A bollard wall gate system including a lockable access door enclosing the gate which is easy-to-operate and resistant to tampering. The bollard wall gate system generally includes one or more bollard panels which form a continuous bollard wall. Each of the bollard panels includes a passageway which may be selectively opened or closed by use of a gate. The gate includes a plurality of gate members which may be raised to open the gate or lowered to close the gate. The bollard panels include an enclosure through which the gate extends. A locking device may be utilized to selectively lock the gate in its opened or closed position, with the locking device being connected to the gate within the enclosure so as to prevent tampering or unauthorized access.

A tank arrangement, duplicate cross-sectional restrictions, side roller block, openable reaction roller, openable bottom seal, reaction axle, openable side seal, gate slot inserting steps and a stress reduction cross-sectional restriction are presented to implement an emerging movement type opening/closing gate equipped with advantageous torsion structure. The arrangement enables a gate body to be operated in submerged-body state, the cross-sectional restrictions can correspond to both high tide pressure and tide flow pressure which are different in qualities, the side roller block, the openable reaction roller and the openable bottom seal resolve spatial interference problems in gate operation, compact reaction axles which endure big load enables cross-sectional restriction points at a narrow gap in a storage space, the openable side seal and the gate slot inserting steps prevent side seal rubber from damage and the stress reduction cross-sectional restriction can cut high tide pressure torsion moment by more than 50%.

A tank arrangement, duplicate cross-sectional restrictions, side roller block, openable reaction roller, openable bottom seal, reaction axle, openable side seal, gate slot inserting steps and a stress reduction cross-sectional restriction are presented to implement an emerging movement type opening/closing gate equipped with advantageous torsion structure. The arrangement enables a gate body to be operated in submerged-body state, the cross-sectional restrictions can correspond to both high tide pressure and tide flow pressure which are different in qualities, the side roller block, the openable reaction roller and the openable bottom seal resolve spatial interference problems in gate operation, compact reaction axles which endure big load enables cross-sectional restriction points at a narrow gap in a storage space, the openable side seal and the gate slot inserting steps prevent side seal rubber from damage and the stress reduction cross-sectional restriction can cut high tide pressure torsion moment by more than 50%.

The present invention relates to a flood irrigation apparatus. The apparatus comprises a headgate in communication with a body of water. The body of water can be a pond or a reservoir, for example. The apparatus further comprises a conduit securely connected to the headgate and in fluid communication with the headgate, wherein the flow of water within the conduit is regulated by the operation of the headgate. The apparatus further comprises an exit chamber securely connected to the conduit and in fluid communication with the conduit. The exit chamber comprises a plurality of vertical bricks disposed on the floor of the exit chamber. The vertical bricks facilitate the trapping of the silt and debris on the floor of the exit chamber in order to provide substantially silt-free water for irrigation.

An integrated system comprising a barrier, such as a weir with movable gates, controllably blocks water flow in a natural or concrete lined channel. Without substantially impeding flow in normal conditions, the barrier is configured to back up flood waters to spill into an upstream prepared detention basin. Water is thus kept from downstream areas until subsequently drained through a controlled spill. Multiple units installed in a watershed can store significant amounts of flood water, e.g., during a hurricane, protecting life and property downstream. The electromechanically-operated gates can be operated locally or from a remote control center. Gauges and sensors positioned near the weir and/or throughout the watershed can provide data used to control one or more barriers in the watershed, and the data may be used to train a machine learning model to control the system.

A dropdown flood barrier (100) is disclosed, which comprises at least one panel (102) and an associated counterweight (104), the panel configured to be movable between an elevated position and a lowered position in cooperation with the counterweight; and at least one rotatable drive (106) coupled to the panel, and is configured such that rotation of the rotatable drive enables the panel to be moved from the elevated position to the lowered position, the rotatable drive includes a brake arranged to exert a force against the rotation of the rotatable drive when a speed of the rotation exceeds a predetermined threshold, wherein in use, the rotatable drive is activated to enable the panel to controllably move under its own weight from the elevated position to the lowered position to form a barrier against flood water, the controllable movement of the panel enabled by the brake of the rotatable drive and the counterweight.

A dropdown flood barrier (100) is disclosed, which comprises at least one panel (102) and an associated counterweight (104), the panel configured to be movable between an elevated position and a lowered position in cooperation with the counterweight; and at least one rotatable drive (106) coupled to the panel, and is configured such that rotation of the rotatable drive enables the panel to be moved from the elevated position to the lowered position, the rotatable drive includes a brake arranged to exert a force against the rotation of the rotatable drive when a speed of the rotation exceeds a predetermined threshold, wherein in use, the rotatable drive is activated to enable the panel to controllably move under its own weight from the elevated position to the lowered position to form a barrier against flood water, the controllable movement of the panel enabled by the brake of the rotatable drive and the counterweight.

An automatic water control system for open ditch drainage includes a drainage control apparatus that is designed to be disposed in a drainage ditch and to control the water level in the drainage ditch, as well as the water table level in the field.

An automatic water control system for open ditch drainage includes a drainage control apparatus that is designed to be disposed in a drainage ditch and to control the water level in the drainage ditch, as well as the water table level in the field.

The invention relates to a friction reduced and ice resistant water control gate abutment plates that permit, without damage to the concrete, large relative thermal movement between the abutment plate assembly and the concrete abutment or pier to which the assembly is attached. Features that provide ease of maintenance, tight sealing and debris damage resistance are also disclosed.