Archive · 29 Sep 2026
Kariyachalli Island Races Erosion With Coral, Seagrass Restoration
Kariyachalli Island is becoming smaller because waves and the sea are wearing it away.
Workers are trying to help the island survive.
They are planting seagrass on frames under the water.
They are also building artificial reefs and moving coral to new places.
These natural features can help slow erosion.
They may also protect the nearby mainland from strong seas.
Storm surges and cyclones can make the problem worse.
Officials say the island needs these defences to become more resilient.
Kariyachalli Island off India's southern coast is shrinking because of erosion.
Workers are attaching green seagrass shoots to wooden frames on the ocean floor.
The restoration project includes artificial reefs, transplanted corals and seagrass meadows.
The effort aims to rebuild the island's natural defences and protect the mainland.
Official Supriya Sahu warned that storms, sea-level rise and erosion increase coastal vulnerability.
- Who
- Workers and Tamil Nadu officials, including Supriya Sahu, are involved.
- What
- A restoration project is using artificial reefs, transplanted corals and seagrass meadows to slow erosion.
- Where
- Kariyachalli Island, off India's southern coast.
- Why
- To rebuild natural coastal defences, protect the mainland and reduce vulnerability to storm surges, cyclones, sea-level rise and erosion.
- Island
- Kariyachalli Island
- Location
- Off India's southern coast
- Main threat
- Erosion
- Restoration methods
- Artificial reefs, transplanted corals and seagrass meadows
- Seagrass technique
- Shoots are threaded onto wooden frames and anchored to the ocean floor
- Protection goal
- Protect the mainland from surging seas
- Risks cited
- Storm surges, cyclonic storms and sea-level rise