The Sea Flashcards
Constructive waves
When the swash is greater than the backwash
Deposition
Destructive waves
When the backwash is greater than the swash
Erosin
Hydraulic action
The physical force of the waves breaks material off the coastline
During storm, waves r stronger nd their ability to erode increases
Abrasion
Loose material is thrown against the coastline by the waves
Breaks more material off the coastline
Comprehension
Waves crash again cliff, air gets trapped and becomes compressed. Waves retreat and pressure is released. This continues until rock shatters
Solution
Some rocks such as limestone and chalk are dissolved by water
Attrition
Stones in the water are hitting off each other. They become worn down, smooth and rounded
Bay
A curved area where the waves have eroded the coastline
Example: Dublin bay
Headline
An area of hard Rock jutting into the sea.
Example: bray head
Sea cliff
a vertical or steep slope on the coastline
Eg: cliffs of moher in co. Clare
Sea cave
A tunnel at the base of a cliff
Eg: caves at ballybunion in co.kerry
Sea arch
An arched shaped tunnel that stretches through a headland
Eg: dùn briste off Downpatrick head in co.mayo
Learn in detail
Blowhole
A passage that links the cliff top with the roof of a sea cave
Eg: the two pistols on the co.donegal coast
Features of coastel deposition
Beach
Sand dunes
Sand spit
Sand bar
Tomboala
Process of coastel erosin
Hydraulic action
Abrasion
Compression
Solution
Attrition
Coastel deposition
Waves deposit their load when they lose energy and can no longer transport such a large load
Lagoon
A small lake that is formed behind the sand bar
Tombolo
A narrow ridge of sand that joins an offshore island to the mainland
Gyrones
Low walls often made of wood that are built at right angles to the coast
Eg. Roslare Co. Wexford
Sea walls
A wall made of concrete built between the sea and the coastel town
Eg: galway bay
Gabions
Wire cages that are filled with small stones placed along beaches
Eg: lahinch, co.clare
Rock armour
Large boulders placed at the base of soft Rock areas of the coastline
Eg: lahinch Co. Clare
Case study
Rosslare strand and rosslare Harbour co. Wexford
Location of case study
The southeast coast
Serves as a major port and ferry terminal
Coastel vulnerability of case study
Exsposed to the irish sea, making i5 susceptible to eroisin and storm surges
Protective measures of case study
Installation of coastel defences
Nourishment projects to help eroded beaches
Features of coastel eroisin
Headland
Sea cliff. Blowholes. Bays
Sea cave
Sea arch
Sea stack
