The idea was simple in concept and staggering in execution: divert water from Punjab's rivers into Rajasthan's desert. Planning began in the 1950s, and construction started at the Harike Barrage in Firozpur district, where the Sutlej and Beas rivers converge. From there, the Rajasthan Feeder Canal carries water southeast to Masitawali in Hanumangarh district, where the main canal begins its 445-kilometer journey deeper into the desert. The canal was planned to be 140 feet wide at the top and 116 feet at the bottom, with a water depth of 21 feet. Stage I, connecting Harike to Pugal in Bikaner district, was supposed to be finished by the early 1960s. It was completed in 1983, more than twenty years behind schedule, plagued by financial shortfalls, bureaucratic neglect, and corruption. Stage II, extending the canal to Mohangarh in Jaisalmer and adding 3,600 kilometers of distributary channels, was not finished until 2010. In total, the system spans over 9,245 kilometers of main, feeder, and distribution canals.

What makes this canal unusual is not just its scale but its route. Research by India's space agency ISRO and the Oil and Natural Gas Corporation confirmed that the Indira Gandhi Canal follows the Ghaggar paleochannel, one of the dried-up courses of the ancient Sarasvati River. Along its path lie numerous archaeological sites of the Indus Valley Civilisation, silent testimony to a time when this landscape was green and navigable. When Indira Gandhi inaugurated the canal in 1980, an inscription on its bank called it the "Saraswati Rupa Rajasthan Canal" -- the canal in the form of the Sarasvati. The name has persisted among locals who see the waterway as a kind of resurrection. The natural gradient that the lost river carved over millennia is what allows the canal to flow without pumps, a geological inheritance that saves enormous energy costs and keeps the system remarkably efficient.

Before the canal arrived, the Thar was one of the most sparsely inhabited deserts in the world. Villages depended on erratic monsoon rains and deep wells that often ran dry. The canal changed the ecology of entire districts. In Hanumangarh and Sri Ganganagar, formerly barren land now produces wheat, mustard, and cotton. Groves of trees line the canal banks where only scrub once grew. But the transformation has brought its own problems. Waterlogging in Stage I areas became severe, turning irrigated fields into saline marshes. The concrete-tile lining added during Stage II was an attempt to reduce seepage, but the damage in earlier sections had already been done. Managing this canal is a perpetual balancing act between the promise of abundance and the consequences of introducing water into a landscape that evolved without it.

The canal was originally called the Rajasthan Canal. On 2 November 1984, following the assassination of Prime Minister Indira Gandhi by her own bodyguards, it was renamed in her honor. The renaming was immediate and political, linking the infrastructure project to the leader who had championed it. Yet the canal's history is inseparable from the turbulence of that era. Gandhi had ordered Operation Blue Star just months earlier, a military assault on the Golden Temple complex in Amritsar that deeply wounded the Sikh community. The canal that bears her name draws its water from rivers that flow through Punjab, the heartland of that community. For some, the canal is a triumph of engineering and a gift of life to the desert. For others, its name carries a weight that engineering alone cannot resolve.

The Indira Gandhi Canal is not a finished project so much as an evolving system. Multiple Indian states are now collaborating to map and revive the full paleochannel of the ancient Sarasvati, from its tributary origins in Uttarakhand and Himachal Pradesh through Haryana, Punjab, and Rajasthan, all the way to the Great Rann of Kutch in Gujarat. A pre-feasibility study for the new Indus-Sutlej Link Canal, a 113-kilometer connection that would redistribute water to Jammu and Kashmir, Punjab, Haryana, and Rajasthan, began in June 2025. The ambition is vast: not merely irrigation, but flood control, religious tourism along the ancient river's path, and perhaps the symbolic completion of something that began when Vedic poets first sang of a mighty river flowing to the sea.