M
Macro PolicyMacro Policy is policy, which affects the whole country. It is concerned with monetary, fiscal, trade and exchange rate conditions as well as with economic growth, inflation and national employment levels. It is distinct from micro policy, which only affects particular sectors, districts, neighborhoods or groups.
MangrovesAny of the many genera of trees that are capable of living and growing in salt water or salty soils; often includes the rich biological community that is supported by the mangrove forests or fringing strips of mangrove.
Mariculture The cultivation of
marine plants and animals in their natural environment
MarinaA sheltered area of the coast, usually a
harbour, where small, privately-owned boats and yachts are kept.
MarinaA water dependent facility, the main function of which is to provide boat dockage and related services for recreational vessels as a commercial enterprise or in association with a private club. Marina facilities are often operated in conjunction with boatyard facilities.
Marsh: Area of soft, wet, or periodically inundated land, generally treeless, and usually characterized by grasses and other low growth.
Marker, survey An object placed at the site of a station to identify the surveyed
location of that station
Marker,reference A mark of permanent
character close to a survey station, to which it is related by an accurately
measured distance and azimuth (or bearing).
MarshAn area of soft, wet or periodically inundated land, generally treeless and usually characterized by grasses and other low growth.
Master planThe operational CZM plan which defines rules, resources, conservation issues, performance standards, authorities, objectives, use rights (permitted uses), development restrictions, participation, coordination mechanisms, permit/EIA conditions, protected areas, setbacks, staff, training, etc.
MatrixAn organizational structure that uses functional supervisors as well as project
Mean High Water MHW LineA tidal datum; the arithmetic mean of the high water heights observed over a specific 19-year Metonic cycle (the National Tidal Datum Epoch). Proposed work and structures seaward of the mean high water line are subject to Federal regulatory authorities carried out by the U.S. Army Corps of Engineers and to State and local regulatory authorities as well. In general, most land and water areas seaward of the mean high water line are subject to the Public Trust Doctrine. The mean high water line also marks the seaward boundary of the jurisdiction of a municipality's planning and zoning authorities.
Mean Low Water MLW LineA tidal datum; the arithmetic mean of the low water heights observed over a specific 19-year Metonic cycle (the National Tidal Datum Epoch).
Mean sea levelThe average height of the sea; a datum, or “plane of zero elevation”, established by averaging hourly tidal elevations over a 19 year tidal cycle or “epoch” and corrected for curvature of the earth which is the standard reference for elevations on the earth’s surface.
Measure of exposureA measure of stressor existence and movement in the environment and its contact or co-occurrence with the assessment endpoint.
Measurement endpointSee “measure of effect.”
Micro PolicyMicro Policy is policy, which only affects particular sectors, districts, communities, villages, neighborhoods or groups. It is distinct from macro policy, which affects the whole country.
MitigationMeasures undertaken to limit the adverse impact of natural hazards, environmental degradation and technological hazards.
MitigationThe elimination, reduction or control of the adverse environmental impacts of a project, including countermeasures against negative environmental impacts of development.
Mixing zoneA limited water area surrounding a point of pollution discharge where the restriction on amount of contaminants is waived to allow dilution to take place before the contaminant reaches the water body at large.
ModelingAn investigative technique using a mathematical or physical representation of a system or theory, often to test the effect of changes of system components on the overall performance of the system, and often applied to address water quality and shoreline change questions.
Mud flatAn area of fine silt usually exposed at low tide but covered at high tide,
MudflatAn area of mud dropped (deposited) by the
sea. You can often see it at low tide as a flat sheet of mud.
Multiple useThe concept of providing for multiple activities for particular areas or resources by managing them for sustainable resource use.