Amazon water cycle case study Flashcards
1
Q
what is the average rainfall
A
2,300km ,however half never reaches the ground
2
Q
how much rainfall reaches the sea
A
only 30%
3
Q
why is precipitation so high
A
due to humidity and unstable weather conditions
4
Q
how much evporates
A
25%
5
Q
why is deforestation happening?
A
- tropical rainforests are cleared to provide land for faming, mining
- most common method is burning
- cattle ranches
- hydroelectric power
- dams
6
Q
what are the impacts
A
- when forests replaced, evapotranspiration is reduced, leading to reduced atmospheric humitidy, supressing precipation
- few trees encourages overland flow
- few trees mean less interception
- rates on run-off increase
