Beach Nourishment

Beach nourishment also called beach replenishment, is the replacement of sand lost due to erosion by sources outside the eroded beach. This helps minimize damage from storm surges, tides and tsunamis. Beach nourishment does not stop erosion.  It only mitigates its effects while eroding away the sand used in the nourishment process and eventually bringing the beach back to its original pre-nourished state. Because of this reason beach nourishment is a repetitive process. After all the "new" sand has eroded away, the beach will have to be re-nourished. While this method helps protect coastal areas it usually is very costly.

beach nourishment : image credit : wikipedia