Context

The irrigation department in Poonthura region, Kerala is set to construct eight groynes to resolve the challenge of coastal erosion.

Groynes

• A groyne is a rigid hydraulic structure built perpendicularly from an ocean shore or a river bank, interrupting water flow and limiting the movement of sediment.
• It is usually made out of wood, concrete, or stone.

Advantages

• Groynes are easy to construct. They have long term durability and are low maintenance.
• They reduce the need for the beach to be maintained through beach nourishment and the recycling of sand.