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JP2003064649A |
To provide a device for scouring sedimentary sand of a dam which prevents the dam from losing a function as a dam resulting from a high line of the sedimentary sand by forcibly scouring the sedimentary sand such as gravel, earth and sand...
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JP2003041559A |
To artificially construct a pothole, which is naturally formed by the power of nature, for providing a pothole type fishway block having a structure and a shape hardly causing its embedment in sand even by a small amount of water and all...
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JP2003041558A |
To improve a device constructed by connecting a suction pipe and a transfer pipe to a pump for contribution to collection of deposit, whose collection and disposal is a matter of an urgent problem in an impound part of a dam, a lake, or ...
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JP3374219B2 |
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JP3370820B2 |
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JP3367767B2 |
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JP2002371539A |
To allow fishes to go upstream via the top part of a door body of a movable weir. One end of a rubber fishpass body 1 formed in approximately U-shaped cross section is connected to the top part of a movable weir door body 3. The fishpass...
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JP2002371540A |
To allow a fishpass body connected to a movable weir door body, to smoothly move up and down when the door body rises and falls. A guide roller 4 is disposed at a contact part of the movable weir door body 3 of a steel fishpass body 1, a...
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JP2002363956A |
To restore or conserve populations of migratory aquatic organisms by assisting the going-upstream and/or -downstream of the aquatic organisms. This fish ladder which is installed in a fall part in the upstream/ downstream of a river tran...
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JP3356746B2 |
To provide an energy dissipating and sound absorbing device for the force of a current capable of accomplishing energy dissipation with variations in slow speed and obtaining the effect of sound absorption as required. An assembled chann...
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JP2002348839A |
To provide a sand discharge facility capable of discharging sand without decreasing the amount of flow water to the downstream side of a settling basin compared to the previous amount of flow. A sand discharge gate (7) having a liftable ...
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JP2002348946A |
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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JP2002330662A |
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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JP3345750B2 |
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JP2002326007A |
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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JP2002320995A |
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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JP2002309545A |
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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JP3334273B2 |
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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JP3334267B2 |
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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JP2002275873A |
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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JP3325611B2 |
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JP3319516B2 |
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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JP3319588B2 |
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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JP2002206229A |
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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JP3303049B2 |
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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JP3299594B2 |
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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JP2002146758A |
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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JP2002129535A |
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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JP2002129542A |
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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JP3277489B2 |
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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JP2002105935A |
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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JP3272695B2 |
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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JP2002088744A |
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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JP2002069981A |
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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JP2002069984A |
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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JP2002069989A |
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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JP2002054127A |
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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JP2002504637A |
In a separating grid (1) for collection and removal of solid particles and objects (4) present in running water (2) and equipped with a separating unit (8) comprising alternate fixed and mobile grid bars (9 and 10, respectively), wherein...
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JP2002038458A |
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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JP3249048B2 |
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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JP2002013127A |
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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JP3246808B2 |
PURPOSE: To ease management by providing a plurality of discharge ports with an opening/closing gate on a dam body wall surface, making steps, and connecting the ports to the downstream of a river via stepped, inlet channels and relay ch...
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JP2001355224A |
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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JP2001348851A |
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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JP2001348849A |
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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JP2001348846A |
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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JP2001329520A |
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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JP2001329525A |
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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JP3228869B2 |
To remove the dust settled on a river bottom to the lower stream by forcedly rotating a rotating body by a cam guide body provided on a door frame in interlocking with the lowering of a skin plate, and moving an elastic body on the lower...
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JP3225178B2 |
PURPOSE: To make it possible to automatically release the sludge in a sludge reservoir by communicating a rubber dam with a septic water tank by providing a river purifying facility including the rubber dam with a flood introducing block...
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