​Beach nourishment (also referred to as beach re-nourishment, beach replenishment, or sand replenishment) is the process by which sediment, usually sand, is lost through longshore drift or erosion is placed from other sources or dredging. A wider beach can reduce storm damage to coastal structures by dissipating energy across the surf zone, protecting inland infrastructure from storm surges and unusually high tides.

Beach nourishment is typically part of a larger coastal defence system. Nourishment is typically a repetitive process since it does not remove physical forces that cause erosion but simply mitigates their effects.

Katlantic, in partnership with Transnet Dredging Services, has successfully completed beach nourishment interventions in a number of beaches in Durban in 2018 and the main Alkanstrand beach in Richards Bay in 2019.