| 摘要 |
An apparatus for controlling, reducing and preventing beach erosion comprises an elongated barrier formed of an apertured support grid and mesh material, where the mesh material is permeable to water but not to sand and where the mesh material comprises a number of flaps able to open only in the on-shore direction, such that water flow in the on-shore direction will cause the flaps to open, but water flow in the off-shore direction will cause the flaps to close against the support grid. Water will permeate through mesh apertures in the mesh material but sand particles will be retained on the on-shore side of the mesh material.
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