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 ?
The Port Irene breakwater project was built in five phases over eight years, with a total funding of P5.
A master plan for protecting the Polis coastline envisages the construction of 14 breakwaters.
DANGEROUS Teenagers lark about as waves crash on to breakwater
LUCKY ESCAPE Lads engulfed by waves as they stand on breakwater
However, calls for a permit system which would open the breakwater to certain types of traffic have been rebuffed by Stena, who operate the structure that was first opened in 1873.
Meanwhile, Manila Bay was a "no-walk" zone due to the strong waves that hit the breakwater.
These include the construction of a 300-metre-long stub breakwater to be constructed perpendicular to the North Breakwater to protect the government and cruise berths against locally generated waves and other waves diffracting into the port from the harbour entrance.
New Brighton''s senior helmsman Dave Lowe, who was in charge of the lifeboat, said: "The girls were in the water, clinging desperately to the rocks of the breakwater and in a very distressed state.
The spokeswoman said there was a high tide at the time of the incident and the breakwater might have been submerged.
Under the terms of the deal, Breakwater and Oak Hill Advisors will jointly pay some USD50m (EUR36.
Breakwater will be exhibiting during the ACG Capital Connection on Tuesday, April 23.
MHI), will begin construction of Vertical Telescopic Breakwater (VTB), a buoyancy-driven vertical piling breakwater, in the harbor at Shimotsu in Wakayama Prefecture.