111 results about "Environment water" patented technology

The invention relates to the technical field of water conservancy control, and discloses a water conservancy gate cooperative control method and system, and the method comprises the steps: fusing the real-time operation parameters and environmental hydrological parameters of a water conservancy gate, and obtaining a dynamic feature data set; identifying the interaction relationship between the water level and the flow velocity parameter, and constructing a hydraulic association network; determining a leading gate and an auxiliary gate based on the network edge weight, and generating an initial control instruction sequence; a control effect data set is formed by monitoring actual data and an operation state of opening degree adjustment; analyzing a control deviation between the control effect data set and an expected control target to correct an action time sequence and an opening parameter in the gate coordination rule to obtain an optimal control strategy; a gate cooperation rule in the optimization control strategy is fed back to the construction process of the hydraulic association network, and the judgment standards of the main gate and the auxiliary gate are updated; the cooperative control efficiency of the water conservancy gate can be improved.

The invention discloses a confocal laser microscope detection method for micro-plastic surface biofilm components and biomass, and belongs to the field of micro-plastic pollution monitoring. The method comprises the following steps: carrying out stratified sampling and polymer component identification on micro-plastic in an environmental water body; the method comprises the following steps: marking algae, blue-green algae, bacteria and extracellular polymeric substances in a biological membrane through specific fluorescent staining, carrying out high-resolution three-dimensional imaging by utilizing a confocal laser microscope, and realizing batch quantitative analysis of each component of the biological membrane by adopting ImageJ software. The technical problems that an existing detection method is insufficient in parameter dimension, evaluation result deviation is caused only based on partial component quantification, and the influence of the overall structure of the biological membrane on the micro-plastic migration behavior cannot be truly reflected are solved. According to the method, the biomass and spatial distribution of each component of the biological membrane can be comprehensively and accurately quantified, the accuracy of analyzing the vertical migration mechanism of the micro-plastic is improved, and multi-dimensional data support is provided for ecological risk assessment.

The utility model relates to an enhanced denitrification device for a microbial electrolysis constructed wetland. The enhanced denitrification device comprises a constructed wetland system, an electrolysis system and an intelligent control system, the constructed wetland system comprises a water distribution area and a constructed wetland reaction area; a water inlet device is arranged in the water distribution area, and the water distribution area is communicated with the constructed wetland reaction area through the water inlet device; wherein an electrolysis system and an intelligent control system are also arranged in the constructed wetland reaction zone. The device has the advantages that the removal of pollutants, mainly nitrogen, of the constructed wetland is enhanced by mainly utilizing external voltage in the electrolysis system 2, and the water inlet flow, the external voltage and the distance between the electrodes can be adjusted according to the intelligent control system 3, so that the surface hydraulic load of the constructed wetland and the current intensity in the wetland are controlled; and the two systems cooperate to enhance the removal of pollutants, especially nitrogen, of the constructed wetland, so that the pollutants in water are efficiently removed, the water quality of discharged wastewater is improved, and the environmental water quality is improved.

The application discloses a complex environment water level monitoring system and method based on heterogeneous light field cooperation, which is characterized in that: a water gauge image is segmented from a water gauge point cloud and a joint external parameter; the water gauge image is further segmented after image enhancement, and the tilted water gauge is corrected; the intensity of the water gauge point cloud is accumulated, and the water level line is obtained through the maximum gradient method; the corrected water gauge image is detected by using a target detection algorithm to detect digital characters, the character recognition algorithm is used to perform OCR recognition on the detected digital characters, and the water level value is calculated according to the digital characters, the water level line and the water gauge image. Through the combination of laser radar and visible light field, the reflection characteristics of different materials are utilized, so that the water level in the complex environment of a river channel, a reservoir and a coast can be monitored in real time. The interference of floating objects and weather factors on water level detection is effectively avoided, and the accuracy and robustness of water level monitoring are significantly improved.

This invention belongs to the field of analytical detection technology and relates to a method for detecting estradiol using a combination of organometallic framework enrichment and enzyme-linked immunosorbent assay (ELISA). A magnetic organometallic framework solid-phase extractant is used to enrich estradiol in the sample, followed by detection of the enriched estradiol using ELISA. The magnetic organometallic framework solid-phase extractant is prepared by subjecting mercaptoacetic acid-modified Fe3O4 particles, zirconium salt, and 2-amino-terephthalic acid to a solvothermal reaction at 110–130°C for 22–26 hours. The detection method provided by this invention has advantages such as short detection time, high sensitivity, good specificity, and high accuracy, thereby enabling the detection of trace amounts of estradiol in environmental water samples.

