Ganga Water Sharing Treaty Renegotiation: Implications for India-Bangladesh Relations and Transboundary Water Governance

Indian Express - Explained · 27 Feb 2026 · 2 min read
Prelims · International relations Mains · GS2 International relations High relevance

The newly elected Bangladesh Nationalist Party (BNP) government prioritizes renegotiating the 1996 Ganga Water Sharing Treaty before its 2026 expiry, reflecting evolving bilateral dynamics and climate change challenges in transboundary water management.

Key points

Ganga Water Sharing Treaty (1996): Established a 30-year framework for sharing Ganga waters during dry seasons (January-May) with a three-tiered allocation system based on historical flow data, monitored by a Joint Committee and Joint Rivers Commission (JRC).

Farakka Barrage: The 2.6 km-long structure in West Bengal, operational since 1975, diverts Ganga waters to the Hooghly river, historically causing tensions with Bangladesh over reduced flow in the Padma river.

Article II(iii): The treaty's emergency provision mandates immediate consultations if flow at Farakka falls below 50,000 cusecs, based on principles of equity and 'no harm' to either party.

Bangladesh's Demands: Seeks guaranteed 40,000 cusecs flow (February-May), longer treaty duration (beyond 30 years), and enhanced flood data sharing, while India wants additional 30,000-35,000 cusecs for its needs.

[GS3-Environment] Climate change impacts like glacial retreat and erratic monsoons necessitate revising the treaty's flow-sharing mechanisms to address water variability and ecological sustainability.

Political Context: The renegotiation occurs amidst strained India-Bangladesh relations following Sheikh Hasina's ouster and India's suspension of the Indus Waters Treaty, raising concerns about regional water diplomacy.

Teesta River Precedent: The 2011 Teesta water sharing agreement's failure due to West Bengal's opposition highlights federal challenges in India's transboundary water negotiations.

[GS2-Governance] The Joint Rivers Commission's limited success (only 1 formal treaty out of 54 shared rivers) underscores institutional weaknesses in bilateral water governance.

Way Forward: India should adopt a basin-wide management approach incorporating climate resilience, establish permanent technical teams for real-time data sharing, and institutionalize sub-national stakeholder consultations to balance federal and diplomatic interests.

Key terms

Farakka Barrage

A 2.6 km-long dam on the Ganga in West Bengal, operational since 1975, designed to divert water to the Hooghly river for maintaining Kolkata port's navigability. Its geopolitical significance stems from causing water scarcity in Bangladesh's Padma river, triggering the 1976 Farakka Long March and necessitating the 1996 treaty.

Joint Rivers Commission (JRC)

A bilateral India-Bangladesh mechanism established in 1972 under the Indo-Bangladesh Joint Rivers Commission Act to manage 54 shared rivers. Despite its mandate, only the Ganga has a formal treaty, highlighting institutional gaps in transboundary water governance under international law principles.

Cusec (cubic foot per second)

The standard unit for measuring river flow rate in the Ganga Treaty, where 1 cusec = 28.317 liters per second. The treaty's allocation thresholds (50,000-75,000 cusecs) determine water-sharing ratios, making it a critical metric for hydrological diplomacy and conflict resolution.

No Harm Principle

A cornerstone of international water law (Article 7 of UN Watercourses Convention) embedded in the Ganga Treaty's Article II(iii), requiring states to prevent significant harm to co-riparian nations. Its interpretation will shape treaty renegotiations amid climate change impacts on river flows.