65 results about "Fish migration" patented technology

A low-head impulse jet waterwheel for power generation at irrigation canal drop structures and navigation dam spillways achieves renewable electric power generation that has been lost until now due to lack of suitable equipment to convert such energy at competitive cost. Conventional practice has limited use of impulse turbines to heads of more than 50 meters or about 150 feet. However, there is now no need for such a limitation. Kinetic energy of a low-pressure jet is employed in a way that enables numerous locations to generate electricity conveniently near points of use, from a renewable source at minimum cost. The equipment can be pre-assembled for minimum installation cost at sites with no existing impoundment and can be automatically raised clear of flood levels with built-in lifting equipment. Existing multi-span bridges offer convenient access for installation and maintenance. Raising the equipment also provides clear passage for fish migration.

A low-head impulse jet water turbine for electric power generation at irrigation canal drop structures, navigation dam spillways or other low head watercourses achieves renewable electric power generation at competitive cost. Kinetic energy of a low-pressure jet is employed in a way that enables numerous locations to generate electricity conveniently near points of use, from a renewable source at minimum cost. The equipment can be pre-assembled for minimum installation cost at sites with no existing impoundment and can be automatically raised clear of flood levels with built-in lifting equipment. Existing multi-span bridges offer convenient access for installation and maintenance. The system for raising the equipment also provides clear passage for fish migration.

The invention discloses an ecological fish way with staggered spacer block structures. The ecological fish way comprises fish way side walls, a bottom plate, a plurality of hollow spacer block structures and the like, each spacer block structure comprises a straight section partition plate and an arc section partition plate, flow regulating water passing joints are arranged on the straight section partition plates and the arc section partition plates, the spacer block structures are arranged on the inner fish way side walls, the straight section partition plates are obliquely crossed with the inner side walls, an extended section is formed between the arc section partition plates of two opposite spacer block structures, a certain distance is reserved between the adjacent spacer block structures, and the fish way is divided into a plurality of cell compartments which are mutually communicated through the extended sections among the arc section partition plates. First cavities are formed in the fish way side walls, and driving plates are arranged inside the first cavities. Water flow in the ecological fish way naturally wriggles, the shortcoming of high water flow speed at a vertical slot of a traditional vertical slot fish way is effectively avoided, the influence of water conservancy and hydropower projects on fish migration can be reduced, and ecological protection of rivers is facilitated.

The invention relates to a vertical clearance type fish passing effect experimental system which comprises a water inlet system connected with a water circulation system, a water blocking system connected with the water inlet system and a water outlet system connected with the water blocking system. The water circulation system comprises a water suction pump, an overground water pool, an underground water pool, an upstream control valve and a downstream control valve. The water inlet system comprises an upstream flashboard and an upstream fish resting pool. The water blocking system is composed of a plurality of stages of fishponds. The water outlet system is composed of a downstream fish resting pool, a downstream water flow buffering box and an underground water pool. The vertical clearance type fish passing effect experimental system can be used for studying and analyzing hydraulics turbulent energy dissipation problem, a fish migration problem and hydraulics experimental model demonstration, due to the fact that the experimental system and an actual fishway partial project are built with a proportion of 1:1, the flow regime of the water flow in a fish passing facility is truly reflected, and the reliability and the accuracy of a water flow field in a fishway and the analysis of the fish passing effect are further guaranteed.

The invention is David Stauffer's river bottom siphon and hydroelectricity generator for a pollution-free hydroelectric energy generator using a submerged river pipeline and gravity for the delivery of fresh river-water for agriculture and drinking through a fabricated ecosystem to ease the problems of global warming, rising ocean levels, flooding, drought, pollution, depletion of the ozone layer, the blockage of fish migration by dams, and loss of rain forests, grazing land, and agricultural land through a system of large river-bottom pipelines to transfer the abundant supply of fresh water on the bottoms of the Columbia and Mississippi Rivers and, eventually, the Nile, Tigris, Rhine, Yellow, and all other rivers throughout the world to lands in need of fresh water (no really, I'm not joking) invention.

The invention discloses an experimental device for studying suitable hydrological conditions for fish migration. Adjust gates, water inlets and channel floor. On the basis of previous field experiments, the present invention focuses on analyzing the appropriate range and threshold of relevant hydrological elements for fish migration habits, and compares different water depths, flow velocities, and bottom quality under the condition of controlling other elements under the same conditions according to the principle of single variable. , dissolved oxygen and other factors, record the upstream migration of fish samples in each river, and explore the impact of changes in various hydrological elements on fish migration.

