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½ is too dry or too cold ½ of a ½ of a ¼ 75% water 25% land

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Presentation on theme: "½ is too dry or too cold ½ of a ½ of a ¼ 75% water 25% land"— Presentation transcript:

1

2 ½ is too dry or too cold ½ of a ½ of a ¼ 75% water 25% land
for large-scale agriculture 75% of world population lives along a river or a coastline. . . or 5% of the land area ½ of a ½ of a ¼ Or. . .

3 POPULATION Population concentrations 5. NORTHEAST NORTH AMERICA
3. EUROPE 2. SOUTH ASIA 1. EAST ASIA 4. SOUTHEAST ASIA

4 Arithmetic density # people total land area
POPULATION Population density Arithmetic density # people total land area = D. Hardin

5 Physiologic # people density total arable land = Agricultural # people
POPULATION Population density Physiologic density # people total arable land = Agricultural density # people total farmed land = D. Hardin

6 The ability of a given amount of land
POPULATION Population density Carrying Capacity: The ability of a given amount of land To support a given number of people At a given level of technology D. Hardin

7 (just a bit higher than Virginia)
POPULATION Population density Egypt Egypt 2011 Population – 80,410,017 Total Land Area – 390,117 sq. mi. Arable Land – 12,873 sq. mi. (3.3%) Farmed Land 1,950 sq. mi. (0.5%) Arithmetic Density 206 persons/sq. mi. (just a bit higher than Virginia) D. Hardin

8 Agricultural Density:
POPULATION Population density Egypt Physiologic Density: 6,246 persons/sq. mi. Agricultural Density: 41,236 persons/sq. mi.! D. Hardin

9 TP = OP + B – D + I - E POPULATION Population change Natural
Migration TP = OP + B – D + I - E Total Population Original Population Immigra- tion Emigra- tion Births Deaths D. Hardin

10 World average – 1.1% (down from 1.2%) That’s 70% of the population
Population change Rates of change Highest – Niger: 3.52% Lowest – Moldova: -0.68% World average – 1.1% (down from 1.2%) It’s all in the numbers. Take two countries with identical growth rates (.42%)… Grenada: 105,303 X .42% = 442 people annually China: 1,353,600,687 X .42% = 5,685,122 people annually That’s 70% of the population of Virginia every year! World: 7,072,887,517 X 1.1% = 77,801,762 people annually That’s nearly 10 Virginias every year! D. Hardin

11 POPULATION Population change 2000 2000 2050 2050 D. Hardin

12 POPULATION Demographic Transition Stage 1 Stage 2 Stage 3 Stage 4
Birth rate High Rate Total population Low Death rate Time D. Hardin

13 POPULATION Population Pyramids D. Hardin

14 POPULATION Demographic Transition & population pyramids Stage 1
Birth rate High Rate Total population Low Death rate Time D. Hardin

15 POPULATION Demographic Transition Stage 1 D. Hardin

16 POPULATION Demographic Transition & population pyramids Stage 1
Birth rate High Rate Total population Low Death rate Time D. Hardin

17 POPULATION Demographic Transition Stage 2 Nigeria Libya Iraq 2003
D. Hardin

18 POPULATION Demographic Transition Stage 2 [Youth serves the Fuhrer]
D. Hardin

19 POPULATION Demographic Transition Stage 2 Industrial Revolution
Medical Revolution Hans Rosling video D. Hardin

20 POPULATION Demographic Transition & population pyramids Stage 1
Birth rate High Rate Total population Low Death rate Time D. Hardin

21 POPULATION Demographic Transition Stage 3 India Egypt Israel D. Hardin

22 POPULATION Demographic Transition Stage 3 D. Hardin

23 POPULATION Demographic Transition Stage 3 D. Hardin

24 POPULATION Demographic Transition Stage 3 D. Hardin

25 POPULATION Demographic Transition Stage 3 D. Hardin

26 POPULATION Demographic Transition Stage 3 Brazil 1970s 1980s 1990s

27 POPULATION Demographic Transition Stage 3
NUMBER OF CHILDREN IN THE LAST THREE GENERATIONS Percentage

28 POPULATION Demographic Transition & population pyramids Stage 1
Birth rate High Rate Total population Low Death rate Time D. Hardin

