Human Interference in the Sahel (Leaving Cert Geography): Flashcards
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Population depending on Sahel's natural resources
Population depending on Sahel's natural resources
100 million people
3 main types of human interference in Sahel
3 main types of human interference in Sahel
Poor agriculture, climate change, deforestation
% of Sahel's GDP from agriculture
% of Sahel's GDP from agriculture
45%
People at risk of starvation in Sahel
People at risk of starvation in Sahel
10-20 million people
Cash crops definition
Cash crops definition
Crops grown for sale/profit, not own consumption
Sedentary farming definition
Sedentary farming definition
Keeping animals in fixed locations rather than moving them
Capillary action definition
Capillary action definition
Water drawn up from underground, bringing salts to surface
Fallow land meaning
Fallow land meaning
Land left unused to recover nutrients
Monoculture definition
Monoculture definition
Growing only one type of crop
Rainfall decrease in Sahel over 25 years
Rainfall decrease in Sahel over 25 years
30% (from 720mm to 440mm annually)
% of Sahel soils experiencing degradation
% of Sahel soils experiencing degradation
Over 80%
Rate Sahara Desert advances into Sahel per year
Rate Sahara Desert advances into Sahel per year
5-10km
Rate trees cut vs. replacement speed in Sahel
Rate trees cut vs. replacement speed in Sahel
30 times faster than replacement
2012 drought cereal harvest drop in Sahel
2012 drought cereal harvest drop in Sahel
25%
Acres of forestry cleared in Mali
Acres of forestry cleared in Mali
Over 500,000 acres