A method of using one or more first, second and/or third wave dissecting and redirecting system, and optionally one or more open dike system; positioning the one or more first, second and/or third wave dissecting and redirecting system in a first layout at one or more depths on or near an ocean floor at one or more first distances from a coastal area; and optionally positioning the one or more open dike system in a second layout at one or more depths on or near the ocean floor at one or more second distances from the coastal area; reducing a large wave and/or high tide inflow energy to less than or equal to about 50%; and optionally reducing the large wave and/or high tide inflow volume to less than or equal to about 40% while maintaining outflow volume at greater than or equal to about 90%. A first, second and third wave dissecting and redirecting equipment is also disclosed.

An open breakwater dike system comprising a dike body, anchor feet, wherein the anchor feet are connected to or integral with a bottom surface of the dike body; and a first pillar connected to or integral with an upper surface of the dike body is disclosed. In an embodiment, the open dike system further comprises a second pillar connected to or integral with the upper surface of the dike body offset from the first pillar; a first flap gate rotationally attached to the first pillar and disposed between the first and second pillars, wherein the first flap gate closes against a first extension in the second pillar; and a means for opening and closing one or more flap gates, wherein the means for opening one or more flap gates opens and closes the first flap gate. A method of using the open breakwater dike system is also disclosed.

An open breakwater dike system comprising a dike body, anchor feet, wherein the anchor feet are connected to or integral with a bottom surface of the dike body; and a first pillar connected to or integral with an upper surface of the dike body is disclosed. In an embodiment, the open dike system further comprises a second pillar connected to or integral with the upper surface of the dike body offset from the first pillar; a first flap gate rotationally attached to the first pillar and disposed between the first and second pillars, wherein the first flap gate closes against a first extension in the second pillar; and a means for opening and closing one or more flap gates, wherein the means for opening one or more flap gates opens and closes the first flap gate. A method of using the open breakwater dike system is also disclosed.

A mechanical closure device comprises an enclosure having four sides, a top and bottom and defining a discharge opening at the bottom. A floodgate assembly is interiorly removably mounted to the enclosure and comprises a pair of doors pivoted on a hinge assembly between an opened position and closed position. In the closed position, the doors seal against the flange to prevent passage of water through the discharge opening. A discharge drain assembly is preferably disposed on one door and has an opened and a closed position. An appendage is provided to facilitate opening and of the door. Upon removal, the floodgate assembly is stably positionable on a multipositionable service rack. A multipurpose tool is employed unlatching the floodgate doors and slidably removing the floodgate assembly.

A mechanical closure device comprises an enclosure having four sides, a top and bottom and defining a discharge opening at the bottom. A floodgate assembly is interiorly removably mounted to the enclosure and comprises a pair of doors pivoted on a hinge assembly between an opened position and closed position. In the closed position, the doors seal against the flange to prevent passage of water through the discharge opening. A discharge drain assembly is preferably disposed on one door and has an opened and a closed position. An appendage is provided to facilitate opening and of the door. Upon removal, the floodgate assembly is stably positionable on a multipositionable service rack. A multipurpose tool is employed unlatching the floodgate doors and slidably removing the floodgate assembly.

A water gate comprising at least one curved surface, the curved surface extending laterally between two sides; at least one web extending between the two sides of the curved surface.

A water gate comprising at least one curved surface, the curved surface extending laterally between two sides; at least one web extending between the two sides of the curved surface.

In order to achieve a swing motion type retractable floodgate using a cost-effective torsion structure, the present invention is provided with a swing pivot support mechanism, a friction shoe, a door bottom support seat, and an operation step during a tidal flow. The support mechanism allows free rotation about three axes and restricts motion in the three axis directions, and a pulling force acts on the support mechanism. The friction shoe dissipates tidal energy during closing operations in a tidal flow to a level that prevents damage to the door. Reactive forces are endured by reducing impact forces with the flexibility and strength of the door bottom support seat. Suitable tidal energy dissipation is performed by selecting friction force strength in the operation step.

In order to achieve a swing motion type retractable floodgate using a cost-effective torsion structure, the present invention is provided with a swing pivot support mechanism, a friction shoe, a door bottom support seat, and an operation step during a tidal flow. The support mechanism allows free rotation about three axes and restricts motion in the three axis directions, and a pulling force acts on the support mechanism. The friction shoe dissipates tidal energy during closing operations in a tidal flow to a level that prevents damage to the door. Reactive forces are endured by reducing impact forces with the flexibility and strength of the door bottom support seat. Suitable tidal energy dissipation is performed by selecting friction force strength in the operation step.

A wave redirecting system comprising a lower frame body having a first upper surface and a second upper surface; an upper frame body having a first upper surface and a second upper surface, wherein the upper frame body is connected to or integral with the lower frame body, wherein the upper frame body forms a first angle with the lower frame body and wherein the upper frame body forms a second angle with the lower frame body; a plurality of anchor feet, wherein the plurality of anchor feet are connected to or integral with a bottom surface of the lower frame body; and a redirecting blade having a first end, wherein a bottom surface of the redirecting blade is connected to or integral with the first upper surface and/or the second upper surface of the upper frame body and wherein the upper frame body forms a third angle with the redirecting blade is disclosed.