33 results about "Fish habitat" patented technology

The invention relates to the field of fish habitat evaluation, in particular to a spawning migration type fish full life history stage suitable habitat inversion method based on a hydrodynamic model, and the method mainly comprises the steps: (1) collecting spawning migration type fish data, hydrological data and topographic data; (2) determining life history stages of the fishes and the actual number of the fishes; (3) establishing one-dimensional hydrodynamic models of different life history stages; (3) grouping the water depth and the flow velocity of each life history stage, and calculating the number frequency of fishes in each interval; (4) constructing a habitat suitability curve of water depth and flow velocity; and (5) evaluating a suitable habitat. According to the method, the suitable habitat of the spawning migration type fish in the whole life history stage can be efficiently and accurately evaluated, and protection strategy formulation and measure implementation of aquatic organisms are facilitated.

This invention provides a method and system for rapidly evaluating the suitability of fish habitats for various environments based on deep learning, which belongs to the field of river ecology technology. [Solution] The method includes the steps of: conducting a simulation using a physical mechanism model of fish habitat suitability, obtaining evaluation results of the physical mechanism model of fish habitat suitability in the river channel corresponding to various flow rate conditions, and constructing a sample set for learning fish habitat suitability; training a pre-constructed deep learning model for predicting fish habitat suitability in the river channel using the sample set for learning fish habitat suitability; and identifying the flow rate influence sensitivity range and constructing a sample set for incremental learning fish habitat suitability.

This invention discloses a method for creating fish habitats based on swarming effects, belonging to the fields of fish ecological engineering and water conservancy engineering. Existing technologies for creating fish habitats suffer from incomplete quantification of swarming behavior and a lack of quantitative correlation with engineering design parameters, leading to habitats that are difficult to match the needs of fish swarming. This invention quantifies spatial aggregation, movement synchronization, and turbulent adaptability, calculates a comprehensive swarming index and a group spatial demand coefficient, establishes a direct conversion model between swarming behavior indicators and habitat design parameters, and determines flow field control methods and structural layout methods based on the comprehensive swarming index and the group spatial demand coefficient, thereby creating fish habitats. This invention can comprehensively characterize swarming behavior, scientifically guide engineering design, and improve habitat applicability and utilization.

The invention discloses a method for evaluating fish habitat and ecological flow regulation and control based on a data-driven fuzzy model, belongs to the field of water conservancy and hydropower engineering environmental protection and ecological hydraulics, and particularly relates to a method for evaluating fish habitat and ecological flow regulation and control. According to the method, a hydraulic parameter membership function is automatically deduced from on-site fish behavior observation data through a fuzzy C-means clustering (FCM) algorithm, a fuzzy rule base is constructed, a habitat suitability index (HSI) model under the synergistic effect of multiple factors such as water depth and flow velocity is established, and an environment flow threshold value based on weighted available area (WUA) maximization is output. According to the method, the defects that a traditional habitat model excessively depends on expert experience and multi-factor interaction processing is insufficient are overcome, objective quantification of model parameters and accurate capture of a complex nonlinear relation are achieved, quantifiable and species-specific decision support is provided for cascade reservoir ecological scheduling, and the method has the advantages of being high in practicability and easy to popularize. And hydroelectric benefits and ecological protection requirements are effectively balanced.

The invention discloses a river habitat index determination method based on vorticity and fish energy consumption coupling, and the method comprises the steps: firstly extracting the geometric features of a river bed, vegetation and reefs, and constructing a fish habitat physical model; three types of vorticity coefficients are obtained through tests and calculation, and the total vorticity is obtained through quantification and superposition; calculating actual energy consumption in combination with fish cruise basic energy consumption and a vorticity correction coefficient, and obtaining energy consumption and vorticity suitability indexes through an exponential function; and finally, constructing a comprehensive suitability index by adopting a geometric mean function, formulating a grading standard, and realizing habitat suitability judgment. The method is suitable for river habitat heterogeneity and hydrological dynamic changes, suitable habitats can be identified, targeted design of repair measures is achieved, regulation and control indexes are provided for fish habitat design of water conservancy and channel engineering, result reliability and repeatability are guaranteed by means of standardized processes and multi-source verification, and the method is suitable for popularization and application. Fish habitat protection and ecological function recovery in the area are facilitated.

