Explain how different landforms may be created by the transport and deposition of sediment along the coast

Long Shore Drift is responsible for the creation of the majority of coastal sedimentary landforms. Eroded material, ranging in size from fine sand to larger pebbles and cobbles, are transported in three ways: Traction, Saltation and Suspension. Material is carried along the shore in a zigzag fashion by waves swashing up the beach and backwashing back down at a right angle. The angle of movement along the beach is determined primarily by the wind direction, as well as the dominant currents present in the locality.This movement of sediment results in depository landforms at areas of lower energy such as bays and confluences of bodies of water (e.g the mouth of a river). Beaches are areas of sand, pebbles and shingle deposited as a result of the low energy of the waves acting on the shore, often in bays. Constructive waves form steeper beaches as a result of the dominant swash and weak backwash, depositing sediment rapidly. Destructive waves form more gently sloping beaches as a result of their stronger backwash and weaker swash. Spits are banks of shingle and sand jutting out into the sea, connected to the shore. Sediment carried by longshore drift is deposited when, due to a change in shape or the coast or the confluence of two bodies of water, there is a steep decline in wave energy. Largest material is deposited first, as the waves dont possess enough energy to carry the heavier load. Bars occur when a spit joins two headlands, trapping a shallow lake behind it called a Lagoon.

Answered by Harry W. Geography tutor

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