Indus river system: origin, tributaries and the Indus Waters Treaty
The Indus rises in Tibet and flows about 2,900 km to the Arabian Sea. Learn its five Punjab tributaries, the Panjnad, the Indus Waters Treaty of 1960, and why the river gave India its name.
The Indus, known in ancient India as the Sindhu, rises from a glacier near Bokhar Chu in the Kailash range of Tibet and flows about 2,900 km through Ladakh and Pakistan to the Arabian Sea near Karachi. Its great tributaries are the Jhelum, Chenab, Ravi, Beas and Sutlej, which join as the Panjnad, and its waters are shared between India and Pakistan under the Indus Waters Treaty of 1960.
Origin: the Sindhu of the Kailash range
The Indus rises from a glacier near Bokhar Chu in the Tibetan region, at an altitude of about 4,164 metres in the Kailash mountain range, not far from Lake Manasarovar. In Tibet it is called Singi Khamban, meaning 'Lion's mouth', and in ancient Indian texts it is the Sindhu, the river from which the name India is derived.
It is the westernmost of the great Himalayan rivers of the subcontinent. Its total length is usually given as about 2,900 km by Britannica, while other sources give 2,880 km or up to about 3,180 km, so exam answers should treat the length as approximate rather than exact.
Course: Ladakh, the gorges and the plains
From Tibet the river flows north-west between the Ladakh and Zanskar ranges, passing through Ladakh, where it receives Himalayan tributaries such as the Zanskar, Shyok, Gilgit, Hunza and Dras. Near Gilgit it cuts a spectacular gorge across the Ladakh range before emerging from the hills near Attock, where the Kabul river joins it from the right bank.
In India the Indus flows only through Ladakh. Its basin covers about 11,65,000 sq km in total, of which about 3,21,289 sq km lies in India. After Attock the river turns south through Pakistan's Punjab and Sindh plains, widening and slowing as it gathers its great tributaries, and finally discharges into the Arabian Sea east of Karachi.
The five rivers of Punjab and the Panjnad
The Indus system's most famous tributaries are the five rivers of Punjab: the Jhelum, Chenab, Ravi, Beas and Sutlej. They flow generally south-west from the Himalayas and the Punjab hills and meet one another in stages, with the Chenab collecting the Jhelum, Ravi and Beas before joining the Sutlej.
The combined stream is called the Panjnad, meaning 'five rivers', and it joins the Indus a little above Mithankot. Other right-bank tributaries joining from the west include the Kurram, Tochi and Gomal, which rise in the Sulaiman ranges.
Why the Indus matters: civilisation and the water treaty
The Indus valley hosted one of the world's earliest urban civilisations, and the river has watered the Punjab plains since ancient times. Today its system supports intensive irrigation and hydroelectric projects in both India and Pakistan, and its delta and lower reaches sustain fisheries and farming in Sindh.
Because the system crosses an international border, its waters are governed by the Indus Waters Treaty of 1960, brokered by the World Bank. Under the treaty, India received control of the three eastern rivers (Ravi, Beas and Sutlej) and Pakistan the three western rivers (Indus, Jhelum and Chenab), a division that remains a standard exam point.
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Frequently asked questions
Where does the Indus river originate?
The Indus originates from a glacier near Bokhar Chu in the Kailash range of Tibet, at an altitude of about 4,164 metres, near Lake Manasarovar.
What is the length of the Indus river?
The Indus is about 2,900 km long according to Britannica, with about 1,114 km of that in India. Other sources give up to about 3,180 km, so the figure varies by measurement.
Which are the five tributaries of the Indus in Punjab?
The five Punjab tributaries are the Jhelum, Chenab, Ravi, Beas and Sutlej. Together they form the Panjnad, which joins the Indus above Mithankot.
What is the Indus Waters Treaty?
The Indus Waters Treaty of 1960, brokered by the World Bank, shares the Indus system between India and Pakistan: India controls the eastern rivers (Ravi, Beas, Sutlej) and Pakistan the western rivers (Indus, Jhelum, Chenab).
Where does the Indus river fall into the sea?
The Indus discharges into the Arabian Sea east of Karachi, in Pakistan, through the Indus delta.