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NGT Seeks Answers on Bihar Wetland's Decline
26 Jul
Summary
- Kanwar Lake, Asia's largest oxbow, is ecologically degrading.
- The lake's fish population and biodiversity have significantly declined.
- The National Green Tribunal seeks responses from the central government.

The National Green Tribunal has initiated action concerning the deteriorating ecological condition of Kanwar Lake in Bihar, Asia's largest oxbow lake. This U-shaped waterbody, recognized as a Ramsar Site in 2020, is crucial for local fishing communities.
Reports highlight a significant decline in fish population and biodiversity as the lake's water spread shrinks and it faces ecological degradation. Several native fish species have reportedly vanished from parts of the wetland due to these issues.
The tribunal noted that the lake, which once spanned approximately 63 sq km, has fragmented into smaller water bodies because of falling water levels and encroachment. It was formed by the meandering Burhi Gandak River, representing a unique oxbow wetland ecosystem.
As a Ramsar Site, the wetland holds international importance, necessitating its ecological protection and sustainable management. The tribunal has impleaded the Union Ministry of Environment, Forest and Climate Change, the Bihar government, and pollution control boards as respondents. A response is required by August 31.