Unit 1C - Coastal Landscapes in the UK - Transportation and deposition

Question 1

Deposition definition?

Answer 1

Sea loses energy, dropping sediment it has been transporting

Question 2

Transportation definition?

Answer 2

Movement of material along coastline

Question 3

Four ways of transportation?

Answer 3

Traction, saltation, suspension and solution

Question 4

Explain process of traction?

Answer 4

Pebbles and larger sediment rolled along sea/river bed

Question 5

Explain process of solution?

Answer 5

Soluble materials dissolve in water and carried along

Question 6

Explain process of saltation?

Answer 6

Pebble-sized load bounced along sea/river bed by force of water

Question 7

Explain process of suspension?

Answer 7

Small particles carried in water, e.g. silts and clays, which can make the water look cloudy

Question 8

Name other way material is transported along coast and definition of this?

Answer 8

Longshore drift - prevailing wind direction causes waves to approach coast at angle with swash pushing material at same angle. Backwash then drags material down beach under gravity. Zig-zag movement. Repeat

Question 9

2 things that increase amount of material that’s deposited on an area of coast?

Answer 9

• there’s lots of erosion elsewhere on coast, so there’s lots of material available
• there’s lots of transportation of material into area

Question 10

Constructive wave characteristics? Height, frequency, swash and backwash strength

Answer 10

Low height and frequency, strong swash and weak backwash

Question 11

What is fetch?

Answer 11

Maximum distance of open water over which wind can blow. Longer fetch = a larger wave