Associated with storm conditions. Backwash is stronger than swash, so material is removed
1 of 12
What are constructive waves?
Associated with high pressure systems. Swash is stronger than backwash, so material is deposited
2 of 12
What is weathering?
Weathering is the break down of material in-situ
3 of 12
Explain how different geology can affect the coast
Variation of hard and soft rock. Hard rock can form headlands. Soft rock can be eroded to form bays
4 of 12
Describe a reason for protecting the coastline
Social – nice place for people Economic – prevent flooding Environmental – protect natural habitat
5 of 12
Describe what longshore drift is
A zig-zag motion of material that moves down shore in the direction of the prevailing wind
6 of 12
Name and describe two types of erosion
Hydraulic Action – force of water that causes air to go into cracks. Attrition – pebbles hit each other and become smaller and rounder
7 of 12
Describe how cliff retreat occurs
Waves at the high tide mark attack the base of the cliff hydraulic action and abrasion wear away at the bottom of the cliff creating a wave cut notch. This eventually becomes large enough where the overhang collapses and the process repeats
Groynes trap sediment that would be carried by longshore drift Sea wall – made out of concrete or stone at the base of cliff which reflects wave energy.
11 of 12
Describe 2 types of soft engineering
Beach nourishment uses sediment to replace the lost sediment from longshore drift. Managed retreat – allowing the coastline to erode naturally
12 of 12
Other cards in this set
Card 2
Front
What are constructive waves?
Back
Associated with high pressure systems. Swash is stronger than backwash, so material is deposited
Card 3
Front
What is weathering?
Back
Card 4
Front
Explain how different geology can affect the coast
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