244 results about "Fish ladder" patented technology

The invention relates to the technical field of fishways, in particular to a canal fishway structure, construction and design method.The canal fishway structure, construction and design method comprises the following steps that S1, a hub fishway database is established, the swimming capacity of target fishes passing through a fishway is evaluated, and the migration ecological characteristics of the fish passing objects are determined; s2, designing a fishway scheme, and determining a fishway structure preliminary design scheme; s3, designing a fishway engineering local section physical model, and performing a fishway engineering local section physical model test to obtain a pool chamber structure recommendation scheme located at the upstream of the eel way in the vertical seam type fishway; and S4, establishing a fishway overall model, and performing a fishway overall model test to determine a fishway overall structure scheme. According to the design method of the canal fishway, a theoretical basis is provided for arranging an eel fishway suitable for migration of eels and eriocheir hepuensis and a vertical seam type fishway suitable for migration of squaliobarbus curriculus and dace, and then migration channels are provided for the eels, the squaliobarbus curriculus, the sinilabeo, the river perches, the eriocheir hepuensis and the like.

The invention provides an arrangement method of a steel fishway structure capable of automatically pulling and stretching along with water level changes. The arrangement method comprises the steps that the water level difference of an inlet and an outlet of a fishway is monitored in real time; the buoyancy driving assembly is triggered according to the water level difference to drive the steel fishway subsections to move along the rails; calculating the telescopic length based on the water level difference and the fishway base length to ensure that the gradient is within the design range; the track motor is controlled to adjust the cable-stayed angles and gaps of the fishway sections; the gradient error is corrected in real time through the tilt angle sensor; the distribution density and the opening-closing angle of the guide plates are dynamically adjusted according to the flow speed and the water depth, and vortex is inhibited; the water temperature change is monitored, the thermal deformation compensation amount is calculated, and deformation is absorbed through the elastic sealing assembly. The fish passing rate can be increased, the adaptability and stability of the structure are enhanced, and the device is suitable for complex hydrological environments.

The present invention discloses a double-layer overpass fishway structure, belonging to the field of fishway design in water conservancy projects. The double-layer overpass design enables an upper overflow and a lower submerged flow. The water flow structure within the pool chamber is diverse and can adapt to different water depths, creating favorable hydraulic conditions for fish with different preferences. The double-layer overpass fishway comprises: a trumpet-shaped inlet section, a hump-shaped weir transition section, a double-layer overpass pool section (including a lower disc-shaped channel section and an upper overflow section), and a resting pool section. The hump weir section divides the pool chamber into an upper overflow area and a lower submerged outflow area. The formation of the upper overflow area draws jumping fish into the upper overflow weir section, while the lower submerged flow area is used to attract bottom-dwelling fish and allow them to smoothly swim upstream through the disc-shaped channel section. The arrangement of the resting pool section creates a low-flow zone to allow fish to recover their strength, thereby allowing them to successfully complete their upstream migration and ensure the stability of the river ecosystem.

The invention relates to the field of hydraulic engineering facilities, in particular to a fishway (1), a sluice and a fishway arrangement method.The fishway comprises a plurality of turn-back sections (11) which are connected in sequence and at least partially arranged on a ramp section of a stilling pool (3) at the downstream of the sluice, and the gradient of each turn-back section is smaller than that of the ramp section of the stilling pool; the bottom end of the fish migration channel is provided with a fishway inlet (13), and the top end of the fish migration channel is provided with a fishway outlet (14) communicated with the lock chamber of the water gate. And the fishes at the downstream are attracted by the water flow which flows out of the fishway and is suitable for migration, so that the fishes enter the fishway and upstream to enter the lock chamber at the upstream of the stilling pool. Due to the fact that the fishway extends into the gate chamber of the water gate in a turning-back mode, the height difference of the stilling pool is relieved in a segmented climbing mode, the water flow speed in the fishway is lower, and therefore the fishway is suitable for fish migration, and fishes can pass through the stilling pool and the water gate through the fishway.