The utility model discloses a rice fish comprehensive breed field fish class habitat sheltering device, concretely relates to aquaculture technical field, including sheltering shell, and the both ends of sheltering shell are connected with the habitat shell, and one habitat shell top fixedly connected with sunshading board, and the bottom of another habitat shell is fixedly connected with connecting plate, and the one side of sheltering shell and habitat shell is equipped with the entrance, and the other side of sheltering shell and habitat shell is equipped with the export, and the inside of sheltering shell and two habitat shells are fixedly connected with a plurality of baffle, and the inside of sheltering shell and habitat shell is penetrated with the feeding pipe. The utility model discloses through setting up feeding subassembly and installing mechanism, can combine feeding with oxygen -enrichment, can carry out oxygen -enrichment simultaneously in the feeding process, and sufficient water dissolved oxygen content helps fish to keep active feeding state, and simultaneously through the spiral effect of spiral blade can increase the contact area of field soil, help to keep the good stability of sheltering shell and two habitat shells in the use process.

The invention relates to the technical field of fish ecological protection, and discloses a fish habitat building device which comprises an inhabiting assembly and a connecting assembly, the inhabiting assembly comprises a main frame, inlet assemblies and a travel assembly, the interior of the main frame is a cavity, a plurality of mounting ports are formed in the main frame, and the inlet assemblies are correspondingly mounted on the mounting ports; the inhabiting assemblies are installed on the mounting openings, the entering assembly is suitable for fishes to enter the inhabiting assemblies, the outgoing assembly is installed on one of the mounting openings, the outgoing assembly is suitable for fishes to swim out of the inhabiting assemblies, and the connecting assembly is detachably connected with the outgoing assembly on the inhabiting assemblies. The impact force of water flow on a single structure is reduced, the multiple fixing structures ensure that the whole structure is not prone to loosening under the action of the water flow after assembly, the long-term stability of the structure is improved, the arrangement scale can be flexibly adjusted according to the water area after dam disassembly, and the large-range habitat restoration requirement is met.

The present application relates to the technical field of computer, especially to a method for quickly evaluating the influence of reservoir regulation on the fish habitat area in the downstream. The method comprises the following steps: obtaining the natural environment data of the river channel in the area to be studied; checking out the boundary of the area to be studied, generating a triangular mesh and performing mesh smoothing processing; obtaining a triangular mesh graph with elevation interpolation surface data; constructing a two-dimensional hydrodynamic model; selecting a variety of water level and flow rate working condition combinations, simulating the hydrological and hydrodynamic characteristics of the downstream river channel, extracting water depth and flow rate surface data as key environmental factors, and exporting the mesh data of the simulation results; using binary classification method to binarize the environmental factors, determining the proportion of the number of meshes within the range of the key environmental factors in the total number of meshes, and obtaining the fish habitat area in the downstream river channel under various reservoir regulation combinations. The present application can quickly evaluate the spatial distribution of the fish habitat in the downstream river channel affected by reservoir regulation.

The utility model provides a kind of fish nest row component of air-permeable grating, including frame structure, the frame structure is provided with baffle, the baffle is separated into multiple hollow chambers by fish nest row frame body;The frame structure is provided with at least two first through holes in the direction of water flow, the baffle is provided with second through hole in the direction of water flow, the first through hole of the upstream frame structure is equipped with hole-plugging structure, when water flow is big, it can be washed away and the silt in chamber by hole-plugging structure being washed off, by being equipped with first through hole on frame structure, second through hole is set on baffle, hole-plugging structure is set in first through hole, when water flow is relatively small, hole-plugging structure and frame structure form a closed buffer area, it is favorable for fish habitat, when water flow impact force is greater than torsional spring elastic force, water flow can wash away hole-plugging structure, so that the silt in the inside of frame structure is taken away.

The application discloses a kind of fish habitat dynamic suitability evaluation method, consider the dynamic change characteristics of annual non-constant water depth, flow rate, water temperature and other habitat habitat factors of river, according to the dynamic response curve of habitat factor change of fish habitat suitability, the change process of each region suitability and weighted available area in year is calculated in river, on this basis, the number of days suitable for each region in fish spawning stage in river is counted, the time satisfaction coefficient and suitable time duration days located in the interval of suitability are calculated, and the annual change curve of dynamic suitability total area is described.Through the above calculation method, the adaptability of fish spawning stage to river in the whole year can be more reasonably evaluated, so as to more scientifically guide the operation of ecological regulation.

