Coastal Erosion -Hydraulic action: The waves trap and compress air in cracks and holes in a cliff-Corrasion: Large waves hurling beach material against the cliff-Attrition: When waves cause rocks and pebbles on the beach to bump into each other and to break down in size-Corrosion: Cliff is slowly dissolved by acids in the sea-water

-Is the most widespread coastal deposition feature

-The natural rate of cliff erosion can be accelerated by human activity. There are

arguments for and against trying to protect cliffs from erosion.

-Occurs when the level of the sea rises rapidly to a height well above

that which was predicted.

1-Land behind the coastline is flat and low-lying2-Severe storms can cause exceptionally high waves and create storm surges3-Very high tides can flood areas that are not protected either naturally (by sand dunes) or artificially (by sea-walls)4-Global warming is causing sea-level to rise, so increasing the flood risk in many low-lying coastal areas around the world

Precautions in Coastal

Flooding