94 results about "Fish habitat" patented technology

The invention relates to the technical field of fish habitat treatment, in particular to a river fish habitat restoration method based on stair dam dismantling, which comprises the following steps: acquiring stair dam parameters, hydrological data and fish habitat demand data of a target river; constructing a habitat suitability curve, a habitat suitability index and an effective habitat area model of the fish habitat before dam dismantling; designing a plurality of groups of stair dam dismantling schemes, and simulating hydrological condition changes after dam dismantling in combination with a hydrodynamic model; according to the method, habitat suitability curves, a weighted available area method and river connectivity indexes under different dam dismantling schemes are calculated, a multi-objective optimization model is established to screen an optimal scheme, ecological benefits and engineering cost are comprehensively considered, the optimal dam dismantling scheme can be scientifically selected, a dam body with the maximum contribution to improvement of the ecological benefits is preferentially dismantled, and the dam dismantling efficiency is improved. And meanwhile, part of the dam foundation is reserved to reduce the influence of sediment discharge on the downstream, so that the engineering cost is reduced to the maximum extent while the ecological restoration target is achieved.

The invention relates to the technical field of mountainous river fish habitat habitat restoration, and relates to a mountainous river fish habitat restoration method based on numerical simulation optimization, comprising: acquiring habitat data of a mountainous river fish habitat, and performing preliminary ecological restoration measures on the mountainous river fish habitat; constructing a numerical simulation model to predict the erosion and deposition evolution result of the fish habitat in the mountain river after the preliminary ecological restoration in a set period, and identifying an area of which the erosion and deposition evolution degree meets a preset threshold value in the set period; and carrying out riverbed substrate transformation on the identified area based on the target fish, evaluating the habitat improvement effect under the combined action of the preliminary ecological restoration measure and the riverbed substrate transformation through a habitat suitability model, and completing the restoration of the fish habitat in the mountain river based on the evaluation result. According to the method, dredging, spur dike and substrate transformation are combined, and numerical simulation optimization is combined, so that the effectiveness, continuity and scientificity of restoration of the fish habitat in the mountain river are improved.

The invention belongs to but is not limited to the technical field of ecological environmental protection, and discloses a river fish habitat connectivity assessment method, which comprises the following steps: collecting historical site data of target river fish and bioclimatic data influencing river fish distribution to establish a variable set; the method comprises the following steps: screening variables without collinearity by utilizing VIF, constructing a species distribution model of fishes in a target river by utilizing a machine learning algorithm, and screening environmental factors with relatively high contribution degree of the model; according to a machine learning sub-model selected by AUC and TSS, establishing a set model and simulating HS of target river fish habitat suitability distribution; dam information of the target evaluation drainage basin is collected, and a tree connectivity index (DCI) is calculated; stacking the HS and the DCI, calculating a habitat connectivity index (FRCI) of the fish in the target river, and evaluating the habitat connectivity. According to the method, the habitat suitability, the structure connectivity and the function connectivity are considered, the credibility and the preciseness of evaluation of the habitat connectivity are improved, and a scientific basis and a practical tool are provided for protection and management of a river ecosystem.

The invention discloses a method for evaluating the dynamic suitability of a fish habitat, which considers the characteristic that habitat habitat factors such as annual non-constant water depth, flow velocity and water temperature of a river have dynamic changes, and evaluates the dynamic suitability of the fish habitat according to a dynamic response curve of fish habitat suitability to habitat factor changes. Calculating the suitability of each region in the river and the change process of the weighted available area in the year, on this basis, counting the suitable days of each region in the river in the fish spawning stage, calculating the time satisfaction coefficient in the suitability interval and the duration days of the suitable time, and describing the change curve of the dynamic suitability total area in the year. According to the calculation method, the adaptability of the fish spawning stage to the river in the whole year can be more reasonably evaluated, so that the operation of ecological scheduling is more scientifically guided.

The invention discloses a reservoir ecological flow configuration method based on multi-section water transfer and multi-target fish collaborative protection, which comprises the following steps: S1, determining a hydrological sensitive area and an ecological sensitive area based on water transfer influence constraint and fish resource distribution data, superposing the hydrological sensitive area and the ecological sensitive area to construct a habitat evaluation model, determining a typical fish key habitat, and constructing a reservoir ecological flow configuration model; determining a target spawning site; s2, integrating the two-dimensional hydrodynamic model and the fish habitat model, calculating habitat hydraulic power demands and flow pulse demands of different fishes in the spawning period, constructing an ecological water demand process in the spawning period, and calculating basic hydrological demands of ecological base flow for supplementing a non-spawning period; and S3, carrying out ecological water demand coupling on a plurality of spawning sites with overlapped spawning periods, and determining a reservoir ecological flow collaborative configuration scheme. According to the method, on the basis of the particularity of multi-section water transfer disturbance and multi-target collaborative protection of a water source area of western-line engineering, the ecological water demand of typical fishes is researched, and a reservoir ecological flow configuration scheme is determined.

