UPSC Darpan

Environment & EcologyGS310 October 2026

Gomti floods Lucknow’s riverfront to an extent unseen since 1982, hitting 25,000 people

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The news

Lucknow, October 9. For over a week the Gomti has submerged parts of Uttar Pradesh’s capital, affecting about 5,000 families, nearly 25,000 people, The Indian Express reports. IIIT Lucknow suspended classes after its substation flooded. Principal Secretary (Irrigation) Anil Garg traced the flood to about 150 mm of rain, against a normal 15 mm, between September 22 and 27 in the upper catchment (Pilibhit, Shahjahanpur, Lakhimpur Kheri, Sitapur), about 100 km upstream; Lucknow’s level rose suddenly on October 7. The Lucknow Development Authority says riverfront inundation on this scale was last seen in 1982, and has sent the State a project report for an embankment up to Naimish in Sitapur. The Congress alleges building was allowed on wetlands and floodplains, the flat land a river spreads over in high flow.

The chain in one line: 150 mm of catchment rain in five days → a flood wave travels 100 km downriver → colonies on the floodplain sit in its path → drains back up → 25,000 hit; embankment proposed

Static syllabus linkage

  1. NDMA’s 2010 guidelines treat urban flooding as distinct from river flooding. The Guidelines on Management of Urban Flooding (2010) recognise that cities flood faster because paved surfaces increase runoff and drains choke. They ask for flood-risk mapping, drainage designed for heavier rain, protection of water bodies and local early warning.
  2. The Disaster Management Act, 2005 runs a chain from the NDMA to the district. It created the NDMA under the Prime Minister, State authorities under Chief Ministers, District authorities chaired by the Collector, and the NDRF. The 2025 amendment lets States set up Urban Disaster Management Authorities in State capitals and municipal-corporation cities, and gives SDRFs statutory backing.

Why UPSC loves this

  1. GS3 “disaster management” meets GS1 “urbanization, their problems and their remedies”. The exam rewards tracing urban floods to planning, not rain alone.

Prelims nuggets

  • The Union Government circulated a Model Bill for Flood Plain Zoning to States in 1975; only a handful enacted it.
  • The Gomti, a rain- and groundwater-fed left-bank tributary of the Ganga, rises in Pilibhit district and joins the Ganga below Varanasi.
  • Under the Disaster Management Act, 2005, the District Disaster Management Authority is chaired by the Collector or District Magistrate.
  • The Sendai Framework for Disaster Risk Reduction (2015–2030) sets seven global targets and four priorities for action.

Analysis

  1. The flood began 100 km away, so it was a warning failure as much as a rain event. Rain ended on September 27, yet Lucknow’s level rose sharply only on October 7: a plains flood wave gives days of notice. That lead time should have triggered evacuation and advance barrage regulation, though no gate can absorb 150 mm over a catchment.
  2. Lens — Development and environment: the riverfront was built on land the river had only lent. Four decades without a big flood invite colonies, malls and stadiums onto a floodplain, and channelised riverfronts push the same water higher. Land in a growing capital is scarce, so the trade-off is real. A thoughtful officer would allow regulated building on the outer floodplain but keep the active floodplain free through notified zoning.
  3. An embankment shifts flood risk; it does not remove it. Embankments confine floodwater, raise levels downstream and invite building behind them, so a breach does greater damage; inside, drains into a high river still back up. The counter-view: a dense city already on the floodplain cannot move, so an embankment with sluices and pumps may be the only practical shield.

Possible Mains question

“Urban floods are less a failure of rainfall than of land-use planning.” Discuss with reference to the recent Gomti floods in Lucknow. (15 marks, 250 words)

Model approach

  1. Directive — Discuss. Explain causes and remedies, then conclude.
  2. Introduction — 25,000 hit; riverfront inundation unseen since 1982. The rain fell 100 km upstream.
  3. Body — building on floodplains and wetlands put people in the river’s path. Value addition: the 1975 Model Bill for Flood Plain Zoning; NDMA’s 2010 guidelines.
  4. Body — drains that cannot empty into a high river turn river floods into city waterlogging. Diagram: river, active floodplain, embankment and a backed-up drain outfall.
  5. Body — warning time existed but was not turned into action. The flood wave took days to arrive.
  6. Conclusion — zone the floodplain, retrofit drains, warn by catchment. Embankments only as a last line.

Administrator's brainstorm

As Lucknow’s District Magistrate, the development authority wants its embankment approved quickly. What do you advise?

I would back protection for dense settlements, subject to a hydrological study of downstream effects and drain outfalls, with sluices and pumps. Alongside, I would have the floodplain mapped and notified against new building, and set up catchment-rainfall warning with the Irrigation Department.