Sediment transport

Question 1

What is swash direction?

Answer 1

Wind
angle prevailing wind direction
Waves are controlled by wind
moves up beach

Question 2

What is backwash direction?

Answer 2

Gravity acts on it

Falls back onto sea at 90

Question 3

How are spits created?

Answer 3

coast changes direction at an estuary
LD continues to move sediment across the inlet
river doesn’t let spit completely join to the coast on the other side river has energy to move sediment

Question 4

What is a bar?

Answer 4

formed when a spit grows across a bay

lagoons often form behind bars

Question 5

What are beaches?

Answer 5

made from constructive waves- move depositing sand or shingle in land
more gently sloping beaches tends to be formed from sand, steeper sloping beach is formed from pebbles

Question 6

What are tombolo’s?

Answer 6

spit that stretches across mainland and joins offshore islands, causes a formation of a tombolo

Question 7

What are cuspate forelands?

Answer 7

forms when sediment deposited across a bay- caused by LSD trapping of sediment until new land is formed