Maarg Manthan · Topic 15.2

Major Rivers of the World (Nile, Amazon, Mississippi-Missouri, Yangtze, Volga, Danube)

Geography › World Physical and Regional Geography · Topic 15.2

The major rivers of the world are the Nile, Amazon, Mississippi-Missouri, Yangtze, Volga and Danube. The Nile and the Amazon are each about 6,400 to 6,650 km long, the Amazon carries the largest volume of water of any river, the Volga is the longest river in Europe, and the Danube flows through more countries than any other river. Each of them has a different course, basin, climate and economic role.

6 min read · UPSC Prelims · Geography · World Physical and Regional Geography

At a Glance

Longest Nile or Amazon, about 6,400 to 6,650 km
Largest discharge Amazon
Longest in Europe Volga, about 3,530 km
Most countries Danube, 10 countries
Longest in Asia Yangtze, about 6,300 km
Exam link UPSC Prelims, Geography: World Physical and Regional Geography

Where Does It Fit?

This topic follows the major mountain ranges, since most of the great rivers rise in highlands and run to the sea or to an inland lake. It applies the drainage ideas in Running Water Depositional Landforms: Alluvial Fans, Deltas, Floodplains, Natural Levees, Meanders, Oxbow Lakes, Braided Channels to real river systems of the world. Previous topic: Major Mountain Ranges of the World (Himalayas, Andes, Rockies, Alps, Atlas, Ural). Next topic: Major Deserts of the World (Sahara, Gobi, Kalahari, Atacama, Thar) and Their Formation.

Which Are the Six Great Rivers and Where Do They Flow?

River	Length and basin	Source to mouth	Countries and notes
Nile	About 6,650 km, among the longest	Rises from Lake Victoria region and Ethiopian highlands (White Nile and Blue Nile), joins at Khartoum, flows north to the Mediterranean	Egypt, Sudan, South Sudan, Uganda, Ethiopia and others; delta in Egypt; Aswan High Dam
Amazon	About 6,400 km; basin of about 7 million sq km	Rises in the Peruvian Andes, flows east across Brazil to the Atlantic	Brazil, Peru, Colombia and others; largest discharge on Earth; rainforest basin
Mississippi-Missouri	Missouri-Mississippi about 6,275 km together	Rises in the Rocky Mountains (Missouri), joins the Mississippi, flows south to the Gulf of Mexico	United States; large delta in Louisiana; Great Plains agriculture
Yangtze	About 6,300 km, longest river of Asia	Rises on the Tibetan Plateau, flows east across China to the East China Sea at Shanghai	China; Three Gorges Dam; rice and industrial belt
Volga	About 3,530 km, longest river of Europe	Rises in the Valdai Hills, flows south-east to the Caspian Sea	Russia; canals and dams; inland drainage, no ocean outlet
Danube	About 2,850 km	Rises in the Black Forest of Germany, flows east to the Black Sea	Flows through or borders 10 countries; Vienna, Budapest and Belgrade lie on it; delta in Romania and Ukraine

Lengths differ slightly in sources, since the true source of a river and the way of measuring its meanders vary, so the order of the Nile and the Amazon is sometimes debated. The Nile is usually said to be the longest, while the Amazon is the largest by volume and basin.

What Features Does Each River Show?

Nile: flows north through the Sahara, and its annual flood has made Egypt a fertile oasis since ancient times. The Aswan High Dam, completed in 1970, created Lake Nasser, controls floods and gives electricity and irrigation, but has reduced silt. The river ends in a large delta.
Amazon: carries about one-fifth of the fresh water that all rivers deliver to the oceans. It is wide, deep and navigable far inland, and its basin holds the largest tropical rainforest. It has hundreds of tributaries, such as the Rio Negro and Madeira.
Mississippi-Missouri: the main waterway of the American interior, with tributaries such as the Ohio and Arkansas. Levees and locks control floods and support barge traffic for grain.
Yangtze: drains a huge populous basin. The Three Gorges Dam, the largest hydroelectric project in the world, gives power and flood control but displaced many people.
Volga: the national river of Russia, linked by canals to the Don, the Baltic and the White Sea, and carries oil, timber and grain. It freezes in winter and drains to the Caspian, an inland sea.
Danube: an international waterway linked to the Rhine and Main by the Rhine-Main-Danube canal, which joins the North Sea with the Black Sea.

Why Do Rivers Matter for Geography?

