The goal of groin installation is to trap sand.

Question

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Groin installation is a common erosion control technique used to trap sand and sediment in coastal areas. Groins are low, vertical structures built perpendicular to the shoreline, which extend out into the water. As waves approach, they are deflected around the groin, creating a sheltered area behind the structure where sand can accumulate. Over time, this can help to build up a beach and protect the coastline from erosion.

The Goal of Groin Installation Is to Trap Sand