The Indira Gandhi Canal is India’s longest canal: a gravity-fed irrigation channel that takes water from the Sutlej and Beas rivers at the Harike Barrage in Punjab and carries it south-west into the Thar Desert of Rajasthan, ending near Gadra Road in Barmer district, a few kilometres from the Pakistan border. Its main line, the 204 km Rajasthan Feeder plus the 445 km Indira Gandhi Main Canal, is 649 km long, and with its two tail branches the course reaches about 837 km. Begun in 1958 as the Rajasthan Canal and renamed on 2 November 1984 after the assassination of Prime Minister Indira Gandhi, it was finished in two stages, in 1983–86 and 2010, and now supplies irrigation and drinking water to the districts of Hanumangarh, Sri Ganganagar, Bikaner, Phalodi, Jaisalmer and Barmer.
Harike Barrage: where Sutlej and Beas water enters the system
Everything starts at Harike, a village in Punjab’s Tarn Taran district about 45 km north-east of Firozpur. Just below the point where the Beas joins the Sutlej, a barrage holds the combined river back and diverts it into three canals: the Ferozepur Feeder, the Makhu (Makku) Feeder and the Rajasthan Feeder, which is the head of the Indira Gandhi Canal. Together those three channels can carry about 29,000 cubic feet per second (820 m³/s), shared between command areas in Punjab and Rajasthan.
The water arriving at Harike is not a natural flow. Both rivers are regulated far upstream, the Sutlej by the Bhakra Dam and the Beas by the Pong Dam in Himachal Pradesh, an earth-fill embankment 133 m high completed in 1974 whose reservoir, Maharana Pratap Sagar, holds a live storage of about 7.29 billion m³. That storage is what allows a desert canal to run through the dry months. It came at a human cost: about 90,702 people from 339 villages were displaced by the Pong reservoir and were supposed to be resettled on land in Rajasthan, a promise that was still partly unfulfilled in 2014, when 9,732 land requests remained pending.
The barrage also created an unintended by-product. The pond behind it spread into the Harike Wetland, about 4,100 ha across the Tarn Taran, Ferozepur and Kapurthala districts, which was declared a bird sanctuary in 1982 and listed as a Ramsar site in 1990. It is the largest wetland in northern India, and every winter it fills with migratory waterfowl that stop beside the intake of a canal built to water a desert.
The 204 km Rajasthan Feeder across Punjab and Haryana
The first section, the Rajasthan Feeder, runs north to south-west for 204 km from Harike to Masitawali, a village about 30 km south-east of Hanumangarh. It crosses Punjab, clips the north-western corner of Haryana and enters Rajasthan, where it hands its water to the main canal at Masitawali.
Its route was not drawn on a blank map. Since 1927 the region had already been fed by the older Ganga Canal, built for the princely state of Bikaner by Maharaja Ganga Singh after the famine of 1899–1900. That canal takes Sutlej water from the Ferozepur headworks and was opened on 26 October 1927 by the viceroy, Lord Irwin, with 89 miles of lined channel. It proved that Punjab water could make the northern edge of the Thar productive, and it is the reason Sri Ganganagar district was already irrigated farmland when the far larger Rajasthan scheme was planned. Partition in 1947 made the question urgent: the Ferozepur headworks ended up a few kilometres from the new border, and Bikaner’s prime minister K. M. Panikkar had warned Lord Mountbatten that losing them to Pakistan would leave the state with no choice but to accede to Pakistan.
Masitawali to Mohangarh: how the 445 km main canal runs on gravity
At Masitawali the water passes into the Indira Gandhi Main Canal, which flows 445 km south-west through Hanumangarh, Bikaner, Phalodi and Jaisalmer districts to Mohangarh, a village about 60 km north-east of Jaisalmer city. The main line needs no pumping station: it follows the gentle natural fall of the land, along a dry channel of the ancient Ghaggar river system. Researchers at ISRO, ONGC and the Vaidik Saraswati Nadi Shodh Sansthan in Jodhpur have argued that this paleochannel is one course of the river the Rigveda calls the Sarasvati, and when the canal was inaugurated in 1980 an inscription on its bank called it the “Saraswati Rupa Rajasthan Canal”. That identification is a research claim with religious significance rather than settled fact, but the dry riverbed itself is real and gives the canal its slope.
The engineering was planned on a large scale. The main canal was designed to be 43 m (140 ft) wide at the top and 35 m (116 ft) at the bottom, carrying water 6.4 m (21 ft) deep. Unlined channels lose huge volumes to seepage in sand, so a 1970 revision decided that the entire canal would be lined with concrete tiles. Water leaves the main line through gravity branches, mostly on the northern bank towards the India–Pakistan border: the Suratgarh, Anupgarh and Poogal branches serving Sri Ganganagar district, the Dator and Birsalpur branches in Bikaner, the Charanwal branch in Bikaner and Jaisalmer, and the Shaheed Birbal branch in Jaisalmer. The Rawatsar branch, on the southern bank, serves Hanumangarh.