Civilisation and agriculture: the Nile valley, the Yangtze plain and the Mississippi basin are among the most productive farming regions. Deltas such as that of the Nile are rich but are also exposed to sea-level rise (see Running Water Depositional Landforms: Alluvial Fans, Deltas, Floodplains, Natural Levees, Meanders, Oxbow Lakes, Braided Channels).
Navigation and trade: the Danube, Volga and Mississippi move bulk cargo; the Amazon is the main road of its basin.
Power and dams: the Three Gorges and Aswan projects show the benefits and costs of large dams, a theme also met in Sutlej; Himachal Pradesh and Punjab Hirakud Mahanadi; Odisha Tehri Bhagirathi; Uttarakhand; 260.5 m Sardar Sarovar Narmada; Gujarat…">Multipurpose River Valley Projects and Major Dams of India (Bhakra Nangal, Hirakud, Tehri, Sardar Sarovar).
Politics and sharing: the Nile and the Danube cross many countries and raise questions on water sharing, as with the Grand Ethiopian Renaissance Dam on the Blue Nile.
Pollution and ecology: industrial and farm runoff degrades the Yangtze and the Mississippi, whose nutrient flow also causes a dead zone in the Gulf of Mexico.

Approximate figures are used throughout this page and should be checked against the latest source when needed.

Why Is This Topic Important?

Map work Source, mouth, countries
Economy Dams, navigation, farming
Link Drainage and deltas

What Came Next?

The next topic describes the major deserts of the world, some of which, like the Sahara, are crossed by the Nile. Next topic: Major Deserts of the World (Sahara, Gobi, Kalahari, Atacama, Thar) and Their Formation.

Key People and Terms

River basin Area drained by a river and its tributaries
Delta Silt deposit at the mouth
Discharge Volume of water per second
Tributary River that joins a larger river
Inland drainage River ending in a lake or sea without outlet to ocean
Levee Raised bank to hold floods

Exam Corner

Points to Remember

The Nile flows north to the Mediterranean.
The Amazon has the largest discharge.
The Volga drains into the Caspian Sea.
The Danube passes through 10 countries.
The Yangtze is the longest river in Asia.

Do Not Confuse With

Longest and largest Nile is longest; Amazon carries most water
Volga and Danube Caspian outlet versus Black Sea outlet
Missouri and Mississippi Tributary and main river that merge

Memory Hook

Nile north, Amazon east, Volga to the lake, Danube east, and Yangtze to the sea: remember which one flows where for free.

Mains Angle

Questions ask for river basin comparison and the role of rivers in economies. These points add depth.

Basin Source, course, delta
Use Farming, power, trade
Issues Dams, sharing, pollution

A Question You May Face

An original practice question, not a past paper question.

“Compare the Nile and the Amazon river systems in terms of their course, basin characteristics and economic importance.”

How to Answer

Course Source to mouth.
Basin Climate and tributaries.
Economy Delta, dams, rainforest.
Issues Sharing, ecology.

GS Relevance

Prelims: length, source, mouth, countries, tributaries and dams of the major world rivers. GS Paper 1: drainage and river systems of the world.

Frequently Asked Questions

Which is the longest river in the world?

The Nile, at about 6,650 kilometres, is usually called the longest river in the world, though some measurements place the Amazon, of about 6,400 kilometres, close or longer. The Nile flows north from the highlands of East Africa and Ethiopia through Sudan and Egypt to the Mediterranean.

Which river has the largest discharge?

The Amazon has the largest volume of water of any river, carrying about one-fifth of all the fresh water that rivers deliver to the oceans. It rises in the Peruvian Andes, flows across Brazil to the Atlantic Ocean, and drains a basin of about seven million square kilometres.

Where does the Volga river end?

The Volga ends in the Caspian Sea, which is an inland sea with no outlet to the ocean. At about 3,530 kilometres it is the longest river in Europe. It rises in the Valdai Hills of Russia and is linked by canals to the Don, the Baltic and the White Sea.

Through how many countries does the Danube flow?

The Danube flows through or along the borders of 10 countries, more than any other river in the world. It rises in the Black Forest of Germany, passes Vienna, Budapest and Belgrade, and reaches the Black Sea in a delta shared by Romania and Ukraine.

Which is the longest river of Asia?

The Yangtze, of about 6,300 kilometres, is the longest river of Asia and the longest to flow entirely within one country, China. It rises on the Tibetan Plateau, passes the Three Gorges Dam, and meets the East China Sea near Shanghai.

PYQ Practice — Statement Analysis

1 The Volga river drains into the Black Sea.

False

It drains into the Caspian Sea.

2 The Amazon has the largest discharge of any river.

True

It carries about one-fifth of river water to the oceans.

3 The Nile flows from north to south.