The invention discloses a fish reef porous concrete prefabricated block. The prefabricated block consists of an upper part and a lower part, wherein, the contour of the upper part of the prefabricated block is in a cuboid structure, a pair of side faces of the cuboid are respectively equipped with a key and a groove which are nested with another prefabricated block, and the cuboid is longitudinally equipped with a top-down through hole; and four support bodies are arranged at the lower part of the prefabricated block and are respectively positioned at four corners of the lower surface of the cuboid. The fish reef porous concrete prefabricated block has the advantages that by fully applying a spatial geometry principle in design, fish migration channels are naturally generated in the case of block combination, thus being fully applicable to inhabitation and reproduction of various living beings, and realizing perfect integration of ecological restoration and water quality improvement of river channels.

Certain types of fish respond differently to certain stimuli than other types of fish. Particularly, predetermined sound or vibration can cause certain types of fish to move away or jump. These reactions by particular types of fish can be used to capture the fish or prevent then from accessing parts of water systems. An exemplary capture mechanism employs multiple receptacles adapted to catch jumping fish from the air. An exemplary barrier of directed sound can prevent fish migration.

The invention discloses a driving assistance type vertical-seam fishway structure and a fish gathering method thereof. The driving assistance type vertical-seam fishway structure comprises a bottom plate, a side wall, multiple long separating plates, multiple short separating plates and multiple driving assistance platforms, wherein a fishway is divided into multiple pool chambers by the long separating plates and the short separating plates, and fish passing vertical seams are reserved between the long separating plates and the short separating plates; each driving assistance platform is formed by a J-shaped plate, an arc-shaped separating plate, a water outlet seam, a water supplementation seam and a small-sized wave generation machine, and arresting nets are arranged at the outer sides of the arc-shaped separating plates. According to the driving assistance type vertical-seam fishway structure disclosed by the invention, the water flow in the pool chambers and the fish passing situation in the positions of the fish passing vertical seams can be monitored in real time by cameras which are arranged in the long separating plates, images can be synchronously transmitted to a computer automatic control system for being analyzed, a command for regulating and controlling the frequency of the small-sized wave generation machine can be sent from the computer automatic control system to the small-sized wave generation machine, the water flow which is suitable for fish migration and the water sound which is capable of attracting fish to swim upstream can be formed in the corresponding pool chamber, the fish passing efficiency of a traditional vertical-seam fishway can be obviously increased, the influence on the fish migration caused by hydro-power and hydraulic engineering can be reduced, and the driving assistance type vertical-seam fishway structure is beneficial for ecological protection for a river.

The invention discloses a fish clustering effect and fish swimming trajectory model testing system. The system comprises a water tank, a water inlet pipe, a gradient pipeline, three arc-shaped plates,a water supplementing area, a long straight partition plate, a fish collection channel, four fish blocking nets, a reservoir, a fountain submersible pump, grid lines, a drain pipe and the like. By means of the testing system, the movement loci of fish and cognition of the fish clustering effect and swimming trajectory under different current gradient changes can be observed clearly; by means of flow field measurement, fish movement pictures and record data, the response regularity of fish migration and clustering behaviors for hydraulic characteristic factors can be explored, and test data and theoretical basis are provided for mining the response relationship between the water velocity and the fish migration and cluster behaviors in further depth; meanwhile, the defects that in the priorart, research on the current gradient is deficient and the testing process is unstable are overcome. The system is simple in structure and convenient to operate; the water resource is recycled, and the migration area is reduced while the water resource is saved.

The invention discloses an upstream and downstream fish dam-passing and communicating device which comprises a dam (1), wherein a fish collection system (2) in front of the dam is arranged at the upstream part of the dam (1); a fish collection system (3) behind the dam is arranged at the downstream part of the dam (1); and a generator (5) is arranged in a power generation plant (4) and is connected with a group of reversible pump turbines (6). The upstream and downstream fish dam-passing and communicating device can meet the requirements that upstream and downstream fishes communicate; the influence on arrangement of hydropower engineering is small; and the operation is simple. The upstream and downstream fish dam-passing and communicating device has positive effects on reduction of the influence of water conservancy and hydropower engineering on fish migration and promotion of river ecological protection.

