Indus River System
Geography › Drainage Systems of India · Topic 15.2
The Indus rises near Lake Manasarovar in Tibet and flows about 2,880 km, of which about 1,114 km lie in India, before reaching the Arabian Sea near Karachi. Its tributaries in India, from west to east, are the Jhelum, Chenab, Ravi, Beas and Sutlej, which form the five rivers of the Punjab. The waters are shared with Pakistan under the Indus Waters Treaty of 1960, whose status is now disputed.
6 min read · UPSC Prelims · Geography · Drainage Systems of India
At a Glance
- Indus length About 2,880 km; about 1,114 km in India
- Source Near Lake Manasarovar, Kailas range
- Tributaries west to east Jhelum, Chenab, Ravi, Beas, Sutlej
- Gorge Syntaxial bend near Nanga Parbat
- Treaty Indus Waters Treaty, 1960
- Exam link UPSC Prelims, Geography: Drainage Systems of India
Where Does It Fit?
This is the second topic of the macro on the drainage systems of India. The previous topic classified the rivers, and this one describes the westernmost Himalayan river system. The next topic covers the Ganga river system. Previous topic: Classification of Drainage Systems of India. Next topic: Ganga River System.
What Is the Course of the Indus?
In short: the Indus is an antecedent river that starts in Tibet, runs along the Himalayas and crosses Ladakh before turning south through a deep gorge to the plains of Pakistan.
The Indus, known as the Sindhu in Sanskrit and the origin of the name India, rises from glaciers in the Kailas range near Lake Manasarovar. It flows north-west through Tibet, enters Ladakh and flows between the Ladakh and Zanskar ranges, at an average height of about 4,000 m with a very gentle gradient. The Zanskar joins it near Leh, and the Shyok joins near Skardu, with the Gilgit, Hunza and Dras among other Himalayan tributaries. North of Nanga Parbat, it makes a sharp southward turn, the western syntaxial bend, and cuts a gorge more than 5,000 m deep, as in Himalayan Ranges – Shiwaliks, Lesser, Greater and Trans-Himalaya. The Kabul river joins it near Attock; it crosses the Salt Range, and above Mithankot it receives the Panjnad, which carries the combined water of the five Punjab rivers. It enters the Arabian Sea south of Karachi through a large delta. The total drainage area is about 1.1 million sq km, more than half of it in Pakistan.
What Are the Tributaries of the Indus?
| River | Source | Course and features |
|---|---|---|
| Jhelum | Verinag spring in the Kashmir valley | Flows north-west to Wular Lake, then through the Baramulla gorge of the Pir Panjal; forms the India–Pakistan boundary for about 170 km; joins the Chenab at Trimmu; length about 724 km; the Kishenganga is a tributary |
| Chenab | Chandra and Bhaga streams near Bara Lacha La, at about 4,900 m | United as the Chandrabhaga; flows through the Pangi valley and enters the plain near Akhnur; joins the Sutlej downstream; the longest of the Punjab tributaries after the Sutlej |
| Ravi | Near Rohtang Pass | Flows between the Pir Panjal and Dhauladhar, cuts a gorge, enters the Punjab plain near Madhopur and joins the Chenab in Pakistan; length about 725 km |
| Beas | Near Rohtang Pass at about 4,060 m | Cuts the Dhauladhar; joins the Sutlej at Harike; about 460 km long and wholly in India; the Pong Dam is on the Beas |
| Sutlej | Manasarovar-Rakas lakes in Tibet at about 4,570 m | Enters India at Shipki La, cuts gorges, passes through the Naina Devi Dhar where the Bhakra Dam, forming the Gobind Sagar, stands; about 1,050 km in India; for about 120 km forms the boundary with Pakistan; joins the Indus above Mithankot |
In order from west to east the tributaries are the Jhelum, Chenab, Ravi, Beas and Sutlej, and in decreasing length, the Sutlej, Chenab, Ravi, Jhelum and Beas. The Beas–Sutlej–Ravi waters feed the Punjab and Haryana canal systems, and the Indira Gandhi Canal in Rajasthan, starting at Harike, brings water to the Thar desert.
What Is the Indus Waters Treaty and Where Does It Stand Now?
- The treaty: signed in 1960 with the World Bank as a party, it gives the three eastern rivers, the Ravi, Beas and Sutlej, to India for unrestricted use, and the three western rivers, the Indus, Jhelum and Chenab, mainly to Pakistan, with India allowed run-of-the-river hydropower and limited irrigation on them. In practice, India uses about 20 per cent of the system’s water. Disputes are handled through the Permanent Indus Commission, a neutral expert, and a court of arbitration.
