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JP2002348946 |
To reduce the scale of a manhole, etc., and to shorten the construction term. A unit body 2 formed with an inlet 3, an outlet 4, and a channel 5 passing from the inlet 3 to the outlet 4 and a guide part 6 positioned on the channel 5 betw...
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JP2002339391 |
To provide a sludge collecting apparatus which can efficiently collect sludge deposited on a water bottom without polluting the surrounding water.The sludge collecting apparatus is comprised of a blocking tank 1, a rectifying means 1c, a...
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JP2002332625 |
To provide a fishway structure capable of easily carrying out joint work for positioning divided blocks and quickly carrying out built-up work.For the fishway structure continued in a state of spiral staircase and constructed by spirally...
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JP2002330662 |
To provide a member to be submerged to water bottom, giving an artificial fish shelter enabling easy growth of algae, etc., having high fish- gathering effect, resistant to aging and enabling easy transportation and installation, a mattr...
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JP2002326007 |
To solve such a problem that the suction performance of a pump is lowered or made inactive by blockage or the like caused by large size solid materials in the case when the solid materials such as earth and sand are sucked together with ...
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JP2002320995 |
To provide a water purifying device and a method therefor, the device being simple but yet consuming very little energy therein, capable of purifying water without allowing a nutriment such as nitrogen, phosphorus contained in sludge on ...
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JP2002317429 |
To provide a fishway manufactured at a low cost, capable of assuring a water-friendly environment destroyed by the construction of a gate and a bank, and having an effectiveness on environmental protection.In this fishway, at least one c...
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JP2002309545 |
To provide a durable stone masonry suited for cultivating life on existing river revetments, faces of slopes on roads, landside control works, steep slope works, various forest works, parks, private facilities, and the like, while improv...
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JP2002294677 |
To eliminate the need of large-scale works and equipment required for layout and repair, easily discharge sediment at any time, and efficiently discharge the sediment at a low cost by efficiently discharging the deposit and sediment of a...
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JP2002275863 |
To provide a river dam having ecological advantages using little environmentally harmful matters such as cement, and a river system using the same.The river dam 10 is constructed by layering a number of large stone materials 15, 16, 17. ...
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JP2002275873 |
To provide a fish way construction method allowing very easy forma tion of a fish way through which fishes and shellfishes can run up by using fish way blocks which can be harmonized to natural environment, easily installed later in exis...
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JP2002235337 |
To provide a bottom earth and sand removing method and a bottom earth and sand removing device capable of removing the bottom earth and sand in a proper period by a miniaturized device and a simplified method at a low cost without hinder...
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JP2002227168 |
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 th...
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JP3334273 |
PURPOSE: To guide fishes to the upper reaches of a dam without installing a long and large water channel. CONSTITUTION: Fishes which run up a river 2 are induced into a fish transfer vessel 9 in watertight structure. A door 23 of a fish ...
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JP3334267 |
PURPOSE: To shorten construction period of a concrete dam. CONSTITUTION: A frame is built on the body of a dam constructed up to the position of effluent pipe setting by concrete placement. Pipes 3a as divided pies of an effluent pipes 3...
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JP2002206229 |
To contrive the restoration or the maintenance of the population of wandering-through aquatic life by supporting going-upstream or downstream of the aquatic life.A fish way installed on the upstream and downstream fall part of a river cr...
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JP3319516 |
PURPOSE: To enable a reservoir to be dredged in a short period of time without once suspending its function as a reservoir, and also enable dredging works to be carried out without using special clamshells with no final effluent contamin...
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JP3319588 |
To attenuate the power of a jet stream regardless of installation conditions. A water stream led to a device is received by a collision face 22, and bounced by the peripheral sides 23 surrounding the collision face 22, and further, circu...
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JP2002146758 |
To provide a slide gate for a circular pipe, capable of preventing the destruction of a door body and a pipeline, preventing burial caused by silt, and lengthening the life span of a dam, etc.On the top surface of the bottom wall of a ho...
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JP3303049 |
To easily make fish go up to a paddy field having a water level higher than a channel by a simple constitution and to make it possible to make various kinds of living things live. A drain 13 located at a position lower than the water lev...
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JP2002129535 |
To provide a water channel member capable of maintaining an adequate moist condition for the surrounding ground and of purifying water flowing inside the channel.Waterstops (4) separating the upstream side from the downstream side are fo...
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JP2002129542 |
To provide a water discharge valve device capable of effectively changing discharge of a great quantity of water over discharge of a small quantity of water in a water discharge system such as dam or the like, reducing system expenses an...
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JP3299594 |
PURPOSE: To improve a hydrophilic property by changing optionally a shape of water discharged from a valve opening. CONSTITUTION: In a discharge valve constituted in such a way that a valve body 4 is connected in a concentrical form to t...
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JP2002115243 |
To provide an automatized movable fish pass waterway facilities, reducing the fluctuation range of water depth within a waterway in such a stream state as to allow fishes to run up and enabling an approximately fixed quantity of water to...
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JP2002105935 |
To restore or maintain respective pieces of group having a wandering property, by helping runup and rundown by walking movement of crustaceans and aquatic creatures.This fish pass installed in a level difference part between an upstream ...
