Changing Coastlines

Changing Coastlines

What is longshore drift?

What is long shore drift?

• The slow shifting of sand and pebbles along a beach.

• It happens when waves move towards the shore at an angle.

• The prevailing wind is the main factor that causes this process.

• The prevailing wind moves the waves in the same direction.

In this process the waves pick up particles of sand and pebbles.

Then they move the particles up the beach, knowns as SWASH.

After that the sand and pebbles are rolled back down the beach as backwash.

Multiple Choice

What is longshore drift?

• When a beach is really long and people sleep on it.

• A pebble drifting slowly into the sea.

• The movement of sediment down the beach.

Multiple Choice

What is swash?

• The movement of a wave sideways.

• Waves pushing material forwards onto the shore.

• Waves pulling material backwards into the sea.

Multiple Select

What is backwash?

• Waves pulling material backwards into the sea.

• Waves pushing material forwards onto the shore.

• Waves moving up.