NOTES Geography Chapter 6 (Class 9, CBSE, NCERT): "Population".

 

summary for Geography Chapter 6 (Class 9, CBSE, NCERT): "Population".

Chapter 6: Population

Population refers to the total number of people living in a particular area, such as a country or region. In this chapter, we focus on India’s population, its distribution, density, growth, and the various factors that influence population trends. Understanding population dynamics is important because population affects resources, infrastructure, economy, and environment.

1. Population Growth and Distribution

1.1 Population Growth

  • Population growth is the change in the number of people in a given area over a specific period. India has one of the highest population growth rates in the world.
  • India’s population has increased significantly over the past century. According to the Census of India, the population has risen from approximately 238 million in 1901 to over 1.4 billion today.
  • Factors contributing to population growth include:
    • Improved healthcare and medicine, leading to a lower mortality rate.
    • Increased agricultural productivity, leading to better food availability.
    • Fertility rate (the number of children born to women) has been high, though it has been declining in recent years.

1.2 Population Distribution

  • Population distribution refers to the pattern in which people are spread across the land.

  • In India, the population is unevenly distributed. Some areas are densely populated, while others are sparsely populated.

  • Factors influencing population distribution:

    • Physical factors like climate, soil, and water availability.
    • Economic factors such as the availability of jobs, industries, and trade.
    • Political and historical factors, including the development of cities and towns.

  • Dense Population Areas:

    • Ganga-Brahmaputra plains and the coastal regions like Mumbai, Kolkata, and Chennai are densely populated due to fertile land, good climate, and proximity to trade routes.

  • Sparse Population Areas:

    • Himalayan region, Thar desert, and central India have fewer people because of extreme climates, lack of resources, and difficult terrain.

2. Population Density

  • Population density refers to the number of people living per unit area (e.g., per square kilometer).
  • India’s population density is one of the highest in the world, with an average density of over 400 people per square kilometer.
  • Areas with high population density in India include:
    • West Bengal, Bihar, Uttar Pradesh, and Kerala.
  • Areas with low population density include:
    • Jammu & Kashmir, Himachal Pradesh, Rajasthan, and the Northeastern States.

3. Population Composition

Population composition refers to the structure of the population based on different factors like age, sex, literacy, and occupation.

3.1 Age Composition

  • The population is divided into three broad age groups:
    • 0-14 years (Children): This is the dependent population as they are not yet part of the workforce.
    • 15-59 years (Working Age): This group contributes to the economy and is known as the productive population.
    • 60 years and above (Elderly): This group is also dependent and requires care and support.

3.2 Sex Ratio

  • The sex ratio refers to the number of females for every 1,000 males in a population.
  • India’s sex ratio is slightly lower than the global average, with more males than females.
  • Some states like Kerala have a higher female population, while states like Uttar Pradesh and Bihar have a lower ratio.

3.3 Literacy Rate

  • Literacy rate indicates the percentage of people above the age of 7 who can read and write with understanding.
  • States like Kerala, Goa, and Delhi have higher literacy rates, while states like Bihar, Uttar Pradesh, and Rajasthan have lower literacy rates.

3.4 Occupational Structure

  • Occupational structure refers to the distribution of people in different occupations. India’s workforce is primarily engaged in:
    • Primary Sector (agriculture, mining): Large percentage of rural population.
    • Secondary Sector (manufacturing, industries): Growing number of people are moving to cities and industries.
    • Tertiary Sector (services, business, trade): Increasing growth in urban areas.

4. Population Growth: Causes and Consequences

4.1 Causes of Population Growth

  • Improvement in Healthcare: Better medical facilities have reduced death rates.
  • High Birth Rate: Despite a decline, India’s birth rate remains higher than the death rate, leading to an increase in population.
  • Agricultural Growth: Increased food production has led to improved survival rates.
  • Government Policies: Some policies, including child welfare and health programs, have increased population growth.

4.2 Consequences of Overpopulation

  • Pressure on Resources: Increased population places pressure on essential resources like water, food, and energy.
  • Unemployment: The growing population leads to a higher demand for jobs, but the supply of jobs is limited, causing unemployment.
  • Environmental Degradation: Overpopulation leads to deforestation, loss of biodiversity, pollution, and climate change.
  • Overcrowded Cities: Rapid urbanization leads to slums, poor living conditions, and inadequate infrastructure.

5. Measures to Control Population Growth

India has adopted several measures to control population growth:

5.1 Family Planning Programs

  • The government has launched various family planning programs to encourage smaller families, including awareness campaigns about contraception and reproductive health.

5.2 Education and Women’s Empowerment

  • Promoting female education and empowering women can help reduce birth rates, as educated women tend to have fewer children.

5.3 Health Programs

  • Improving healthcare for women and children and offering better access to contraception can help reduce maternal and infant mortality rates.

5.4 Government Policies

  • Various policies, such as the National Population Policy, aim to reduce the birth rate through awareness, healthcare, and incentives for smaller families.

6. Urbanization and Its Impact on Population

  • Urbanization is the increasing movement of people from rural areas to cities. India has seen rapid urbanization, with major cities like Mumbai, Delhi, Kolkata, and Chennai growing rapidly.

Impact of Urbanization:

  • Economic Growth: Cities offer better employment opportunities and contribute significantly to the national economy.
  • Infrastructure Stress: Urbanization leads to overcrowding and pressure on infrastructure, leading to problems like traffic congestion, pollution, and inadequate housing.
  • Lifestyle Changes: Urbanization leads to changes in lifestyle, with better access to healthcare, education, and technology.

Key Points to Remember

  1. Population Growth: India’s population has grown significantly due to improved healthcare and high fertility rates.
  2. Population Distribution: The population is unevenly distributed, with dense populations in fertile regions and sparse populations in difficult terrains.
  3. Population Density: India has a high population density, with some states being more densely populated than others.
  4. Population Composition: India’s population is diverse, with variations in age groups, literacy, and sex ratio.
  5. Causes and Consequences: Population growth is due to healthcare improvement and high birth rates but leads to challenges such as unemployment and environmental degradation.
  6. Control Measures: Family planning, women’s education, and government policies are key to controlling population growth.
  7. Urbanization: Rapid urbanization in India brings both opportunities and challenges, including economic growth and infrastructure stress.

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