27 results about "Estuary" patented technology

This invention provides a multimodal fusion-based method for correlation analysis of deep-sea environmental data outside the Yangtze River Estuary, belonging to the field of deep-sea environmental analysis technology. This invention achieves accurate data registration by establishing a spatiotemporal standardization model for multi-source data and employing an adaptive spatiotemporal kriging interpolation algorithm. It utilizes a sparse coding marine signal separation algorithm to construct an overcomplete dictionary to separate mixed signals and extract pure features. Based on an attention mechanism, a feature extraction network is constructed to automatically learn deep feature representations of physical, chemical, and biological parameters. A matrix rank deficiency detection algorithm is used to automatically supplement feature compensation vectors to ensure feature integrity. A cross-scale attention mechanism based on wavelet transform is constructed to fuse multi-scale features. A Shapley value interpretability evaluation system is established to quantify the importance of correlated features. This invention solves the technical problem of inaccurate correlated feature extraction during the fusion of multi-source heterogeneous marine environmental data.

The application discloses an underwater acoustic tomography flow measurement method based on phase difference. The method comprises the following steps: collecting bidirectional propagation acoustic signals of a water area to be measured, and extracting the propagation time and phase change of the bidirectional propagation acoustic signals; establishing the relationship among the phase change of the bidirectional propagation acoustic signals, the propagation time of the bidirectional propagation acoustic signals, the average flow velocity of the water area to be measured and the average sound velocity of the water area to be measured through wave acoustic, and inversely deriving the average flow velocity of the water area to be measured and the average sound velocity of the water area to be measured through the relationship. The purpose of the application is to provide an underwater acoustic tomography flow measurement method based on phase difference, which is more suitable for use in acoustic tomography technology with lower frequency. The uncertainty in flow velocity measurement can be reduced by simultaneously considering the time difference and the phase difference, and the automatic and high-precision flow measurement technology is promoted. The application is suitable for flow velocity measurement of water areas such as river channels, estuaries and bay areas.

The invention discloses a microplastic distribution prediction and tracing method, and relates to the field of model detection. Collecting multi-source monitoring data of a target water area, and performing space-time alignment processing on the multi-source monitoring data to generate a structured space-time data set; constructing a three-dimensional ocean current dynamic model of the target water area, simulating ocean current field distribution under different time-space conditions by using ocean environment auxiliary data, and extracting ocean current dynamic characteristic data; processing the spatio-temporal data set and the ocean current dynamic characteristic data through a micro-plastic prediction sub-model, and predicting and outputting a micro-plastic diffusion path and a micro-plastic concentration prediction value of each monitoring station; and processing the current micro-plastic distribution data and the ocean current dynamic characteristic data through the micro-plastic tracing sub-model, and predicting and outputting the current micro-plastic distribution backtracked estuary pollution source. According to the scheme, prediction of the micro-plastic diffusion path and tracing of the pollution source are achieved, the micro-plastic diffusion path can be accurately predicted, the pollution source can be accurately traced, and the efficiency and accuracy of marine micro-plastic pollution treatment are improved.

The application discloses a nitrogen and phosphorus synergic management method of river-estuary continuum, and belongs to the technical field of ecological management, and the method comprises the following steps: S1, using the coastal eutrophication potential index to diagnose the key nutrient elements affecting the stoichiometry of nutrient salts and flux; S2, determining the ecological threshold values of total nitrogen, total phosphorus, dissolved inorganic nitrogen and dissolved inorganic phosphorus in different zones of the estuary according to the relationship between the nutrient concentration and the ecological response index; S3, comprehensively diagnosing the eutrophication risk based on the coastal eutrophication potential index and the ecological threshold value, and judging whether to select the basin management or the estuary management; S4, identifying the key source area of nitrogen and phosphorus pollution which substantially limits the water quality target of the downstream under the water function zoning and the environmental capacity limitation; and S5, putting forward the nitrogen and phosphorus synergic management strategy based on the cost-benefit analysis; the application realizes the whole-chain nitrogen and phosphorus synergic management and control of land-sea overall planning, zoning refinement, accurate tracing, and economic efficiency, and is popularized and applied to the comprehensive treatment of eutrophication of river-estuary continuum.