The invention relates to the technical field of fishways, in particular to a fishway local section model test method. The method comprises the following steps: S1, drawing up a preliminary design scheme of the vertical seam type fishway; s2, designing a fishway engineering local section physical model based on the preliminary design scheme; s3, carrying out a fishway local section model test, measuring and evaluating fishway parameters, and finding out standard exceeding fishway parameters and reasons for the standard exceeding of the fishway parameters; and S4, after the reasons in the S3 are improved, the steps S2 to S4 are repeated until all the fishway parameters meet the design requirements, and a pool chamber structure recommendation scheme is formed based on the fishway parameters. According to the fishway local section model test method, the fishway section model test is carried out, parameters exceeding the standard are found, then adjustment is carried out, a pool chamber structure recommendation scheme is formed, and a theoretical experiment basis is provided for enabling a pool chamber, located on the upper stream of an eel way, on a vertical seam type fishway to meet the migration requirements of eels and eriocheir hepuensis.

The invention provides a fishway efficiency evaluation and diagnosis method and system based on AI ecological monitoring and a medium, and the method comprises the steps: firstly, collecting images, three-dimensional point clouds, water quality parameters and water flow data inside and outside a fishway in real time through the deployment of an underwater camera, a sonar, a water quality sensor and hydrological monitoring equipment, and forming multi-source heterogeneous data; secondly, through data cleaning and preprocessing and a preset AI identification technology, automatically counting the passing quantity and types of fishes; then, multi-dimensional evaluation is conducted on the fishway based on the structure, water quality, hydrology and ecology, and then the fishway health index is analyzed based on expert weight distribution; and finally, performing evaluation and problem diagnosis on the fishway energy efficiency according to the fishway health index, and generating a maintenance suggestion. According to the method, a monitoring-evaluation-diagnosis-optimization closed-loop system is constructed, dynamic management and quick response of fishway efficiency are achieved, and scientific support is provided for hydraulic engineering and ecological sustainable development.

A Taiji fishway structure includes fishway pool chamber units arranged sequentially along a water flow direction, each fishway pool chamber unit includes an curved side wall, an curved deflector, and a first longitudinal side wall, a fishway vertical partition plate, and a second longitudinal side wall provided on the same side of the fishway. A head end of the curved deflector of the i-th fishway pool chamber unit connects to a head end of the curved side wall in the (i+1)th fishway pool chamber unit, and forms a fish passage vertical slot that matches target fish body size with an end of the fishway vertical partition plate in the (i+1)th fishway pool chamber unit, and water flow of the i-th fishway pool chamber unit is ejected toward the curved side wall in the (i+1)th fishway pool chamber unit through the fish passage vertical slot.

The fishway inlet device comprises a fixed fishway, the inlet end of the fixed fishway is rotationally connected with a transition section fishway through a rotating shaft, a telescopic control device is installed on the upper portion of the other side of the transition section fishway, and the output end of the telescopic control device is connected with a telescopic mechanism. The other end of the telescopic mechanism is in sliding limiting fit with the mounting box, the lower portion of the telescopic mechanism is connected with a telescopic flexible fishway, one end of the flexible fishway is connected with the transition section fishway, the other end of the flexible fishway is connected with the mounting box, and the other end of the mounting box is connected with the inlet end fishway. According to the device, the length of the fishway can be adjusted according to the water level so that the fishway inlet can adapt to the water level, the fish luring effect can be enhanced through the fish luring device, and the fish migration situation can be monitored in real time.

The invention discloses a partition plate type fishway built on a floodplain, and relates to the technical field of fishways, the partition plate type fishway comprises a fishway and a movable cover plate, the fishway is a partition plate vertical seam type fishway, the movable cover plate is arranged at an opening in the upper end of the fishway, and the movable cover plate is detachably connected with the fishway. According to the partition plate type fishway built on the floodplain, fish migration can be achieved for a floodplain type river channel, and silt can be prevented from blocking the fishway when river water overflows the floodplain.

