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JP3131954U |
To provide a fishway that can be easily installed for an existing weir without a fishway or a dam weir. The present invention is a fishway including a fish rest room connected by a rope 2 in a circular conduit 1 and composed of a plurali...
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JP3917475B2 |
To provide a protection installation for a fishway intended for preventing a fishway outlet and the fishway from being buried or blocked by earth and sand or the like flowing down, stably supplying a stream, easily enabling fishes going ...
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JP3918043B2 |
To enhance the sand discharge performance and to discharge a sand containing water flow in a short time with spiral flow by using both a group of multistage permeable sediment control dams for adjusting and fine-graining the inflow sedim...
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JP3916829B2 |
To provide a vibration reducing device of a pump plant for taking the most preference over pump performance and a civil engineering-construction cost and reducing vibration of the pump plant so as not to resonate with an excitation oscil...
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JP3131402U |
To easily suck up water and accumulated earth and sand existing in each layer in a water storage part by a siphon effect and discharge them. The first pipeline 1, the second pipeline 2, and the third pipeline 3 are included, the first pi...
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JP2007092507A |
To highly accurately adjust a water discharge quantity when discharging as extremely small quantity by easily reducing an unstable phenomenon of a hydraulic flow while restraining the deterioration of rigidity and a stress concentration ...
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JP3903391B1 |
To provide a partition wall for a fishway capable of improving the run-up rate of a small fish. A run-up overflow portion 11 that enables fish to run up is provided in an upper portion 10 of a partition wall main body 9 arranged so as to...
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JP3896531B2 |
To juxtapose a selective water-intake device and a fishpath device following up the upstream level fluctuation on a high dam. A water-intake gate 15 having door bodies connected in a reed screen form is provided on the lower part of a co...
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JP3897239B2 |
To provide the constitution for improving safety of work in a slope work machine for performing concrete placing work along a slope of bedrock. This slope work machine has a crane carriage 3 and a work carriage 4 freely movable along a r...
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JP3893479B2 |
To provide a sucking carrying device of a submerged sediment, and its sucking carrying method for efficiently carrying the submerged sediment over a wide range, and usable in a large-scale storage facility. This sucking carrying device 1...
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JP3889368B2 |
To provide a scour preventing structure for a dam embankment, which permanently prevents scour and damage of a downstream side of the dam embankment, and particularly an apron portion, caused by collision of huge boulders flowing downwar...
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JP3882997B2 |
To provide a sediment flushing method and sediment flushing equipment capable of gradually discharging sedimentary sand to the downstream side and removing it without discarding stored water without requiring large quantity of energy. An...
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JP3875645B2 |
To provide the wear-resistant plate structure for concrete of an effluent facility capable of preventing peeling due to a rise of the pressure of the intruding water by hindering intrusion of the water between the plate structure and a c...
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JP3871771B2 |
To attain the go up and down of fishes in a river and the sure setting and fixation to a riverbed by arranging a water basin recessed part in the surface side center part of a substantially rectangular parallelopiped block body, and sett...
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JP2007002410A |
To solve the problem that many conventional fish passes are formed of concrete or steel plates and have massive and robust structures, but the installation of such a fish pass is a heavy task and the movement of the installation location...
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JP3856371B2 |
To provide a construction method and a device for removing sediment on a bottom of a dam lake, which allows the sediment to be efficiently removed from the dam and can greatly reduce the cost of removal of the sediment. Bifurcated piping...
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JP2006299725A |
To provide a flush gate capable of surely carrying out flash-wash even in a low water level, by providing the flush gate surely transferrable to an overturning attitude from a rising water cut-off attitude, and surely autonomously restor...
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JP3831826B2 |
To provide a fish pass facility corresponding to the fluctuation of the water level of a storage reservoir in a high dam. A fish pass 7 having tunnel structure is constructed to a bank body 3 from a downstream end to a section in the vic...
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JP3831280B2 |
To provide a seal pit for drainage constituted to temporarily store drainage discharged downstream and to discharge the drainage while securing the water level of a seal level or higher. This seal pit for drainage has a damming wall for ...
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JP2006233468A |
To solve the problem that a conventional fishway is undesirable in workability due to a concrete structure, and is difficult in maintenance since sediment is easily deposited for forming a small water reservoir in a stepped shape in the ...
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JP3817190B2 |
To improve workability in an execution site and reduce execution costs by unitizing lining members installed in a section to be protected of a river structure. A feinforcements unit 1 formed of reinforcements 3, 4 assembled in a latticed...
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JP3817191B2 |
To improve workability in an execution site and reduce execution costs by contriving unitization in the range not being subjected to influence of weight as a lining method in the case that a section to be protected has a sloped face of n...
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JP2006214225A |
To provide a simple sluice for a field which is buried in a ridge between an irrigation/drainage channel and a rice field surface, which prevents leakage of water of the ridge on the periphery of an installed sluice, and which is fixed i...