The application discloses a kind of water diversion project water storage reservoir pollutant reduction amount prediction method and system, comprising the following steps: (1) collecting water source area of water diversion project, water storage reservoir and its main tributary water quality routine monitoring data and different river reach pollutant inflow, water storage reservoir shoreline data, reservoir inflow and outflow;(2) predict water quality condition of water storage reservoir, calculate water storage reservoir pollutant reduction amount;(3) calculate pollutant allowable concentration of main tributary estuary of water storage reservoir and inverse calculate pollutant allowable concentration of different river reaches, calculate the pollutant concentration of different river reaches, determine the land pollutant reduction amount of water storage reservoir and the land pollutant reduction amount of different river reaches of main tributary;(4) calculate water area pollutant reduction amount of water storage reservoir.The present application proposes water-land integrated pollutant reduction method, establishes water quality safety guarantee prediction system of water diversion project water storage reservoir, and provides systematic methodology for regional (basin) pollutant inflow reduction amount calculation.

The application discloses a method for predicting eel fry resource quantity, comprising the following steps: obtaining initial factors, screening the initial factors to obtain influence factors, obtaining historical data according to the influence factors, and constructing a generalized linear model and a nonlinear model; optimizing and verifying the generalized linear model and the nonlinear model through the historical data, obtaining current data according to the influence factors, predicting the current data through the verified generalized linear model and the nonlinear model, and combining the prediction results by weighting to generate an eel fry resource quantity prediction result. Through the technical scheme, the eel fry resource quantity in an estuary can be effectively and universally predicted.

This invention belongs to the field of environmental monitoring technology and discloses a remote sensing inversion method for dissolved inorganic nitrogen and silicate in estuaries based on salinity synergy. The method includes the following steps: S1. During a field survey in the land-sea interaction zone of the estuary, remote sensing reflectance, salinity, and nutrient data are collected simultaneously. The measured hyperspectral reflectance is simulated as the equivalent reflectance of the satellite band using the spectral response function of the target satellite, which is used to construct the training and validation datasets for the model. S2. A nonlinear inversion model of remote sensing reflectance and salinity is established, and a nutrient mixture model of salinity and nutrients is constructed. The training dataset is used for model training. S3. The satellite remote sensing reflectance data of the estuarine area to be predicted is input into the trained nonlinear inversion model and combined with the nutrient mixture model to generate the spatial distribution of DIN concentration and DSi concentration in the estuarine area. This method achieves high-precision remote sensing inversion prediction of DIN concentration and dissolved silicate DSi concentration in the estuarine area.

This invention relates to the field of marine acoustic detection technology and discloses a dynamic suppression algorithm for real-time elimination of the influence of tidal motion on sonar signals. The method collects sonar signal sequences and tidal motion parameter sequences for the current sea area and divides the sonar signal into multiple time windows. Within each window, the phase offset is calculated based on the tidal parameters and converted into time-domain compensation coefficients through an established dynamic coupling model, performing preliminary phase correction on the sonar signal. Spectral analysis is performed on the initially suppressed signal to extract residual interference features, and the parameter weights of the dynamic coupling model are adjusted accordingly to generate an optimized model. This optimized model is applied to the processing of the next time window, forming an iterative suppression closed-loop process. This method can adaptively track the dynamic changes of tidal motion, effectively weakening its periodic modulation interference on sonar signals and improving the accuracy of sonar detection data in strong tidal areas such as nearshore and estuaries.

The present application relates to the technical field of sediment cross-section erosion, and particularly relates to a method for predicting sediment cross-section erosion variation under the influence of a water gate. A current erosion and deposition topography sequence corresponding to a current time of a target gate is obtained, and future precipitation-runoff data, future water level difference between upstream and downstream, and future tide change data within a future preset time length corresponding to the target gate are obtained; based on the future precipitation-runoff data, the future water level difference between upstream and downstream, and the future tide change data, future gate scheduling data corresponding to the target gate is determined; the current erosion and deposition topography sequence, the future precipitation-runoff data, the future water level difference between upstream and downstream, the future tide change data, and the future gate scheduling data are input into a preset erosion and deposition variation prediction model, and output of sediment cross-section erosion variation within the future preset time length corresponding to the target gate is output. Timely and reliable technical support is provided for hydraulic scheduling and risk management, and safe and efficient operation of a tidal gate in an estuary is realized.

