tetrapod

Also known as tetrapod block, stabilopod, dolosse, tetrapod(structure)

type of structure in coastal engineering

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Image: Beton-Tetrapode 2.jpg

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Commons category: Tetrapods

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Tetrapods on Graciosa Island, Azores Tetrapods in Latvia Tetrapods protecting a marina on Crete, Greece.

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 against them, and to reduce displacement by interlocking.