The present invention relates to the technical field of fish reproduction and release facilities, and specifically to an ecologically simulated fish fry wilding training fishway and a wilding training method. A water reservoir, a water supply unit, a return water unit, a fishway body, and an inlet fishway; the water supply unit is used to supply water from the water body to the water reservoir; one end of the fishway body is connected to the water reservoir through a water discharge valve, and the other end of the fishway body is connected to the water body through an inlet fishway; a water retaining gate is provided on the inlet fishway; a first resting pool, a second resting pool, and a third resting pool are provided in the fishway body; a number of stone steps are provided on the fishway body; and at least two water retaining steps are also provided. In response to the technical problem of low survival rate of released fry, the present invention is more in line with the characteristics of the wild habitat of released fish, and can train the fry's ability to adapt to natural water bodies by adjusting the flow rate and flow rate in the fishway body, meet the needs of fish wilding training, and also meet the needs of zoned breeding in the fishway body at the same time.

The application discloses a fishway with a movable baffle and belongs to the field of fishway construction in water conservancy and hydropower engineering. The fishway comprises a fixed wing plate, a movable baffle, a pushing rod bearing, a pushing ball head, a hydraulic pushing rod, a pushing rod shaft, a fixed wide baffle and an energy dissipation baffle. The fishway can help fishes with different swimming abilities to pass through a dam and shorten the passing time.

The technical solution adopted in this invention is: a composite baffle-type fishway with adaptive water level variation, comprising: a flow channel with a consistent width and slope along its length; sidewalls respectively disposed on both sides of the flow channel; and several composite baffles installed within the flow channel, the composite baffles including a first baffle and a second baffle; the first baffle is located in front of the second baffle in the direction of water flow; wherein, the first baffle is composed of two trapezoidal symmetrical baffles fixedly connected to the sidewalls and the flow channel, forming a trapezoidal vertical slit flow structure that is narrow at the top and wide at the bottom; the second baffle is a composite structure that is U-shaped in plan and trapezoidal in elevation, narrow at the top and wide at the bottom, fixed at the centerline of the flow channel; there are gaps between the two sides of the second baffle and the sidewalls, forming an inverted trapezoidal vertical slit flow structure that is wide at the top and narrow at the bottom; this invention improves the fishway's ability to adapt to water level variation, forms a stable flow field conducive to fish swimming upstream, better protects fish, and reduces the obstructive impact of dams on watershed connectivity.

The invention discloses an intelligent riverway retaining dam system based on ecological function regulation and control in the technical field of water conservancy ecology. The intelligent riverway retaining dam system comprises a retaining dam body and a server. The side, close to the shoreside, of the retaining dam body is provided with multiple stages of water pools distributed in a stepped mode, every two adjacent stages of water pools are communicated through an inclined water channel, and the server comprises an acquisition module, a data processing module and an execution module; the acquisition module is used for acquiring feature images of migrated fishes and water flow velocity in a water channel; the data processing module is used for analyzing the fish feature image through a trained deep learning algorithm, so that the water flow speed is matched with the water flow speed of corresponding fish migration; and the execution module is used for opening, closing and adjusting a gate of the fishway according to the instruction of the data processing module. According to the scheme, the problems that the flow speed of water flow of an existing fishway is unstable, and fish migration is affected are solved.

