Abstract: An apparatus for reducing sedimentation in ship berths including one or m modules, spanning the entrance of a ship berth and providing a continuous, homogeneous, impervious barrier, each module including a base located on the sea floor, an accordion type curtain extendable in the vertical direction and attached on its bottom side to the base, a float attached to the curtain on the top side, a primary operating system for raising and lowering the curtain and a secondary operating system for raising the entire apparatus to the sea surface for repair or removal.

Abstract: An apparatus and method for reducing the strength of the nearbottom offsh directed current inside the surfzone thereby promoting and sand accretion on the beach. An arrangement of pipes is placed in the surfzone and operates to sequester a portion of surfzone fluid. The sequestered surfzone fluid is conveyed out to sea by way of the piping system thereby reducing the velocity and quantity of surfzone fluid reducing sand erosion.