The Ganga is not merely a river flowing across political boundaries. For millions of people in the Gangetic plains, it is a source of agriculture, drinking water, livelihoods and economic activity. Yet the management of its waters has increasingly become a matter of competing regional interests.
As the 1996 India-Bangladesh Ganga Water Sharing Treaty approaches the end of its 30-year term in December 2026, a new domestic dimension has emerged strongly: Bihar wants its concerns over the Farakka system to be addressed before any renewal.
The debate therefore goes beyond India and Bangladesh. It raises a fundamental question: Can a water-sharing arrangement negotiated three decades ago adequately address the needs of today’s river basin?
What is the Ganga Water Treaty?
The 1996 treaty established a framework for sharing Ganga waters at Farakka during the lean season, from January 1 to May 31. Water availability is assessed in 10-day periods and divided according to a formula specified in the treaty.
The treaty was designed to remain in force for 30 years and is renewable by mutual consent. A Joint Committee involving representatives of both countries monitors the implementation of the arrangement.
At the time, the agreement represented an important attempt to move India-Bangladesh water relations from recurring disputes towards a predictable institutional mechanism.
But rivers do not remain static for 30 years.
Why has Bihar raised objections?
Bihar’s argument is that discussions about the Ganga cannot focus exclusively on the quantity of water eventually released downstream of Farakka. The consequences of the barrage and downstream water management are also felt upstream within Bihar.
State leaders have particularly highlighted concerns relating to silt accumulation, flooding, irrigation, agriculture, drinking water and industrial requirements.
One of the major concerns is the changing behaviour of the river.
The Ganga carries enormous quantities of sediment. Changes in river flow and sediment movement can influence the river’s morphology, drainage capacity and flood behaviour. Bihar, already highly vulnerable to flooding, argues that these consequences must be incorporated into the future water-management framework.
This is why the Farakka question has gradually transformed from a simple water-allocation issue into a wider question of river-basin management.
The “water versus flood” paradox
At first glance, Bihar’s concerns may appear contradictory.
Why would a state with substantial water resources complain about water scarcity while simultaneously facing devastating floods?
The answer lies in the uneven distribution of water across time and space.
During the monsoon, enormous volumes of water can enter the Ganga system, contributing to flooding. During the dry season, the availability of usable water can fall sharply, creating pressure on irrigation, drinking water and other economic activities.
Thus, the problem is not simply whether Bihar has “enough water”. It is whether the river’s flow, sediment and storage are being managed in a way that matches the state’s seasonal requirements.
This makes the Farakka debate a classic example of the challenges of integrated river-basin management.
Why the 1996 framework is being questioned
The treaty was negotiated in a very different political and environmental context.
Three decades later, several conditions have changed:
• Climate change is altering rainfall and river-flow patterns.
• Agricultural and industrial water demand has increased.
• Population and urbanisation have expanded.
• Extreme floods and drought-like conditions are becoming more important policy concerns.
• River morphology and sedimentation have evolved.
• Water security is increasingly being viewed through an ecological as well as economic lens.
The original treaty relied heavily on historical hydrological assumptions. Contemporary assessments have argued that changing hydrology and climate uncertainty make a simple continuation of the old framework inadequate.
This does not necessarily mean that the treaty itself has become irrelevant. Rather, the conditions surrounding it have changed enough to justify a comprehensive review.
Why scrapping the treaty is complicated
Bihar’s demand for non-renewal presents a significant challenge for New Delhi.
The Ganga is a transboundary river, and Bangladesh is the downstream country. Water-sharing arrangements therefore form an important part of India’s neighbourhood diplomacy.
The 1996 treaty has also provided a predictable mechanism for managing lean-season flows. Simply abandoning it could create uncertainty in India-Bangladesh relations and potentially complicate negotiations over other shared rivers.
There is another important dimension: India’s federal structure.
Foreign affairs and treaty-making are Union responsibilities, but water is deeply connected to states’ economic, agricultural and environmental interests. A treaty negotiated internationally can therefore have consequences that are felt most directly by states such as Bihar and West Bengal.
The Centre consequently faces a difficult balancing act:
Bangladesh’s legitimate downstream concerns + Bihar’s upstream concerns + West Bengal’s interests + India’s diplomatic objectives.
The Farakka question is bigger than Farakka
The most important lesson from the current debate is that managing one point on a river may not be enough.
The Ganga basin extends across a vast geographical area, while the river itself originates in the Himalayan system and interacts with several tributaries and regions before entering Bangladesh.
A sustainable arrangement therefore needs to consider the entire river basin, rather than treating Farakka as an isolated point of water distribution.
It should involve better hydrological data, sediment management, flood forecasting, groundwater considerations, ecological flows and climate projections.
The debate could also eventually encourage greater consideration of Nepal’s role in the wider Ganga basin because important tributaries of the river system originate there.
What should a future agreement look like?
If the treaty is renegotiated, India has an opportunity to move from a fixed allocation model towards adaptive water governance.
A future framework could include:
1. Updated hydrological data
Water-sharing formulas should be based on contemporary river-flow data rather than relying primarily on historical assumptions.
2. Climate resilience
The agreement should contain mechanisms that can respond to prolonged droughts, extreme floods and changing rainfall patterns.
3. Bihar’s concerns
The requirements of upstream states, particularly regarding irrigation, drinking water, industrial development, flooding and sedimentation, should become part of the negotiating framework.
4. Ecological sustainability
Water cannot be treated only as a commodity. Adequate ecological flows are necessary for wetlands, fisheries, agriculture and downstream ecosystems.
5. Basin-wide cooperation
Instead of looking only at the Farakka Barrage, India and Bangladesh should strengthen cooperation across the wider Ganga basin.
6. Stronger institutional mechanisms
Regular exchange of hydrological data, joint monitoring and scientific assessments could reduce political disagreements and improve trust.
The larger federalism question
The Farakka controversy also highlights an often-overlooked aspect of Indian federalism.
International agreements may be signed by the Union government, but their consequences are frequently experienced by states.
This raises an important governance principle:
Foreign policy over shared rivers cannot be completely separated from domestic water security.
If Bihar believes that the existing arrangement imposes costs on the state, its concerns cannot simply be treated as an internal political disagreement. They have implications for India’s negotiating position itself.
The challenge for the Union government is therefore to create sufficient space for state-level concerns while maintaining India’s ability to negotiate effectively with Bangladesh.
A moment for a new water diplomacy
The approaching expiry of the 1996 framework should not necessarily be viewed as a choice between renewal and rejection.
There is a third possibility: reimagination.
India and Bangladesh can preserve the spirit of cooperation while updating the substance of the agreement. The objective should not be to decide who gets “more” water, but to develop a system in which the river basin itself becomes the unit of cooperation.
For Bihar, that would mean addressing flooding, sedimentation and water availability.
For Bangladesh, it would mean predictable and adequate downstream flows.
For India, it would mean protecting both domestic water security and a stable relationship with an important neighbour.
And for the Ganga itself, it would mean recognising that a river is not simply a number measured in cusecs.
Conclusion
The Farakka debate is ultimately a test of India’s ability to reconcile federal interests, neighbourhood diplomacy and ecological realities.
The 1996 treaty belonged to a different era. The question before India and Bangladesh in 2026 is not merely whether to extend it, but whether they can build a more flexible and scientifically grounded framework for the decades ahead.
Bihar’s objections have brought an important issue to the forefront: a transboundary river agreement cannot remain sustainable if the concerns of the people living within the river basin are left outside the conversation.
The future of the Ganga may therefore depend not on dividing its waters more efficiently, but on learning to manage the river as one interconnected system.
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