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POPULATION DISTRIBUTION
POPULATION DISTRIBUTION
• The way people are spread out across the earth
FACTORS INFLUENCING POPULATION DISTRIBUTION
• Physical conditions of place
• Level of development of people
POPULATION DENSITY OF THE WORLD
Greenland
Amazon Forest
Sahara Desert Ganges Valley
Western Europe
The world is UNEVENLY DISTRIBUTED.
Densely populated (> 100 persons per sq km)
Moderately populate
Sparsely populated (< 10 persons per sq km)
Population density
• Number of people living in a square kilometres of land (unit area of land)
• Total Population Total Area
• Will help to determine how crowded a place is.
Would you like to live in such an environment? Why?
The Saigon Delta
Why is this place so densely populated?
Would you like to live here? Why?
AmazonRiver
Would YOU like to live here?
Factors affecting population density
• Relief
• Climate
• Soils
• Mineral and energy resources
• Vegetation cover
• Accessibility
Factors affecting population density
• Densely populated areas
Relief
Low-lying, flat land – good for growing crops, build houses, roads, etc
Example: Nile Delta, Ganges Delta (India)
• Sparsely populated areas
• Relief• High mountainous –
poor – difficult for agriculture and housing
• Example: Mt Everest (Himalayas)
Factors affecting population density
• Densely populated areas
• Climate• Temperate –
sufficient temperature and rainfall – allow crops to grow
• Eg Western Europe, most parts of Asia
• Sparsely populated areas
• Climate• Harsh conditions eg
too hot (like desert)• Too cold (like
Antarctica)• Does not allow
cultivation
Factors affecting population density
• Densely populated areas
• Soils• Fertile, well-drained
soils – good for crops• Eg in deltas of • Chang Jiang (China)• Huanghe (China)• Ganges (India)
• Sparsely populated areas
• Soils• Poor, frozen soil;
cannot grow crops
Eg Tundra regions
Factors affecting population density
• Densely populated areas
• Vegetation cover• Less dense forest –
easier to clear for agriculture
• Sparsely populated areas
• Vegetation cover• Thick forest eg
Amazon Basin• Difficult to clear
Factors affecting population density
• Densely populated areas
• Mineral resources• Eg coal in Western
Europe• Eg oil in Brunei
• Sparsely populated areas
• Mineral resources• Lack of minerals /
energy resources
Factors affecting population density
• Densely populated areas
• Accessibility• Good transport
system • Encourages trade,
tourism, settlement, etc
• Sparsely populated areas
• Accessibility• High mountains, thick
forest hinders accessibility
Factors affecting population density
• Level of development
• Low level – few people
eg poor farming methods; few factories
• High level – more people
eg offices, high-tech factories … generate more jobs … more people
Other factors affecting population density
• Government decisions
Examples?