- Projects: India’s hydropower projects on the western rivers include Baglihar and Salal on the Chenab, Kishenganga on a tributary of the Jhelum and Ratle on the Chenab, and Pakistan has raised objections on design features of some.
- Abeyance: in April 2025, after the Pahalgam attack, India announced that it was holding the treaty in abeyance. Pakistan rejected the move and called the treaty binding.
- Arbitration: on 31 August 2026, the Court of Arbitration at the Permanent Court of Arbitration held that the abeyance neither suspended nor terminated the treaty, and issued an interim order limiting work on the Ratle dam. India rejected the ruling, calling the court illegally constituted, and says that the abeyance remains in force. The separate neutral expert process on Kishenganga and Ratle continues, with a decision expected around mid-2027.
As an analytical point, the Indus treaty was seen for decades as a model of cooperation between rivals, and the present dispute shows how far water law now depends on political relations. Physically, India has limited storage on the western rivers, so changes in the use of water would take years of construction, whereas the legal and diplomatic effects are immediate. The Ganga and Brahmaputra systems face similar questions, as in Brahmaputra River System.
Why Is This Topic Important?
- Facts Tributaries and confluences asked
- Current affairs Treaty status
- Strategy Water diplomacy
What Came Next?
The next topic describes the Ganga river system. Next topic: Ganga River System.
Key People and Terms
- Sindhu Sanskrit name of the Indus
- Panjnad Combined waters of the five Punjab rivers
- Run-of-the-river Hydropower without large storage
- Permanent Indus Commission Treaty body of both countries
- Neutral expert Technical referee under the treaty
- Harike Confluence of Beas and Sutlej
Exam Corner
Points to Remember
- The Indus rises near Manasarovar.
- Order west to east: Jhelum, Chenab, Ravi, Beas, Sutlej.
- The Beas lies wholly in India.
- Bhakra Dam is on the Sutlej.
- The treaty was signed in 1960.
Do Not Confuse With
- Jhelum and Kishenganga Main river versus its tributary
- Eastern and western rivers Ravi-Beas-Sutlej versus Indus-Jhelum-Chenab
- Abeyance and termination Suspension of performance versus ending the treaty
Memory Hook
Jhelum, Chenab, Ravi, Beas, Sutlej: five into the Panjnad, then the Indus to the sea.
Mains Angle
Questions link the river system with the treaty. These points add depth.
- Geography Antecedent course
- Use Punjab canals and hydropower
- Law Treaty dispute
A Question You May Face
An original practice question, not a past paper question.
“Describe the Indus river system and examine the issues surrounding the Indus Waters Treaty.”
How to Answer
- Course Source to the sea.
- Tributaries Five rivers.
- Treaty Division of waters.
- Dispute Abeyance and arbitration.
GS Relevance
Frequently Asked Questions
Where does the Indus River rise?
The Indus rises from glaciers of the Kailas range in Tibet near Lake Manasarovar. It flows north-west through Ladakh, cuts a deep gorge near Nanga Parbat, enters Pakistan and falls into the Arabian Sea near Karachi after a course of about 2,880 kilometres, of which about 1,114 are in India.
Which are the tributaries of the Indus in the Punjab?
The five Punjab tributaries, from west to east, are the Jhelum, Chenab, Ravi, Beas and Sutlej. They join and form the Panjnad, which meets the Indus above Mithankot. The Beas is the only one wholly in India, and the Sutlej is the longest.
What is the Indus Waters Treaty?
The Indus Waters Treaty is a 1960 agreement between India and Pakistan, mediated by the World Bank, that gives India the three eastern rivers, Ravi, Beas and Sutlej, and Pakistan the three western rivers, Indus, Jhelum and Chenab, with India allowed limited uses such as run-of-the-river hydropower on them.
What is the present status of the Indus Waters Treaty?
India placed the treaty in abeyance in April 2025. On 31 August 2026 the Court of Arbitration held that the treaty remains in force, which India rejected as an illegal court. The neutral expert proceedings on the Kishenganga and Ratle projects continue, with a decision expected in 2027.
Where is the Bhakra Dam located?
The Bhakra Dam is on the Sutlej River at the Naina Devi Dhar gorge in Himachal Pradesh, and forms the Gobind Sagar reservoir. Together with the Nangal Dam downstream, it provides irrigation and hydropower to Punjab, Haryana, Rajasthan and Himachal Pradesh.
PYQ Practice — Statement Analysis
1 The Beas river flows entirely within India.
It joins the Sutlej at Harike.
2 The Indus rises in the Garhwal Himalayas.
It rises in Tibet near Manasarovar.
3 Under the 1960 treaty the Ravi, Beas and Sutlej were allocated to India.
These are the eastern rivers.
4 The Jhelum rises at Verinag in the Kashmir valley.
It flows through Wular Lake.
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