29 POPULATION Demographic Transition Stage 4 Canada Australia United
States D. Hardin

30 POPULATION Demographic Transition Stage 4 …while allowing seniors
their independence… Social Security decreases poverty among the elderly… Per capita Social Security expenditures and poverty rate for 65+, …and creating the nuclear family. D. Hardin

31 POPULATION Demographic Transition & population pyramids Stage 1
Birth rate High Rate Total population Low Death rate Time D. Hardin

32 POPULATION Demographic Transition Stage 5 Japan Germany Switzerland
D. Hardin

33 POPULATION Demographic Transition Stage 5 Germany WW I
Hitler’s baby boom Stage 2 moving to Stage 3 WW II 1972 D. Hardin

34 POPULATION Demographic Transition Stage 5 Germany’s “Guest Workers”
D. Hardin

35 POPULATION Demographic Transition Stage 5 Germany’s “Guest Workers”
D. Hardin

36 POPULATION Demographic Transition Stage 5 Germany’s “Guest Workers”
D. Hardin

37 POPULATION Demographic Transition U.S. population pyramids D. Hardin

38 POPULATION Demographic Transition Geography of Ageing in the US
“Ageing in place” Retirement regions D. Hardin

39 POPULATION Demographic Transition Ageing U.S. population D. Hardin

40 TP = OP + B – D + I - E POPULATION Population change Natural
Migration TP = OP + B – D + I - E Total Population Original Population Immigra- tion Emigra- tion Births Deaths D. Hardin

41 POPULATION Migration Push (emigration) Political* Economic
Factors Push (emigration) Political* Economic Environmental Pull (immigration) Political Economic Environmental Forced or voluntary? Migrants on the Oregon Trail ( )? Mormon Migration ( )? African-American “Great Migration” ( )? Okies (1930s)? Retiring to Florida (1950-present)? Ethnic cleansing in the former Yugoslavia ( )? Millennial urban renaissance (2000-present)? Europe’s Syrian refugee problem (2015)? * Denotes a systemic influence, e.g. racism, ethnic, religious, or political persecution, war, etc. D. Hardin

42 Emigration & Immigration
POPULATION POPULATION Migration Emigration & Immigration "Give me your tired, your poor, Your huddled masses yearning to breathe free, The wretched refuse of your teeming shore. Send these, the homeless, tempest-tossed to me. I lift my lamp beside the golden door." D. Hardin

43 Emigration & Immigration
POPULATION Migration Emigration & Immigration Average Migrant Profile Young – average in the 20s (age most willing to do hard, distasteful work) Educated – average some high school; the best and brightest coming to US (“brain drain”) Motivated – decision to migrate is more than the average person is willing to risk; willing to endure hardship so their children will have better lives (“American Dream”) D. Hardin

44 POPULATION Migration Immigration Virginia
Region of Birth for Virginia’s Foreign Born 1990 2000 2010 D. Hardin

45 POPULATION Migration Immigration Virginia Hispanics e
Population Pyramids for Hispanic Citizens and Immigrants in Virginia, 2006 D. Hardin

46 POPULATION Migration Immigration U.S.-Mexico border San Diego
United States Mexico San Diego San Ysidro Tijuana D. Hardin

47 Hispanic population: U.S., 1980-2007
Migration Immigration Hispanic population: U.S., D. Hardin

48 POPULATION Migration Immigration Virginia Hispanics 2000 2014

49 POPULATION Migration Immigration Virginia Hispanics Loudoun – 14.0%
Fairfax – 16.5% Fairfax City – 17.0% Arlington – 15.9% Alexandria City – 16.8% Manassas City – 34.0% Manassas Park City – 33.4% Prince William – 22.4% Stafford – 11.5% Fredericksburg City – 11.0% Winchester City – 16.6% Harrisonburg City – 19.0% Galax City – 14.6% D. Hardin

50 POPULATION Migration Internal D. Hardin

51 POPULATION Migration Internal Exurban growth D. Hardin

52 POPULATION Migration Internal D. Hardin

53 Richmond Metropolitan Area
POPULATION Migration Local Richmond Metropolitan Area White Flight Stage 2 & New arrivals 1990s-00s City White Flight Stage 1 1970s-80s Inner suburbs Outer suburbs

54 POPULATION Demographic Transition & population pyramids Stage 1
Birth rate High Rate Total population Low Death rate Time D. Hardin

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