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JP5837342B2 |
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JP3200421U |
To provide a tilting device attached to a fishway water plate, which eliminates a head between a fishway and a fixed weir, assists a smooth run-up or descent of fish, and maintains or restores a fishway population. A water utilization pl...
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JP5773304B2 |
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JP5768314B2 |
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JP5761668B2 |
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JP5737675B2 |
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JP5726475B2 |
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JP5721080B2 |
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JP5717564B2 |
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JP2015513364A |
The hydraulic structure comprises a wall (1) that creates a downstream constriction passage in the flowing surface water. An edge is provided at the downstream end (4) of the wall (1) to generate a vortex (2), which disappears on the dow...
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JP5714629B2 |
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JP2015074913A |
To provide an inflow sediment collection and discharge device which can be used for removing accumulated sediment in a reservoir such as a river, a pond, a lake or a dam lake with the inflow sediment collection and discharge device place...
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JP2015028255A |
To provide a waterway structure which can efficiently remove sediment accumulated in a waterway, without stopping operation of a power plant, and which can drastically reduce labor, costs and the like required for overflow stream power a...
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JP5621945B1 |
To provide a sabo dam having a simple structure and easy maintenance, and capable of easily switching between water intake at the time of start-up, danger avoidance at the time of flooding at the time of lodging, and removal of dust at t...
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JP5614654B2 |
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JP5599069B2 |
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JP5586112B2 |
To provide a nature adapted river-lake installation water intake facility that reduces difficulty, maintenance labor and required power in maintaining an environment for inhabiting fishes, in securing the safe water intake amount for all...
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JP5576816B2 |
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JP5555339B1 |
[Subject] While collecting easily earth and sand deposited on the upper stream side of a dam and being able to process them, structure of the dam lower stream which can be installed is provided without being influenced by a scale of a da...
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JP5526404B2 |
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JP5518795B2 |
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JP2014106549A |
To provide an electric power system monitoring control device capable of calculating a landing delay time corresponding to a water discharge amount.An electric power system monitoring control device according to an embodiment includes: s...
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JP5439247B2 |
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JP5420449B2 |
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JP5346157B2 |
To proliferate diatoms and animalcule groups preying on these, thereby enhancing improvement of water quality, and sustainment and development of an under water ecological system. The dissolved silicic acid replenishing block comprises S...
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JP2013217172A |
To provide a fishway where a plurality of fish species having different swimming types and any individuals of different body lengths can go upstream by one kind of fishway, and in particular to provide a fishway where even small-sized fi...
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JP5305439B2 |
To provide a method and a device flow-transporting an underwater sediment accumulated at the bottom of water, efficiently in bulk while being attainable in a simple structure without needing large-scale facilities and power, and to provi...
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JP2013159548A |
To provide a technology field of concrete for a scour tunnel used for a scour bypass tunnel structure reducing earth and sand flowing in a dam reservoir, and of a method of constructing the scour bypass tunnel structure using the concret...
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JP2013142283A |
To solve the problems that sediment on the bottom of a dam and sediment inside of an intake weir may increase with the lapse of time, energy consumption and a motive force may be required for discharging the sediment to the outside of a ...
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JP2013123397A |
To provide a device equipped with a member for repelling birds, without being cut even on having the action of an excessively large load by contacting wreckage, etc., and capable of being used repeatedly.The bird repellent device to prot...
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JP5216826B2 |
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JP5208056B2 |
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JP5171099B2 |
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JP5166310B2 |
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JP5166311B2 |
An opening/closing device 1 according to the present invention includes a gate 10 that receives a flow of a sewage W in an upright state, and can fall toward a downstream side of the flow and a first spring 52a that generates a force for...
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JP5166309B2 |
An opening/closing device 1 includes a gate 10 that receives a flow of a sewage W, and can fall toward a downstream side of the flow, a fall prevention unit 20b that prevents the gate 10 from falling by supporting the gate 10, a support ...
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JP2013508591A |
A safe fish guide path structure includes a horizontal tube having an intake and exhaust valve for controlling levels of air having lower viscosity than water. The horizontal tube is equipped with a transparent window at both sides about...
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JP5100705B2 |
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JP5065564B2 |
The present invention relates to an up-flow rake bar screen having a multiplicity of bars which are parallel to one another and which are spaced from one another across the screen. At least a portion of each bar is curved so that, when t...
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JP2012207399A |
To provide a log boom, for water intake from a mountain stream, which can be installed without being damaged by debris such as driftwood flowing in the mountain stream when used for a water intake facility constructed in the mountain str...
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JP5042001B2 |
To sort out the earth and sand flowing into a sand basin according to the particle sizes and materialize efficient discharge of the sand through a sand discharging pipe. The sand basin 1 includes a bottom structure 20 having larger depth...
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JP5042051B2 |
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JP4999629B2 |
To provide a vortex sand discharging pipe for discharging sand and sediment or the like accumulated around the vortex sand discharging pipe while operating a generator in a hydroelectric power plant, and a vortex sand discharging device,...
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JP4998688B2 |
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JP4966611B2 |
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JP4960109B2 |
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JP4959543B2 |
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JP2012101166A |
To provide a skill for designing the sand collection gate of a sand sedimentation basin in consideration of movement of deposited sand in a flow of a moderate rate.In a method for designing the sand collection gate of the sand sedimentat...
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JP4909259B2 |
A screening grid for discharging solids from a liquid flow. The grid includes a driveable screening strip that can be inserted into the liquid flow and includes two lateral link chains between which carrying rods extend, carrying groups ...
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JP4891723B2 |
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