The application discloses a kind of fish fattening field suitable ecological flow and system of deducing method, including the following steps: constructing the index system of hydraulic habitat of fattening field for quantifying habitat patch spatial heterogeneity, the hydraulic habitat index value of different flow conditions is analyzed and calculated using two-dimensional hydrodynamic model in the study water area, the flow corresponding to the most suitable hydraulic habitat index value of the fish habitat studied is selected as the suitable ecological flow of fattening field.The present application not only considers the target organism but also considers other organisms in the river, and is more conducive to creating suitable flow conditions for multiple species coexistence, and has certain scientific significance and reference value for fish fattening field protection and ecological restoration.

The invention discloses a fish habitat building method based on a group swimming effect, and belongs to the field of fish ecological engineering and hydraulic engineering. In the prior art, the fish habitat building has the problems that the quantification of the fish habitat is not comprehensive, and the association with the quantification of engineering design parameters is lacked, so that the habitat is difficult to match the fish swarm swimming demand. According to the method, the space aggregation degree, the motion synchronism and the turbulence adaptability are quantified, the comprehensive cluster index and the group space demand coefficient are calculated, a direct conversion model of group travel as an index and habitat design parameters is established, and the flow field regulation and control mode and the structural layout mode are determined based on the comprehensive cluster index and the group space demand coefficient. Therefore, a fish habitat is built. According to the method, group travel behaviors can be comprehensively described, engineering design is scientifically guided, and the applicability and utilization rate of the habitat are improved.

The invention provides a watershed fish habitat matching method and system based on model simulation, and the method comprises the steps: obtaining environment monitoring data of different monitoring points in a watershed in a preset time period, and constructing a watershed environment scene data set in combination with the landform basic data of the watershed; performing multi-dimensional feature analysis processing on the data set to generate a fish habitat demand feature set; performing cross-scale feature matching based on the environment feature evolution sequence and the fish habitat demand feature set, and constructing a habitat suitability incidence matrix; performing space-time planning processing on the habitat suitability incidence matrix to generate a habitat suitability index distribution map; and determining an optimal habitat space range of the target fishes, performing ecological protection priority ranking on the optimal habitat space range, and generating a watershed fish habitat planning result. According to the invention, the practicability and pertinence of the planning result of the watershed fish habitat are improved.

The present application relates to the technical field of fishery resources monitoring, in particular to a method suitable for big water surface group monitoring and counting of aar fish, according to the type of water area, the grid dynamic distribution of acoustic signal receiving station is carried out, the joint positioning method of more than three points based on TDOA, combined with the weighted least square method to calculate the accurate coordinate of the marked aar fish, and the behavior of the aar fish is judged, so as to master the activity area of the individual fish after the individual fish cluster through the marking of the individual fish, combined with the water depth, water temperature and water quality data, the characteristics of the fish habitat are obtained, and the fish activity range and rule are obtained. Based on the behavior habit of fish, the monitoring range is divided, the population monitoring and counting are carried out through the fish sonar scanning, the problems of big water surface fish population monitoring difficulty and fish population repeated counting are reduced, and the precision of the monitoring and counting result is improved. The scheme of the present application has the characteristics of non-damage, full coverage, high precision and standardization, and is suitable for big water surface aar fish resource investigation, evaluation of aar fish population release effect and ecological fishery management.

The invention discloses a fish school suitability index weight determination method and system, electronic equipment and a computer readable storage medium, and belongs to the technical field of water conservancy and hydropower development fish habitat protection. The method comprises the following steps: step 1, acquiring a hierarchical structure diagram of fish school suitability indexes; step 2, constructing a judgment matrix of each layer in the hierarchical structure diagram; 3, according to the judgment matrix of each layer, determining the initial weight of each element in each layer to the previous layer; and step 4, determining the weight of each index value in the fish school suitability index based on the initial weight of each element in each level to the previous level. Weighted values are accurately given to different indexes to reflect the relative importance degrees of the indexes, so that the accuracy and effectiveness of the fish school habitat evaluation result are ensured.

