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EROSION
HOT SPOTS Areas where erosion
is occurring at a much higher rate than adjacent beach areas,
which can threaten beachfront development or infrastructure.
Typically the dry beach has narrowed considerably.
EROSION
WATCHSPOTS Areas where the
coastal environment (natural or built) will soon be threatened
if shore erosion trends continue.
EUSTATIC
SEA-LEVEL RISE World-wide changes
of sea level over decades to centuries caused by addition
of water from the melting of glacial ice and/or thermal expansion
of sea water due to global warming.
FETCH
Distance of open water over
which the wind blows in the development of waves. The fetch
length can restrict wave development so that only relatively
small waves occur in narrow bays
and lagoons.
FLOOD
CURRENT Tidal current moving
toward the shore, through a tidal inlet, or up a tidal river,
estuary, or lagoon.
FLOOD
TIDAL DELTA Sandy shoals formed
on a rising (flooding) tide and found on the estuarine or
lagoonward side of a tidal inlet.
FORESHORE
Seaward sloping portion of
the beach within the normal range of tides.
GEOTEXTILE
TUBES Elongated cloth bags
or tubes made out of plastic material that can be stacked
or arranged as a form of semi-hard coastal engineering.
GROINS
Shore protection structures
which extend from the beach backshore into the surf zone,
perpendicular to the shoreline. A groin is intended to build
up an eroded beach by trapping littoral drift or to retard
the erosion of a stretch of beach. Often mis-identified as
jetties.
HARDENING
See ARMORING
.
HARD
STABILIZATION Emplacement of
treated wood, rocks, concrete, PVC, and/or steel in the form
of breakwaters, bulkheads, groins, jetties, seawalls, etc.
HIGH
WATER LINE The line or “wetted
bound” separating wet from dry sand and formed by swash
uprush on the beach face.
HURRICANES
Tropical cyclones with winds
75 mph or greater which spiral inward toward a core of low
pressure and rotate in a counterclockwise direction in the
Northern Hemisphere.
INLET
See TIDAL
INLET.
ISOSTATIC
Local or regional changes in
the ground surface elevation, resulting in land subsidence
or uplift.
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