The invention relates to the field of hydropower stations, in particular to a hydropower station reservoir area fishway outlet structure and a fishway fish passing method, the hydropower station reservoir area fishway outlet structure adapts to the scene with the large reservoir area water level change amplitude and is more compact in structure, the hydropower station reservoir area fishway outlet structure comprises a fishway section, a fish lifting machine and a gate, and the position of the upstream of the fishway section is higher than the position of the downstream of the fishway section; the gate and the fish lifting machine are arranged on the upstream of the fishway section and comprise a flat slope section, the flat slope section is arranged between the fishway section and the fish lifting machine, the bottom face of the flat slope section is horizontally arranged, an inlet of the flat slope section is communicated with the fishway section, and a water inlet gate is arranged at an outlet of the flat slope section. The system is particularly suitable for hydropower stations with large reservoir area water level variation amplitude and limited fishway arrangement space.

The invention relates to the technical field of hydraulic engineering, and discloses a stepped fishway which comprises an overflow channel, flow guide plates and a water supplementing assembly, a plurality of groups of flow guide plates are arranged in the stepped overflow channel, a plurality of fishway grooves are formed by the adjacent flow guide plates and the overflow channel, and the fishway groove at the bottommost end is communicated with a downstream water body of a dam. When the flow of the river channel is in a normal range, water flows from the upstream to the downstream of the dam along the overflow channel, and flows into and fills the fishway groove; and the backtracking fishes jump from the fishway grooves in the low position to the fishway grooves in the high position step by step, and the backtracking process is completed. The water supplementing assembly is arranged, when the flow of the river channel is cut off or the flow is lower than the normal range, the water supplementing assembly starts related water supplementing work, the pump body is driven to pump downstream water of the dam, water is conveyed into the fishway grooves through the water inlet pipe, and after the water level of the fishway grooves is increased, backtracking fishes jump to the fishway grooves at the high position from the fishway grooves at the low position step by step; and the backtracking process is completed. The invention further provides a fishway water replenishing method.

The invention belongs to the technical field of fishway engineering and hydraulic simulation and calculation, and relates to a method and system for calculating hydraulic parameters of a vertical seam type fishway influenced by downstream water level change, and the method comprises the steps: S1, obtaining fishway design parameters and initial hydraulic parameters; s2, when the downstream water level changes, calculating the changed flow velocity of the first vertical seam, the changed water level of the inlet, the changed water level of the first pool chamber and the changed water depth of the first pool chamber, and taking the first pool chamber as the current pool chamber; s3, calculating the changed flow velocity of the next adjacent vertical seam and the changed water level and water depth of the next adjacent pool chamber based on the changed water level and water depth of the current pool chamber; and S4, taking the next adjacent pool chamber in the S3 as the current pool chamber, returning to the S3, continuously calculating the changed flow velocity of the next adjacent vertical seam and the changed water level and water depth of the next adjacent pool chamber until the calculation is stopped, and determining the influenced vertical seam and pool chamber and the corresponding changed hydraulic parameters. According to the method, the number of the vertical seams, the pool chambers and the hydraulic parameter change condition influenced by the downstream water level change can be determined.

The invention discloses a bionic ecological fishway capable of adjusting water flow and having an induction function, and belongs to the technical field of ecological fishways, the bionic ecological fishway comprises a dam body, two fishway protection plates are fixed on the dam body, a fishway main body is arranged between the fishway protection plates, and a flow guide mechanism used for adjusting the water flow is mounted on the inner wall of each fishway protection plate. The gate mechanism and the flow guide mechanism are installed on the fishway body, the flow guide mechanism comprises an adjusting rod, the induction mechanism comprises a feeding box, the top of the adjusting rod can drive the feeding box to rotate, and a pulse type fish blocking electric grid is installed at the position of an inlet plate, the water flow in the fishway body can be flexibly adjusted through the gate mechanism and the flow guide mechanism so as to meet the migration requirements of different fishes; through close cooperation of the flow guide mechanism and the induction mechanism, angle adjustment of the feeding box is facilitated, fish schools can be attracted into the fishway in a larger range conveniently, the impulse type fish blocking electric grid effectively blocks the fish schools, it is guaranteed that the fish schools enter the fishway according to a preset path, and the use efficiency of the fishway is improved.