The utility model discloses a simple artificial fish habitat system suitable for a tidal river channel, which is characterized in that a pit is arranged on a riverbed of the tidal river channel as a main body, and a water inlet and a water outlet of the pit are respectively provided with a stepped retaining dam; compacting the bottoms of the pits, laying clay on the bottoms and side walls of the pits, and arranging natural stones on the surfaces of the clay; a water area corresponding to the bottom of the pit is a deep water area for planting submerged plants; the water area corresponding to the side wall of the pit is a shallow water area, and shallow water plants are planted; the cement block stone wall of the stepped retaining dam is vertically inserted into a riverbed to be fixed and is higher than the riverbed; the natural stones are arranged at the top end and on the two sides of the cement block stone wall, and the gravel is arranged between the natural stones. The device can effectively capture and store water during water recession, and ensures that aquatic organisms have enough inhabiting space during tidal variation.

The fishway is suitable for multi-target fish habitat water layer habit and comprises a groove composed of a fishway side wall and a fishway bottom plate, a plurality of pairs of partition plates are arranged at intervals in the interior of the groove, two plate bodies of each pair of partition plates are arranged at intervals to form a vertical slit, a water baffle and a driving device are further included; a rotating shaft is fixedly connected to the bottom of each pair of partition plates, the long side of the water baffle is fixedly connected to the rotating shaft, and the water baffle is perpendicular to the partition plate; an overflow port is arranged on the water baffle; the two ends of the rotating shaft are rotatably installed on the fishway side walls on the two sides of the groove; the plate body on the partition plate is a folding plate structure, a concave-convex structure is arranged in the folding plate; the driving device is installed on the groove and is used for driving the opening and closing of the plate body, and driving the rotation of the partition plate and the water baffle around the axis of the rotating shaft. The fishway realizes the change of the internal space structure of the fishway and realizes the mutual transformation of the vertical slit type fishway and the overflow weir type fishway.

A method for evaluating a habitat of fish laying adhesive eggs based on a water level fluctuation suitability index relates to a fish habitat evaluation technology, and the method specifically comprises the following steps: carrying out multi-source data acquisition, including hydrological data, topographic data, fish early-stage resource data and remote sensing image data; based on fish early-stage resource survey data, determining preference threshold values of the target fish for the flow velocity, the water depth, the substrate and the water temperature; a water level fluctuation suitability index model is constructed, and the stress effect of the water level fluctuation amplitude, frequency and duration on roe incubation is quantified; the habitat preference index and the two-dimensional hydrodynamic model are combined, and hydrodynamic characteristics of the spawning site under different water level scenes are simulated. According to the method, accurate assessment of the ecological risk of the habitat in the reservoir area is realized by quantifying the influence of water level fluctuation on the whole process of spawning and hatching of the viscous egg fishes and through multi-source data fusion, machine learning modeling and high-precision hydrodynamic simulation.

The application provides a method for improving fish habitat environment by increasing diatom attachment growth, comprising the following processing steps: S1, placing a carrier as an attachment medium in water; S2, adding a heteropolysaccharide substance on the carrier; S3, after adding the heteropolysaccharide substance for 10-50 days, a biofilm appears on the carrier, and the biofilm contains abundant algal attachment. The application promotes the attachment growth of diatoms, green algae and other sinking algae on the surface of the carrier by placing the carrier with a bearing surface in water and adding a heteropolysaccharide substance, and by controlling the light receiving depth, attachment area and heteropolysaccharide concentration of the carrier in water. The method promotes the attachment growth of diatoms and other algae by using the heteropolysaccharide and nutrient salts in water, realizes the absorption and utilization of nutrient salts such as nitrogen and phosphorus in water, obtains attached algae such as diatoms, and achieves the purpose of improving the fish habitat environment. The application is suitable for different water environments such as seawater, freshwater and brackish water.

The invention discloses a riverway intersection fish inhabitation suitability evaluation method, which comprises the following steps: measuring three-dimensional topographic data of a riverway intersection, and calculating an intersection angle theta between a main stream and a branch stream; the method comprises the following steps: forming representative three-stage hydrological data of rich, flat and dry rivers of main and branch rivers, and calculating a ratio q of branch flow to main flow flow; a three-dimensional hydrodynamic mathematical model of the river channel intersection is established, three-dimensional distribution of the hydrodynamic index water depth H of the intersection, the flow velocity V of the intersection and the vorticity intensity omega is calculated, then the relative water depth h is calculated, and the relative flow velocity v is calculated; according to the ecological habits of target fishes, a dynamic weight function of three elements of water depth, flow velocity and vorticity intensity is established, and a comprehensive index W (t) is obtained; calculating spatial-temporal distribution of a comprehensive index W (t) according to spatial-temporal changes of the relative depth h, the relative speed v and the vorticity intensity omega; the method can be used for different physiological stages and different hydrological parameter conditions of fishes, and the application range is widened.