The invention belongs to the technical field of toxicity tests, and discloses a method for evaluating zebra fish developmental toxicity by single or combined use of fluopyram and tebuconazole. The method is simple, efficient and accurate, through a combined toxicity test and a single pesticide test, reference data is conveniently increased according to the influence of different environments and different medicaments on animals, the influence of pesticides on zebra fish development is calculated according to the death rate and the median lethal concentration of zebra fish embryos, the data is reasonably analyzed and processed, and the method is suitable for popularization and application. The problems that related evaluation standards formulated by depending on a single effect are not accurate and cannot truly reflect the change of the real environment quality are avoided, the environmental risk of effectively evaluating the pollutants in the environmental water body is improved, and an environmental threshold value safer for aquatic organisms is formulated conveniently.

The invention belongs to the technical field of environmental hydraulics, and relates to a carbon transportation characteristic research method and device under reservoir dispatching operation and computer equipment, and the method comprises the steps: constructing a reservoir three-dimensional carbon transportation monitoring network, and obtaining the basic data of a carbon transportation process; based on the basic data, constructing a hydrodynamic force-water quality coupling model for simulating the carbon transportation process, and verifying the hydrodynamic force-water quality coupling model by using monitoring data; quantifying scheduling operation characteristics, and extracting scheduling characteristic parameters influencing carbon transportation; establishing a carbon flux accounting model considering the scheduling influence, and quantifying the influence of scheduling on carbon income and expenditure; establishing a quantitative relationship between the carbon transport characteristic parameters and the scheduling characteristic parameters; and scheduling optimization evaluation is carried out based on carbon environment constraints, a carbon target is incorporated into a scheduling optimization system, and a low-carbon scheduling scheme is proposed. The method has systematicness and dynamics, realizes quantitative evaluation of carbon transportation, and has practicability; the method can be popularized to other types of water body carbon cycle research, and has expansibility.

This invention belongs to the field of microbial technology and discloses the application of *Lactobacillus plantarum* P101 in the adsorption and removal of nanoplastics in environmental water. The *Lactobacillus plantarum* P101 strain is deposited at the China Center for Type Culture Collection (CCTCC), accession number CCTCC NO: M 2021108, deposit date January 19, 2021. This strain exhibits an adsorption rate of ≥85% for nanoplastics with a particle size of 100-1000 nm. The strain was isolated from fermented sauerkraut. The *Lactobacillus plantarum* P101 provided by this invention demonstrates significant adsorption capacity for nanoplastics in both live and inactivated states, which is of great significance for the environmental remediation of nanoplastics.

The invention discloses an intelligent research and judgment system for power grid environment water conservation compliance based on multiple modes and a knowledge graph, and the system comprises an environment water conservation law and regulation knowledge graph construction module which converts an unstructured environment water conservation law and regulation text into a structured knowledge graph; a multi-source space-time alignment and data fusion module; a multispectral semantic understanding and violation feature extraction module; the knowledge graph driven compliance reasoning and studying and judging module is used for carrying out compliance reasoning and studying and judging on the violation characteristic facts based on the knowledge graph and outputting violation events and risk indexes; and an interpretable rectification report generation and dynamic early warning module. According to the method, based on further analysis and research on existing technical problems, unstructured regulation provisions are converted into structured constraint rules and entity relationships by constructing a computable and reasonable environment-water protection regulation knowledge graph, so that a machine can directly understand and apply the regulation, the efficiency and accuracy of regulation retrieval, association and application are improved, and the working efficiency is improved. And the manual dependence is reduced.

The application provides a kind of marine environment underwater robot path planning method and system, comprising: based on ROS Melodic, Gazebo11 and UUV Simulator, high-fidelity marine environment simulation platform is constructed, global path planning module uses improved algorithm in the high-fidelity marine environment simulation platform searches the feasible path of underwater robot from starting point to target terminal, obtains global reference path, with global reference path as guide, local path planning module obtains local optimal path through multi-stage processing flow, in global-local collaborative framework, through hierarchical intelligent cooperation mechanism, global optimal path is obtained. By constructing high-fidelity environment simulation platform, integrating spatial sampling path planning algorithm, establishing multidimensional verification system, realizing the accurate evaluation of algorithm performance, getting rid of the dependence of path planning on physical experiment, shortening the development cycle.

