Transboundary river disputes reflect the intersection of ecology, diplomacy and domestic federalism. Discuss with reference to the Ganga Water Treaty.

The India–Bangladesh Ganga Waters Treaty, signed on 12 December 1996 for 30 years, shares lean-season flows at the Farakka Barrage from 1 January to 31 May on a 10-daily basis [1]. Its impending expiry in December 2026 shows that a river treaty is never merely a hydrological formula — it simultaneously engages ecological limits, bilateral diplomacy and Centre–State relations.

Ecological dimension

• The treaty allocates volumes, not river health: the 70,000/75,000 cusec thresholds and Bangladesh's guaranteed 35,000 cusecs assume a stable flow regime [1][2].
• Declining flows, climate variability and sediment dynamics are unaddressed; experts urge governance of "water, energy, biodiversity and sediments" together rather than pure volumetric sharing [3].
• Bihar attributes upstream silt accumulation and altered river morphology to Farakka's operation [4].

Diplomatic dimension

• Water is a barometer of the wider relationship — trade, connectivity and border management [3].
• Technical-level renewal talks announced in June 2024 were disrupted by Bangladesh's political transition, making the Joint Committee of technical experts the main channel for continuity [3].
• Renewal also carries demonstration value for the still-unresolved Teesta question and for India's credibility as an upper riparian.

Federal dimension

• Treaty-making is a Union power under Article 253, so Bihar and West Bengal have a consultative, not decisive, voice [5].
• Bihar's JD(U) has sought non-renewal or renegotiation, citing water security for its population [4].
• The Centre has responded institutionally: Jal Shakti Ministry-led inter-ministerial consultations with stakeholders, with the MEA assuring that Bihar's interests will be factored in [4]. A basin-wide framework would require involving all riparian states [3].

Thus the Ganga Treaty is best read as a three-layered bargain. Renewal should move from a static volumetric formula toward an ecologically informed, basin-scale arrangement with an institutionalised mechanism for state consultation. Such cooperative federalism at home and good-neighbourliness abroad would align the treaty with SDG-6 on sustainable water management and with India's constitutional balance between Union competence and State interests.