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Groins are built to stabilize a stretch of natural or artificially nourished beach against erosion that is due primarily to a net longshore loss of beach material. Groins function only when longshore transport occurs.
- Jetties
Jetties. Jetties are used for the stabilization of...
- Jetties
A groyne (in the U.S. groin) is a rigid hydraulic structure built perpendicularly from an ocean shore (in coastal engineering) or a river bank, interrupting water flow and limiting the movement of sediment. It is usually made out of wood, concrete, or stone.
Groins are constructed perpendicular to the shoreline and may extend several hundred feet past the beach. A group of groins is called a groin field. They may be constructed of boulders (rip-rap), concrete, metal sheet piles, geotextile sand bags, or wood.
We define groins as shore-perpendicular structures aimed at either (1) maintaining the beach behind them, or (2) controlling the amount of sand moving alongshore. An example of beach protection with groins is shown in Figure 1.
Over 75% of the beaches in southern California are retained by structures, whether natural or artificial, and groin fields built decades ago have been important for local beach growth and ...
help to build beaches that protect land behind the beach from flooding and erosion. Groynes may extend across part or all of the intertidal zone and are normally grouped together to form groyne systems or fields. This guide: explains the role of groynes in the context of wider shoreline management and sediment transport processes
Breakwaters, groins, jetties, and seawalls are shoreline armoring structures built to protect the coastline and prevent beach erosion.