The present application relates to the technical field of marine ecological information, and discloses a habitat suitability prediction method and system for marine ecological management, wherein the habitat suitability prediction method for marine ecological management comprises the following steps: obtaining fisherman traditional knowledge data, converting audio data into text format through natural language processing technology, and generating a traditional knowledge graph containing the corresponding relationship between observation characteristics and fishing results; performing canonical correlation analysis on the surface observation characteristics in the traditional knowledge graph and vortex physical parameters, and converting the traditional knowledge into quantitative expression in the vortex parameter space based on a mapping matrix; and integrating multiple source prediction results by using a random forest, taking the traditional knowledge data and the physical model calculation results as input characteristics, and outputting a middle-layer fish habitat probability distribution map. The present application solves the technical problem that traditional knowledge and vortex physical models are difficult to effectively integrate for middle-layer fish habitat prediction.

The invention discloses a multi-scale self-adaptive plant ecological floating bed system for creating a fish habitat in the field of ecological floating beds, which comprises a fixed unit mounted on a riverbed and a floating bed unit comprising a plurality of planting units arranged in an array, and the planting units are connected through hinge devices; the planting unit comprises a floating plate and a planting basket, and the floating plate and the planting basket are connected through a telescopic device; the acquisition unit comprises a water level sensor and a water quality sensor; the control unit is connected with the water quality sensor, the water level sensor and the telescopic device. According to the multi-scale self-adaptive plant ecological floating bed system for creating the fish habitat, the planting unit adopts a submerged plant-emergent aquatic plant-floating leaf plant ternary coupling design, so that the ecological space is fully utilized; the planting baskets provide conditions for spawning, juvenile rearing and bait rearing of fishes, the adjacent planting land units are connected through the hinge devices, the floating bed can be rapidly and flexibly recycled or expanded, and the environmental adaptability of the system is improved.

The fish habitat repairing device comprises a floating block and a planting plate which is arranged at the top of the floating block and used for planting plants, and a buffer limiting assembly is arranged between the floating block and the planting plate; the buffer limiting assembly comprises a connecting block, a connecting column, a gear moving structure, a first electric push rod, a moving plate and a limiting structure, the connecting column is arranged in the middle of the floating block, the top of the connecting column is fixedly connected with the bottom of the planting plate, the connecting block is used for connecting the adjacent floating block and the connecting column, and the gear moving structure is arranged in the connecting block to disperse impact force borne by the floating block and the planting plate; the moving plate is slidably connected to the bottom of the planting plate and located between the floating block and the planting plate, the first electric push rod is arranged on the floating block and is in driving connection with the moving plate, and the limiting structure is used for fixing the floating block and the planting plate; the device has the advantages of being high in impact resistance, capable of flexibly adjusting the height and posture, reliable in fixation, convenient and fast to maintain and capable of achieving autonomous power supply.

The application discloses a multifunctional fish habitat device for river bank protection and relates to the technical field of habitat modules. The device comprises a support base, a plurality of support columns arranged on the top of the support base, and a planting sleeve arranged on the top of the support base and sleeved on the outer circumferential side of the support columns. A planting cavity is formed between the inner circumferential side wall of the planting sleeve and the outer circumferential side wall of the support columns. A plurality of planting holes are formed in the outer wall of the planting sleeve for plants to grow out. The support columns protrude from the planting sleeve, and the bottom of the support base is provided with an insertion groove for the insertion of the support columns. The application can improve the effect of ecological management of the fish habitat module.

The application discloses a river habitat index determination method based on vorticity and fish energy consumption coupling, which comprises the following steps: firstly, extracting the geometric characteristics of the river bed, vegetation and reefs, and constructing a physical model of fish habitat; secondly, obtaining three types of vorticity coefficients through experiments and calculations, quantifying and superimposing to obtain the total vorticity; then, combining the fish cruise basic energy consumption and the vorticity correction coefficient to calculate the actual energy consumption, and obtaining the energy consumption and vorticity suitability index through an exponential function; finally, adopting a geometric mean function to construct a comprehensive suitability index, formulating a grading standard, and realizing habitat suitability determination. The method is suitable for river habitat heterogeneity and hydrological dynamic change, can identify suitable habitat and target design repair measures, provides regulation indexes for fish habitat design of water conservancy and waterway engineering, relies on a standardized process and multi-source verification to guarantee the reliability and repeatability of the results, and helps the protection of fish habitat and the recovery of ecological function in the region.

