Structure extending into a body of water to alter water flow
For the city in Spain formerly known as The Groyne, see A Coruña.
Groynes in Sitges, Catalonia, Spain
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. In the ocean, groynes create beaches, prevent beach erosion caused by longshore drift where this is the dominant process and facilitate beach nourishment. There is also often cross-shore movement which if longer than the groyne will limit its effectiveness. In a river, groynes slow down the process of erosion and prevent ice-jamming, which in turn aids navigation.
Groynes run generally perpendicular to the shore, extending from the upper foreshore or beach into the water. All of a groyne may be underwater, in which case it is a submerged groyne. They are often used in tandem with seawalls and other coastal engineering features. Groynes, however, may cause a shoreline to be perceived as unnatural. Groynes are generally straight but could be of various plan view shapes, permeable or impermeable, built from various materials such as wood, sand, stone rubble, or gabion, etc.
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...
"headland breakwater", "headland groyne", "bulkhead groyne" or "bulkhead breakwater". Use of groynes and headland groyne, accumulates the sand across the...
because of the beach enhancement. Groyne construction creates a problem known as terminal groyne syndrome. The terminal groyne prevents longshore drift from...
Bincleaves Groyne is a breakwater located off the southern area of Weymouth, England. It is the second largest of four breakwaters which create Portland...
Joanne. "South Shields' Herd Groyne lighthouse is shipshape after facelift". The Journal. Retrieved 11 December 2018. "Herd Groyne Lighthouse, River Tyne"...
was attempted by installing tetrapods along the groyne bases or by putting them into the sea like groynes. The four-armed structures, built in France and...
of sediment sources. The intervention of humans, e.g. cliff protection, groynes, detached breakwaters. The sediment budget takes into consideration sediment...
11–13th century AD. Thereafter, canals were dug, bends were straightened and groynes were built to prevent the river's channels from migrating or silting up...
the Southern Provincial Council built a groyne system to protect the bridge from the wave attack. Another groyne was built in 2005 to control the erosion...
Riegelmann Boardwalk in 1922–1923, and is held in place by around two dozen groynes. A large sand-replenishing project along Coney Island and Brighton Beach...
apostle) Pascal Duquenne as Georges Romain Gelin as Willy (sixth apostle) Pili Groyne as God's daughter, Ea Johan Heldenbergh as The priest Serge Larivière as...
movement north past the manmade Park Street groyne to create beachlets can also be readily observed. The groyne at Middle Brighton Beach captures the sand...
Material that is concentrated too far down the beach may form a temporary groyne that will encourage scouring behind it. Sediments that are too fine or too...
may have been influenced by the presence or absence of erosion limiting groynes or a pier. South, at Hornsea Burton, erosion rates rose from 1.3 to 5 yards...
called 'groynes' in some places. Examples include Long Beach in New York, The Wedge in California, and Duranbah Groyne in Australia. Jetty and groyne style...
more permanent solution than soft-erosion control methods. Seawalls and groynes serve as semi-permanent infrastructure. These structures are not immune...
council owns all the beaches, which are divided into named sections by groynes—the first of which were completed in 1724. Eastwards from the Hove boundary...
may occur at a gap in a sandbar or near a man-made structure such as a groyne. These strong currents can have a velocity of 3 ft (0.9 m) per second, can...
Promenade Beach has disappeared entirely. As a result of the city's seawall and groyne construction, the beaches further up the coast to the north have also been...
entirely shingle, although low tide exposes sand between the sea-defence groynes, varying in extent from beach to beach. The water is then very shallow...
the city. This was followed by construction of Manora breakwater, Keamari Groyne, the Napier Mole Bridge and the Native Jetty Bridge. The construction of...
Global Information