The invention relates to the technical field of hydrology and water resources, in particular to a salt tide upstream salinity forecasting model construction method and system. The method comprises the following steps: determining a salt tide monitoring section of a target estuary, and obtaining the real-time salinity of the salt tide monitoring section; when the real-time salinity exceeds a preset salinity threshold value and the continuous rising trend reaches a preset duration, judging the current time period as a high-salinity event; extracting daily average salinity, fresh water flow and tide level data of the associated hydrological monitoring station based on the high-salinity event to form high-salinity event data; and calculating the ratio of the salinity peak time difference and the salinity change amplitude of the salt tide monitoring section and the downstream tide level monitoring station. The method can accurately capture the typical propagation time-lag characteristic and the amplitude response characteristic of the salt tide upstream, overcomes the limitation based on an empirical threshold in the prior art, and remarkably improves the scientificity and the accuracy of salt tide upstream judgment.

The application discloses a Yellow River original ecology multifunctional system, which is characterized by the following steps: the Yellow River is divided into an upper and middle stream section from a source to Sanmenxia and a middle and lower stream section from Sanmenxia to an estuary; a plurality of main earth-water channels which are connected with the Yellow River and are built in depth on the two banks of the middle and lower stream section are built; the main earth-water channels are built by high-quality large square stones from the outer side of a dike road to a water inlet; a plurality of groups of water-resistant high-quality trees which are arranged in a triangular shape are planted in each main earth-water channel; a plurality of branch water channels which are connected with the main earth-water channels are built on each main earth-water channel; a gate and a small eye net are built at a water outlet of each main earth-water channel; and a plurality of silt separation pits are built on the two sides of each branch water channel. The Yellow River water flow is used for water conservancy power generation, and the permanent water flow can meet the navigation, reduce the logistics transportation cost, the planting of high-quality trees improves the ecological environment, and the ecological and economic benefits are improved.

The application discloses an estuary sediment transport simulation method considering environmental factor coupling and belongs to the technical field of near-shore ocean deposition dynamics, which comprises the following steps: processing target sea area geographic data, constructing a non-structure calculation grid area of the target sea area and generating an initial terrain field; setting boundary conditions and an initial field for the target sea area, and constructing a three-dimensional hydrodynamic numerical model; using multi-source observation data to systematically verify and parameterize the three-dimensional hydrodynamic numerical model of S2; based on the three-dimensional hydrodynamic numerical model verified in S3, a three-dimensional hydrodynamic-sediment coupling numerical model considering environmental factor driving is constructed; and using multi-source observation data to systematically verify and parameterize the three-dimensional hydrodynamic-sediment coupling numerical model of S4. The application establishes a real-time dynamic coupling relationship between environmental factors and sediment settling velocity by modifying the sediment settling velocity equation, represents the flocculation effect of high-concentration fine-grained sediment in an estuary, and improves the accuracy of suspended sediment concentration simulation.

This invention belongs to the field of environmental monitoring technology and discloses a remote sensing inversion method for dissolved inorganic nitrogen and silicate in estuaries based on salinity synergy. The method includes the following steps: S1. During a field survey in the land-sea interaction zone of the estuary, remote sensing reflectance, salinity, and nutrient data are collected simultaneously. The measured hyperspectral reflectance is simulated as the equivalent reflectance of the satellite band using the spectral response function of the target satellite, which is used to construct the training and validation datasets for the model. S2. A nonlinear inversion model of remote sensing reflectance and salinity is established, and a nutrient mixture model of salinity and nutrients is constructed. The training dataset is used for model training. S3. The satellite remote sensing reflectance data of the estuarine area to be predicted is input into the trained nonlinear inversion model and combined with the nutrient mixture model to generate the spatial distribution of DIN concentration and DSi concentration in the estuarine area. This method achieves high-precision remote sensing inversion prediction of DIN concentration and dissolved silicate DSi concentration in the estuarine area.

