Desertification Flashcards
decertification definition
the process of turning into a dessert (sahel)
human causes of desertification
overgrazing over cultivation deforestation population growth toyotarisation
causes
overgrazing
too much livestock
all vegetation is eaten
ground susceptible to wind and water erosion
causes
overcultivation
farming too intensively
no fallow periods
all nutrients lost
causes
deforestation
land receives less nutrients
vulnerable to erosion as there is no interception
less stability because tree roots have been removed
causes
population growth
more food production
more pressure on the land
physics caused of desertification
rising temps
falling rainfall
flash floods
wind
causes
rising temps
global temperatures increase
plants are harder to grow
reduces vegetation cover
causes
falling rainfall
increasingly hard for vegetation to grow
ground more vulnerable to wind erosion
causes flash floods
intense periods of rainfall erode topsoil
causes
wind
wind erosion increases