单词	riprap
释义	riprap /ˈrɪprap / North American noun [mass noun] Loose stone used to form a foundation for a breakwater or other structure: the rock was used extensively for ballast and riprap [as modifier]: a riprap breakwater... Both the pool and its protective lining of stone riprap must be properly sized. Therefore, the texture of the bottoms of channels should be made rough with vegetation or riprap, and outlet structures should be properly designed with energy dissipaters. A rock and log structure was placed within the riprap and willow structures to improve instream habitat for fish. verb (ripraps, riprapping, riprapped) [with object] Strengthen with riprap: incentives to keep landowners from riprapping riverbanks... A creek near the back of the house was riprapped with large chunks of sidewalk that were jackhammered out A large section of streambank was riprapped to prevent the landowner's septic system and 20 feet of severely slumping shoreline from washing into the brook. Origin Mid 19th century: reduplication of rap1.
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