The invention discloses a fishway hydraulic power and fishway structure design method and related equipment, and the method comprises the steps: obtaining swimming capability parameters of each target fish species in a target water area, the swimming capability parameters comprising an induction flow rate, a critical swimming speed and an outbreak swimming speed; selecting the target fingerling with the minimum critical swimming speed as a limited fingerling; according to the critical swimming speed corresponding to the limited fingerling, calculating a first energy consumption rate of swimming of the limited fingerling at the first hydraulic flow speed; according to the first energy consumption rate, hydraulic function partitions and space sequence layout of the fishway are determined; and determining fishway hydraulic parameters according to the induction flow velocity of each target fingerling and the critical swimming speed and the outbreak swimming speed of the limited fingerling. According to the fishway, inclusive passing of the fishway to multiple species can be achieved, the structural design of the fishway can adapt to the natural behavior rhythm of fishes, the overall energy consumption of dam passing of fish schools is remarkably reduced, then the ecological efficiency of the fishway is improved, and the fishway can be widely applied to the technical field of fishway design.

The present invention relates to a fry counting device, comprising a fish supply device, a fishway and a counting box, wherein the fishway is tilted downward as a whole, a fill light is provided at the bottom, and a host is provided at the top, wherein the host comprises a camera arranged at the bottom for photographing the internal position of the counting box, a development board arranged at the inside, and a display screen arranged at the top, and is characterized in that the fish supply device can be a pump suction type, a siphon type or a pneumatic type, and the fishway comprises an initial step channel, a middle step channel, and a final step channel connected in sequence, and the angle between the fishway and the horizontal plane decreases step by step. The stepped channel is used to gradually ease the water flow, so that the fry can be evenly distributed at the shooting position, and through different modifications of the fish supply device, it plays a role in preventing the fry from being injured, reducing human operation, and speeding up the fry counting process on the basis of ensuring the counting accuracy.

The invention discloses a fish passing structure suitable for an upstream variable water level, belongs to the technical field of fishway structures, and can solve the problem that an existing pool weir type fishway cannot adapt to upstream reservoir water level changes. The fish passing structure comprises a vertical seam type fishway; the regulating reservoir is connected to the downstream end of the vertical seam type fishway; the bottom plate elevation of the adjusting tank is the same as the bottom elevation of the downstream end of the vertical seam type fishway; an overflow port is formed in the side wall of the adjusting tank; a protective fishing net is mounted on the overflow port; the pond weir type fishway is connected to the downstream end of the adjusting pond; the bottom elevation of the upstream end of the pool weir type fishway is higher than that of a bottom plate of the adjusting pool; the bottom elevation of the overflow port is higher than the top elevation of a weir plate in the pool weir type fishway; the water discarding channel is connected to the outer side of the side wall, provided with the overflow port, of the adjusting tank, and water higher than the bottom elevation of the overflow port in the adjusting tank is discharged through the water discarding channel. The invention is used for the pool weir type fishway.

This invention provides a method for fish passage behavior recognition based on a multimodal large model. First, imaging sonar image sequences and underwater optical video sequences of fish passing through fish passages or facilities are simultaneously acquired, and the multimodal data are aligned through time stamp synchronization and spatial calibration. Then, fish target detection, segmentation, and feature extraction are performed on the sonar image sequences and optical video sequences respectively to obtain the fish's spatial location, body length, water depth, motion state, morphological structure, and posture features. The obtained acoustic and optical features are input into a multimodal coding and fusion model based on the Transformer architecture, and a unified fish behavior representation vector is constructed through a cross-modal attention mechanism. During the training phase, model parameters are adjusted through a multi-task learning approach using cross-entropy loss, mean squared error loss, and contrastive learning loss, ultimately achieving fish passage behavior category recognition and prediction of individual and group passage difficulty scores.

