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Where in the world do people live and why

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  • pg 1
									Where in the world do
people live, and why?
     Human Geography
      Population Unit
       What are the world’s 10 most
       populous countries? (millions)
1.    China        ~   1,318
2.    India        ~   1,132
3.    USA          ~   302
4.    Indonesia    ~   232
5.    Brazil       ~   189
6.    Pakistan     ~   169
7.    Bangladesh   ~   149
8.    Nigeria      ~   144
9.    Russia       ~   142
10.   Japan        ~   128
           Population Distribution
► Four   Great Population Clusters
      East Asia:           24%
      South Asia:          23%
      Europe:              11%
      Southeast Asia:       8%
-----------------------------------------------------------
    Atlantic/Great Lakes America:               2%
► PopulationDot Maps: One dot represents a certain
  number of a population
                    Population
► Ecumene     is changing constantly
   The portion of Earth’s surface occupied by
    permanent human settlement
► Demographers       look at Population Density
   Measure of total population relative to land size
   Assumes an even distribution over the land
     ►Does   any country actually have this?
              Population Density
► Two   ways to look at Population Density
   Arithmetic Density
     ► Persons   per square mile
          (Ex.) U.S. = 3,717,425 square miles (incl. water)
          Approx. 302.7 million people (2008)
          81 people per square mile


   Physiological Density
     ► Persons  per square mile of arable land (farmable)
     ► Better picture of a countries population density/pressure
     ► 410 people per square mile in U.S.
                  Threshold?
► What    is a Threshold?
   Maximum amount something can take
► Is   there a Population Density Threshold?
   There is no particular population density beyond
    which a country is overpopulated
►3     Determining Factors for Threshold
   Development
   Resources
   Technology
                   World Population
► 6.7   Billion
   Growing at an ever decelerating rate
► How    do we get reliable population numbers?
   Census: Periodic and official count of a country’s
    population
        ► US   = every 10 years
   How accurate is the census?
   What groups might be misrepresented?
   Possibility that the 2000 census was off by 3.3 million
    people

								
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