The invention discloses a structure for constructing an ecological fish and water passing passage by using branches. The structure comprises a reservoir area (1) and a downstream river channel (3) separated by a dam (2); a downstream branch (4) is distributed on the downstream river channel (3); and a communicating channel (6) is arranged between the reservoir area (1) or a reservoir area branch (5) of the reservoir area (1) and the downstream branch (4). With the structure, the ecological fish and water passing passage is constructed by using the branches, the water conservancy and hydropower pivotal project is not affected, the requirement for upstream and downstream communication of fishes can be met, and the structure is particularly applicable to a high-head water conservancy and hydropower project. The structure has the positive effects on reducing the influence of the water conservancy and hydropower project on fish migration and promoting ecological protection of rivers.

A stormwater channel includes a central channel bed flanked by left and right walls, with riparian planters and riparian reservoirs extending longitudinally through the channel. Water flows through the planters and reservoirs. Each planter contains plant-anchoring material and biochar. Riparian plant seeds or seedlings are planted in the planters and watered to form a riparian ecosystem. The stormwater channel also includes a fish migration channel adjacent to the riparian planters and reservoirs, enabling anadromous fish to swim upstream through the channel. Fish can be detected, trapped, and relocated past barriers using a drone.

The invention discloses a swimming channel for allowing migration fishes to pass. The swimming channel for allowing the migration fishes to pass comprises a migration channel and a water inlet pipe and a flow outlet dam which are arranged at the two ends of the migration channel respectively, the water inlet pipe is arranged on the upstream side of the migration channel, and the flow outlet dam isarranged at the downstream end of the migration channel; the interior of the migration channel is partitioned into testing areas which are sequentially arranged in the water flow direction through multiple water retaining insertion plates lower than the upper edge of a water channel, the tops of the water retaining insertion plates are provided with submerged rectangular grooves, and then notch weirs are formed on the top edges of the water retaining insertion plates; and one side edge of each water retaining insertion plate is concaved inwards to form a gap, a vertical seam is reserved between the inward concave side edge of each water retaining insertion plate and the water channel groove wall, the bottom end of each vertical seam extends to a water channel bottom plate, the upper end of each vertical seam extends to the upper edge of the corresponding water retaining insertion plate, and each vertical seam has two arrangement modes including the same side or the different side. Theswimming channel for allowing the migration fishes to pass has the beneficial effects of being simple in structure, easy to manufacture, economical, practical, excellent in hydraulic characteristic and capable of generating a turbulence zone and a vortex zone which are needed by fish migration.

The invention belongs to the technical field of water conservancy and hydropower engineering and environmental protection, and discloses a fish migration channel which mainly comprises an upstream fish channel opening, a fish passing channel, a downstream fish channel opening and a rest pool, and the fish passing channel is formed by combining and connecting a plurality of separated main-loop basic units. According to the fish migration channel disclosed by the invention, the loop is separated from the main path by utilizing the structural design of separating the main-loop basic unit, and the purpose of dissipating energy of the main path is realized by virtue of the loop; meanwhile, the structure enables the main path to form a plurality of flow velocity areas, and a rest area and an upstream area are provided for fish migration. The influence of various buildings on the original river ecology in the water conservancy project is weakened, a harmonious water ecological environment can be established, the energy dissipation effect is good, the fluid speed in the fish migration channel is remarkably reduced, and the upstream energy consumption and migration difficulty of fishes are reduced. Meanwhile, the structure does not need to manually control a channel switch, has the characteristic of simple structure, and is convenient for construction and later operation and maintenance.

The invention discloses an experiment device for research of suitable hydrologic conditions of a fish habitat. The experiment device comprises an outer wall, an energy consumption tank, a habitat experiment area, a water pump and the like, wherein the fish habitat experiment area is the core area of the model. Bottom plates of different heights are arranged in the experiment area, so that a step-type fish habitat is constructed, and contrastive analysis of different water depth conditions is achieved; each bottom plate is provided with four different types of substrates, namely grassland, bare land, gravel and cobble in sequence. According to the experiment device, focusing on the range of the suitable hydrologic conditions of a fish spawning period habitat and threshold analysis, based on the single-variable principle, in the condition that the other factor conditions are controlled to be consistent, fish upstream processes in different situations are compared, the passing condition of fish upstream and migration in each river is recorded, and the influence of water depth changes on fish migration is explored.

