The tubewall and the boxwall from NOAQ are two such mobile protective barriers. Both are designed so that they are automatically anchored by the own weight of the flood water. This way we have been able to make the actual barriers very light. They weigh less than 1% of the sandbags, but they are still 100% effective. A 50 cm high barrier weighs no more than 3,5 kg per running metre.
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