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JP2006009256A |
To provide guidance equipment for fishes and the like, which enables the fishes and the like to be surely guided to a downstream or upstream side with respect to a crossing structure of a river, by forming a descent path or a run-up path...
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JP3728725B2 |
To recover and preserve the natural ecological system by effectively preventing a partial scour in a riverbed to relax the flow speed and improve the sight. A flow relaxing mat 30 provided with several cones 32 projected from a surface t...
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JP2005334846A |
To provide a method for treating sediment in a reservoir capable of treating the sediment settled on the bottom part of the reservoir by supply or discharge of agricultural water and also reducing a cost required to treat the sediment in...
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JP3723852B2 |
To provide a device and a method for eliminating water bottom sediment capable of preventing the water bottom sediment from being stirred and water near the sediment from being contaminated when a sediment transfer tube is installed and ...
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JP3720782B2 |
To install dam flood discharge equipment with a large discharge capacity at a low cost in a short construction period by remodeling existing equipment. In this dam flood discharge equipment having a gate 2 installed at the top part of th...
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JP3721455B2 |
To provide a fish run-up structure for efficiently constructing a fish-way allowing the natural run-up of fishes from a drainage to a rice field. A plurality of water passage members 7 in a U-grooved shape are placed in stages to gradual...
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JP3716311B2 |
To provide a construction method and an apparatus for removing sediment from the bottom of water, which have the function of adjusting the inflow of the sediment so that soil concentration can be set proper, through the use of a natural ...
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JP3716075B2 |
To provide a gate which excels in the effectiveness in transportation and installation and which can retain the same degree of performance as per the conventional arrangement. A gate 11 is to be installed on the way of a circular pipe li...
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JP2005290788A |
To provide a fishway constituting overflow partition wall requiring a least possible amount of material.The fishway constituting overflow partition wall 3 is arranged in a water channel 2 extending between both side walls 5 of the water ...
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JP2005290789A |
To provide a fishway constituting block capable of mounting a partition wall easily in case the wall is shaped to be larger outward in the radial direction as going from one side in the extending direction to the other side.On a bottom f...
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JP3708890B2 |
To attach a lining member on a bed of a water way without using an anchor bolt. A pedestal 6 is fixed to a recessed part 5 provided on the bed of the water way 2, and many lining members 7 are arranged on the pedestal 6. Concrete 8 is fi...
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JP2005282287A |
To provide economical and safe fishpass forming members and a water channel type fishpass capable of providing a shelter against foreign enemy such as birds and a rest place and living places and bait places by adding them to a dam and a...
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JP2005282284A |
To reduce the breakage and fall of a rolling stone by collision.This fishpass 1 is formed to produce a pool as a still water area for rest for fishes by relieving waterstream and so that a plurality of partition walls 5 for securing an o...
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JP3702345B2 |
To provide an overflow spillway of a dam, which can be used as a levee top road, by omitting a bridge which is conventionally used as the levee top road. This overflow spillway 20 of the dam has a function of a road bridge and a spillway...
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JP3694503B2 |
To provide a deposit conveying mechanism capable of efficiently conveying a deposit. This deposit conveying mechanism comprises a suction opening part 12, a vertical pipe part 13 and a horizontal pipe part 14 which is almost horizontally...
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JP2005226404A |
To prevent downward effluence of an effluent gate and generation of cavitation.A diameter-reduction part 12 is formed in an effluent pipe line 1, an induced face 12a toward the upstream side and a water-tight face 12b toward the downward...
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JP2005220610A |
To provide a slit sand control dam suitable for environmental preservation, including flood control, irrigation and the protection of an ecosystem.This slit sand control dam has a slit for discharging an avalanche of sand and stone flowi...
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JP2005214006A |
To recover and preserve a natural ecological system by effectively preventing a partial scour in a river bed to relax a flow speed and improve a sight.A flow relaxing mat 30 and two kinds of gabions 40 filled with stones are combined and...
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JP2005202674A |
To provide a method for counting the number of fishes passing through a fish way, the method being capable of efficiently providing a highly precise and reliable result of counting.A plurality of cameras are installed so that they may ph...
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JP2005194856A |
To shorten a construction period when constructing a dam body by incorporating it in the dam body when constructing a power plant, and enabling dam construction without bypass river tunnel when constructing a dam system.A coupling body o...
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JP2005194785A |
To provide a system for discharging earth and sand with a relatively large particle diameter which is deposited in a large amount from a middle stream area to an upper stream area of a water reservoir.The system (10) for discharging sedi...
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JP3668725B2 |
To impart a fish inhabiting environment by constituting a state of having a flowing water pool and thickly growing water plants of a fish inhabiting condition in a concrete waterway. A shock absorbing wall changes the water flowing direc...
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JP3668907B2 |
PURPOSE: To use a hydraulic power for an elevator type fish way device to comply with fishes going upstream or downstream. CONSTITUTION: A plurality of box-shaped vessels, which turnably support a roller chain 16 over the upstream and do...
