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 ?
We have to protect our land so we have installed breakwaters and will put another ten and we are really, really happy.
The $105m (AED387m) contract, signed on Monday (29 June, 2015) with Van Oord Middle East in Dubai, includes beaches, quay walls, rock edges and breakwaters at Deira Islands.
The contract was signed on Monday with the Van Oord Middle East Dubai Branch, and includes beaches, quay walls, rock edges and breakwaters at Deira Islands, which is set to transform Dubai's Deira district into a world-class hub for tourism, living, retail and entertainment.
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.
While retaining the historical coverage on shoreline structure, coastal processes, and design and construction of breakwaters and related structures, this event will extend the marine energy theme initiated with the 2009 conference; with emphasis on aspects at the civil and coastal engineering interface, such as fluid loadings, resource modelling, interactions with the environment, construction, installation, cabling, servicing and maintenance.
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.
Mr Riby said fishermen are worried about the lack of a channel and claim the extension of the northern breakwater has resulted in a rapid build up of silt in the harbour which has restricted the periods available for boats leaving and entering the channel.
Holyhead Regeneration Manager Dewi Lloyd said: ``The development of a visitor railway along the breakwater is to be explored as a way of attracting tourists to the port town.
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.