Desertification Flashcards Preview

A-Level Geography - Water Cycle > Desertification > Flashcards

Flashcards in Desertification Deck (11):
1

decertification definition

the process of turning into a dessert (sahel)

2

human causes of desertification

overgrazing
over cultivation
deforestation
population growth
toyotarisation

3

causes
overgrazing

too much livestock
all vegetation is eaten
ground susceptible to wind and water erosion

4

causes
overcultivation

farming too intensively
no fallow periods
all nutrients lost

5

causes
deforestation

land receives less nutrients
vulnerable to erosion as there is no interception
less stability because tree roots have been removed

6

causes
population growth

more food production
more pressure on the land

7

physics caused of desertification

rising temps
falling rainfall
flash floods
wind

8

causes
rising temps

global temperatures increase
plants are harder to grow
reduces vegetation cover

9

causes
falling rainfall

increasingly hard for vegetation to grow
ground more vulnerable to wind erosion

10

causes flash floods

intense periods of rainfall erode topsoil

11

causes
wind

wind erosion increases