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Glossary

Term Description
m Metre.
m3 Cubic metres.
Macrophyte A member of the macroscopic plant life, especially of a water body.
Macroscopic Large enough to be observed by the naked eye.
Macro-tidal An area with a high tidal range.
Magaripple Underwater sand dunes with a wavelength (spacing) of 3-30 m.
Maintenance dredging Dredging concerned with the preservation of navigational channels and berths.
Mean range of tide (Mn) The difference in height between mean high water and mean low water.
Meteorological tides Tidal constituents having their origin in the daily or seasonal variations in weather conditions which may occur with some degree of periodicity.
mgl-1 Milligrams of substance (dry weight) per litre of water.
MHW Mean High Water
MHWM Mean High Water Mark
MHWN Mean High Water Neaps
MHWS Mean High Water Springs
MHWST Mean High Water Spring Tide
MLR Mean Tidal Range
MLW Mean low water
MLW Mean low water
MLWM Mean Low Water Mark
MLWN Mean Low Water Neaps
MLWS Mean Low Water Springs
mm Millimetres 1,000 mm = 1 m.
Modelling A representation of a real system in terms of the structural organisation and functioning. Numerical models are a specific type of model where the components are capable of being represented mathematically
Morphology The structure and form of the land.
MSL Mean Sea Level
Mudflats Expanses of mud which are periodically exposed at low tide often found adjacent to saltmarshes.

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Last Modified on: 19 June 2011
Printed from the Estuary Guide on 26/08/2019 03:43:28