Overpopulation in the Sahel Region (Leaving Cert Geography): Flashcards
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What type of grassland is the Sahel?
What type of grassland is the Sahel?
Savannah grassland
Current population of Sahel region
Current population of Sahel region
Over 100 million people
Sahel carrying capacity (people per km²)
Sahel carrying capacity (people per km²)
30 people per km²
Rate Sahara Desert expands southward (km/year)
Rate Sahara Desert expands southward (km/year)
5-10 kilometres
What is a savannah?
What is a savannah?
Grassy plain in tropical/subtropical regions with sparse trees
What is laterite?
What is laterite?
Hard, impermeable clay soil formed by intense heat in tropics
What is gullying?
What is gullying?
Deep channels carved into soil by flowing rainwater
What are ecological refugees?
What are ecological refugees?
People forced to migrate due to environmental factors
Demographic Transition Model stage for most Sahel countries
Demographic Transition Model stage for most Sahel countries
Stage 2
Lake Chad current size (% of original)
Lake Chad current size (% of original)
5% of original size
Deaths from Darfur conflict
Deaths from Darfur conflict
Over 300,000
% Sahel wet season shortened (past 30 years)
% Sahel wet season shortened (past 30 years)
29%
What is sedentary farming?
What is sedentary farming?
Confining animals in fenced enclosures rather than roaming
Most effective solution to Sahel overpopulation
Most effective solution to Sahel overpopulation
Education of women
Annual topsoil loss in Mauritania (tonnes)
Annual topsoil loss in Mauritania (tonnes)
Over 100 million tonnes