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(P) Where are the People (Population Density (The average number of people…
(P) Where are the People
Population Density
The average number of people per square km
The total population divided by the total area
Population distribution
Spread of people in any given area
Resources, terrain and population Densities
Case Study One
Some population variation within Italy
North Italian Plain
Land
Alluvial soil (rich in nutrients)
Flat
Agriculture
Plentiful rainfall
Summer heat
Prosperous
High yield per hectare
Transport
Dense transport network
Railway lines
Canals
Roads
Manufacturing
Industrial heart of Italy
Southern Italy
Land
Apennine Mountains
80% is mountainous
Soil cover thin
Agriculture
Poor soil
Long dry summer
Farms are small & unproductive
Transport
Building is hard
Discouraged trade
Manufacturing
Shortage of capital
Shortage of communications
Shortage of industrial
Discouraged manufacturing
Case Study Two
Some population variation within Dublin Region
Dublin contains one third of Irelands population
The Dublin mountains
Very low density
Short distance from southern suburbs distance
They have been preserved by amenity zone
Urban development is not allowed
Lightly populated
West County Dublin
High density and growing rapidly
Has experience very raped growth
Contains outer suburbs such as Bluebell and Greenhill's
Big satellite towns have grow rapidly in resent years
Many satellite towns serve as dormitory or commuter towns
North County Dublin
Moderate density
Has been hindered by Dublin Airport and Finagles fertile land
Near the cost of population densities is much higher
Dublin City and Older Suburbs
High Density
Densely populated because of jobs and services
Leading commercial and industrial city
Chief port and meeting place of roads and railway lines
Capital city - wear governments meet
Biggest education centre
Migration from other parts of Ireland
How Social and Historical Factors Affect Population Densities
Case study One
The west of Ireland
Varied over time
Early nineteenth century
Population grew rapidly
Farms divided land between sons
Lots of people have access to small plot of land
Large amount of food per acre
Between 1845 and 1849
Blight destroyed the potato crop
The great famine occurred
One in four emigrated or died
Population fell dramatically
After the famine
Farms left land to oldest son
Fewer people had access to land
People who had no land usually emigrated
Population fell steadily
1960s
economy inproved
People had more wealth
Emigration slowed down
Population stabilised
Late 1990s
Celtic tiger
Much more jobs
Population began to increase
Why people migrate
Terrain is hilly, rocky and boggy - not easy to farm
Few local industries or services
Low employment
Limited entertainment
Difficult for people to get planning permission
People move to large urban areas
Excellent education services
Jobs are plentiful
Lots of entertainment
Case Study Two
Population variations in Brazil
Coastally areas
Portuguese colonised the cost
Trading towns grow into industrial sities
Rio de Jeneiro
Sao Paulo
Plantation wear set up in the cost
High population
Amazon Basin
Lightly populated
Amerindian (locals) people
Not colonists
Seven percent of the population