2011
Printed from the Estuary Guide on 26/08/2019 04:25:04