Maarg Manthan · Topic 9.2

Factors Affecting the Distribution of Population (Physical, Socio-Cultural, Demographic)

Geography › Population and Demography · Topic 9.2

The distribution of population over the world is uneven and depends on physical, socio-cultural, economic and demographic factors. Physical factors are relief, climate, soils, water supply and minerals: plains with moderate climate, fertile soil and fresh water are densely populated, while high mountains, deserts and polar areas are thinly populated. Socio-cultural factors include religion, culture and conflict. Economic factors include industry, trade and services, and demographic factors are birth, death and migration rates. Technology can reduce the limits set by nature.

5 min read · UPSC Prelims · Geography · Population and Demography

At a Glance

Physical Relief, climate, soils, water, minerals
Socio-cultural Religion, culture, conflict
Economic Industry, trade, services
Demographic Births, deaths, migration
Densest regions River plains and coasts
Exam link UPSC Prelims, Geography: Population and Demography

Where Does It Fit?

This topic follows the concept of human resources and asks why people live where they do. It sets up the next topic, which maps the world distribution and density of population. Previous topic: Concept of Human Resources. Next topic: Global Population Distribution and Density Patterns.

What Factors Influence Distribution?

Group	Factor	Effect
Geographical	Water	People prefer places where fresh water is easily available; river valleys such as the Ganga, Nile, Yangtze and Indus are among the densest regions
Geographical	Landforms	Plains and gentle slopes favour crops, roads and industries, so the Ganga plain is densely populated, while the Himalaya is scarcely populated
Geographical	Climate	Extremes of heat, cold or rain deter settlement; pleasant climates, such as the Mediterranean, attracted people from early times
Geographical	Soils	Fertile loamy and alluvial soils support intensive agriculture and large populations, as in regur) Acidic leached soil Laterite Desert soil Arid soil, sandy Classification…">Types, Textures and Distribution of Soils in India
Economic	Minerals	Mining attracts industry and workers, as in the Chotanagpur plateau or the Zambian copper belt
Economic	Urbanisation and industrialisation	Cities and industrial belts, such as Kobe-Osaka in Japan, draw people through jobs and services
Social, cultural and political	Religion, culture, stability	Pilgrimage centres attract people, while conflict and unrest push them away; government policies on resettlement or on birth rates matter too

Technology can alter the pattern: irrigation has populated the Rajasthan desert along the Indira Gandhi Canal, and air transport and mining have created towns in remote areas, as in Indo-Gangetic-Brahmaputra Plain.

How Do Physical Factors Shape Population?

Factor	Effect on population	Examples
Relief	Plains are densely settled, mountains and plateaus thinly	Ganga plain, Nile valley, Yangtze plain versus the Himalaya and Andes
Climate	Moderate climates attract people; extreme cold, heat or drought repel	Temperate Europe and monsoon Asia versus Sahara, Arctic, Amazon interior
Soils	Fertile soils support intensive farming and dense populations	River alluvium, volcanic soils of Java, loess of China
Water	Fresh water is essential; rivers and coasts attract settlement	Nile, Indus, Ganga valleys
Minerals and energy	Mining and industry draw people even to harsh places	Ruhr, Chota Nagpur, Gulf oil fields

How Do Socio-Cultural, Economic and Demographic Factors Matter?

Socio-cultural: religious and cultural centres such as Varanasi, Jerusalem and Mecca attract people, while conflict, discrimination and political instability drive them away.
Economic: industrialisation, trade and services draw people to cities; the density of cities like Mumbai, Tokyo and Shanghai exceeds that of farm lands by far.
Technology and infrastructure: irrigation, air conditioning, roads and rail allow settlement in desert, steppe and mountain areas, as in the Indira Gandhi Canal region of Rajasthan.
Demographic: fertility, mortality and migration. High birth rates produce large populations in places such as the Gangetic plain, and migration redistributes them, as in Migration: Push and Pull Factors, Internal and Cross-Border Migration.
Government policy: family planning, settlement schemes and urban planning.
Historical: long-settled areas, with early farming and trade, are denser than areas settled recently. The Indo-Gangetic plain, the Nile valley and the plains of China have been cultivated and settled for thousands of years, while the Americas and Australia, settled intensively only in recent centuries, still have large areas of low density.
Disease and security: malaria and sleeping sickness kept many tropical lowlands thinly settled until they were controlled, and wars and refugee crises can empty or crowd areas within a few years.

