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2. Bridge protection systems - Wikipedia

   en.wikipedia.org/wiki/Bridge_protection_systems

   artificial islands built with sand and rock core that is protected by riprap. The islands are quite effective in protecting the pier by pushing the ship away, but cause environmental damage to the river bottom and, while settling , might shift the bridge piers; [ 8 ]

3. Biorock - Wikipedia

   en.wikipedia.org/wiki/Biorock

   Biorock forming on rebar in seawater in the presence of a small electric current to form an electrified reef. Biorock (also seacrete [1]) is a cement-like engineering material formed when a small electric current is passed between underwater metal electrodes placed in seawater causing dissolved minerals to accrete onto the cathode to form a thick layer of limestone.

4. Riprap - Wikipedia

   en.wikipedia.org/wiki/Riprap

   [1] [2] [3] Common rock types used include granite and modular concrete blocks. [4] [5] Rubble from building and paving demolition is sometimes used, [3] [6] as well as specifically designed structures called tetrapods or similar concrete blocks. Riprap is also used underwater to cap immersed tubes sunken on the seabed to be joined into an ...

5. AOL

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   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

6. Constructed wetland - Wikipedia

   en.wikipedia.org/wiki/Constructed_wetland

   A constructed wetland is an artificial wetland to treat sewage, greywater, stormwater runoff or industrial wastewater. [ 1 ] [ 2 ] It may also be designed for land reclamation after mining , or as a mitigation step for natural areas lost to land development .

7. Live rock - Wikipedia

   en.wikipedia.org/wiki/Live_rock

   This rock is either maricultured and sold as live rock, or can be purchased and grown in the home aquarium. Base rock can also be made from artificial rock called aragocrete, which is a hand made concrete from combining crushed aragonite, sand, and Portland cement. After allowing the cement to dry, the pieces are sometimes acid washed to ...