Indus Waters Treaty: A Framework for India-Pakistan Water Cooperation

The Indus river system has long been the lifeline of the northwestern subcontinent, sustaining agriculture, drinking water, and livelihoods for hundreds of millions of people. When the subcontinent was partitioned in 1947, this shared river network suddenly straddled an international border, creating a problem with no easy answer: how do two hostile neighbours divide the waters of rivers that ignore political boundaries? The answer came in the form of the Indus Waters Treaty, signed in 1960 after nearly a decade of difficult negotiations. For over six decades it survived wars, military standoffs, and deep mutual distrust, earning a reputation as one of the world’s most durable water-sharing agreements. Yet recent years have tested it like never before. This post explains how the treaty works, why it has lasted so long, and why its future is now genuinely uncertain.

The historical background 🔗

The roots of the dispute lie directly in Partition. The boundary line drawn in 1947 cut across the Indus basin in a particularly awkward way. India ended up controlling the headworks and the upper reaches of several canals, while much of the irrigated farmland that depended on those canals lay in Pakistan. This meant that Pakistan, as the downstream country, was anxious about its water security from the very start.

Tensions boiled over in 1948 when water flow into some Pakistani canals was briefly interrupted, deepening fears of water insecurity. Both countries soon realised that the dispute was too technical and too dangerous to be resolved through ordinary diplomacy alone. In 1951, both sides approached the World Bank for funding for irrigation projects, and the Bank, then led by President Eugene Black, offered to mediate the water-sharing dispute itself.

What followed was a marathon of negotiations involving engineers, diplomats, and legal experts. After roughly nine years of back-and-forth, the treaty was finally signed in Karachi on 19 September 1960 by Prime Minister Jawaharlal Nehru, Pakistani President Mohammad Ayub Khan, and W. A. B. Iliff representing the World Bank.

How the treaty divides the rivers 🔗

The core of the treaty is a simple geographical split of the six main rivers in the Indus system. Rather than trying to share each river drop-by-drop, the negotiators allocated whole rivers to each country. This was a pragmatic choice that reduced the need for constant cooperation between two distrustful neighbours.

The eastern rivers 🔗

The three eastern rivers-the Ravi, the Beas, and the Sutlej-were allocated to India for unrestricted use. India is entitled to use these waters almost entirely for irrigation, hydropower, and other needs. This allocation gave India full control over the rivers that flow most directly through its territory.

The western rivers 🔗

The three western rivers-the Indus, the Jhelum, and the Chenab-were assigned primarily to Pakistan. These carry the bulk of the basin’s water. However, the allocation is not absolute. India, as the upstream country, is permitted certain limited uses, including non-consumptive uses such as run-of-the-river hydropower, subject to strict design rules that prevent significant water storage or alteration of flow.

This distinction between full control of the eastern rivers and limited rights on the western rivers sits at the heart of nearly every dispute that has arisen since 1960. Because the western rivers carry far more water, the design of any Indian project on them is scrutinised closely by Pakistan.

Building the infrastructure 🔗

Dividing the rivers created a practical problem. Much of the irrigation network in Pakistan had historically drawn water from rivers now assigned to India. To make the new arrangement workable, the treaty provided for the funding and construction of a large network of dams, link canals, barrages, and tube wells. Notable projects included the Tarbela Dam on the Indus and the Mangla Dam on the Jhelum.

These structures were designed to deliver water to Pakistan in roughly the same quantities it had previously received from the eastern rivers, now reserved for India. Much of the financing was contributed by member countries of the World Bank, which made the entire settlement financially viable. Without this infrastructure component, the legal division of rivers would have been impossible to implement on the ground.

The dispute resolution mechanism 🔗

One reason the treaty proved so durable is its carefully layered system for handling disagreements. The drafters knew that disputes were inevitable, so they built a structured three-tiered mechanism under Article IX of the treaty. Each tier handles a different level of seriousness.

The Permanent Indus Commission 🔗

The first tier is the Permanent Indus Commission (PIC), a bilateral body with one commissioner from each country. It serves as the everyday channel for communication, data exchange, and resolving routine “questions.” The commissioners are required to meet at least once a year, alternating between the two countries. For most of the treaty’s life, this commission quietly resolved technical issues without escalation.

The Neutral Expert 🔗

When the commission cannot settle a technical “difference,” either party can ask the World Bank to appoint a Neutral Expert. This is the second tier, and it deals specifically with engineering and design questions. For example, in the long-running Baglihar Dam dispute, a neutral expert was brought in and ultimately delivered a verdict that resolved the matter.

The Court of Arbitration 🔗

The third and highest tier is the Court of Arbitration, reserved for unresolved “disputes” of a legal or treaty-interpretation nature. Its decisions are binding. This mechanism produced a final award in the Kishanganga case in 2013. The graded structure-from bilateral talks, to a technical expert, to formal arbitration-was meant to keep most disagreements from ever reaching the most adversarial stage.