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JP2002088744 |
To provide a method, in which an opening section can be formed economically, reducing the deterioration of work environment as much as possible, in the method of forming the opening section in a wall body such as a dam levee body.When an...
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JP2002088750 |
To improve water-quality environment, and to easily make fishes go up because a dam and a weir aiming at water utilization are installed in a river basin, movement in an upstream and a downstream of fishes is limited remarkably, fishes a...
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JP2002089662 |
To provide a cam mounting structure to mount a cam on a cam shaft in which the friction force acting between the cam shaft and washers is changed by converting the radial direction operation of the cam shaft into an axial direction displ...
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JP2002081045 |
To provide a fish way capable of allowing fishes to easily go upstream, and adapting to the circumstance of a river.In this fish way 10 formed on a stepped part of the river, plural water reservoir parts 14 for temporarily reserving the ...
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JP2002069989 |
To provide a water discharging gate capable of securely keeping the water discharge opening water-tight during stoppage in a so called cram shell type water discharging gate opening/closing the pipe opening 11 by slidingly moving a pair ...
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JP2002069981 |
To provide an abrasion resistant construction method for a dam embankment capable of decreasing scour generating due to impulses of large rocks or the like flowing down on an overflow part and facilitating conservative exchange and enhan...
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JP2002069991 |
To provide fish way forming blocks and a fish way capable of imparting an evacuation position or a resting position from a foreign enemy such as a bird and an external enemy from external sites and imparting a living position or a feedin...
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JP2002069990 |
To provide a runningup water course which can be installed even in a narrow space and forms a growing area necessary for running up for fish and forming an effective water course for running up of young fish.The present invention is rela...
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JP2002069984 |
To provide a water gate incorporating in a sub gate whose operation is simple, and the outflow rate is uniform in the breadthwise direction of the water way and is completely closed and prevents sand from depositing on the position right...
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JP2002054127 |
To provide a pool for a fish passage, which forms a resting region necessary for run up fish, by placing an insertable measure-shaped block at a step portion of the fish passage, to thereby facilitate the run up of fish.The pool for the ...
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JP3277489 |
To appropriately and efficiently discharge underwater sediments in the water reservoir of a dam pond or the like to prevent a pipe from being choked up therewith. The sand discharge structure is provided with an intake 12 opened to face ...
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JP2002038458 |
To vertically move the overflow part of a radial gate door body functioning as an overflow part of the partition side of a fish way without any motive power to follow the variation of the water level by attaching a float to a float struc...
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JP2002030637 |
To provide an energy absorber capable of reducing the wear of water discharge pipes in a tailrace of steep gradient, and damages of rivers and structures to which effluent is drawn off.A plurality of energy absorber tanks 5 having each i...
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JP3272695 |
To provide a water flow partition apparatus which can form a water flow detention area in which inhabitation of fish is enabled even in an artificial river. There is provided a water flow partition apparatus which is arranged along a riv...
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JP2002021055 |
To eliminate the problems of a conventional steel netting float having a large welded construction and a vacuumed tank shape for preventing the submersion of water, which causes cracks at the welded portions of the tank due to the collis...
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JP2002013127 |
To solve all points at issue on a conventional jet flow gate.A segmental cutout 2b to open a channel for draining in accordance with door opening motion which is positioned out of the channel for draining at the time of closing the door ...
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JP2001355224 |
To provide a pump facility equipped with an automatic strainer capable of operating a pump with no trouble without treating foreign matters and without installing a refuse conveying facility, a storage facility, and an incineration facil...
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JP2001348846 |
To provide a gutter pipe valve operable for limited opening in a normal condition with a small amount of flow or with opening moment by a weight and for quick closing when a water level at the side of a drain end is increased.The gutter ...
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JP2001348849 |
To provide a pump gate capable of opening/closing a water stop gate door body according to relatively easy judgement by allowing the natural drain of the water stop gate door body in a closed condition from an inside water area to an out...
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JP2001348850 |
To provide a water gate simple in work execution, ensuring control of a water in a levee or the like, and its construction method.The water gate having a water stop plate 20 integrally mounted on a precast-concrete bench flume 12 togethe...
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JP2001348851 |
To provide a fish way for facilitating the upstream movement of fishery according to the behavior of the fishery.The fish way 10 having a river bottom portion 11 formed with a slope and at least two side walls 15 for determining the widt...
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JP2001329525 |
To provide a miniaturized fish way apparatus with reduced lateral length direction or width direction as a whole and a gentle fish way gradient.A fish way main body 1 formed to have a U-shaped or tubular section is formed in a spiral thr...
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JP2001329520 |
To provide tailrace facilities and discharge method capable of discharging water without generating bubbles in discharging used sea water to the sea at a low cost.In the tailrace facilities 1 for discharging used sea water 50 or the like...
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JP2001323445 |
To automatically measure the number of fish swimming upstream on a fish ladder through image processing.A camera 1 is installed in a position where images of fish swimming upstream on the fish ladder are to be picked up, and the images p...
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JP3249048 |
To provide a fish ladder, in which the long-sized fish ladder can be constructed easily by executing the minimum construction of works to the bedrock of a river bank or a river-bed. Two or more of piers 3 are disposed in upright on a bed...
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