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A groyne gradually creates and maintains a wide area of beach on its updrift side by trapping the sediments suspended in the ocean current. This process is called accretion of sand and gravel or beach evolution. It reduces erosion on the other, i.e. downdrift, side by reducing the speed and power of the waves striking the shore.
1. That part of the ocean lying more than a few hundred nautical mile s from shore, and thus beyond the outer boundary of green water. 2. More generally, the open ocean or deep sea. blue-water navy 1. A navy capable of sustained operations in the open ocean, beyond a few hundred nautical miles from shore. 2.
1. Living in the open ocean rather than coastal or inland waters (e.g. a pelagic shark). 2. Taking place in the open ocean (e.g. pelagic fishing, pelagic sealing). pelican hook. Also called a slip-hook or Davey hook. A hook with a hinge in the curve of the hook, normally held closed by a metal ring that keeps the two hinged parts together.
The Drake is part of the most voluminous ocean current in the world, with up to 5,300 million cubic feet flowing per second. Squeezed into the narrow passage, the current increases, traveling west ...
Latin American leaders on Monday rallied to Panama's defense after U.S. President-elect Donald Trump threatened to reimpose U.S. control over the Panama Canal, a key global shipping route located ...
A seawall (or sea wall) is a form of coastal defense constructed where the sea, and associated coastal processes, impact directly upon the landforms of the coast. The purpose of a seawall is to protect areas of human habitation, conservation, and leisure activities from the action of tides , waves , or tsunamis . [ 1 ]
The snake then wraps one or two loops around the prey, forming a constriction coil. The snake monitors the prey's heartbeat to ascertain it is dead. This can be a physically demanding and potentially dangerous procedure for the snake, because its metabolism is accelerated up to sevenfold and it becomes vulnerable to attack by another predator.
Ocean temperature and motion fields can be separated into three distinct layers: mixed (surface) layer, upper ocean (above the thermocline), and deep ocean. Ocean currents are measured in units of sverdrup (Sv) , where 1 Sv is equivalent to a volume flow rate of 1,000,000 m 3 (35,000,000 cu ft) per second.