Coasts Details

Question 1

Features of constructive waves

Answer 1

-Long wavelength
-Weak backwash
-Strong swash
-Low, shallow gradient waves
-Lower frequency of waves

Question 2

Features of destructive waves

Answer 2

-Short wavelength
-Strong backwash
-Weak swash
-Tall, steep gradient waves
-Higher frequency of waves

Question 3

Factors which affect the amount/speed of coastal erosion

Answer 3

-The type of rocks that form the cliff
-The strength of the waves
-The shape of the coastline
-How sheltered or exposed to waves the coastline is

Question 4

Conditions that coral needs for growth

Answer 4

-Warm water(between 23° and 25° is best)
-Clear, shallow saltwater(no deeper than 50 metres)
-Plenty of sunlight(to aid photosynthesis)

Question 5

Hard engineering techniques to manage the coast

Answer 5

-Sea walls
-Groynes
-Rock armour
-Revetments
-Gabions
-Offshore breakers

Question 6

Soft engineering techniques to manage the coast

Answer 6

-Beach nourishment
-Managed retreat