A kind of bird behavior and water quality coupling driven machine learning adaptive feeding device and its use method.The present application relates to ecological environment engineering technical technical field, disclose a kind of bird behavior and water quality coupling driven machine learning adaptive feeding device including adaptive feeding system decision module and feeding device module;The adaptive feeding system decision module is composed of AI camera, polysilicon solar panel, wireless communication module, battery, data processor and water quality sensor, the AI camera, polysilicon solar panel, wireless communication module, battery, data processor and water quality sensor are all installed on stainless steel support, the AI camera is located at the top of stainless steel support.The present application is automatically monitored by double-layer machine learning architecture, bird population density, behavior characteristics and environmental water quality, dynamically optimizes feeding strategy, realizes the self-adapting control of feeding amount, avoids the water pollution and food waste caused by excessive feeding, and reduces the endogenous release pollution caused by bird fight and food fight.

The application provides a method for detecting PFAS based on a three-dimensional Ag / NiFe-LDHs surface enhanced Raman scattering substrate and ion pair extraction, and belongs to the technical field of PFAS detection, and comprises the following steps: first, a three-dimensional Ag / NiFe-LDHs SERS substrate is prepared; then, ion pair extraction-dissociation treatment is performed on a water sample to be measured to obtain a detection solution; finally, the substrate is immersed in the detection solution for adsorption, a spectrum is collected by using a Raman spectrometer, and semi-quantitative detection of PFAS in the water sample is realized according to the linear relationship between the characteristic peak intensity and the logarithm of the molar concentration of PFAS. The application realizes the synergistic application of the three-dimensional Ag / NiFe-LDHs SERS substrate and the ion pair extraction technology and the indirect detection of PFAS, improves the detection difficulty of weak PFAS Raman signals and difficult enrichment, improves the detection sensitivity and adaptability of PFAS in the water sample, and lays an application foundation for rapid monitoring of PFAS pollution in environmental water.

This application discloses a composite fiber membrane and its preparation method, relating to the field of composite material technology. The preparation method includes: in-situ modification of a composite fiber membrane precursor with stearic acid to obtain the composite fiber membrane; the composite fiber membrane precursor is a polypropylene carbonate fiber membrane loaded with zinc oxide nanostructures. The composite fiber membrane proposed in this application, through in-situ modification of the polypropylene carbonate fiber membrane loaded with zinc oxide nanostructures using stearic acid, imparts hydrophobic properties to the composite fiber membrane. This prevents the rapid erosion of the zinc oxide nanostructures by environmental water molecules in humid environments, avoiding the problem of explosive release and rapid depletion of zinc ions in a short time, ultimately leading to antibacterial failure.

The present application relates to the technical field of the submersible shock absorbing thrust bearing, and particularly relates to a seawater pressure compensation device for a shock absorbing thrust bearing. The seawater pressure compensation device structure can flexibly conduct the external environment water pressure of the submersible to the internal hydraulic system and realize the static water thrust balance of the shock absorbing thrust bearing, which is of great significance to realize the full-depth effective shock absorption of the shock absorbing thrust bearing. The seawater pressure compensation device is provided with displacement monitoring and alarm functions, which can timely and effectively remind the operator to avoid the loss of the compensation device function caused by pipeline corrosion and leakage in the external environment water pressure transmission process. The present application has the self-closing function under the extreme condition of pipeline damage, which can avoid the use safety hazard of the submersible caused by a large amount of water in the extreme condition.

This invention discloses a nanozyme for the detection of phenolic compounds and a quantitative detection method for phenolic compounds. The nanozyme comprises an organometallic framework material and copper loaded on the surface of the organometallic framework material, possessing a core-shell structure. The active metal catalytic center is loaded on the material surface, which helps to improve the utilization efficiency and catalytic activity of the active center, thereby enhancing the detection capability of large molecular weight phenolic compounds. Based on the standard addition method, the nanozyme of this invention can be used for the quantitative analysis of BPA in environmental water and thermal paper, exhibiting high accuracy and sensitivity, and strong anti-interference ability. The quantitative detection method of this invention can be used in conjunction with an image acquisition device for quantitative calculation of phenolic compounds, further simplifying the detection of phenolic compounds.

