1.c. Coastal sediment is supplied from a variety of sources.

Question 1

The various sources of coastal sediment:
- terrestrial, including fluvial deposition, weathering and mass movement, marine erosion, aeolian deposition and longshore drift

Answer 1

Fluvial deposition-
where the river meets the sea -> water looses energy -> sediment is deposited

Weathering-
the wearing away and break down of rock IN SITU (stays in the same place)

Mass movement-
the movement of material DOWN A SLOPE UNDER GRAVITY -> fallen material adds to sediment

Marine erosion-
-> the wearing away and removal of sediment by waves

Aeolian deposition-
-> winds transport and deposit sediment along the coastline -> depending on if its onshore or offshore winds

Longshore drift-
-> waves transport sediment along the coastline in the direction of the prevailing winds -> some places loose sediment and some places gain it (within a sediment cell)

Question 2

The various sources of coastal sediment:
- offshore, including marine deposition

Answer 2

Marine deposition-
Waves transport sediment from the sea bed -> and deposit in onto the beach

Question 3

The various sources of coastal sediment:
- human, including beach nourishment.

Answer 3

Beach nourishment-
they add sand onto the beach