The invention provides a fish habitat data identification method and device based on a Bayesian network, and a medium, and the method comprises the steps: carrying out the time-space correlation analysis of multi-source heterogeneous data collected in a fish habitat monitoring process, and determining the potential dependence relation and influence intensity characteristics between different environment variables through data correlation mining; a multi-level Bayesian network topological structure is constructed based on the historical habitat sample data set and the ecological priori knowledge, parameter optimization is performed on a conditional probability table of the multi-level Bayesian network topological structure in combination with the historical habitat sample data set and the ecological priori knowledge, and a habitat evaluation network model is generated; inputting habitat monitoring data collected in real time into the model for uncertainty reasoning, and generating a joint probability distribution matrix in a habitat factor combination state; and performing matching degree analysis according to the matrix and a preset ecological function partitioning standard, and outputting a habitat data recognition result set containing habitat type identifiers and main stress factors. According to the invention, the accuracy and comprehensiveness of fish habitat data identification are effectively improved.

This invention discloses a multi-objective optimization method for fish habitat restoration projects based on reservoir scheduling constraints. It relates to the field of habitat restoration technology and addresses the technical problems of existing technologies, such as poor climate adaptability, reliance on experience, unsustainability in mountainous rivers, conflicts with reservoir scheduling, insufficient connectivity, difficulty in ensuring long-term restoration effects, and difficulty in significantly improving the accuracy of fish habitat restoration while ensuring the safe and efficient operation of reservoirs. The method employs CMIP6 climate downscaling hydrological prediction, embedding rigid constraints of reservoir scheduling, quantitative modeling of habitat suitability, collaborative evaluation of vertical and horizontal connectivity, dynamic coupling of sediment-landform habitats, and the NSGA-III algorithm for solving multi-objective optimization and closed-loop monitoring and evaluation. Combining the ecological habits of target fish species, such as temperature orientation, migration, reproduction, and foraging, a habitat hydraulic index-habitat suitability response model is constructed to assess the impact of key factors such as flow velocity, water depth, water level, and water temperature on the habitat.

The invention discloses a multifunctional fish habitat device for riverway slope protection, and relates to the technical field of habitat modules, the multifunctional fish habitat device comprises a supporting seat, and a matrix groove is formed in the top of the supporting seat; the multiple supporting columns are arranged on the top of the supporting base; the planting sleeve is arranged at the top of the supporting base and arranged on the peripheral side of the supporting column in a sleeving mode, a planting cavity is formed between the inner peripheral side wall of the planting sleeve and the outer peripheral side wall of the supporting column, and a plurality of planting holes allowing green plants to penetrate out are formed in the outer wall of the planting sleeve; the supporting columns protrude out of the planting sleeve, and inserting grooves allowing the supporting columns to be inserted therein are formed in the bottom of the supporting base. The ecological management effect of the fish habitat module can be improved.

The invention relates to the technical field of water conservancy ecological engineering and river ecological management, and discloses a fish habitat connectivity assessment method based on swimming ability and river environment, which comprises the following steps: calculating and storing the directivity connectivity probability between adjacent grid units in a grid topology network, constructing a connectivity probability model, and calculating the connectivity of the adjacent grid units in the grid topology network; and calculating the connectivity probability of each grid unit and other grid units in the habitat, and carrying out weighted average on the connectivity of all the grid units to obtain the overall habitat connectivity level of the target fish. According to the method, on the basis of a grid unit, a habitat river network is finely divided, the connectivity degree of fishes at any position of a habitat can be described on a finer spatial scale, the spatial resolution of connectivity analysis is improved, meanwhile, the directivity of fish movement is fully considered, forward flow and reverse flow migration modes are distinguished, and the accuracy of fish connectivity analysis is improved. When the connectivity probability between the grid units is calculated, quantification is carried out in combination with the specific river flow velocity and the fish moving direction, and a more accurate connectivity result is obtained.