The application discloses a reservoir ecological flow allocation method based on multi-section water diversion and multi-target fish collaborative protection, which comprises the following steps: S1, determining a hydrological sensitive area and an ecological sensitive area based on water diversion influence constraints and fish resource distribution data, superimposing the hydrological sensitive area and the ecological sensitive area to construct a habitat evaluation model, determining a key habitat of a typical fish, and further determining a target spawning ground; S2, integrating a two-dimensional hydrodynamic model and a fish habitat model, calculating habitat hydraulic requirements and flow pulse requirements of different fishes in a spawning period, constructing an ecological water demand process in the spawning period, and simultaneously calculating an ecological base flow to supplement basic hydrological requirements in a non-spawning period; and S3, coupling ecological water demand for multiple spawning grounds overlapping in the spawning period, and determining a reservoir ecological flow collaborative allocation scheme. The method is based on the particularity of multi-section water diversion disturbance and multi-target collaborative protection of the west line project water source area, studies ecological water demand of typical fishes, and determines a reservoir ecological flow allocation scheme.

The invention provides a fish habitat suitability evaluation method. The fish habitat suitability evaluation method comprises the following steps: acquiring a hydrodynamic index and a water environment index of a river to be detected; substituting the hydrodynamic index and the water environment index of the river to be detected into the suitability function of the target fish to obtain a comprehensive habitat suitability; and calculating corresponding weighted available areas under different flow conditions based on the comprehensive habitat suitability, and selecting a suitable ecological flow in combination with a Tennant method and a guarantee target. According to the method, the hydrodynamic indexes and the water environment indexes are obtained, the hydrodynamic indexes and the water environment indexes are combined with the target fish suitability degree function, the fish habitat suitability degree is comprehensively and accurately reflected, fish individual differences are fully considered, and evaluation one-sidedness is avoided. The weighted available area under different flows is calculated based on the comprehensive habitat suitability, and then the Tennant method and the guarantee target are fused, so that the ecological flow determination is more reliable and reasonable.

The present invention provides a method and system for rapid evaluation of fish habitat suitability based on deep learning, which relates to the field of river ecological technology, including: using a physical mechanism model of fish habitat suitability to simulate and obtain the evaluation results of the physical mechanism model of river fish habitat suitability corresponding to each flow condition, and thereby establish a fish habitat suitability training sample set; using the sample set to train a deep learning model for predicting river fish habitat suitability; identifying flow-sensitive intervals and establishing a fish habitat suitability incremental learning training sample set, and performing incremental learning training on the deep learning model. The present invention establishes a mapping relationship between the distribution of fish habitat suitability in the river and factors such as flow rate through autonomous learning in the data samples simulated by the physical mechanism model, thereby achieving a rapid and accurate evaluation of the distribution of fish habitat suitability in the river. The present invention reduces the time and cost investment of traditional prediction technologies, and has significant practicality and broad application prospects.

The invention relates to the technical field of marine ecological informatics, and discloses a habitat suitability prediction method and system for marine ecological management.The habitat suitability prediction method for marine ecological management.The habitat suitability prediction method for marine ecological management.The habitat suitability prediction method for marine ecological managementincludes the steps that traditional knowledge data of fishermen is obtained, and audio data is transcribed into a text format through a natural language processing technology; generating a traditional knowledge graph containing the corresponding relationship between the observation characteristics and the fishing results; carrying out canonical correlation analysis on surface observation characteristics and vortex physical parameters in the traditional knowledge graph, and converting traditional knowledge into quantitative expression of a vortex parameter space based on a mapping matrix; and adopting a random forest to integrate multi-source prediction results, taking a traditional knowledge prediction rule and a physical model calculation result as input features, and outputting a middle-layer fish habitat probability distribution diagram. The technical problem that traditional knowledge and a vortex physical model are difficult to effectively integrate for middle-layer fish habitat prediction is solved.

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.

