Knowra Beach nourishment Beach nourishment Beach nourishment is the addition of sand or other sediment to a beach to restore lost material or widen the shore. It is a recurring form of coastal management because waves and currents continue to move the added sediment.
Sediment budget : An accounting of sediment entering, leaving, and being stored within a defined coastal area. Nourishment adds to the beach’s sediment budget, while currents and storms remove or redistribute the added material.
Coastal erosion : The loss of land or beach sediment through waves, currents, tides, or other coastal processes. Nourishment is commonly used to counter erosion without stopping the processes that cause it.
Seawall : A wall built along a shore to protect land and structures from waves and erosion. Unlike a seawall, nourishment adds beach sediment but must be replenished as it erodes.
Sea turtle : A marine reptile that nests on sandy beaches and spends much of its life at sea. Construction timing and altered sand conditions can affect nesting habitat and hatchling emergence.
Longshore drift : The movement of sediment along a coast driven by waves approaching at an angle. It carries nourished sand away from the placement site and can spread benefits or impacts alongshore.
Hurricane Sandy : A powerful 2012 Atlantic storm that caused extensive flooding and coastal damage in the northeastern United States and Caribbean. Post-storm nourishment on affected shores illustrates how projects can be tied to disaster recovery.
Groynes : Shore-perpendicular structures designed to trap sediment moving along a coast. Groynes retain sand locally, while nourishment supplies it directly and may still feed neighboring shores.
Benthic ecology : The study of organisms living on, in, or near the bottom of aquatic environments. Burial by placed sediment can disturb nearshore bottom communities until they recover or are recolonized.
Dredging : The excavation of sediment from underwater areas or waterways. Dredging often supplies sand for beach projects, linking offshore borrow sites to the receiving shore.
Tourism : Travel and related activities undertaken for recreation, business, or other purposes. Wider sandy beaches can support recreation and local tourism, one frequent rationale for public projects.
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