Deposition

Question 1

Overview

Answer 1

Takes place in low energy environments and is the laying down of solid material such as sand and silt

Question 2

Importance

Answer 2

Important in the sediment cell

Areas of deposition, beaches, spits, mudflats are all sediment stores/sinks

Question 3

Aeolian deposition

Answer 3

refers to transport and deposition of sediment by wind

Wind plays an important part in shaping the coastline

Question 4

Sand

Answer 4

Most significant in terms of depositional features at the coast

Eg when swash is more dominant than the backwash the sand dries out and can be blown by the wind to form sand dunes

Question 5

Factors when deposition occurs

Answer 5

Deposition takes place when velocity of water falls below critical value and particle can no longer be transported, energy flows may decrease due to:

Energy source altering- current weakens and prevailing wind becomes weaker in strength

Discontinuity in flow- turbulence between opposing currents can result in deposition

Increased friction- more energy required to overcome friction with seabed less can be transported, +++ deposition

Increased load- sudden discharge of material from a river or landslip some material deposited