The invention discloses an environmental water quality monitoring and predicting method based on deep learning, and relates to the technical field of environmental monitoring. The method comprises the steps of collecting multi-site time series data and constructing a space-time input matrix and a space relation matrix; a time sequence feature is extracted by using 1D convolution and an improved Mama network; spatial features are extracted through multi-head local attention with distance punishment; carrying out multi-index multi-step prediction by adopting a multi-task learning framework after fusion; a multi-objective loss function is constructed, and a GRPO optimization strategy is adopted for training; during reasoning, uncertainty estimation is carried out through Monte Carlo Dropout, and a prediction mean value, a confidence interval and a risk level are output. According to the method, deep space-time joint modeling and multi-index collaborative prediction can be realized, the prediction precision and the training stability are improved, credible early warning information can be provided, and the method can be widely applied to water quality prediction of various environmental water bodies such as rivers, lakes and reservoirs.

The present application belongs to the technical field of environmental hydraulics, and relates to a reservoir operation scheduling carbon transport characteristic research method, device and computer equipment. The method comprises the following steps: constructing a three-dimensional reservoir carbon transport monitoring network to obtain basic data of the carbon transport process; based on the basic data, a water dynamics-water quality coupling model for simulating the carbon transport process is constructed, and the water dynamics-water quality coupling model is verified by using monitoring data; the operation scheduling characteristics are quantified, and scheduling characteristic parameters affecting the carbon transport are extracted; a carbon flux accounting model considering the influence of scheduling is established to quantify the influence of scheduling on carbon budget; a quantitative relationship between the carbon transport characteristic parameters and the scheduling characteristic parameters is established; based on carbon environmental constraints, scheduling optimization evaluation is carried out, the carbon target is included in the scheduling optimization system, and a low-carbon scheduling scheme is proposed. The present application has systematicness and dynamicity, realizes quantitative evaluation of carbon transport, has practicability, can be popularized to carbon cycle research of other types of water bodies, and has expansibility.

The utility model discloses water environment water quality treatment equipment which comprises a vertically-through first tank body, a second tank body connected and mounted below the first tank body, baffle rings fixed on the upper side and the lower side in the first tank body, a barrel body erected between the baffle rings, a filter plate arranged above the barrel body, and a water outlet arranged below the filter plate, a plurality of primary filtering parts capable of filtering solid impurities in water are fixed in the barrel body at intervals, scraping parts capable of scraping the solid impurities on the primary filtering parts are arranged on the left side and the right side of the first tank body, a water filtering part is arranged in the second tank body, and rotating mechanisms capable of driving the scraping parts to rotate are symmetrically arranged below the first tank body. Compared with the prior art, solid impurities in a water body can be separated out without a large margin, and the water quality of the water body is improved.

This invention relates to the field of environmental water conservancy and ecological restoration technology, and discloses a method for evaluating the effectiveness of river restoration based on multi-source data. The method includes: collecting target and measure-type indicator data; preprocessing the data; dividing the indicators into time-series and non-time-series types; applying exponential time decay weighting to the time-series indicators to generate time-series characteristic weighted indicators; performing robust standardization of the median absolute deviation with the non-time-series indicators to generate a standardized indicator dataset; calculating the proportion and information entropy of each standardized indicator within each sample to construct the total information entropy; calculating the residual average sum using the equally weighted average as the measured effectiveness value and the initial weighted average as the simulated effectiveness value; constructing a joint loss function; solving for the function with the goal of minimizing the joint loss function to generate the optimal weights for each standardized indicator; and finally calculating a comprehensive restoration effectiveness index to quantitatively evaluate the river restoration effect. This invention enables quantifiable and comparable evaluation of restoration effects in different watersheds and at different times.

