The present invention relates to a retractable floodwall system comprising a floodwall panel installed in a housing unit. The floodwall panel is connected with a counter-balance weight. The floodwall panel is capable of being raised from the housing unit and being lowered into the housing unit. The present invention also relates to a method of flood prevention comprising providing a floodwall panel in a housing unit; connecting the floodwall panel with a counter-balance weight; raising the floodwall panel from the housing unit for flood prevention; and lowering the floodwall panel into the housing unit.

The present invention relates to a retractable floodwall system comprising a floodwall panel installed in a housing unit. The floodwall panel is connected with a counter-balance weight. The floodwall panel is capable of being raised from the housing unit and being lowered into the housing unit. The present invention also relates to a method of flood prevention comprising providing a floodwall panel in a housing unit; connecting the floodwall panel with a counter-balance weight; raising the floodwall panel from the housing unit for flood prevention; and lowering the floodwall panel into the housing unit.

The disclosure provides a high-efficient swift stepless layering water intaking gate device, is including setting up the water intaking gate slot of the relative setting of the inlet port both sides on the dam body, its characterized in that: a plurality of sections of door leaves are arranged in the water taking gate groove from bottom to top; all the door leaves in the water intaking gate groove are divided into a group, and the adjacent door leaves are connected by adopting an internode connecting plate to form an integral water intaking gate; or all the gate leaves in the water intake gate groove are divided into a plurality of groups to form a plurality of sets of stop log type water intake gates, each set of stop log type water intake gate is provided with a plurality of sections of gate leaves.

The disclosure provides a high-efficient swift stepless layering water intaking gate device, is including setting up the water intaking gate slot of the relative setting of the inlet port both sides on the dam body, its characterized in that: a plurality of sections of door leaves are arranged in the water taking gate groove from bottom to top; all the door leaves in the water intaking gate groove are divided into a group, and the adjacent door leaves are connected by adopting an internode connecting plate to form an integral water intaking gate; or all the gate leaves in the water intake gate groove are divided into a plurality of groups to form a plurality of sets of stop log type water intake gates, each set of stop log type water intake gate is provided with a plurality of sections of gate leaves.

An Herodotus machine, or bottom-source, up-stair, hybrid pump and step lock system, includes synchronized reciprocating cross-gate displacers with commonly synchronized gates and floating body movers; specifically including a sequence of ascending adjacent step locks separated by gates with reciprocating gears on axles aligned over respective gates. A chain over each reciprocating gear has a displacer on each end, with one displacer in the upper lock and the other displacer in the lower lock. Rotating first, the downstream displacer descends to raise the lower lock water level, while the upstream displacer rises to lower the upper lock water level, and vice versa on the reverse gear rotation. Displacers are sized such that water levels in alternate pairs of upper lock and lower lock are made the same. The gate is then opened and a watercraft can be transferred from the lower lock to the upper lock or vice versa.

An Herodotus machine, or bottom-source, up-stair, hybrid pump and step lock system, includes synchronized reciprocating cross-gate displacers with commonly synchronized gates and floating body movers; specifically including a sequence of ascending adjacent step locks separated by gates with reciprocating gears on axles aligned over respective gates. A chain over each reciprocating gear has a displacer on each end, with one displacer in the upper lock and the other displacer in the lower lock. Rotating first, the downstream displacer descends to raise the lower lock water level, while the upstream displacer rises to lower the upper lock water level, and vice versa on the reverse gear rotation. Displacers are sized such that water levels in alternate pairs of upper lock and lower lock are made the same. The gate is then opened and a watercraft can be transferred from the lower lock to the upper lock or vice versa.

A diversion point water delivery control system with a headgate assembly, first gate, and powered actuator for controlling the first gate. A headgate box surrounds the headgate assembly and has a second gate that restricts waterflow to the diversion point. Sensors measure water levels adjacent to the headgate box and determine water flow. A powered control unit connects to the powered actuator and sensors and has a computer with memory to operate the system, as well as a transceiver for sending and receiving instructions and data. In one mode of operation, the first gate may be automatically positioned and repositioned to maintain a predetermined water flow through a diversion to a channeled waterway despite water level fluctuations in a primary waterway from which water is diverted. This helps the system conserve water by preventing overdelivery and over-diversion in water delivery networks.

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.

A surge gate for blocking a surge of water includes a sleeve disposed below a waterline of the water, wherein the sleeve has an open upper end and a closed lower end, and a piston slidably disposed in the sleeve, wherein the piston is configured to rise vertically within the sleeve along a vertical axis between a first position with an upper end of the piston positioned below the waterline, and a second position with the upper end of the piston positioned above the waterline.