The invention discloses a gate underwater opening/closing device for assisting fish migration and upstream going and an opening/closing method based on the gate underwater opening/closing device for assisting the fish migration and upstream going, and relates to the technical field of gate opening/closing. The gate underwater opening/closing device for assisting the fish migration and upstream going comprises a power line, an electric lifting rod, a water sealing seat and square steel, wherein the power line is connected with an external control system, and conveys power required by a driving motor of the electric lifting rod; the driving motor drives a ball screw to rotate in a nut through a reduction gear unit; and the ball screw converts rotary motion into linear motion of the nut to push a push rod to rise and open a gate. The water sealing seat comprises round steel, an oil seal and bolts; the outer sides of the electric lifting rod and the water sealing seat are sleeved and connected with the square steel, and the water sealing seat and the square steel prevent water leakage of the electric lifting rod. According to the invention, waterproof measures are improved, the common electric lifting rod opens and closes the gate underwater, the underwater opening/closing method can prevent a hydraulic jump phenomenon under the gate, and hydrodynamic conditions beneficial to the fish migration and upstream going are formed.

The embodiment of the invention provides a method and device for determining fish migration ecological flow, according to field observation or indoor experiments of to-be-studied fish, migration stimulation hydrological conditions of the to-be-studied fish are explored, and a fish migration flow velocity suitability curve and a fish migration water depth suitability curve corresponding to the to-be-studied fish are established; a hydrodynamic model according to the river network information of the river channel where the to-be-studied fish is located and the section information of the river channel; according to the fish migration flow velocity suitability degree curve, the fish migration water depth suitability degree curve and the hydrodynamic simulation result, the total length of the fish migration suitable river channel under different flows is calculated; and a mapping relation is created between the total length of the fish migration suitable river channel and the flow, and the fish migration ecological flow is determined according to the mapping relation between the total length of the fish migration suitable river channel and the flow. The migration process of the fish and the hydrological conditions required in the migration process are considered, so that the accuracy of a calculation result is improved when the river ecological flow in the fish migration process is calculated.

The invention discloses a hydropower house tail water channel bottom slope structure facilitating fish migration. A tail water channel bottom slope adopts a gradual change bottom slope inclined to a plant, the slope degrees of the tail water channel bottom slope are gradually increased from the riverway upstream tail water channel bank slope to the riverway downstream tail water channel bank slope, and the riverway downstream tail water channel bank slope forms a flow field condition suitable for fish gathering. The slope degree of the portion, close to the riverway upstream tail water channelbank slope, of the tail water channel bottom slope is 1:4.5, the slope degree of the portion, close to the riverway downstream tail water channel bank slope, of the tail water channel bottom slope is1:3, and the middle part of the tail water channel bottom slope is gradually increased from 1:4.5 to 1:3. By means of the hydropower house tail water channel bottom slope structure, the bottom slopeinclined to a tail water channel is changed into the gradual change bottom slope inclined to the plant, a water flow path in the tail water channel of the plant is limited, main flow is inclined to the upstream side of the river channel, meanwhile, the riverway downstream side tail water channel bottom slope is locally lifted to then increase the flow speed of the water flow at the position, the flow field conditions in the tail water channel are improved, accumulation of fish in the riverway downstream side tail water channel bottom slope is facilitated, a fishway inlet is formed in the corresponding position, and the fish passing effect can be effectively improved.

The invention discloses a fish migration channel determination method and system. The method comprises the following steps: determining water environment parameter information of a target fish habitat according to basic topographic data and hydrological data of the target fish habitat; determining a motion track of the target fish in combination with the swimming ability of the target fish, the upstream behavior characteristics and the water environment parameter information; clustering the motion trails by using a clustering analysis method, and determining a plurality of potential migration channels of the target fish; and determining the weight of each potential migration channel, and determining a final migration channel of the target fish by using a weighted average method. According to the method and the system, the considered influence factors are comprehensive and accurate, and the determined migration channel is obtained through quantitative calculation, so that the accurate fish migration channel can be quickly obtained.

The invention discloses a seasonal hydro-junction with a high environmental requirement. The seasonal hydro-junction solves the technical problem of the main defect of the hydro-junction, and thoroughly solves the four problems of reservoir area sediment accumulation, reducing of sediment in front of a reservoir, reservoir area water quality deterioration and fish migration recovery. According to the technical scheme, from the last flood period to the last drought period of the next year, the seasonal hydro-junction keeps the normal high water level and achieves impounding functions; and from the last drought period to the last flood period, all water gates of the seasonal hydro-junction are opened, all the impounding functions are stopped, and a riverway returns to a natural state.

