Chapter Notes - The World Population Distribution, Class 12, Geography | EduRev Notes

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THE WORLD POPULATION DISTRIBUTION, DENSITY AND GROWTH 

GIST OF THE LESSON: 

GENERAL, PATTERNS OF POPULATION DISTRIBUTION IN THE WORLD, DENSITY OF POPULATION,FACTORS INFLUENCING THE DISTRIBUTION OF POPULATION, POPULATION GROWTH, TRENDS IN POPULATION GROWTH, DOUBLING TIME OF WORLD POPULATION SPATIAL PATTERN OF POPULATION CHANGE, IMPACT OF POPULATION CHANGE, DEMOGRAPHIC TRANSITION, POPULATION CONTROL MEASURES. GENERAL:

  • people are real wealth of the country
  • Country is known by its people
  • Pop of the world is uneven

“ ASIA HAS MANY PEOPLE WHERE PEOPLE ARE FEW AND FEW PLACES WHERE PEOPLE ARE VERY MANY”-GEORGE B. CRESSEY PATTERNS OF POPULATION DISTRIBUTION

  • Pop. Distribution refers to “ the way the people are spaced over the earth surface”
  • 90 % of people are living in 10% of its land
  • 10 most populas countries (CHINA, INDIA, USA, INDONESIA, BRAZIL, PAKISTAN
  • CIS BANGLADESH HAPAN & NIGERIA) contribute 60% of population.

DENSITYOF POPULATION RATIO BETWEEN LAND AND PEOPLE,
Measured in persons per SQ. km Density = population /area

HIGH DENSITY AREAS: ( more than 200persons/sq km) NE USA, NW EUROPE, S, SE,& E ASIA

LOW DENSITY AREAS ( less the 1 person / sq km) HOT AND COLD DESERTS, LOW LATITUDE AREAS

MEDIUM DENSITY : (11-50 persons /sq.km)OTHER THAN ABOVE TWO AREAS

FACTORS INFLUENCING THE DISTRIBUTION OF POPULATION

1. GEOGRPHICAL FACTORS

  • Availability of water,
  • land forms,
  • climate,
  • soils


2. ECONOMIC FACTORS

  • Minerals,
  • urbanization,
  • industrialization

3. SOCIAL AND CULTURAL FACTORS

  • Religious factors,
  • social and political unrest,
  • border terrorism,
  • govt. policies

POPULATION GROWTH

  • Change in number of persons of a place during a specific
  • Period of time”
  • It may be positive or negative
  • It may be represented in absolute numbers /percentage
  • Change in pop. Is an indicator of eco. Development

BASIC CONCEPTS ARE:

  • growth of population,
  • growth rate of population,
  • natural growth of population,
  • +ve growth of population
  • –ve growth of population.

COMPONENTS OF POP. CHANGE

  • Birth rate,
  • Death Rate ,
  • Growth Rate ,
  • Migration

CRUDE BIRTH RATE: number of live births in a year per thousand of women
CBR= Bi/P X 1000

CBR= CRUDE BIRTH RATE

Bi: live births P = mid year population

CDR=NUMBER OF DEATHS IN A PARTICULAR YEAR PER THOUSAND POPULATION

CDR= D/P X 1000 CDR= CRUDE DEATH RATE

D= NO. OF DEATHS P= ESTIMATED MID YEAR POPULATION

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