breakwater

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breakwater,

offshore structure to protect a harbor from wave energy or deflect currents. When it also serves as a pier, it is called a quay; when covered by a roadway it is called a mole. In the United States a breakwater commonly consists of a long mound of stone rubble and of cheaper materials like rubber tires and oil drums. The flow of waves up its slope, and the formation of swirls by its rough surface dissipate wave energy. A pneumatic breakwater consists of perforated pipes discharging air bubbles; another type has underwater pipes that direct streams of water against approaching waves to cause them to break. Breakwaters are also used to promote sedimentation, which, depending on the breakwater's alignment, will infill to produce a stable beach. The Chesapeake breakwater was the first built in the United States. See coast protectioncoast protection,
methods used to protect coastal lands from erosion. Beaches can exist only where a delicate dynamic equilibrium exists between the amount of sand supplied to the beach and the inevitable losses caused by wave erosion.
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breakwater

[′brāk‚wȯd·ər]
(civil engineering)
A wall built into the sea to protect a shore area, harbor, anchorage, or basin from the action of waves.

breakwater

1. a massive wall built out into the sea to protect a shore or harbour from the force of waves
2. another name for groyne
References in periodicals archive ?
Marinetek Finland and Marinetek North America are working together to deliver a giant breakwater system and pontoon moorings for superyachts up to 76m at the new OneA15 Brooklyn Marina in New York.
The funds will see the creation of seven new breakwaters in Oroklini and five in Larnaca, They will be created after the completion of petrol drilling installations.
The breakwater construction work is a project of the Kinki Regional Development Bureau of the Ministry of Labor, Infrastructure, Transport and Tourism, which plans to erect movable breakwaters, 230 meters in total length, in the navigation channel at the harbor entrance as part of a major initiative to cope with the threat of tsunamis in the Kainan district of the port city of Shimotsu in Wakayama Prefecture.
In recent three decades, more and more marine structures, such as breakwater, platform and turbine, have been constructed in offshore areas.
Twenty-five years after the first Breakwaters & Coastal Structures Conference (sponsored by the Institution of Civil Engineers, UK), the ninth conference took place in Edinburgh in September 2009.
and its project partners on Thursday unveiled a remote-controlled breakwater designed to rise from the sea floor to counter high tides or tsunami.
The floating breakwaters will be constructed in Tacoma, Wash.
IN 1856 James Meadows Rendel, designer and chief engineer appointed to build Holyhead breakwater, died before he could see his work completed and now, in 2006, 150 years later, there is concern that the footings on which the breakwater was built are in need of strengthening.
The coastal facilities, moles, and breakwaters of Patareisadam (Linnahalli) Harbour and the area surrounding the City Hall--it has been planned to expand Patareisadam Harbour for the reception of large vessels, tidy up the area for the common weal, and reinforce the coast outside the boundaries of the harbour.
The new construction work will include strengthening the 'roundhead' of the northern breakwater, dredging the harbour entrance and providing baffles at the breakwater to reduce potentially hazardous over-topping by heavy seas.
He also calls for construction of new offshore breakwaters to dampen the waves' energy before they reach the shoreline, but some environmentalists say this tactic has only made matters worse in other situations.
He says a factory will be set up to begin manufacturing the environmentally friendly breakwaters this year.