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JP3809345B2 |
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, ...
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JP2006207372A |
To provide a dredge device for submarine deposit capable of solving such a problem as the submarine deposit, for example, earth and sand accumulated on the bed of the sea and, at the same time, dredging the deposit to utilize useful sand...
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JP3795132B2 |
To enable fishes to swim upstream and downstream even against various flows such as low water time and high water time, and provide a fishway for the whole fishes and the like by arranging projecting parts by stones or imitative stones o...
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JP3796690B2 |
To provide an easily manufacturable shape suitable for an irrigation canal, etc., having a space for making fishes easily stay and affording a refuge for the fishes and good workability. An artificial fishing bank and the artificial fish...
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JP3791991B2 |
To provide a method, in which a sediment can be discharged surely at any time regardless of the pondage, water usage, etc., of a dam storage reservoir. A first on-off valve 34 is closed, and soil-sand intakes 22 placed in a sediment 20 a...
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JP3791990B2 |
To provide a method, in which a sediment can be discharged surely at any time regardless of the pondage, water usage, etc., of a dam storage reservoir. Soil-sand intakes 26 in a cylindrical body are opened, an air supply pipe 18 is close...
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JP3791992B2 |
To provide a method, in which a sediment can be discharged surely at any time regardless of the pondage, water usage, etc., of a dam storage reservoir. Soil-sand intakes 24 placed in the sediment 20 and an on-off valve 26 are opened. Con...
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JP3783835B2 |
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 ...
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JP2006132248A |
To provide a waterway structure which is equipped with a space allowing the constant living of living organisms without being affected by the flow of water in a waterway, while maintaining a cross section of flowing water.This waterway s...
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JP2006112139A |
To provide a floating body type selective water intake equipment capable of eliminating a large-scaled foundation work, reducing a construction cost as well as the shortening of a construction period of time, at the same time, easily hav...
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JP3769702B2 |
To provide a fishpass and a construction method of the fishpass allowing fishes and shellfishes to easily go upstream and move while suppressing the formation of a holm in the downstream region of the fishpass. In this fishpass, a river ...
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JP3771816B2 |
To form an opening part while preventing the outflow of sedimentary soil sedimented in a check dam. This formation method for opening part in the cheek dam includes a first process for dredging soil 5 sedimented in the upstream side of t...
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JP2006104728A |
To provide a sand suction mechanism for a sand removal facility attaining cost reduction of a vertical moving mechanism for a suction pipe and stabilization and miniaturization of a pontoon in sand removal in the sand suction mechanism f...
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JP2006104846A |
To provide a fish way block body capable of obtaining an environment wherein fish is easy to live.The fish way block body 3 is a block forming the wall surface of a fish way 2 deeper than the upper surface of the river-bed 1a in the rive...
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JP3768719B2 |
To allow fish to go upstream easily over dams and banks at positions where there is a head in water level between an upstream side and a downstream side such as dams and banks. A fishpass 6 formed as an inclined surface having a specifie...
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JP3762397B2 |
To provide a water intake facility for reducing work cost, by inexpensively dispensing with drying of a work place by temporary stopping and temporary closure of water discharge in construction, in the water intake facility easily extens...
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JP2006077461A |
To provide a sediment discharge device and facility having a high availability utilizable throughout the year, in the sediment discharge device and the sediment discharge facility having the selective water intake function and the sedime...
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JP2006070531A |
To provide a fish nest block for a river securing good environment for fish to live and facilitating regeneration even if the river bottom is flattened by concrete construction work.In the fish nest block installed at the river bottom in...
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JP2006057445A |
To provide a water screen which removes sediments and increases the survival rate of fish.Flights 50 are arranged at intervals on the outer surface of the water screen 20. The flights 50 are made to cross the width direction of the scree...
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JP3749859B2 |
To protect eels by forming a fishway system for young eel having a simple structure in an estuary barrage. The fishway system for young eel is constituted of a guide water supply unit 3 provided with a guide water tank 3a on the barrage ...
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JP3749407B2 |
To provide a non-clog type pump gate which can discharge even a large garbage, simplify a garbage removing equipment or omit the same, perform high head drainage and be made in a compact size. In this non-clog pump gate (or a screw type ...
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JP2006052605A |
To solve the problems of complexity of construction, inferiority in cost effectiveness, and structure unadjusted to natural environment such as running up fish which are caused by complicate structure due to the large number of cycles of...
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JP3748391B2 |
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 ...
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JP3747296B2 |
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JP3117678U |
To provide a prefabricated fishway which is easy for fish to run up and down, is lightweight, is easy to transport, install and remove, and can be manufactured at low cost. This is an assembly type fishway 10 in which a plurality of fish...
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JP2006009241A |
To provide fishway exit equipment which can be used by being connected to an exit of a fishway of a crossing structure such as a dam with a high head and a fluctuating water level on an upstream side, and which surely guides fishes and t...
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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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