Why the treaty endured for so long 🔗

The treaty’s resilience is genuinely remarkable. India and Pakistan fought full-scale wars in 1965 and 1971, clashed at Kargil in 1999, and endured countless smaller crises-yet the treaty held throughout. Water cooperation continued even as broader diplomatic ties collapsed.

Several features explain this durability. The clean geographical division reduced the need for constant trust. The World Bank’s role as a guarantor and signatory gave the agreement international weight. And the layered dispute mechanism provided pressure valves that prevented disagreements from escalating into treaty-ending crises. The agreement is widely regarded as one of the most successful international water treaties, having provided a framework for irrigation and hydropower development for more than half a century.

Growing disputes over dams 🔗

The relative calm began to fray over hydropower projects on the western rivers. The two flashpoints have been the Kishanganga project, on a tributary of the Jhelum, and the Ratle project, on the Chenab. Pakistan objects to the design features of both, arguing they could allow India to manipulate water flows in ways the treaty does not permit. India maintains the projects are legitimate run-of-the-river facilities allowed under the treaty.

These disagreements led to a procedural deadlock. In 2016 Pakistan sought a Court of Arbitration while India requested a Neutral Expert for the same projects. Because the treaty does not provide for parallel proceedings on the same issue, this created a serious legal tangle. By 2022 the World Bank had appointed both a neutral expert and a court of arbitration, and India rejected the court’s competence to hear the matter while continuing to participate in the neutral expert process.

Moves toward modification 🔗

Frustration with these recurring disputes pushed India toward seeking changes to the treaty itself. In 2023, India invoked Article XII(3) to formally request a bilateral modification, citing changed circumstances such as climate change, demographic pressures, and clean energy needs. Pakistan refused the request. India followed up in 2024 with a further formal notice arguing the treaty was outdated, and it also called off meetings of the Permanent Indus Commission. The cooperative spirit that had defined the treaty for decades was visibly eroding.

The 2025 suspension and current status 🔗

The most dramatic rupture came in 2025. Following a deadly terror attack on civilians at Pahalgam in April 2025, India announced that it would hold the treaty “in abeyance”-the first time in the treaty’s history that one party suspended its participation. The Indian government linked the move directly to national security, stating that the treaty would remain suspended until Pakistan credibly and irrevocably ends its support for cross-border terrorism.

The legal and diplomatic fallout has been significant. The Court of Arbitration held that the treaty does not provide for unilateral abeyance and reaffirmed its own jurisdiction, while India rejected the court as “illegal” and boycotted the proceedings. In practical terms, analysts note the immediate impact on water flows is limited, because India currently lacks the infrastructure to store or divert large volumes from the western rivers. India has, however, accelerated long-pending hydropower projects in Jammu and Kashmir. As of 2026, India continues to maintain that the treaty will stay in abeyance, framing the issue as one where, in its words, talks and terror cannot go together.

The debate over the future 🔗

The treaty now sits at a genuine crossroads, and the debate within India and among water experts is sharply divided. Some argue for outright revision or even abrogation, viewing the 1960 framework as a relic that gives away too much water and provides too little flexibility for modern needs. Others caution that walking away entirely could damage India’s reputation as a responsible upper-riparian state and set a worrying precedent, especially since India is itself a downstream country with respect to rivers originating in China.

A third camp favours optimization-fully using India’s existing entitlements on both the eastern and western rivers, accelerating permitted hydropower, and pushing for a negotiated update rather than collapse. Many independent analysts argue that with mounting water stress on both sides, there is ultimately no alternative to some form of cooperation, whether through reviving the existing treaty or building a new framework altogether.

What do you think? Should a sixty-year-old water-sharing treaty be renegotiated to reflect twenty-first-century realities like climate change and energy demand, or does its very rigidity explain why it survived so many wars? And is it wise to link a humanitarian resource like water to security disputes, given that millions of ordinary people depend on these rivers regardless of politics?

References

1. https://www.britannica.com/event/Indus-Waters-Treaty
2. https://timeline.worldbank.org/en/timeline/eventdetail/1716
3. https://zeenews.india.com/india/as-indus-waters-treaty-remains-in-abeyance-india-s-water-war-on-pakistan-continues-with-rs-2600-crore-chenab-river-projects-3049490.html
4. https://www.internationalwaterlaw.org/blog/2025/06/16/a-treaty-on-the-brink-indias-suspension-of-the-iwt-and-the-case-for-cooperative-transboundary-water-governance/
5. https://www.worldbank.org/en/region/sar/brief/fact-sheet-the-indus-waters-treaty-1960-and-the-world-bank
6. https://www.tribuneindia.com/news/india/indus-waters-treaty-to-remain-in-abeyance-until-pakistan-ends-terror-support-india/
7. https://www.icwa.in/show_content.php?lang=1&level=3&ls_id=13109&lid=8004
8. https://www.clingendael.org/publication/indus-water-treaty-2025-pause-cooperation-not-end