The present application relates to the field of image processing, in particular to a water pollution real-time monitoring method, device and system of an estuary river, which is used to solve the technical problem of low water pollution monitoring accuracy caused by the interference of the water surface reflection area of the estuary river. The method comprises: collecting continuous frame images of the water surface of the estuary river; converting the continuous frame images into pulse count maps, identifying the reflection area according to the pulse count maps, and determining the static reflection degree of the reflection area; determining the dynamic reflection degree of the reflection area based on the optical flow information of the continuous frame images; weakening the brightness of each pixel in the reflection area according to the static reflection degree and the dynamic reflection degree; inputting the image after brightness weakening into a target detection model to monitor the water pollution of the estuary river.

This invention discloses a siltation early warning method based on the fusion of towed sonar and multi-source hydrological parameters, belonging to the field of underwater topographic monitoring and engineering safety early warning technology. The method first plans the survey lines for the target area and simultaneously collects multibeam sonar bathymetry data, CTD multi-parameter data, platform attitude data, tow cable status data, positioning and navigation data, and time synchronization information during towed platform operation. Then, it performs time alignment, outlier removal, missing value compensation, and noise suppression on the multi-source data. A sound velocity profile is constructed based on the CTD multi-parameter data, and the sound velocity of the multibeam sonar bathymetry data is corrected. Geometric compensation is also performed by combining platform attitude data, tow cable status data, and positioning and navigation data. Finally, the corrected bathymetry data is... The results are mapped to a preset coordinate system to construct an underwater cross-section model, a grid elevation model, or a bed sediment point cloud model for the current time period. Historical baseline models are retrieved for coordinate unification, overlapping area identification, and adaptive registration. Based on this, elevation difference analysis, slope change analysis, regional thickness statistics, and calculations of sediment thickness, changed area, and sediment volume are performed. Furthermore, short-term trend predictions are made by combining historical observations from multiple time periods with environmental driving factors such as flow velocity, tide level, temperature, salinity, turbidity, and sediment content. Finally, a warning level is generated based on a risk threshold, and warning information is output. This invention improves the comparability of multi-time period towed sonar measurement results and the accuracy of sediment identification, enabling continuous monitoring, quantitative analysis, and proactive warning of bed sedimentation status in target areas. It is applicable to port channels, inland waterways, estuaries, reservoir areas, and near-shore engineering areas.

This invention relates to a method and system for constructing an explicit unstructured two-dimensional hydrodynamic model. The method includes constructing an unstructured mesh and identifying wet and dry states based on critical water depths, adapting to complex boundaries; discretizing the governing equations using the finite volume method based on conserved two-dimensional shallow water equations, and simultaneously solving the pressure and velocity terms through an explicit pressure-velocity coupling mechanism to achieve flow field prediction and correction and water depth updates; and combining optimization techniques such as adaptive time stepping and vectorization acceleration to perform time-iterative calculations and output visualized results. Its advantages include: effectively suppressing numerical oscillations under explicit in-situ meshes without requiring implicit or iterative algorithms, thus improving simulation accuracy and stability; improving computational efficiency through algorithm optimization, supporting large-scale mesh simulations; and adapting to complex boundaries such as estuaries and coastlines, providing a scientific basis for integrated estuarine and coastal management and intertidal ecological protection and restoration.

The utility model discloses an automatic three-dimensional laser scanner for topographic surveying and mapping of a water and sediment physical model, which comprises a support rod, a balance structure and a laser scanning device, the support rod is provided with a support table and a three-dimensional laser scanner, the balance structure comprises a storage plate arranged on the support rod, and the storage plate is arranged on the support rod. And a folding support plate for supporting the support rod is arranged in the storage plate. According to the automatic three-dimensional laser scanner for topographic surveying and mapping of the water-sediment physical model, the balance structure comprising the folding support plate is arranged on the support rod, so that the folding support plate can be unfolded according to complex terrains such as soft and easy-to-settle beaches of estuaries and coasts, and the support area is increased to disperse the pressure of the support rod on a foundation; the problems of collapse and inclination of a traditional supporting rod caused by terrains are effectively solved, stable installation of the three-dimensional laser scanner is ensured, and the operation efficiency is improved. And the magnet on the connecting plate is matched with the surrounding type balance structure.

