long, narrow, sandy accumulation site separated from the mainland by water
sand deposited by longshore transport at one end of an island (recurved)
topography of the seafloor
the zone of sediment transport and accumulation of unconsolidated material; extends from the Mean High Water to a 29' water depth=the zone of sand movement
intersection of the ground surface with a vertical plane; shape of beach
deposit of sand seaward of tidal inlet, formed from sand carried seaward
wearing away of land by natural forces (waves, wind, flowing water, etc)
rate at which the ocean side of the barrier island or beach is moving landward; the average value is 3' in NC but min. for considering setback is 2'
semi-enclosed body of water where river water mixes with ocean water
Eustatic Sea Level
worldwide changes in sea level (glaciers, melting, etc); last cent. the sea level rose 8-10"
deposit of sand landward of tidal inlet formed when sand is carried into the inlet
low, narrow, hardened, jetty-like feature perpendicular to the shoreline that is designed to trap sand and is not located at the inlet; NOT allowed in NC except for the grandfathered ones
short, narrow waterway between islands; important for exchange of water, sediment, and nutrients
land area alternately inundated and uncovered by tides (MeanLow to MeanHighWater)
structure at an inlet, almost perpendicular to shore, to protect inlet for navigation purposes; navigation structure solely designed to control channel shoaling, position, and alignment.
movement of sediment along the shoreline due to waves and currents generated by wind; dominantly from N to S on the E coast; varies depending on wind directions and storms
shape of an island or land feature
ex. Masonboro "protrudes" at the inlets due to the activity of the ebb tide deltas and is concave landward in the middle of the island
process of replenishing a beach with sand, usually from dredging and pumping sand into the beach
Overwash or Washover fan
material that is transported from the beach across the island during storms; sand/shells are deposited on the back said of the island leading to the island migrating landward-this is termed island ROLLOVER; the overwash is fan shaped
Relative Sea Level
local changes in sea level as a result of local subsidence, delta building or movement, tectonic movements, and/or isostatic adjustment with glacier advance or retreat
movement of the beach/barrier island landward by overwash; natural process that occurs with seal level rise, subsiding coasts, and with storms
allowed for the "temporary" protection of the beachfront prop in NC
coast parallel hard structure connected to shoreline to protect shore from waves; banned in NC except for those grandfathered in or for the protection of significant structures (FORT FISHER)
distance required for structures to be "set-back" or to be placed landward of the primary dune line; 30x the erosion rate for all structures less than 5,000 sq ft, 5,000 to 10,000 is 60x ER; in ALL cases, the min erosion rate is considered to be 2 ft/yr
relatively new term for a low-slung structure at the ends of islands to catch sand; a protection device for selected ares; there are 2 IN NC (FORT MACON AND PEA ISLAND); shore protection structure which can provide some navigation benefits.
difference in height between consecutive high and low tides; tidal range in SE NC is 3.8' with the spring tide having a 4.5' range
coastal area management act
coastal resources commissions; makes sure they enforce CAMA's acts
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