The application discloses a non-constant flow water-saving type flipper step type fishway and a fish migration method. A plurality of flippers are arranged in the fishway body along the length direction of the fishway body. Each flipper transversely divides the fishway body, thereby forming a plurality of migration pools surrounded by two adjacent flippers. The elevation of the upper end of each flipper gradually decreases along the water flow direction. All the flippers can connect or disconnect the adjacent migration pools. The first flipper, the second flipper, the third flipper and the like are opened and closed in turn according to the set rhythm until the uppermost flipper. The fish enters the upper migration pool in the opening process of the flipper and migrates step by step, thereby realizing the fish flip. The application basically has no requirement on the swimming ability of the fish. The drop water formed in the opening process of the flipper has an attracting effect on the fish, is very beneficial to the fish migration, and the water flow for realizing the migration is smaller than that of the existing fishway.

The present application provides a kind of fish collection and fish luring system of fish passage, including fish blocking electric fence and fish passage;Fish passage is set in the downstream of dam and is close to the shore side, and the one end of fish passage is provided with water inlet, and the other end of fish passage is provided with water outlet, and water inlet is towards the water outlet of dam;Fish blocking electric fence is fixedly connected in the water outlet side away from the shore and extends along the direction away from water inlet, and fish blocking electric fence is used to form electric field below water surface.Combining fish blocking electric fence electric field drive, fish counter-current upstreaming habit and near-shore swimming law, fish group is accurately guided to enter fish passage, and fish luring effect is strengthened with fish luring lamp, to solve the problem of low efficiency of traditional passive phototaxis fish luring.Collaborate water level sensing device and lifting mechanism, can automatically adjust the height of electric fence according to real-time water level, to ensure that electrode stick is always in the main upstreaming water layer of fish, and electric field fully covers effective water layer, without manual intervention.

The present application belongs to the technical field of hydraulic engineering and environmental protection engineering facilities, and particularly relates to an ecological flow releasing facility with a fishway and a construction method thereof. The present application is directed to the reconstruction and expansion of hydraulic engineering with ecological requirements. The fishway and the ecological flow releasing system adopt a short tunnel around dam scheme, which has little influence on other buildings of the hub. Rock plug is used for water retaining, and the installation of the water retaining gate is completed before the flood season, thereby avoiding the risk of flood control during the construction period due to the increase of the retaining and releasing water buildings caused by the reconstruction and expansion. The overall layout of the fishway engineering and the ecological flow releasing facility is considered, the tunnel section adopts the layout of the fishway on the top and the ecological releasing pipe on the bottom, the tunnel section type is beneficial to the stability of the surrounding rock, the construction difficulty is small, and the excavation and support amount is small. The tunnel section adopts a sunlight fiber optic introduction system for lighting, which can make the fishway tunnel section more close to the natural conditions, and the adverse effects of the fishway tunnel section engineering on fish migration are minimized.

The invention relates to the technical field of water conservancy and hydropower ecological protection, in particular to a fishway with a traffic function and an operation method of the fishway. Each spliced fishway comprises a fixed fishway section and rotary fishway sections arranged at the upstream end and the downstream end of the fixed fishway section; connecting bridges are respectively arranged in the river channels on the upstream side and the downstream side of the dam body; a tempered glass plate is laid on the top of the rotary fishway section. When the rotary fishway section rotates to be in a butt joint state with the connecting bridge, the rotary fishway section and the connecting bridge are spliced together to form a bridge body. In a fish passing season, the rotary fishway sections are spliced at the two ends of the fixed fishway section to form a spliced fishway for executing a fish passing mode; and in a non-fish passing season or other time periods where fish passing is not needed, the rotating fishway section is rotated to be in a butt joint state with the connecting bridge, and the rotating fishway section and the connecting bridge are jointly spliced to form a bridge body for executing a traffic mode.