The invention provides a one-dimensional and two-dimensional coupling calculation method and system for river network nuclide migration and diffusion, and the method comprises the steps: predicting the spatial and temporal distribution of radionuclides in a whole river network through a one-dimensional model, and extracting a nuclide flux time sequence at the intersection section of the river network and a two-dimensional calculation domain; sorting the nuclide flux time sequence and generating an interface file in a standard format; based on data in the interface file, performing intelligent local encryption on a two-dimensional calculation grid in an entrance area where the one-dimensional river network and the two-dimensional water area intersect; and based on the encrypted grid and the interface file, setting a dynamic source item boundary of the two-dimensional numerical model, synchronously promoting coupling calculation of the one-dimensional numerical model and the two-dimensional numerical model, and simulating continuous migration of nuclides from the river network to the estuary. According to the one-dimensional and two-dimensional coupling calculation method for river network nuclide migration and diffusion, rapid calculation of efficient and precise coupling of the one-dimensional model and the two-dimensional model is achieved, and the simulation precision of a key area is guaranteed.

This invention relates to a method for assessing the efficiency of Arctic marine biological carbon pumps and providing early warning of carbon sink depletion, falling under the field of data processing and analysis technology, including acquiring target data sources. The invention improves the resolution of estuaries and erosion hotspots by employing adaptive grid refinement, enhancing the characterization accuracy of terrestrial material diffusion processes while reducing computational resource consumption. It establishes a multi-level degradation parameterization of organic matter, distinguishing between active, semi-active, and inert organic matter. The invention introduces excitation effects and ultraviolet light degradation modules, reducing the systematic bias in remineralization rate estimation and increasing the additional degradation contribution from excitation effects in the shelf region. Furthermore, it employs a nonlinear depth-adaptive remineralization parameterization, using a hyperbolic tangent threshold function and an exponential saturation function to respond to temperature and organic matter quality, capturing the nonlinear jump in remineralization rate after Arctic temperatures cross the freezing point threshold, thus reducing the prediction error of deep carbon sequestration efficiency.

This utility model discloses a waterway protection and interception device for marine environmental management, including a mounting plate. An electric push rod is mounted on the upper surface of the mounting plate, and a hinged rod is mounted at the output end of the electric push rod. Interception plates are symmetrically hinged to the circumference of the hinged rod. Several slots are equidistantly formed on the upper surface of the interception plates, and limit grooves are symmetrically formed on opposite surfaces of the inner walls of the slots. Several threaded holes are equidistantly formed on one side of the interception plates. An interception net is installed in each slot, and limit blocks are formed on opposite surfaces of the interception net. This utility model is installed at the river estuary using the mounting plate and fixed with mounting bases. The interception plates, hinged on both sides, are rotated around the hinged rod as the origin to control the distance between the mounting boxes on both sides. This allows the interception plates to be adjusted into a "V" shape, guiding the garbage flow to the collection boxes on both sides. The garbage then flows into the collection boxes through inlets on one side of the mounting boxes for collection.

The application provides a kind of based on dynamic tracing estuary multi-source pollution monitoring method and system, the method comprises: obtaining the pollution information of the estuary of target water area;Obtain the pollution information of the pollution point of target water area;Construct multi-source pollution convection diffusion model;The pollution information of the estuary of target water area and the pollution information of the pollution point of target water area are input into the multi-source pollution convection diffusion model, obtain the pollution concentration value of each pollution point diffused to the estuary;According to the pollution concentration value corresponding to each pollution point, obtain the pollution contribution degree of each pollution point to the estuary;According to the pollution contribution degree corresponding to each pollution point, combined with the preset water area monitoring criterion, carry out pollution point monitoring to target water area. Thus, by applying the method described in the application, the tracing, monitoring and management efficiency of estuary pollution can be improved.

