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VOL. I · EST. 11.2025 
SatyaDheesh
सत्याधीश
India's Ground Truth Record
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Scientists urge T.N. CM Stalin to withdraw Mamallan Reservoir proposal

GS3Economy · S&T · Environment · Security· Biotechnology & health research· Mains·

Why in news

Scientists urged the Tamil Nadu government to withdraw the Mamallan Reservoir project to protect the Kovalam-Nemmeli backwaters as a lagoonal wetland.

Background

A group of ecologists, hydrologists, ornithologists, and marine biologists submitted a letter to the Tamil Nadu government regarding the Mamallan Reservoir proposal. The scientists argue that the Kovalam-Nemmeli backwaters function as a tidal-marsh ecotone and warned that restricting tidal flow would harm marine biodiversity.

Facts for Prelims

  • PlaceKovalam-Nemmeli backwaters: A tidal-marsh ecotone in Tamil Nadu
  • EnvironmentMamallan Reservoir: A proposed project currently facing opposition from scientists for potential impact on lagoonal wetlands

For Mains

Q. Discuss the ecological implications of large-scale reservoir projects on coastal tidal-marsh ecotones and the importance of wetland conservation in coastal management.

Dimensions to cover in your answer

  • Ecological degradation: Risk of biodiversity loss due to restricted tidal flow in lagoonal wetlands
  • Flood risk management: Unaddressed flooding risks associated with reservoir construction in coastal zones
  • Conservation trade-offs: Balancing infrastructure development with the preservation of tidal-marsh ecotones

Keywords: tidal-marsh ecotone · marine biodiversity · lagoonal wetland · ecological impact · wetland conservation

Full chronology for revision →Read the full news →Report a mistake in this noteSource: The Hindu ↗Also: GS3 · Biodiversity & conservationAlso: GS1 · Places in news / mapping

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