This invention relates to the field of data processing technology, specifically to a method for evaluating the effectiveness of fish passage in an eco-friendly fishway based on multi-factor analysis. The method involves acquiring multi-dimensional data, a multi-factor evaluation calculation model, and engineering parameters of each batch of fish swimming through a test section within each monitoring period. In each period, the theoretical environmental pressure rate is calculated using the model based on water temperature and flow velocity sequences. The total time consumed is compared with a preset baseline time to determine the energy consumption index. Effective swimming weights are determined by combining the deviation of the swimming trajectory time series and engineering parameters, reducing the weight of ineffective time consumption data in the backwater rest area. Multiple indicators from all batches of fish are integrated to determine long-term evaluation deviation indicators, and effective error periods are selected. An environmental parameter constraint space is constructed, and relevant data from each batch of fish within the effective error period are used for traversal optimization to eliminate data contamination in the rest area and improve the model's adaptability and predictive accuracy to different environments and fish states.

This invention belongs to the field of ecological restoration technology in water conservancy engineering, specifically involving a fishway inlet centralized layout and natural fish-guiding structure adapted to large-amplitude water levels. It includes a fishway inlet group centrally arranged along the bank slope of the tailrace channel of a power plant, a vertically slit-type fishway main body, and a water replenishment and control system. The inlet group comprises multiple independent inlets arranged along an elevation gradient. Elevation differences are offset by fishway sections with a reversible structure, ensuring all inlets are centrally located within a certain range in the core fish-gathering area. The water replenishment and control system's flow rate is inversely correlated with the real-time water depth and natural flow rate within the fishway. Combined with the natural flow field of the tailrace channel, a natural fish-guiding path without a cross-river electric guide is constructed. This invention solves the problems of dispersed inlets, ecological stress in fish-guiding methods, and disconnected water replenishment and control logic in traditional designs. It achieves precise matching between the inlets and the natural migration paths of fish, significantly improving fish passage efficiency.

The invention provides a fishway and dam integrated device integrating multi-depth entrances and exits and multi-direction water replenishing and fish luring and an operation method, and belongs to the technical field of fishways. The device comprises a gravity dam section, a stepped fishway integrated in the gravity dam section and a water replenishing pipeline pre-buried in a wall body of the gravity dam section; the upstream side and the downstream side of the gravity dam section are provided with multi-elevation entrances and exits and matched gates respectively, a fishway bottom plate and partition plates of the stepped fishway are distributed in a stepped mode, and the water supplementing pipeline is provided with multi-direction water supplementing sprayers around the fishway entrance. According to the operation method, through cooperative opening and closing of multi-depth inlets and outlets, multi-direction and multi-flow-speed fine regulation and control of water supplementing nozzles, stepped fishway energy dissipation and flow aiding and dam water retaining mode switching, fishway and dam structure function integration is achieved. Extra land acquisition and pouring are not needed, the engineering cost and construction difficulty are reduced, the method can adapt to dynamic changes of the water level of the reservoir, migration depth preferences of different fishes are considered, the fish luring and passing efficiency is improved, and the fish passing window period is prolonged.

The application discloses a long-distance vertical-seam type fishway structure and an operation method thereof and belongs to the technical field of water conservancy and hydropower ecological protection. The structure comprises a dam and a vertical-seam type fishway. A fish collecting box lifting conveyor is arranged in one fishway side wall of a straight line section of the vertical-seam type fishway. A fish collecting box conveying mechanism for conveying fish collecting boxes in a long partition plate of the straight line section of the vertical-seam type fishway to the fish collecting box lifting conveyor is arranged in the long partition plate and the one fishway side wall. A fish collecting box returning mechanism for returning empty fish collecting boxes falling from the fish collecting box lifting conveyor to the long partition plate is arranged in the long partition plate and the one fishway side wall. Fishes can be lifted from a downstream section of the vertical-seam type fishway to an upstream section of the vertical-seam type fishway. The fishes in a fishway pool chamber can reach a dam upstream reservoir without experiencing long-distance internal migration, and the fish passing effect and efficiency of the vertical-seam type fishway are improved.