Aspects of the present disclosure involve hydraulic systems and methods for altering a flow of a body of water, such as a river, channel, and/or other flowing or uncontained bodies of water. In one aspect, a hydraulic system provides a velocity barrier for the impedance of aquatic organism migration. More particularly, the velocity barrier may be adapted based on the swimming capabilities of one or more aquatic organisms to impede migration. The aquatic organism may be one or more species of fish, such as species sea lamprey (Petromyzon marinus). The example implementations shown and described herein reference the restriction of the sea lamprey. However, it will be appreciated that other aquatic organisms could be restricted by the presently disclosed technology, for example, with different hydraulic targets depending on swimming capabilities.

Aspects of the present disclosure involve hydraulic systems and methods for altering a flow of a body of water, such as a river, channel, and/or other flowing or uncontained bodies of water. In one aspect, a hydraulic system provides a velocity barrier for the impedance of aquatic organism migration. More particularly, the velocity barrier may be adapted based on the swimming capabilities of one or more aquatic organisms to impede migration. The aquatic organism may be one or more species of fish, such as species sea lamprey (Petromyzon marinus). The example implementations shown and described herein reference the restriction of the sea lamprey. However, it will be appreciated that other aquatic organisms could be restricted by the presently disclosed technology, for example, with different hydraulic targets depending on swimming capabilities.

Aspects of the present disclosure involve hydraulic systems and methods for altering a flow of a body of water, such as a river, channel, and/or other flowing or uncontained bodies of water. In one aspect, a hydraulic system provides a velocity barrier for the impedance of aquatic organism migration. More particularly, the velocity barrier may be adapted based on the swimming capabilities of one or more aquatic organisms to impede migration. The aquatic organism may be one or more species of fish, such as species sea lamprey (Petromyzon marinus). The example implementations shown and described herein reference the restriction of the sea lamprey. However, it will be appreciated that other aquatic organisms could be restricted by the presently disclosed technology, for example, with different hydraulic targets depending on swimming capabilities.

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.

Installation for combating flooding associated with spates of a waterway, including a mobile barrage, an acceleration station designed to pump water through or under the mobile barrage, from upstream of the mobile barrage to downstream when this barrage is in the active configuration, so as to increase the gradient of the stream upstream of the barrage and increase the flow rate.

Installation for combating flooding associated with spates of a waterway, including a mobile barrage, an acceleration station designed to pump water through or under the mobile barrage, from upstream of the mobile barrage to downstream when this barrage is in the active configuration, so as to increase the gradient of the stream upstream of the barrage and increase the flow rate.

An actuator is provided for opening and closing a miter gate. The actuator includes a base, a slider, a yoke, a shaft, a damper and swing arms. The base supports the miter gate as a pair of doors each hinging on respective posts. The base includes a tunnel into which the slider translates. The yoke has a clevis and prongs extending therefrom that pivot on the base and a clevis. The shaft turns in the clevis. The damper has a tube that houses a spring into which a tang inserts. The tang pivots on the shaft within the clevis. The tube pivots on the slider. The first and second swing arms pivotably connect to the slider and to the doors. The doors open by translating the slider towards the doors. The doors close by translating the slider away from the doors.

An actuator is provided for opening and closing a miter gate. The actuator includes a base, a slider, a yoke, a shaft, a damper and swing arms. The base supports the miter gate as a pair of doors each hinging on respective posts. The base includes a tunnel into which the slider translates. The yoke has a clevis and prongs extending therefrom that pivot on the base and a clevis. The shaft turns in the clevis. The damper has a tube that houses a spring into which a tang inserts. The tang pivots on the shaft within the clevis. The tube pivots on the slider. The first and second swing arms pivotably connect to the slider and to the doors. The doors open by translating the slider towards the doors. The doors close by translating the slider away from the doors.

Aspects of the present disclosure involve hydraulic systems and methods for altering a flow of a body of water, such as a river, channel, and/or other flowing or uncontained bodies of water. In one aspect, a hydraulic system provides a velocity barrier for the impedance of aquatic organism migration. More particularly, the velocity barrier may be adapted based on the swimming capabilities of one or more aquatic organisms to impede migration. The aquatic organism may be one or more species of fish, such as species sea lamprey (Petromyzon marinus). The example implementations shown and described herein reference the restriction of the sea lamprey. However, it will be appreciated that other aquatic organisms could be restricted by the presently disclosed technology, for example, with different hydraulic targets depending on swimming capabilities.