DTM and Population Pyramids

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Transcript of DTM and Population Pyramids

  • 1. Population

2. Net Migration RateImmigration rate (people arriving in Canada)Emigration rate (people leaving Canada)NET MIGRATION RATE 3. Population Growth RateBirth RateDeath Rate Net Migration Rate POPULATION GROWTH RATE 4. Doubling TimeDoubling time= time it takes for a population to double 70=number of yearsfor population to% rate of population growth double 5. Demographic Transition Model Outlines natural stages of growth anddevelopment Demographer tool to analyze and understandpopulation numbers and change 6. Demographic Transition Graph 7. Demographic Transition Model Stage 1- high birth, high death=small growth High infant mortality Low life expectancy Common a few hundred years ago, and indeveloping countries today 8. Demographic Transition Model Stage 2- High birth, low death= populationexplosion Medical & scientific advances Vaccines, drinking water, sewage systems 1800s 9. Demographic Transition Model Stage 3- low death, declining birth Social programs, industrialization, urbanization=smaller families 10. Demographic Transition Model Stage 4- low birth, low death=slow populationgrowth Changing role of womenLower birthrates Family planning programs Some African countries, birth rates still high Sub-Saharan Africa- HIV= high death 11. Demographic Transition Model Stage 5- birth rate lower than death rate Future, however some European nations and Japan starting to enter this stage 12. Population Pyramids Analyze individual region population growthdevelopment trends Data organized in cohort groups Another demographer tool Created by graphing a series of horizontal bargraph lives at intervals of 5 years Shape- demographer classifies pyramid intofour major categores 13. P. Pyramids- Early Expanding1) EARLY EXPANDING- Wide base= high birth rate- Narrow top= short life expectancy*few countries today fall in this category 14. P. Pyramids- Expanding2) EXPANDING- Wide base= high birth rates- Middle expands= improved medical care,modern hygiene, improved diet 15. P. Pyramids- Stable3) STABLE- Birth rate falls= changing attitude towardsfamily (Education programs, changing societalattitudes, economic factors)- Death rate lowered= improved medical care 16. P. Pyramids- Contracting4) Contracting- Very low birth rate= women in workforce, child-rearing isexpensive, contraception, state encouragessmall families- Death rate continues to decrease- Life expectancy increases 17. P. Pyramids- Early ExpandingNigeria, 2005 18. Early ExpandingScotland, 1861 19. P. Pyramids- Early Expanding 20. P. Pyramids- Expanding 21. P. Pyramids- Expanding 22. P. Pyramids- Stable 23. P. Pyramids- Stable 24. P. Pyramids- Contracting 25. BC- 1996 26. Developing/Developed RegionsDeveloping regions: historically uneven economic and population growth levels Early expanding and expanding p.pyramidsDeveloped regions: relatively wealthy and stable in economic growth Stable & contracting p.pyramids 27. DependencyDependency: measure of the population ofpeople who are too old or too young to work- require governmental supportDependency ratio:% of young dependents + % of old dependentsdivided by the percentage of people aged 15-64 28. Canadas Stats2011- EstimationsPopulation Growth Rate: approximately .8%Age structure: 0-14 years: 15.7% (male2,736,737/female 2,602,342)15-64 years: 68.5% (male 11,776,611/female11,517,972)65 years and over: 15.9% (male2,372,356/female 3,024,571) (2011 est.) 29. Canadian StatsEstimated that by 2041- 23% population 65+- Affects government spending (healthcare) & immigration ratesConclusions: Entering DTM Stage Four, Stabalizing 30. P. Pyramids- Stable 31. So whatSome countries are overpopulated, while othersare depopulating. How does this happen?