Coastal Zone: Transportation And Depostion

Question 0

How is material transported along coasts?

Answer 0

Long shore drift

Question 1

What is transportation?

Answer 1

Movement of material

Question 2

Explain longshore drift.

Answer 2

• Waves follow direction of prevailing wind
• They hit the coast at an angle (any angle that isn’t a right angle)
• The swash carries material up the beach in the same direction as the waves.
• The backwash carries materials back down the beach at right angles towards the sea.

Question 3

What are the four processes of transportation?

Answer 3

• Traction
• Suspension
• Saltation
• Solution

Question 4

What is traction?

Answer 4

This is where large particles like holders are pushed along the seabed by the force of the water

Question 5

What is suspension?

Answer 5

Small particles like silk and clay are carried along in the water.

Question 6

What is saltation?

Answer 6

This is where pebble sized particles are bounced along the seabed by the force of water.

Question 7

What is solution?

Answer 7

Soluble materials dissolve in the water and carried along

Question 8

What is deposition?

Answer 8

This is the dropping of material.

Question 9

Why would the amount of material that’s deposited on a Coast increase?

Answer 9

Either:

• there lots of erosion somewhere else on the coast so there’s lots of material available
• lots of transportation of material to the area

Question 10

What’s a constructive wave?

Answer 10

Constructive waves deposit more material than they erode away.

Question 11

4 Characteristics of a constructive wave?

Answer 11

• Low frequency (6-8/ minute)
• Low and long
• Powerful swash and
• Weak backwash