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JP3666300B2 |
To provide a spiral fish pass structure which can be produced in a short construction period, has sufficient rigidity and earthquake resistance in a finished state thereof, and has improved safety. A structure in which a fish pass spiral...
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JP3663586B2 |
PURPOSE: To improve efficiency in execution of work by a method wherein removers that rub the surface of an overflow weir are provided on a carrier that moves in shuttling along the overflow weir, and weeds stuck to the surface of the ov...
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JP3662051B2 |
To provide a prostaratable weir facilitating the movement of fish to the upstream side or the downstream side with a simple structure. This prostratable weir is provided with an upstream side sheathing board 4 rotatably fitted with the u...
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JP2005155111A |
To provide a fishway forming overflow type partition wall block for reducing the quantity of materials to be used, while securing the original function.While generating overflow water continuously flowing along a top part 12a, one side s...
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JP3659636B2 |
To provide a sand deposition preventive method arranged in a sand control dam bank, composed of a first waterway formed on the upstream side of the dam bank and a second waterway formed in the dam bank and on the downstream side of the d...
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JP3650701B2 |
To provide a hydraulic turbine generator used also as a dam outlet structure capable of reducing an initial cost, self-sustaining operating power for a pump, lowering a running cost and, at the same time, operating the pump and hydraulic...
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JP3648693B2 |
To use hydraulic power for an elevator type fish ladder device, to correspond to ascending and descending fishes and to form a guide water flow in a natural flow. Frames constituting ascending-descending paths 19, 20 are installed to a f...
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JP3644852B2 |
To easily make fishes ascend on a fish-pass waterway in a spiral type fish pass. The spiral type fish pass 1 is constructed so that plane shapes are formed in an approximately elliptical shape by alternately continuing linear channel sec...
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JP2005098057A |
To provide a fishway where not only swimming fish but also various aquatic organisms may go up and down a stream.In the fishway, which is formed to be like an open water-channel and is laid at a level difference part of a river or a wate...
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JP3638683B2 |
To attempt impact resistance and antifriction of a fish ladder by connecting a plural number of lower ends of columnar materials by making cross-sectional structure as lamination structure with fiber, steel, rubber, resin, rubber of diff...
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JPWO2002099202A1 |
At the time of hydroelectric power generation, water is supplied from the headrace pipe 1a to the turbine of the power plant to generate power, and at the same time, hydroelectric power generation in which earth and sand and organic subs...
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JP3630869B2 |
To provide a rubber weir group, by which fishes can ascend a river easily even when the water level of the river lowers and which is not damaged when fishes flow down. Since recessed sections 12A, 14A, 16A are formed on the overflow surf...
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JP3628302B2 |
To provide an erosion-control dam capable of prolonging the period for using a dam and preventing a disaster of earth and sand for a long period. In the erosion-control dam having a bank wall 11 constructed by crossing a mountainous regi...
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JP2005036503A |
To provide a partition wall for a fish-pass, which is reduced in weight, and allows a person to carry out attachment/detachment thereof to/from the fish-pass.The fish-pass is formed of a fish-pass main body 1 and the partition wall 2. Th...
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JP3613619B2 |
PURPOSE: To enable a fishway to be stably secured by providing the fishway with a gate main body consisting of a door having a notch in its upper part and floats connected to the right and left of the door and also with a pair of right a...
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JP3611775B2 |
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JP3612561B2 |
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JP2005009073A |
To provide a stepped type fish way with a simple construction at a low cost.The fish way include a hydrostatic pond 2 connected to the upstream side of a river crossing object 1 such as a weir, a dam or the like, and a fish way body 3 is...
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JP3600968B2 |
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JP3601362B2 |
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JP3600966B2 |
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JP3602243B2 |
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JP2004346996A |
To provide a cone sleeve valve which can improve watertightness by bringing a gate into almost uniform contact with the whole periphery of the cone through suppressing the difference of the water stop property (watertight holding) in the...
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JP3599431B2 |
To provide the safe economical execution method of a temporary cofferdam by installing and executing the temporary cofferdam in a short period at any time regardless of the water level of a dam, etc. Pedestal concrete 2 is placed on the ...
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JP2004324317A |
To provide a wooden fishpass apparatus with a fish nest having a swift moving way for a fish group going upstream while securing a habitat of aquatic organisms based on the effective use of forest resources and growth and activation of a...
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JP2004316311A |
To provide a wooden fish way device using a fish nest having both secure of a habitat of aquatic creatures and safe movement, while considering environmental pollution and using the effective use of forest resources and fosterage and act...
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JP2004316383A |
To provide a fish pass even in a sluice gate weir of intermediate and small rivers and an irrigation channel.A slide gate and a door body of a retractable weir is packaged so as to incline and flow down an open channel-like fish pass ope...
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