The invention discloses a fish habitat ecological monitoring device, and relates to the technical field of fishery resources, a storage battery is fixed at the top end of a fixed supporting frame, a transmission motor is mounted on one side of the top end of the fixed supporting frame through a motor base, and a supporting rotating frame is clamped to the position, corresponding to the fixed supporting frame, of an output shaft of the transmission motor; supporting cables are symmetrically wound around the side ends of the supporting rotating frame, a bearing fixing plate is welded to the bottom ends of the two supporting cables, a collecting fixing pipe is welded to the bottom end of the bearing fixing plate, one end of the collecting fixing pipe is sleeved with a storage intercepting cylinder, a subdivision net plate is fixed to the inner side of the storage intercepting cylinder, and a swing motor drives a swing plate to change the position of the camera. The environment is observed by utilizing the camera, so that the environment can be comprehensively detected by utilizing multiple groups of monitoring equipment in the detection process, and a worker can conveniently and accurately know the environment and conveniently analyze the influence of various data in the ecological environment on fishes according to detection data.

The invention discloses a fish habitat real-time monitoring system based on Internet of Things. Comprising a data acquisition module used for acquiring fish habitat data, a communication networking module used for transmitting the acquired data, an analysis early warning module used for analyzing the data, a comprehensive management module used for assisting device operation and a propaganda education module used for propagandizing habitat education. Water quality parameters, hydrological parameters, fish activity data and human activity data of a fish habitat are collected, analysis data are generated in an analysis and early warning module, an ecological health index of the fish habitat is calculated, an early warning signal is generated, ecological risks of a fish living environment are predicted, and an ecological health index thermodynamic diagram is generated in a comprehensive management module. And real-time monitoring is completed under cooperation of multiple modules. The fish ecological resource environment is subjected to multi-source collection and analysis through the multi-source sensing technology, the correlation between fish habitat data and fish population distribution is deeply excavated, information of the habitat is accurately grasped, the monitoring accuracy is high, and the risk pre-judgment capability is high.

The invention relates to the technical field of channel development habitat protection and river environment reconstruction, in particular to a method for creating a sound scenic area suitable for a fish habitat by using underwater rockfill, which comprises the following steps: collecting river flow velocity, water depth and river curvature parameters through hydrographic measurement equipment; the method comprises the following steps: acquiring frequency spectrum and sound pressure level parameters of underwater radiation noise of a ship by using underwater acoustic measurement equipment, determining a water area meeting fish inhabitation and sound shielding requirements according to the parameters, and constructing a layered rockfill structure based on a natural river form. According to the structure, the microtopography and the continuous sound shadow area are arranged, the water flow condition is improved, interference of underwater radiation noise on fishes is effectively reduced, and therefore the fish habitat environment is recovered and stabilized.

This invention discloses a method for evaluating the suitability of fish habitats, belonging to the technical field of fish habitat suitability evaluation. The method includes: determining a target area; collecting conditional data of the target area to obtain regional conditional data; splitting and merging the target area according to the regional conditional data to obtain various evaluation areas; collecting regional evaluation analysis data based on the evaluation area information; analyzing the regional evaluation analysis data to obtain supplementary collection items and suitability values ​​corresponding to each evaluation area; generating corresponding evaluation curves based on the supplementary collection items and suitability values; collecting data from the target area according to the supplementary collection items to obtain supplementary collection data; inputting the supplementary collection data into the evaluation curve for matching to obtain a representative suitability value; classifying each evaluation area into equivalent areas to obtain equivalent areas; setting suitability correction values ​​corresponding to each equivalent area; and setting evaluation vectors based on the suitability correction values ​​corresponding to each equivalent area.

The invention provides a fish habitat monitoring method, device and equipment, a storage medium and a product, and relates to the technical field of fish habitat assessment. The method comprises the steps of determining a to-be-monitored target area according to habitat information of a to-be-monitored target fish, generating a target navigation route of the aerial robot, controlling the aerial robot to fly along the target navigation route, collecting multiple pieces of image data shot in the flight process, and splicing the multiple pieces of image data to obtain a spliced image; the method comprises the steps of obtaining an ortho-image map, performing image preprocessing, performing feature recognition on the preprocessed ortho-image map by using a convolutional neural network algorithm to obtain a feature region, and performing discrimination calculation on the feature region according to a calculation index corresponding to a to-be-monitored target fish so as to obtain an evaluation result of the ecological health condition of the target region. According to the method, the fish habitat monitoring efficiency is improved.

