Environment · 5 Aug 2026

reservoir rule curve Kerala floods

Consider the following statements regarding Kerala's reservoir management following the 2018 floods:

  1. A "rule curve" refers to a pre-set operational guideline specifying safe reservoir water levels through the year, used to guide staggered, pre-emptive dam releases.
  2. The 2018 Kerala floods were substantially worsened by simultaneous, poorly sequenced releases from multiple large dams operating near full capacity.
  3. During the August 2026 rainfall event, all of Kerala's major reservoirs, including the largest ones, released water simultaneously to prevent overflow.
  4. The Chief Minister confirmed that only the smaller Moozhiyar dam released water during the 2026 event, while major reservoirs remained closed.

How many of the above statements are correct?

AOnly one
BOnly two
COnly three
DAll four
This question is based on: Rain toll rises to 18 in Kerala; over 13,000 in relief camps across State
Take this in full test mode → Instructions for 5 Aug 2026
About this question

Why in news

Kerala's 2026 monsoon death toll rose to 18 with over 13,000 people in relief camps, even as the state's major dams stayed shut, raising questions about whether reservoir management reform is being tested or simply hasn't faced its real test yet.

Why for UPSC

This tests precise recall of what actually happened in 2026 versus the 2018 failure it is compared against - a distinction UPSC values in disaster-management current affairs questions rather than vague sympathy-based recall.

Prelims summary

A rule curve guides pre-emptive, staggered dam releases to avoid the simultaneous major-dam openings that worsened Kerala's 2018 floods; in the 2026 event, only the smaller Moozhiyar dam released water.

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