The invention relates to a vertical shaft type fishway and aims at providing a vertical shaft type fishway simple in structure, convenient to construct, small in occupied area and low in input cost so as to reduce fish migration difficulty. According to the technical scheme, the vertical shaft type fishway is characterized by comprising a rectangular vertical shaft, a plurality of transfer ponds are arranged in the vertical shaft and arranged at two ends in the length direction of the rectangular vertical shaft, the transfer ponds at two ends are upwards arranged at intervals, two adjacent transfer ponds at the two ends in the length direction of the rectangular vertical shaft are connected through a U-shaped beam, a water inlet of the U-shaped beam is communicated with the transfer ponds at one end, and a water outlet is located above the transfer ponds at the other end.

The invention discloses an ecological hydropower station and belongs to the technical field of hydropower stations. A sand washing and water discharging valve of an existing hydropower station is changed into a metal hydraulic cylinder capable of ascending and descending, in the fish migration period, the metal hydraulic cylinder is compressed to the position below the riverbed, fish migration can be achieved, in addition, sediment deposited in the last year can be flushed to the downstream part, geological pressure is released, and the ecological effect is good.

The invention discloses a fishway system beneficial to stable and smooth migration of fishes. The fishway system beneficial to stable and smooth migration of the fishes comprises a fishway bottom plate, a pair of fishway outer wing walls and a plurality of migration auxiliary units, wherein each migration auxiliary unit comprises a fixing plate, a limiting plate, a sliding plate and a movable baffle, wherein the fixing plate is in an inverted L shape; the limiting plate is located on the downstream part of the fixing plate, and the limiting plate is provided with a vertical sliding way which is concaved inwards from the top surface; the sliding plate is vertically matched in the sliding way of the limiting plate, the upper end of the sliding plate protrudes out of the top surface of the limiting plate, the top surface of the sliding plate is fixedly connected with one end of a pull rope, and the other end of the pull rope is vertically upwards connected to a winch and is fixed on the fishway outer wing walls; the movable baffle is formed by hinging one side of a horizontal plate and one side of a vertical plate which are hinged to each other, the other side of the horizontal plate is hinged to the sliding plate, and the side edge of the lower part of the vertical plate is hinged to the upper side edge of the fixing plate. The fishway system beneficial to stable and smooth migration of the fishes has the advantages of being simple in structure, convenient to operate and observe, good in fish migration stability and high in effect.

The invention relates to a fishway structure for improving fish migration efficiency and a construction method thereof. The fishway structure comprises a body, wherein a dam body connected with river banks on the two sides is built on a river channel, a water inlet is reserved in the dam body, the body extends downstream from the dam body, the inclined upper end of the body directly faces the water inlet and is integrally formed in a pouring mode, the inclined inner bottom surface of the body is slope-shaped and is provided with a plurality of steps which are distributed up and down, the upper end part of the inner bottom surface of the body is concavely provided with a mounting groove which horizontally communicates with an upstream reservoir of the river channel, first guide plates are hinged between the vertical inner walls of the two sides of the mounting groove, the edges of the two sides of the first guide plates abut against the vertical inner walls of the two sides of the mounting groove in a sliding manner, a hinge shaft of each of the first guide plates is close to one side of the corresponding step, and a first floating plate for supporting the corresponding first guide plate is mounted at the lower end part of the edge of one side, facing the upstream reservoir, of each of the first guide plates. According to the fishway structure, fish can still smoothly migrate when the upstream water level is lowered.

The invention relates to a lifting fish channel structure, and belongs to the technical field of fish channel building designs. The lifting fish channel structure comprises a mobile trolley pond room,a track, a track beam and a lifting traction device. The mobile trolley pond room is arranged on the track, the track is fixedly mounted on the track beam, and the lifting traction device is used fordriving the mobile trolley pond room to make a reciprocating motion along the track. The track beam is arranged on the downstream dam slope of a dam or on the bank slope on the side of the dam, so that one end of the track is connected with the downstream river channel and the other end of the track is connected with an upstream reservoir. The mobile trolley pond room consists of a fish gatheringpond room and an inlet section of a fish room. The fish gathering pond room is connected to the inlet section of the fish room through an entrance door. An exit door is arranged on the fish gatheringpond room. A water supply pipe communicates with the fish gathering pond room. The lifting fish channel structure has advantages of simple structure, convenient arrangement, and low project investment. Meanwhile the difficulty of fish migration is reduced by using artificial means to help fish migration, and the lifting fish channel structure is especially suitable for the condition that the fishchannel is difficult to build in a water conservancy and hydropower project with high dam height.