The invention relates to the technical field of water conservancy projects, and discloses a construction method of a river fish habitat model, comprising the following steps: S1, preparing files of river terrain, upstream incoming flow and downstream water level; s2, determining the flow velocity and the water depth suitability index of the target fish; s3, constructing a hydrodynamic model; s4, outputting the water depth, the flow velocity and the coordinates of each unit according to a grid unit dry-wet judgment criterion; s5, based on the suitability index, the water depth and the flow velocity, calculating the weighted available area of the habitat and the distribution of the comprehensive suitability index of the water depth and the flow velocity; s6, performing habitat quality grading on the grid units; s7, calculating a Simpson index L according to the water depth and the flow velocity of each unit, and evaluating the diversity of the waterpower habitat of the river channel; and S8, outputting various distribution diagrams and a fish habitat calculation table. The method can accurately quantify the influence of factors such as water depth and flow velocity on the fish habitat, synchronously evaluate the habitat quality and habitat diversity, and provide an effective method for dominant fish habitat simulation and protection.

The invention discloses a fish habitat ecological monitoring device and a monitoring method thereof.The device comprises a shell, a sensor cluster, a sealing assembly and a power generation assembly, the sensor cluster is arranged on the shell, a fish inlet is formed in one end of the shell, a bottom cylinder, a detection assembly and the sealing assembly are arranged in the shell, and the power generation assembly is connected with the shell; the sensor cluster and the detection assembly are electrically connected with the power generation assembly. The detection assembly can detect roes laid by female individuals in a target fish school, continuously shoot the fishes in the spawning period to store sufficient data for analyzing the overall condition of the fish school, and can also analyze the state of the roes laid by the fishes to assist in judging the population state. Fish spawns under the protection of the shell, and the spawns are stored in the collecting tank and can be conveniently taken out for research subsequently.

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.

The present invention provides a method for accurately locating the spawning grounds of schizothoracine fish, comprising: step 1, determining the study area; step 2, determining the sexual maturity stage based on the egg diameter and the stage of gonad development, and then determining whether spawning has occurred based on whether the eggs are emptied and whether the parent fish's anal fin is broken, thereby determining the spawning time; step 3, based on the study area determined in step 1, identifying the river section of the spawning ground of the genus Gymnosoma schizothoracine fish during the spawning period of the genus Gymnosoma schizothoracine fish determined in step 2; step 4, based on the spawning ground section determined in step 3, accurately locating the spawning ground: determining the specific time of spawning within the spawning period obtained in step 2; after determining the specific spawning time, accurately locating the spawning ground of the genus Gymnosoma schizothoracine fish based on the bottom soil differences of the river section of the spawning ground of the genus Gymnosoma schizothoracine fish. The present invention accurately locates the spawning grounds of schizothoracine fish, fills a gap, and provides scientific support for the protection of fish habitats in the source river of the Yangtze River.

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 reservoir ecological scheduling sequential decision-making method based on positive extrinsic performance, and aims to optimize a reservoir scheduling strategy so as to improve an ecological protection effect on a downstream river in a dry season. The method comprises the following steps: firstly, calculating a positive extrinsic index (PEI), and quantifying improvement benefits of reservoir scheduling on flow and a fish habitat environment; and then establishing a remaining period ecological benefit function, comprehensively considering the ecological benefits of the current time period and the future time period, and carrying out recursive optimization by adopting a dynamic planning or approximate dynamic planning algorithm. State variables such as reservoir capacity, runoff and time periods are discretized, an optimal scheduling strategy of each time period is generated through recursion calculation, and termination of the recursion process is judged by setting convergence conditions. The method not only can meet the water supply, power generation and irrigation requirements of the reservoir, but also can effectively improve the health level of a river ecosystem.

The invention discloses a method for protective monitoring of fish habitats in water areas based on multi-source satellite remote sensing images, comprising: comprehensively acquiring SAR and visible light satellite remote sensing images of multiple temporal and spatial scales and preprocessing images of different modalities respectively; then extracting the water area range based on the normalized difference water index (NDWI) of the visible light image and the polarized water index (SDWI) of the SAR image, and calculating the chlorophyll concentration parameter (YChla) and the suspended solids concentration parameter (YTSS) to evaluate the water quality; monitoring abnormal fishing and sand mining dynamics based on the YoloV3 target recognition model and combining the characteristics of vessels with abnormal behavior; extracting the changes in the water area and the surrounding areas of the fish habitat in different periods by using satellite remote sensing images, timely discovering engineering construction activities and lake reclamation behaviors, judging the impact on the fish habitat, and then guiding relevant personnel to deal with it.

