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6 August 2026

Greater Chennai Corporation lake restoration projects

The topic provides a practical case study on urban climate resilience and the implementation challenges of sponge city models, which is useful context for GS3 environmental conservation and GS2 policy implementation questions.

1 min read Day 1 of 2 2 questions 1 prelims

Notes

  • Greater Chennai Corporation (GCC) is shifting focus from creating new sponge parks to restoring existing lakes for rainwater management.
  • 30 out of 32 planned sponge parks have been completed by the GCC over the last two years.
  • GCC officials report limited effectiveness of sponge parks due to Chennai's predominantly clayey soil, which restricts groundwater percolation.
  • Restoration of lakes involves strengthening natural bunds, creating walking paths, and implementing safety measures.
  • Concerns raised regarding the maintenance of existing sponge parks include moss build-up and the need for better fencing.
  • Maintenance of sponge parks is currently handled by the GCC using manpower from self-help groups.
  • The 2025-26 State Budget announced seven climate-resilient sponge parks across the Chennai Metropolitan Area at a cost of ₹88 crore.
  • Proposed sponge parks at Thoraipakkam and Padi (costing ₹9.45 crore) have seen no progress.

Part of a longer story

This is day 1 of 2 in Greater Chennai Corporation lake restoration projects, which has been running since 6 August 2026. Reading it whole is usually worth more than reading today alone — the exam asks how something developed.

Questions

  1. Evaluate the efficacy of 'sponge city' interventions in urban flood mitigation, particularly in regions with low soil permeability. Discuss the challenges in maintaining such decentralized urban infrastructure. 150 words
    Attempt this — 150 words in 8 min
    0 / 150 words 8:00
  2. Urban water management in India requires a shift from artificial interventions to nature-based solutions. In the context of Chennai's lake restoration efforts, analyze the importance of reviving traditional water bodies over engineered urban parks for long-term climate resilience. 250 words
    Attempt this — 250 words in 11 min
    0 / 250 words 11:00

Prelims

  1. What is the primary reason cited by the Greater Chennai Corporation for the limited effectiveness of sponge parks in the city?

Syllabus

Topics

Sources

250words.in · https://250words.in/daily/2026-08-06/greater-chennai-corporation-lake-restoration-projects