In this article:
- How a 1960 treaty divides six rivers between India and Pakistan
- Why the agreement is struggling to adapt to changing conditions
- Two possible futures for the treaty and what they mean for shared rivers worldwide
Water binds societies together, but when it becomes scarce or politicized, it can also create friction. Around the world, shared river basins are under increasing stress as climate change alters hydrological regimes, populations grow, and competing demands from agriculture, energy, and cities intensify.
From the over-allocated Colorado River in North America, to the geopolitically charged Nile Basin in Africa, to the rapidly developing Mekong in Southeast Asia, transboundary rivers are emerging as critical fault lines in global water governance. The Indus River System, shared primarily by India and Pakistan, stands as one of the most consequential contemporary examples of how international water cooperation can endure, and how fragile it can become under modern pressures.
What the Indus Water Treaty does and why it has endured
The Indus Water Treaty, signed in 1960 with World Bank mediation, governs six rivers in the Indus River System that support the livelihoods, irrigation, energy generation, industries, cities, and ecosystems of nearly 300 million people across India and Pakistan. The treaty allocates the eastern rivers largely to India and the western rivers largely to Pakistan, creating one of the most rigid water-sharing arrangements in the world.
For decades, this simple structure helped insulate water cooperation from war and diplomatic crises. However, that insulation is now cracking under the current social, environmental, and political conditions. In 2025, India placed the treaty on hold following a major security incident, triggering a sharp diplomatic escalation with Pakistan.
Why the Indus Water Treaty is under pressure
The challenges facing the Indus are not unique. Climate change is intensifying floods, droughts, and seasonal and annual water availability trends and patterns. Water demands are rising across agriculture, energy, and cities. Meanwhile, treaties designed for a mid-20th century climate and society struggle to address these contemporary challenges.
Often characterized as a “divorce settlement,” the Indus Water Treaty has limited avenues to manage shared risks such as floods, ecosystem degradation, or long-term climate shifts. As political distrust grows, water increasingly becomes a strategic tool rather than a shared resource.
Similar dynamics are visible in debates over shared water resources on the Colorado River, dam development on the Nile, and upstream infrastructure in the Mekong Basin. Although the Indus Water Treaty survived these challenges over the decades, it didn’t evolve through them. At present, India’s recent declaration to place the treaty in abeyance after a deadly attack on civilians in the Jammu and Kashmir region casts doubt on the treaty’s existence and role in the future.
Two possible futures for the Indus Water Treaty
The current suspension of the treaty highlights a critical tipping point that creates significant uncertainty regarding the future of the Indus Water Treaty, regional water governance, and their implications for transboundary rivers worldwide.
1. Conflict and fragmentation
If the current state of suspension persists, cooperation will continue to erode. The absence of data sharing and joint planning will increase uncertainty, heighten disaster risks, and deepen political instability. The immense uncertainty in planning water resources would impact the agricultural sector and would further contribute to water quality deterioration, salinity, and groundwater overpumping.
Over time, unilateral infrastructure development and mistrust due to the lack of formal legislation could transform water stress into broader security crises. Furthermore, these instabilities would cascade into increased challenges in the governance of other major transboundary rivers in South Asia, such as the neighboring Ganga and Brahmaputra.
2. Cooperation and reform
Alternatively, the current crisis could be optimistically used as a catalyst for reform. Updating the Indus Water Treaty to include climate adaptation, flood risk management, ecosystem protection, and shared data could realign the treaty with 21st century realities. The reform would be useful in informed planning and management of water resources and would contribute to a positive change in the livelihood of people and ecosystems in the Indus basin.
Long-term joint management of key infrastructure would also facilitate dialogue, with the treaty serving as a tool to enhance cooperation. Comparable efforts, such as the modernization of energy sharing under the Columbia River Treaty between the U.S. and Canada, or cooperative frameworks like the Shared Vision Program under the Nile Basin Initiative, show that even deeply contested rivers can evolve toward shared benefits, and timely evolution can support cooperation across sectors beyond water.
What the Indus case reveals about global water risks
The Indus River and its tributaries are critically important for water, energy and food security, regional peace and stability in South Asia and globally. It is already a significantly strained system due to climatic stressors, societal pressures, economic demands, and ineffective governance, now standing at a critical juncture. With the treaty now suspended, the Indus River dispute is not just a regional issue; it is a preview of global water politics in a warming world. As glaciers retreat, monsoons shift, and extremes intensify, water scarcity will increasingly intersect with questions of power, equity, and governance.
The Indus Water Treaty offers a cautionary lesson for shared rivers worldwide from the Colorado to the Nile to the Mekong, where outdated agreements and declining cooperation risk transforming water stress into broader political crises. It reminds us that water treaties are not merely sharing agreements, but political institutions that must evolve to create shared solutions. Ultimately, the future of the Indus and many other transboundary rivers will depend on whether the countries that share them choose cooperation or pursue unilateral control.
This article is based on research by Tejal Shirsat, Lara Fowler, and Christopher Scott, “Past, present and future of the Indus Water Treaty: implications for transboundary water governance challenges and modernization prospects,” published in Water Security.
Tejal Shirsat is a doctoral candidate in the Environmental Policy Goddard Chair Group, with expertise in high-mountain hydrology, water resources management, climate change impact assessment, water security, and transboundary rivers.
Kausik Ghosh is a post-doctoral scholar in the Department of Ecosystem Science and Management working on adaptive water management in transboundary river basins. His interdisciplinary research spans river geomorphology, hydrology, sedimentology, climate change adaptation, water governance, ecosystem services, and the water-energy-food nexus.
Christopher Scott is an IEE faculty member, the Maurice K. Goddard Chair of Forestry and Environmental Conservation, and a professor of ecosystem science and management. His research, extension, and engagement focus on natural resource conservation and policy, climate-smart forestry, watershed science and management, the water-energy-food nexus, interstate and transboundary waters, climate adaptation and resilience, and energy transitions, with emphasis on the Appalachians, Alleghenies, and international efforts in the Andes and Himalayas.
Christopher Scott
