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Geography Presentation - Case Study

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by

Joyce Tam

on 26 September 2013

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Transcript of Geography Presentation - Case Study

Geography Presentation - Case Study 1
The Sahel

Welcome to Australia Dairy Company!!!場
Home
Melody and Mimi want to open a dairy product company -- Africa Dairy Company.


One day, they were watching TV and occasionally, came across a programme about the current issues in the Sahel, Africa...
The Sahel Today
Nomads move in search of water and pasture
Prolonged drought
Nomads have nowhere to find pasture and water. Livestock dies
Vegetation cannot regenerate. Pasture and water are used up
Tour guide
Environmental degradation
Natural causes:
Rainfall varies greatly from year to year
DROUGHT
Pasture available to herds decrease
Haman causes:
Interviewing farmers in the Sahel...
Go Go Go
!!!
The End

ThaNk YOu!
Nomadic herding (livestock include camels, goats, sheep, donkeys and cattle)
Water shortage - unreliable and inadequate rainfall (annual total of 200-600mm)
Labour as the main input; farming processes done by hand; the nomads consume most of the outputs, e.g. milk, meat and hides, and only sell a small part of them
Increase in population:
Increasing demand for food ->
converting grazing land to farmland
-> the soil becomes more exhausted
Increasing demand for food ->
reducing fallowing periods
-> depletion of soil nutrients
Improvements in transport -> rear more animals ->
overgrazing
-> land becomes barren
1. Migration of herds / Transhumance:
move herd according seasonal basis -> maintain
ecological balance

2. Keeping a variety of animal species:
prevents the complete consumption of any one
particular plant species -> provide a rich mix of
dairy products

3. Controlling the number of animals in the herd:
reduce and enlarge the size the herd -> thorny
plants and rough grass can grow well
Nomadic Herding
Physical constraints:
Water shortage -> inefficient irrigation system
Thin and infertile sub-arid brown soil -> erosion -> can only support shrubs and grass -> sparse vegetation and pastureland
Cultural constraints:
Simple and traditional technologies are used -> low crop yields
Poverty -> unable to improve the physical environment
Final destination?
A belt of land at the Southern edge of the Sahara Desert
People practice nomadic herding ->under threat
Environment degradation
Suffered from famine, poverty * WHY?
Misuse of water resources:
Local governments encourage nomads to become sedentary ->
dig wells and boreholes
to provide water -> more animals are grazed -> land around the boreholes is damaged
Water table will drop
-> water and pastureland used up -> livestock die
Full transcript