CONCEPTS OF POPULATION. Demography POPULATION GEOGRAPHY

CONCEPTS OF POPULATION

Demography

POPULATION GEOGRAPHY

GEOGRAPHIC ANALYSIS OF POPULATION- Distribution

• 90% live in northern hemisphere

- 2/3 located 300 miles to ocean• ½ live on 5% of the land on Earth

Dot Map

GEOGRAPHIC ANALYSIS OF POPULATION- Scale

• SMALL scale

OR

• Medium scale?

SMALL or LARGE SCALE?

DENSITY - Population Concentrations

ARITHMETIC DENSITY Total # of people / by total land area

USA 300 million people 9 million sq kilometers of land space

Arithmetic density = 33 people per sq Km

Physiologic Population Density• Measures the pressure people

place on land to produce enough food. Divides the pop by the sq km of arable land

Arithmetic density PPD

Egypt: 74 3,500

90% of Egyptians live in the Nile Delta and live in 5% of the country's territory - 44% in urban areas and most in some 4,000 villages.

CARRYING CAPACITY• The number of individuals who can be supported in a given

area within natural resource limits, and without degrading the natural social, cultural and economic environment for present and future generations.

• The carrying capacity for any given area is not fixed. It can be altered by improved technology, but mostly it is changed for the worse by pressures which accompany a population increase.

• As the environment is degraded, carrying capacity actually shrinks, leaving the environment no longer able to support even the number of people who could formerly have lived in the area on a sustainable basis.

CARRYING CAPACITY• China food production will

decline by 37% by the late 21st century

• China's population will to 1.5 billion by 2050 placing a strain on the entire carrying capacity of the world.

• reduction in agricultural capability in China (as in other world regions) is largely due to the world Water crisis

Population Pyramid: TEXAS

JAPAN