0 the movement of sand and small stones, etc. along the coast by waves travelling parallel or at an angle to the coast --
The sediment provided is not adequate to nourish the coast against its typical high energy waves and strong longshore drift.
In the ocean, groynes create beaches, or prevent them being washed away by longshore drift.
Sediment is transported along the coast in the direction of the prevailing current (longshore drift).
Trained entrances can provide better navigation, water quality and flood mitigation services, but can also cause beach erosion due to their interruption of longshore drift.
There are three artificial groynes had been placed at northern part of the sandspit, to accumulate sediment from longshore drift.
Where longshore drift occurs in opposite directions, two spits merge into a triangular protrusion along a coastline or lakeshore.
This often occurs in the opposite direction to longshore drift.
The terminal groyne prevents longshore drift from bringing material to other nearby places.
