India Explained
ImplementedJDH. D. Deve Gowda, coalition government

Ganga Water Sharing Treaty with Bangladesh

A 30-year treaty signed in December 1996 sharing Ganga water at Farakka in the January-May dry season, replacing earlier short-term arrangements. It is due for renewal in December 2026.

Neighbourhood

Facts

  • The treaty was signed in New Delhi on 12 December 1996 by Prime Ministers H. D. Deve Gowda and Sheikh Hasina, for 30 years [1][2].
  • It covers sharing of Ganga water at Farakka from 1 January to 31 May each year, using 10-day periods and a formula in Annexure I [1][3].
  • Under the formula, flows of 70,000 cusecs or less at Farakka are shared equally; between 70,000 and 75,000 cusecs Bangladesh receives 35,000 cusecs; above 75,000 cusecs India receives 40,000 cusecs [3][4].
  • Each country is guaranteed 35,000 cusecs in alternate 10-day periods between early March and 10 May [1][2].
  • Before the treaty, a 1977 agreement and later memoranda (1982, 1985) gave temporary arrangements; commentators report no comprehensive framework after 1988 until 1996 [3].
  • The treaty expires on 12 December 2026, and its text contains a review provision and a clause on sharing other common rivers [2].

Why

Reasons given by those who did it

  • The governments aimed to end a long-running difference over entitlement to dry-season flows at Farakka and to set a predictable formula [2].
  • The treaty text provides for consultation based on equity, fair play and no harm to either party when flow falls below 50,000 cusecs [1].

Criticism of that reasoning

  • Commentators have noted the treaty has no unconditional minimum-guarantee clause and does not account for changing hydrology [4].

Benefits and concerns

Benefits (2)

  • Replaced ad hoc arrangements with a long-term, formula-based schedule and a defined joint mechanism.A 30-year treaty with 10-day sharing periods and a review clause replaced arrangements that lapsed in 1988 [1][3].
  • Gave Bangladesh a stated guaranteed volume in the driest weeks while recognising India's Farakka withdrawals.A 35,000 cusec guarantee for each country in alternate 10-day periods (March-May) [1][2].

Concerns (2)

  • Bangladesh has often not received its stated share in critical dry periods.Studies cited by ORF report that between 1997 and 2016 Bangladesh did not receive its guaranteed share in critical dry periods about 65% of the time [2].
  • The treaty is time-limited and does not cover the full year, other rivers or ecological flows, leaving the renewal question open.It covers January-May only and expires on 12 December 2026; ORF proposes a basin-wide approach instead [2].

Evidence points

+3.5
points, mean of two scorers (scale −25 to +25)
+2 to +5
range between the two scorers' totals
Medium confidence
1 criterion where scorers differ
ReachHow many people did the action materially affect?
Mean +2.0A +2B +2
Outcome evidenceDo official or independent data show the intended result (or its opposite), compared with the era baseline and peers?
Mean 0.0A 0B 0
Cost and sustainabilityIs the fiscal cost proportionate, and is the effect durable?
Mean +1.0A +1B +1
Process and rightsWas it made with debate, consultation and legal soundness, and did it respect rights and court rulings?
Mean +0.5A +1B 0
DeliveryWas it implemented as announced, on time and at scale?
Mean 0.0A +1B −1Scorers differ

Positive meanNegative meanScorer AScorer B

Scorer A. Formula-based framework replaced lapsed ad hoc arrangements, yet Bangladesh reportedly missed its guaranteed share in critical dry periods about 65% of the time.

Scorer B. Replaced ad hoc arrangements with a formula, but Bangladesh reportedly missed its guaranteed share in critical periods about 65% of the time.

Context used when scoring

Era baseline
The 1977 agreement and the 1982 and 1985 memoranda had lapsed by 1988, and there was no agreed sharing framework for the following eight years.
Lag before outcomes show
3 years
Uncertainty
Medium confidence. Scorer totals are +5 and +2. How uncertainty is shown.

In depth

The Farakka Barrage, commissioned in 1975, diverts Ganga water towards the Hooghly. Bangladesh, the lower riparian, objected to reduced dry-season flows, and talks produced a 1977 agreement and short memoranda in the 1980s. After these lapsed, the 1996 treaty set a 30-year framework.

The treaty does not give a single fixed share. It sets bands of flow at Farakka, with an equal split at low flows and fixed volumes at higher flows, plus a guaranteed 35,000 cusecs to each side in alternate 10-day periods in the driest part of the season. An emergency clause calls for consultation when flow is below 50,000 cusecs.

Supporters see a durable, rules-based arrangement. Critics, including analysts writing for ORF, say actual deliveries to Bangladesh in critical periods fell short in many years, that the treaty lacks an unconditional minimum guarantee, and that it addresses volume but not ecological flow. Several secondary sources differ on the exact start date of the guarantee window and on the 1977 terms, so the treaty text should be checked for exact wording. Renewal or replacement is due by December 2026.

Sources

  1. Ganges Water Sharing Treaty 1996 (treaty text)
    Asian Development Bank legal portal (copy of treaty text)Primary
  2. Flow with the times: The Farakka water treaty
    Observer Research FoundationAcademic

Last reviewed .Report an error orchallenge a score.

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