Case Study 9: Causes/management of Sahel desertification
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- Created by: louisb98
- Created on: 12-05-14 20:12
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- Case Study 9: Causes/effects /management of Sahel desertification
- Causes
- Physical factors
- Unpredictable rainfall
- Climate change (average rainfall has decreased)
- High temperatures cause high rates of evaporation
- Hot/dry winds blow away soil
- Heavy showers cause soil erosion
- Human factors
- Reduced death rate resulted in higher food demand
- More wood for cooking, so trees cut down
- Vegetation has been cleared for farming, reducing rainfall
- Herders have increased cattle populatipn which overgraze land
- Physical factors
- Location
- Sahel is a broad zone (700km wide) located of south of Sahara desert
- The Sahara covers large parts of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, West Sahara, Sudan and Tunisia.
- Management
- TREE PLANTING SCHEMES: Canopy gives shade meaning more water goes to soil to be absorbed
- BUILDING ROCK DAMS: Dams hold water back which means water can be stored
- REMOVING CATTLE: Removing cattle can cause less vegetation to be lost and decrease in soil erosion
- RAINWATER FROM BUILDINGS: Way of collecting and storing water to water crops and for cooking
- BUILD BUNDS (stone lines) ON SLOPES: Stones will reduce surface run-off with rocks reducing shade to keep water cool
- Causes
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