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Indus Waters Treaty: Study Shows 20% Rainfall Decline in Eastern Rivers (Ravi, Beas, Sutlej) Since 1951 - Climate Change Impact

Target:UPSC GS-IIMPSCTeachingSSC GAPrelims HighMains HighStatic GK Link
09 Jul 2026
~2 min
Source: Indian Express
Key Data:20% decline in eastern rivers6% decline in western rivers34% decline in Pong dam inflows1951-20241951-2020
Bodies:IIT-Gandhinagar
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What This Article Covers

1.First-of-its-kind study by IIT-Gandhinagar shows 20% precipitation decline in eastern Indus rivers (Ravi, Beas, Sutlej) from 1951-2024, with only 6% non-significant decline in western rivers.

2.Groundwater depletion significant in Sutlej and Ravi sub-basins; Pong dam reservoir inflows declined by 34% (1951-2020), while Mangla and Tarbela dams in Pakistan stable.

3.Study supports India's contention that climate change has fundamentally altered water availability, necessitating modification of the 1960 Indus Waters Treaty, currently in abeyance.

The Big Picture
Prelims · HighMains · High

A new study reveals a 20% decline in rainfall in the catchment areas of eastern Indus rivers (Ravi, Beas, Sutlej) since 1951, while western rivers remain stable. This provides data-based evidence for India's argument to renegotiate the Indus Waters Treaty with Pakistan, which has been put in abeyance after the Pahalgam terror attack.

Exam Lens

Quick Exam Facts From News

Rainfall decline in eastern rivers (1951-2024)20%
Rainfall decline in western rivers (same period)6% (statistically non-significant)
Decline in annual inflow at Pong Dam reservoir (1951-2020)~34%
Major dams in Pakistan with stable inflowsMangla and Tarbela

1-Minute Revision

  • ›Rainfall decline in eastern rivers (1951-2024): 20%
  • ›Rainfall decline in western rivers (same period): 6% (statistically non-significant)
  • ›Target this Data: 20% decline in precipitation in eastern Indus rivers (Ravi, Beas, Sutlej) from 1951-2024.
  • ›Target this Nodal Body: IIT-Gandhinagar (study by Prof. Vimal Mishra).
  • ›Target this Legal Point: Indus Waters Treaty (1960) - currently in abeyance by India.

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Q1Static LinkageEasy

Which institute conducted the study on rainfall decline in the Indus river system?

Q2Statement-basedHard

Consider the following statements:

1. The study found a 20% decline in precipitation in the catchment areas of eastern Indus rivers (Ravi, Beas, Sutlej) between 1951 and 2024.

2. The study found a significant decline of 20% in precipitation in western rivers (Indus, Jhelum, Chenab) over the same period.

3. The study was conducted by Vimal Mishra and Urmin Vegad from IIT-Gandhinagar.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the study, what was the percentage decline in annual inflow at Pong dam reservoir between 1951 and 2020?

Q4Application/ImpactMedium

What is the primary implication of the study for the Indus Waters Treaty?

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