The invention relates to the technical field of water conservancy projects and disaster prevention and reduction, and discloses a multi-branch estuary toughness evaluation method which comprises the following steps: establishing an estuary directed graph, collecting real-time water level and flow velocity, and extracting a quiescent working point by utilizing low-pass filtering; calculating differential real part resistance and wave flow coupling imaginary part reactance, and synthesizing dynamic differential complex impedance; performing open circuit or short circuit reconstruction according to the impedance and energy flow state to generate a variation topological graph; constructing a Laplacian matrix to extract algebraic connectivity, and calculating a system toughness index in combination with the residual moisture capacity; and finally, comparing the index with a threshold value, identifying a key impedance bottleneck and outputting a water conservancy scheduling suggestion. According to the method, the dynamic differential complex impedance model based on fluid working point linearization is constructed, and the specific hidden risk of channel physical smoothness but hydrodynamic force blocking in the estuary area can be sensitively captured by introducing the wave flow coupling imaginary part reactance.

The invention discloses marine litter detection and interception equipment for an estuary, and belongs to the technical field of litter interception, the marine litter detection and interception equipment comprises a base plate, a driving shaft and a third collection cavity, a drainage groove is formed in the bottom of the base plate, and the marine litter detection and interception equipment further comprises a filtering mechanism and multiple sets of supporting frames arranged at the bottom of the base plate. According to the device, driving blades are driven to rotate through water flow, first sliding blocks are driven to circularly move in annular grooves, multiple sets of filtering blades are driven to integrally do harmonic motion through cooperation of second sliding blocks and rectangular rods, and the dynamic filtering and conveying effects on filtered objects are achieved; a liquid film is formed between the filtering blade and a filtered object, and the adhesion force between the filtering blade and pollutants, especially hydrophobic film plastic, is reduced through the dual effects of jet fluid dynamic lubrication and interfacial tension destruction, so that the adhesion blockage of light film plastic garbage is reduced; meanwhile, auxiliary power can be provided for directional migration of filtered pollutants.

The invention provides an estuary water ecology monitoring method based on diatom indication species identification and environmental response. The estuary water ecology monitoring method comprises the following steps: sampling a monitored estuary to obtain water ecology monitoring data including water environment factors and diatom population data; diatom indicator species are identified by adopting a biological indicator value method; acquiring time sequence data of the same diatom indicator species in the sedimentary column by adopting a sedimentary chronology method; obtaining a mutation point of the time sequence of the diatom indicator species through MK inspection; a random forest model between water environment factors and diatom indication species is trained; setting water environment scene data to be input into the random model, obtaining an abnormal scene in which the predicted data of the diatom indication species exceeds the mutation point, and obtaining a water environment factor threshold according to the abnormal scene. The problems that in the prior art, indication species cannot be recognized by quantifying the relation between diatom population and environmental factors, and mutation points of ecological abnormality are difficult to recognize by obtaining the historical evolution law of the indication species, so that the pertinence of a monitoring result is weak are solved.

The application discloses a method for preventing and treating saltwater intrusion of an aquifer at the bottom of a river estuary channel by building an anti-seepage layer, and comprises the following steps: obtaining hydrogeological data of a prevention and treatment area, determining the size of the area to be prevented and treated according to the expected effect of the project; solidifying the bed of the prevention and treatment area by using a solidifying agent material; performing leveling treatment on the solidified area; laying the anti-seepage layer on the surface of the solidified bed; performing smoothing treatment on the connecting area between the anti-seepage layer and the surrounding bed; and laying a protective layer on the surface of the anti-seepage layer. Compared with the existing method for preventing and treating seawater intrusion, the method has the advantages of relatively simple construction arrangement, small investment cost, low maintenance cost in the later period, and the like, can effectively prevent and treat saltwater intrusion from the bottom of the river channel into the coastal underground aquifer, and has a good application prospect.