The invention provides a method for detecting the content of urea in a water sample by using high performance liquid chromatography. The method comprises the following steps: preparing a urea standard solution; performing filter membrane filtration pretreatment on the to-be-detected water sample; carrying out high performance liquid chromatography analysis according to optimized chromatographic conditions, and calculating the urea content by adopting a standard curve method; wherein the chromatographic conditions are as follows: a C18 type reversed-phase chromatographic column is adopted, a mixed solution of acetonitrile and ultrapure water is adopted as a mobile phase, isocratic elution is performed, and the detection wavelength is 190-200nm. According to the method, the mobile phase and the chromatographic column are improved, the urea content in the water sample is directly and accurately detected, operation is easy and convenient, the detection time is short, good specificity and stability are achieved, the detection limit is lower than 0.6 microgram / L, the recovery rate ranges from 95% to 105%, the relative standard deviation is smaller than 2%, and the method can be effectively applied to detection and analysis of the urea content in various environment water samples.

The invention discloses a tetracycline electrochemical sensor based on a nanocomposite and a detection method, and belongs to the technical field of environmental analysis and detection.The sensor comprises a nano-silver modified ITO electrode, a reference electrode and a counter electrode, and the nano-silver modified ITO electrode constructs a three-dimensional porous nano-silver layer on the ITO surface through a constant electric deposition method. The sensor has the advantages of high sensitivity, good selectivity and low cost, and can be used for rapid detection of tetracycline antibiotics in environmental water and food.

The utility model discloses a water environment monitoring buoy, which relates to the technical field of monitoring buoys and comprises a platform, a top box is arranged at the top end of the platform, an energy storage system is mounted in the top box, a water delivery pipe penetrates through the middle of the inner side of the top box, and a plurality of sensors are arranged at the top of the water delivery pipe. A photovoltaic panel is installed on the outer wall of the platform, a floating plate is fixedly connected to the bottom end of the platform, a water suction pipe and a water outlet pipe penetrate through the two sides of the bottom end of the floating plate respectively, a net cover cylinder is arranged outside the water suction pipe, and an outer gear ring is fixedly connected to the top end of the net cover cylinder. By arranging a series of structures, the probability that the sensor cannot be in contact with environmental water due to extrusion of the internal space of the buoy is reduced, errors of monitoring results are reduced, the accuracy of the monitoring results of the buoy is improved, and the probability that the sensor breaks down or is damaged due to adsorption of sundries is reduced. The service life of the sensor is effectively prolonged.

The application provides a sealing glue, a photovoltaic module and a packaging method thereof, and an electronic component. The sealing glue comprises 30-40 parts of butyl rubber, 10-30 parts of polyisobutylene, 10-35 parts of a desiccant, 1-15 parts of a filler, and 0.02-0.2 parts of a titanate coupling agent, wherein the general structure of the titanate coupling agent is (RO) m -Ti(OX-R'-Y) n , m is any one integer in 1-4, n is an integer, n=6-m, R is a C1-C 10 alkyl, X is selected from any one element in C, N, P and S, R' is a C8 alkyl or above, and Y is selected from any one of a hydroxyl, an amino and a double bond. The sealing glue is used for sealing an opening of the photovoltaic module, can effectively block the opening from being eroded by external environment water vapor, and can also solve the insufficient insulation and appearance defects caused by the bubbles at the opening during lamination.

The invention relates to the technical field of geological analysis, in particular to a paleo-water depth and hydrodynamic condition quantitative reconstruction method based on a marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure of marginal and microstructure. The system extracts structural parameters such as the thickness of the lamina, the shape fluctuation degree, the lateral extension continuity and the related microstructures of the microbial mat. And by inputting actual laminated stone structure parameters into the model, synchronous calculation and output of paleo-water depth values and hydrodynamic condition grades are realized. According to the method, a traditional paleo-water depth recovery method depending on a single substitute index is broken through, high-precision, repeatable and comparable quantitative reconstruction of the water depth and hydrodynamic conditions of the shallow sea sedimentary environment in the Shiwujian is achieved, and a reliable technical means is provided for research on early life activity environments and sedimentary dynamics.

The invention relates to the field of environmental water treatment, and discloses lanthanum-titanium modified autoclaved aerated concrete as well as a preparation method and application thereof. The preparation method comprises the following steps: adding autoclaved aerated concrete (CAAC) into a mixed solution of tetrabutyl titanate and ethanol; adding a mixed solution of glacial acetic acid, hydrochloric acid, water and ethanol, and stirring until gel is formed; drying and grinding the gel; adding into lanthanum nitrate, adjusting the pH value of the solution, stirring and standing; and washing the precipitate, drying, and calcining again to obtain the lanthanum-titanium modified autoclaved aerated concrete (La-Ti-CAAC). The specific surface area is 50.94 m < 2 > / g, and the aperture is 8.02 nm. The adsorption capacities of the La-Ti-CAAC on the fluoride and the phosphate respectively reach 20.99 mg / g and 24.26 mg / g. The adsorption effect is good under the condition that the pH value is 3-10, the selectivity is good, and the good adsorption capacity is still achieved after four times of circulation.

