Rivers And The Sea

Question 1

Meanders

Answer 1

Always change shape and position. Water is pushed to the outer bend causing erosion of the bend. Inside bend get built up through deposition

Question 2

Hard engineering

Answer 2

Stop erosion

Question 3

Soft engineering

Answer 3

Work with nature to protect the coast

Question 4

Sea walls

Answer 4

Sea walls stop the waves from reaching the land. They reflect the waves back to the sea but this can wash away he beach. They give good protection but are expensive. £7 per Km

Question 5

Groynes

Answer 5

These are built down the beach and into the sea about 20m apart. They slow down movement of material along the coast and help to build up the beach.

Question 6

Gabions

Answer 6

Steel wire mesh filled with boulders used in costal defences

Question 7

Spit formation

Answer 7

A special type of beach extending into the sea. Often grows out across a bay or river

Question 8

Why do we use erosion strategies

Answer 8

To stop beaches from disappearing