Below Mohangarh the system continues as two tail canals. The Sagarmal Gopa Branch runs 96 km west to Gunjangarh-Ramgarh, about 70 km north-west of Jaisalmer, and is named after a Jaisalmer freedom fighter who died in 1946. There the water turns south into the Baba Ramdev Sub-branch, which runs 92 km to Gadra Road, a town about 86 km west of Barmer and 6 km from the border near the Munabao crossing. Those two branches are why the full course is quoted as 837 km while most references give the 649 km main line.
Seven lift canals on the southern bank
Land south and east of the main canal sits higher than the water, so gravity cannot reach it. For that side the project built seven lift canals, each starting at a pumping station that raises water out of the main line:
- Chaudhary Kumbha Ram Arya Lift Canal (also called the Gandheli-Sahwa scheme), the longest once its sub-branches are counted, reaching Hanumangarh, Churu and Jhunjhunu districts.
- Kanwar Sen Lift Canal, the longest single lift channel, serving Bikaner and named after the engineer who conceived the project.
- Panna Lal Lift Canal, carrying water through south-central Bikaner to Nagaur district.
- Veer Tejaji Lift Canal, the shortest, in southernmost Bikaner.
- Dr. Karni Singh Lift Canal, serving Phalodi and Jodhpur districts and named after the last Maharaja of Bikaner.
- Guru Jambheshwar Lift Canal, serving Phalodi district.
- Jai Narayan Vyas Lift Canal, serving south-eastern Jaisalmer district.
The lift canals stretch the command area well beyond the strip a gravity canal could reach, as far as Nagaur, Churu, Jhunjhunu and Jodhpur districts. They come with a running cost that the main canal does not have: electricity for pumping, every season.
Kanwar Sain’s plan, the 1960 treaty and two late stages
The idea belongs to Kanwar Sain (1899–1989), a civil engineer from Tohana in present-day Haryana who was chief engineer of Bikaner State and later chaired India’s Central Water and Power Commission. In the late 1940s he estimated that about 2 million hectares (20,000 km²) of desert in Bikaner and the north-western corner of Jaisalmer could be irrigated with stored water from the Punjab rivers.
The water had to be legally India’s first. On 19 September 1960 Jawaharlal Nehru and Pakistan’s president Ayub Khan signed the Indus Waters Treaty in Karachi, a World Bank-mediated deal that gave India the three eastern rivers, the Sutlej, Beas and Ravi, with a combined mean annual flow of about 33 million acre-feet, and gave Pakistan the Indus, Jhelum and Chenab. The Rajasthan Canal plan of the time assumed a share of about 7.6 million acre-feet (9.4 billion m³) of that water.
Building it was slow. Stage I covered the feeder, the first 189 km of main canal from Masitawali to Pugal in Bikaner district and about 2,950 km of distributaries; it was completed in 1983–86, more than 20 years behind schedule, after years of funding shortfalls and allegations of corruption. Stage II added the 256 km of main canal from Pugal to Mohangarh and a distributary network of about 3,600 km, and was finished in 2010, roughly 15 years late. By then the main, feeder and distribution channels together came to about 9,245 km.
What the water changed in Bikaner, Jaisalmer and Barmer
The Thar covers about 264,091 km², roughly 195,091 km² of it in India, and most of it gets less than 500 mm of rain a year, with long droughts in between. Groundwater lies 10–40 m down and is mostly brackish. Yet it is also the most densely settled desert in the world, at about 83 people per km², so a reliable surface supply changes daily life as much as farming. In Jaisalmer district the canal brought irrigation and drinking water to about 6,770 km², and in Barmer to about 37 km². Wheat, cotton and mustard are now grown in parts of this semi-arid country where little could be cultivated before, alongside the drought-resistant millets, pulses and cluster beans of traditional Thar farming.
The gains are uneven. Many question whether the project has reached its full potential, since more land could still be brought under irrigation if more water were available, and seepage from canals into flat, poorly drained ground has caused waterlogging in places: by 1991 P. S. Kavadia had already set out an action plan for the problem of waterlogging in the Indira Gandhi Nahar Project. The canal also redraws who depends on whom. Farms around Bikaner and Jaisalmer now rely on reservoirs in Himachal Pradesh and a barrage in Punjab, hundreds of kilometres upstream, and on a treaty with a neighbouring country for the right to that water.
The next chapter is about supply. After India put the Indus Waters Treaty in abeyance on 23 April 2025, following the Pahalgam attack, plans were announced to link the western rivers to the eastern ones through an Indus–Sutlej link canal ending at the Harike Barrage, with a pre-feasibility study reported to have begun in June 2025. Whether that link is built will largely decide how much more desert the canal can ever reach.
For the landscape the canal was built to tame, read our geography of the Thar Desert; for the dam that stores much of the Sutlej water it depends on, see the Bhakra Dam; and to understand how the 1960 treaty divided the rivers, follow the whole system in our Indus River basin guide.