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Longshore currents have deposited beach ridges since the for 6,000 years.
Such waves pile water up and initiate longshore currents.
Longshore currents flow parallel to the beaches, making waves break obliquely on the sand.
Longshore currents also commonly create offshore bars, which give beaches some stability by reducing erosion.
When waves meet a shore at an angle a longshore current is created as water is pushed along parallel to the coastline.
These convergences will thus provide the sites for the divergent longshore currents required to initiate the cell circulation pattern.
It may have been swept southward by longshore currents from an eroding sandstone terrain in Canada.
Longshore currents can generate oblique breaking waves which result in longshore transport.
This coastline is characterised by its mixed sand and gravel beaches and southerly longshore currents.
Longshore drifting is complemented by longshore currents, which transport sediment through the water alongside the beach.
But the sand keeps flowing, carried not only by waves but also by a longshore current of sorts called a littoral drift.
Littoral cells usually develop on coast which are not impeded by headlands and where longshore currents are allowed to develop.
This is especially common in arid regions, where there is little transport of sediment by rivers or redistribution by longshore currents.
Strand plains typically are created by the redistribution by waves and longshore currents of coarse sediment on either side of a river mouth.
Where the direction of the shore inland re-enters, or changes direction, such as at a headland, the longshore current spreads out or dissipates.
Rivers, waves, and longshore currents segregate mud, silt, and clay from sand and gravel due to fall velocity.
The occurrence of oblique waves introduces a distortion into the simple cellular pattern, one longshore current being much stronger than the other where a pair converge to form the rip.
This results in a gentle down-wave drift of water, which can lead to the accumulation of water along the coast and so help to generate rip and longshore currents.
In places of re-entrance along a coastline (such as inlets, coves, rias, and bays), sediments carried by a longshore current will fall out where the current dissipates, forming a spit.
The east coast and south-east of the North Sea (Wadden Sea) have coastlines that are mainly sandy and straight owing to longshore currents, particularly along Belgium and Denmark.
Thus it seems likely that in the general process of longshore drift under the action of oblique waves, longshore currents and oblique rip currents may help in the movement of the finer material.
On intermediate states with pronounced bar-trough (straight or crescentic) topographies, incident wave orbital velocities are generally dominant but significant roles are also played by subharmonic and infragravity standing waves, longshore currents, and rips.
Once a current is developed and the head of water is lowered a hydraulic gradient is developed along the beach and a circulation pattern develops of longshore currents feeding seaward rip currents (Fig. 8.3).
In contrast the Canterbury Bight has a combination of high energy environments and strong southern longshore currents that transport large amounts of sediment north, which can be classified as a sink, putting a deficit to the coasts sedimentary budget.
Cape Fear is formed by the intersection of two sweeping arcs of shifting, low-lying beach, the result of longshore currents which also form the treacherous, shifting Frying Pan Shoals, part of the Graveyard of the Atlantic.
It also plays a large part in longshore drift as well.
Longshore drift always moves in the direction of the main wind.
With a longshore drift equilibrium was reached within a new state.
Delta plans may also be distorted by strong longshore drift.
Longshore drift however is the most accepted hypothesis for creation.
Longshore drift, along with wave energy, has shaped the shore.
Longshore drift is dominantly to the north along the shore.
The process of the waves moving the sand along the shore is known as longshore drift.
There are, however, many inexpensive and effective ways of controlling longshore drift.
The longshore drift is affected by wind direction, though.
The inlet has evolved over the years due to natural processes, especially longshore drift.
These formulas all provide a different view into the processes that generate longshore drift.
Most revetments do not significantly interfere with transport of longshore drift.
This sediment then enters the coastal system and is transported by longshore drift.
A fourth element of the environment in which hapua form is the strong longshore drift component.
The small island was made from the same longshore drift that created Napatree Point.
In the ocean, groynes create beaches, or avoid having them washed away by longshore drift.
Sediment is transported along the coast in the direction of the prevailing current (longshore drift).
The peninsula is partially made from longshore drift.
The terminal groyne prevents longshore drift from bringing material to other nearby places.
Longshore drift may also drag Emerita laterally along a beach.
It is gradually extending westwards due to wave action and longshore drift.
Sediment sources can include river transport, sea cliff erosion and longshore drift into an area.
A baymouth bar is a depositional feature as a result of longshore drift.
Longshore drift can generally be defined in terms of the systems within the surf zone as seen in figure 1.