EM 1110-2-1100 (Change 1)
31 Jul 03
MINIMUM DURATION
See DURATION, MINIMUM.
MINIMUM FETCH
The least distance in which steady-state wave conditions will develop for a wind of given speed blowing a given
duration of time.
MIST
Water vapor suspended in the air in very small drops finer than rain, larger than fog.
MIXED CURRENT
Type of tidal current characterized by a conspicious velocity difference between the two floods or two ebbs usually
occurring each tidal day.
MIXED TIDE
A type of tide in which the presence of a diurnal wave is conspicuous by a large inequality in either the high or low
water heights, with two high waters and two low waters usually occurring each tidal day. In strictness, all tides are mixed, but
the name is usually applied without definite limits to the tide intermediate to those predominantly semidiurnal and those
predominantly diurnal. (See Figure II-5-16.)
MOLE
In coastal terminology, a massive land-connected, solid-fill structure of earth (generally revetted), masonry, or large
stone, which may serve as a breakwater or pier.
MONOCHROMATIC WAVES
A series of waves generated in a laboratory, each of which has the same length and period.
MONOLITHIC
Like a single stone or block. In coastal structures, the type of construction in which the structure's component parts
are bound together to act as one.
MORAINE
An accumulation of earth, stones, etc., deposited by a glacier, usually in the form of a mound, ridge or other
prominence on the terrain.
MORPHODYNAMICS
(1) The mutual interaction and adjustment of the seafloor topography and fluid dynamics involving the motion of
sediment. (2) The coupled suite of mutually interdependent hydrodynamic processes, seafloor morphologies, and sequences
of change.
MORPHOLOGICALLY AVERAGED
Single wave condition producing the same net longshore drift as a given proportion of the annual wave climate.
MORPHOLOGY
River/estuary/lake/seabed form and its change with time.
MOUTH
Entrance to an inland water body (e.g., river).
MUD
A fluid-to-plastic mixture of finely divided particles of solid material and water.
A-50
Appendix A Glossary of Coastal Terminology
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