The density of population in a place is the result of all these factors acting together over a long time, and a change in one factor, such as the opening of a canal, a mine or a factory, can alter it within a few decades. Delhi’s density of over 11,000 persons per sq km against under 20 in Arunachal Pradesh in the same country shows how wide the range can be. As an analytical point, the importance of physical factors has declined with technology, while economic factors have grown, but the great population clusters still lie in fertile river plains and coasts with a favourable climate, as described in Global Population Distribution and Density Patterns.

Why Is This Topic Important?

Concepts Types of density asked
India State patterns
Planning Carrying capacity

What Came Next?

The next topic describes global population distribution and density patterns. Next topic: Global Population Distribution and Density Patterns.

Key People and Terms

Density People per unit area
Physiological density People per cultivated area
Ecumene Permanently inhabited area
Anecumene Uninhabited area
Carrying capacity Population an area can support
Distribution Spread of people over space

Exam Corner

Points to Remember

90 per cent of people live on 10 per cent of land.
India’s density: 117 in 1951, 382 in 2011.
Bihar is the densest large state.
Arunachal has the lowest density.
Physiological density uses cultivated land.

Do Not Confuse With

Arithmetic and physiological density Total area versus cultivated area
Distribution and density Spread versus concentration
Ecumene and anecumene Inhabited versus uninhabited

Memory Hook

Water, plains, climate and soil pull; minerals and cities add; deserts, ice and peaks push.

Mains Angle

Questions ask for factors and India’s pattern. These points add depth.

Factors Physical, economic, social
Measure Three types of density
India Plains dense, hills sparse

A Question You May Face

An original practice question, not a past paper question.

“Explain the factors influencing the distribution of population in the world and account for the uneven distribution in India.”

How to Answer

Pattern Concentration in a few areas.
Factors Geographical, economic, social.
Density Three measures.
India State contrast.

GS Relevance

Prelims: factors affecting distribution of population. GS Paper 1: population and associated issues.

Frequently Asked Questions

What factors influence the distribution of population?

Distribution is influenced by geographical factors such as water, landforms, climate and soils, economic factors such as minerals, urbanisation and industrialisation, and social, cultural and political factors such as religion, stability and government policy. Plains with water and fertile soil are the most densely populated.

Why is the Ganga plain densely populated?

The Ganga plain has fertile alluvial soil, flat land, plentiful water from perennial rivers and canals, a favourable climate and a long history of settled agriculture. These conditions support intensive farming, dense transport networks and many cities, so it is one of the most densely populated regions of the world.

Why are river plains densely populated?

River plains have flat land, fertile alluvial soil, a reliable water supply and ease of transport, which support intensive farming and many people. They also suit towns, industry and trade. The Ganga plain, the Nile valley and the plains of the Yangtze are examples of such dense population clusters.

How do physical factors affect the distribution of population?

Physical factors such as relief, climate, soil, water and minerals decide how easily people can live and farm. Plains with a moderate climate, good soil and fresh water attract dense populations, while high mountains, deserts, polar lands and thick rainforests are sparsely populated.

How do economic factors affect population distribution?

Economic activity draws people to places with jobs. Cities with industry, trade and services, such as Mumbai or Tokyo, have very high densities, and mining regions attract workers even in hard environments. As economies change from farming to industry, people move from villages to towns.

PYQ Practice — Statement Analysis

1 Mountains and deserts generally have dense populations.

False

They are sparsely populated.

2 Delhi had the highest population density among Indian states and Union Territories in 2011.

True

It had 11,297 per sq km.

3 River plains are generally more densely populated than mountains.