Submerged breakwater for use as a perch for sand retention
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United States of America Patent
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Aug 24, 1993
Grant Date -
N/A
app pub date -
Apr 3, 1992
filing date -
Apr 3, 1992
priority date (Note) -
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Abstract
A breakwater that is formed from a plurality of modules, with each module including a base suitable for supporting the module on the seabed, a gently sloping seaward face extending above the base from one end, and a sloping beachward face extending above the base from the opposite end. The tops of the seaward and backward face meet to form a top section and at the top portion of the beachward face at the top section there is a transversely disposed concave cutout that extends across the beachward face. The cutout causes backwash water to swirl in it which removes a significant amount of the nourishment sand that is in backwash water. The cutout has two spaced apart vertically extending concave channels that connect to respective openings in the top of the module. The concave channels direct backwash water through the openings in the top of the module and these high pressure streams allow backwash water to pass seaward over the breakwater but significantly reduces the amount of nourishment sand in the backwash that passes over the breakwater to seaward.
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