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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 ]
Construction materials commonly used include wood pilings, commercially developed vinyl products, large boulders stacked to form a wall, or a seawall built of concrete or another hard substance. Coastal property owners typically seek to develop bulkheads in an attempt to slow large landslide erosion caused by wave action.
The method is consistent with the construction method for Japanese castle walls during the 18th century (it may even have been constructed earlier) and there is evidence of a request for renovation in 1782. [3] The height of the wall was from 1.2 to 3 meters (3 ft 11 in to 9 ft 10 in), and it incorporated a number of water gates.
Cost comparisons between various seawalls are always site specific, but Seabees use approximately 22% the mass of rock for the same exposure. As the area of the unit is sensibly independent of height [aspect ratios in use vary from 0.4 to 2.5] the mass of the unit can be optimised for all stages of the production and construction process.
A tetrapod is a form of wave-dissipating concrete block used to prevent erosion caused by weather and longshore drift, primarily to enforce coastal structures such as seawalls and breakwaters. Tetrapods are made of concrete , and use a tetrahedral shape to dissipate the force of incoming waves by allowing water to flow around rather than ...
The Galveston Seawall is a seawall in Galveston, Texas, that was built after the Galveston hurricane of 1900 for protection from future hurricanes. Construction began in September 1902, and the initial segment was completed on July 29, 1904. From 1904 to 1963, the seawall was extended from 3.3 miles (5.3 km) to over 10 miles (16 km). [2]
Oosterscheldekering sea wall, the Netherlands.. Coastal management is defence against flooding and erosion, and techniques that stop erosion to claim lands. [1] Protection against rising sea levels in the 21st century is crucial, as sea level rise accelerates due to climate change.
The reconstruction of the seawall, including new construction of 3,188 ft (972 m) [1] in gaps where it had not previously existed [2] [3] began in 2017 and will be completed in 2018. [4] The storm precipitated reconsideration of seawalls and other methods of coastal protection to mitigate storm surges and sea level rise along the coast.