The invention relates to the technical field of water quality circulating filtration for ecological environment water treatment, and discloses a water quality circulating filtration device for ecological environment water treatment, which comprises a treatment box, the top of the treatment box is fixedly connected with a guide bracket, the upper surface of the treatment box is fixedly connected with a bracket, and the lower surface of the treatment box is fixedly connected with a bracket; a drainage pipe is fixedly connected to the inner wall of the treatment box, a valve is fixedly connected to the surface of the drainage pipe, a filtering device is arranged in the treatment box, and a collecting device is arranged in the treatment box. When water needing to be treated enters the treatment box and a motor is started, an output end drives a threaded rod to rotate through a first rotating rod, and the threaded rod rotates to drive a push-and-scraper to move front and back above a grating plate, so that the push-and-pull work is performed on sundries on the upper part of the grating plate, and the filtering efficiency of the machine is improved; and the scraping plate is pushed and pulled through the force application rod to drive the second scraping plate to move on the surface of the inner wall of the treatment box by extruding the inclined plate.

The invention discloses a method for extracting catechol in an environmental water sample by using a hydrophobic supramolecular deep-eutectic solvent, and belongs to the technical field of extraction separation, the hydrophobic supramolecular deep-eutectic solvent is prepared under a heating condition by using beta-cyclodextrin as a hydrogen bond donor and methyl trioctyl ammonium chloride as a hydrogen bond acceptor, and the hydrophobic supramolecular deep-eutectic solvent is used for extracting catechol in an environmental water sample. The material has excellent hydrophobic performance and supramolecular recognition capability, and can realize efficient extraction and enrichment of catechol in an environmental water sample; the extraction system constructed by the invention is simple and convenient to operate, rapid in separation and high in extraction efficiency, shows good enrichment performance and removal effect on catechol under optimized conditions, and provides a novel green and economic method with wide application prospects for efficient enrichment and removal of phenolic pollutants in environmental water.

The invention relates to the technical field of environmental pollutant detection, in particular to a method for detecting dichromate based on surface enhanced Raman spectroscopy, which comprises the following steps: preparing a noble metal nano material with the surface modified with a specific recognition ligand as an SERS probe, and enabling the ligand and dichromate ions to generate specific coordination or redox reaction; after a to-be-detected water sample and the SERS probe are mixed and incubated, a surface enhanced Raman spectrum is collected; and qualitative and quantitative detection of dichromate ions in a water sample to be detected is realized by analyzing the intensity change or peak displacement of a specific recognition ligand characteristic peak in a spectrum. According to the method, a signal modulation indirect detection strategy is adopted, a target object is represented by monitoring regular changes of reporter molecule signals, the problems that the affinity of dichromate ions and a substrate is weak and direct detection signals are not sensitive are solved, and the method has the advantages of being high in sensitivity, good in selectivity, high in anti-interference capacity, easy, convenient and rapid to operate and the like; the method is suitable for on-site rapid screening of trace hexavalent chromium in an environmental water body.

This invention relates to the field of water pollution detection technology and discloses a method for detecting the degree of stress on river aquatic ecosystems. The method includes: acquiring river drought indicators, environmental water quality indicators, and aquatic organism status indicators and constructing a synchronous monitoring sequence; calculating the cross-correlation between indicators and determining the characteristic lag step; correcting the temporal offset of the synchronous monitoring sequence based on the characteristic lag step and constructing a time-aligned feature data matrix; calculating the correlation components of each indicator relative to the evaluation standard and establishing a correlation model; identifying the variation nodes of aquatic ecosystem state variables and fitting the probability density function of the feedback evolution sequence to determine the evaluation threshold and confidence interval. This invention eliminates the logical bias caused by the sampling synchronicity assumption, making the assessment process conform to the hydrological and biochemical evolution law and improving the physical self-consistency of aquatic ecosystem stress identification.