2.10 - W Africa Flashcards
1
Q
How much erosion has West Africa seen in 40 years?
A
700m
ESP. In NW Guinea-Bissau
2
Q
How much has the sea level risen since 1950 in West Africa?
A
10cm
3
Q
What are the main economic activities along the West African coast?
A
Fishing
Tourism
Commerce
4
Q
What are the issues with sand extraction from beaches (for housing) ?
A
- leaves less material for LSD
- parts of beach starved of sediment
- beaches are smaller, cliffs are more susceptible to being eroded
5
Q
What are the issues with groynes?
A
- Terminal Groyne syndrome
- parts of beach further down are starved of sediment
6
Q
What are the issues with dredging (for material used on beaches and ports)?
A
- removes material offshore
- means wave energy is retained due to deeper water
- increased erosion
7
Q
Why is West Africa dependant on its coastline?
A
- 50% of population lives there
- fishing + tourism
8
Q
What is the projected SLR by 2100?
A
1m
