Population Movement

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Population Movement Migration

• How and Why do People Move?

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Cyclic Movement

• Centered on activity spaces
• Start and end at home
• Commuting
• To/from work and school
• Seasonal
• Regular relocation by season
• Nomadism
• Regular patterns of movement across territory

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Commuting
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Seasonal
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Nomadism
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Periodic Movement

• Start and end at home
• Longer period of time away from home
• Migrant Labor
• Temporary work in other places
• Remittances
• Transhumance
• Local seasonal shifts in farming
• Military service

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Migration

• Permanent relocation across large distances
• International
• Between countries
• Internal
• Usually rural to urban
• Also to areas of opportunity/low costs

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Global Migration Flows
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Whats the fastest growing city in the US?
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Characteristics of Migration

• Ernst Ravenstein (1876) Laws of Migration
• Some still hold true
• Most migrants move only a short distance
• Distance decay
• Step migration
• Longer distances reached in stages
• Intervening opportunity
• Some migrants never reach their final destination

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Characteristics of Migration

• Migrants that move greater distances tend to go
  to cities
• Migration flows produce counterflows
• People move out as others move in
• Sequent occupance
• Families are less likely to migrate than young
  adults
• Most international migrants are young males

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Gravity Model

• Relationships are directly related to size of
  populations and inversely related to distance
  between them
• Critical distance
• Distance beyond which cost, effort and means will
  prevent migration from occurring
• Thus, larger cities have a greater gravitational
  pull than smaller ones