The present invention relates to the technical field of marine aquaculture equipment, and discloses a cage structure and installation method thereof that can increase fish habitat friendliness. The cage structure includes jacket legs, breakwater net legs, an inner aquaculture net, an outer breakwater net, and an anchoring foundation. The jacket legs and breakwater net legs are paired and anchored to the seabed via an anchoring foundation, with multiple pairs of jacket legs and breakwater net legs forming a polygon at the anchoring points on the seabed. The inner aquaculture net is tied to the jacket legs to form an inner polygonal column, and the outer breakwater net is tied to the breakwater net legs to form an outer polygonal column. The inner aquaculture net and the outer breakwater net are divided into a pressure relief zone, a transition zone, and a habitat zone at the same height interval to improve fish habitat friendliness. Through mechanical analysis and aquaculture research, the present invention, based on the nonlinear distribution of ocean current energy along water depth, vertically divides the net into multiple functional zones to accommodate fish swimming in the upper layer and inhabiting the lower layer.

The invention discloses a fish habitat restoration system, and relates to the technical field of ecological floating island restoration. Comprising a restoration traction piece, a root system amplification piece is installed on the restoration traction piece, and the root system amplification piece is used for amplifying ecological plant root systems; a positioning piece is mounted on the repair traction piece; the positioning piece is used for positioning the root system amplification piece; an anti-gnawing part is mounted on the repairing traction part; an anti-dragging part is mounted on the anti-gnawing part; the root amplification part is matched with the repair traction part to facilitate root amplification through the amplification holes, the diameter of the amplification holes is larger, the rooting resistance can be reduced, and the coconut fiber matrix can be prevented from leaking during the initial growth of the plant in cooperation with the positioning control of the positioning part; the problems that an existing fish habitat repairing system is inconvenient to automatically control and increase plant root system amplification and is also inconvenient to prevent plant root systems from being pulled are solved.

The application discloses a kind of based on GIS spatial weighting synthesis model's watershed fish habitat habitat quality quantitative evaluation method, it is related to watershed ecological environment evaluation, GIS spatial data analysis, ecological quality monitoring technical field, including the following steps: S1, watershed multi-source ecological data acquisition and pretreatment, collect the natural background data and human activity data of target watershed;S2, construct natural-human activity dual factor evaluation index system;S3, construct GIS spatial weighting comprehensive evaluation model;S4, watershed habitat quality macro quantitative calculation;S5, high intensity habitat interference area accurate identification;S6, global habitat evolution law mining, the application first realizes natural background inherent factor and human activity disturbance factor depth coupling, gives consideration to natural ecological evolution law and human development influence, completely solve the problem of traditional evaluation factor single, result is one-sided, and evaluation result is more close to watershed real ecological present situation.

A scheduling method for a daily ecological flow variation of a river reach based on an overlap rate of suitable habitats for fish, includes: drawing a baseline flow-scheduled flow increment-fish habitat suitability overlap rate distribution map; and acquiring a daily mean flow of a current day to serve as a baseline flow, searching the baseline flow-scheduled flow increment-fish habitat suitability overlap rate distribution map to obtain a range of scheduled flow increments with an overlap rate of suitable habitats for fish greater than a preset value, and in combination with the baseline flow and the range of the scheduled flow increments, obtaining a flow scheduling range for a next day. The present disclosure quantitatively evaluates the overlap rate of the suitable spawning region of the fish in different flow variations under different baseline flows, thereby obtaining a constraint value for the ecological flow variation of the river reach.

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 relates to the field of river water ecological restoration, in particular to a structure simulating a natural fishway and a fish habitat, which comprises a riverbed and a block stone string, and the block stone string is formed by connecting a plurality of block stones in series in sequence through a connecting rope; a plurality of fixing piles are sequentially arranged on the two sides of the riverbed at intervals in the water flow direction; a plurality of block stone strings are directly laid on the riverbed, and the two ends of the block stone strings are bound on the fixing piles; or a plurality of block stone strings are arranged in a staggered manner to form a net-shaped structure body, and then the net-shaped structure body is laid on the riverbed, and the parts, close to the shoreside, of the two sides of the net-shaped structure body are bound on the fixing piles. The structure can avoid the problem of loss of block stones under the scouring influence of water flow, and has the characteristics of easiness in transportation, simplicity in construction, low price, high stability and low operation and maintenance cost.

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.