Answer: To trap sediment and prevent longshore drift
Notes: In an effort to combat coastal erosion in Kerala's Poonthura region, the irrigation department plans to construct eight groynes costing Rs 17.5 crore. Groynes, typically made of wood, rock, or concrete, extend from shore into the sea to trap sediment, dissipate wave energy, and counter longshore drift. They reduce erosion, widen beaches, and require minimal maintenance, serving as durable structures crucial for stabilizing coastlines and supporting local activities.
