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59 results about "Water quality modelling" patented technology

Water quality modeling involves the prediction of water pollution using mathematical simulation techniques. A typical water quality model consists of a collection of formulations representing physical mechanisms that determine position and momentum of pollutants in a water body. Models are available for individual components of the hydrological system such as surface runoff; there also exist basinwide models addressing hydrologic transport and for ocean and estuarine applications. Often finite difference methods are used to analyse these phenomena, and, almost always, large complex computer models are required.

Urban and rural overall planning water supply pipe network hydraulic water quality simulation platform

The invention discloses an urban and rural overall planning water supply pipe network hydraulic water quality simulation platform, and belongs to the technical field of pipe network operation monitoring intelligence, and comprises an online alarm early warning module, an optimal scheduling management module, an accident emergency disposal module, a leakage monitoring alarm module and a system configuration module. The on-line alarm early warning module monitors the hydraulic condition and the water quality condition at the current moment on line through the system and predicts the hydraulic and water quality trend in the future 24 hours. The optimization scheduling management module comprises three parts of hydraulic optimization scheduling management, water quality optimization schedulingmanagement and a scheduling expert database. The leakage monitoring and alarming module simulates the influence caused by an accident point and the range of an affected area through the operation online model, and the model is used for making various water plant pump station scheduling schemes. Research and analysis of various plans are provided for a decision maker to simulate a decision processand a scheme environment, and meanwhile various information sources and analysis tools are accessed to help the decision maker improve the decision level and quality.
Owner:SOUTHEAST UNIV +3

Watershed water environment safety early warning method and watershed water environment safety early warning system

The invention provides a watershed water environment safety early warning method and a watershed water environment safety early warning system. The method comprises the following steps of performing investigation, analysis and selection on models according to model characteristic factors, wherein the models include a social economy and resource utilization model, a land utilization prediction model and a watershed non-point source pollution load simulation model and a watershed water environment hydrodynamic water quality simulation model; performing integration on the selected models; performing simulation and prediction on the water environment by using research area environment data and using the integrated models to obtain the prediction result; and performing early warning judgment according to the prediction result and providing warning information. By setting the social economy and resource utilization model, the land utilization prediction model, the watershed non-point source pollution load simulation model and the watershed water environment hydrodynamic water quality simulation model and performing selection and integration on the models, the adaptation to different scenes, environments and requirements can be realized; the water environment safety early warning can be comprehensively and integrally generated; and the stability and the accuracy of the water environment safety early warning are improved.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI

Non-uniform high-precision curved surface grid water flow and water quality simulation and visualization method and system

ActiveCN108629135ARealize real-time visual simulationImprove simulation accuracyGeneral water supply conservationDesign optimisation/simulationTerrainTopographic gradient
The embodiment of the invention provides a non-uniform high-precision curved surface grid water flow water quality simulation and visualization method and a system. The method and system are specificas following: firstly, the preset spatial scale is selected from the obtained river topographic data, and the high-precision surface model is established to a high-precision curved surface grid M1 ofa river channel; secondly, the grid unit which satisfies the terrain gradient change condition and the key research area in the M1 is subjected to a division and encryption process to generate a layered high-precision curved surface mesh M2; moreover, the two-dimensional water flow and water quality models are solved by two-dimensional discrete solution, and in that model calculation, the M2 can be used for dynamically dividing and merging the grid unit which meets the condition according to the change state of the water quality and the water flow; finally, the water flow and the water qualitystate information are visualized and mapped by the constructed three-dimensional virtual simulation platform to realize the visual simulation of the water flow and water quality based on the three-dimensional virtual environment. Therefore, the support platform can be provided for the implementation of the flood control disaster reduction, the water environment protection and the river long system and the most strict water resource management system.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES

Water quality information computing device and method

InactiveCN102608282AAchieving Concentration PredictionTesting waterChemical reactionSystem dynamics model
The invention provides a water quality information computing device and a water quality information computing method, which are used for simulating and computing a concentration of pollutants in a water pollution accident, wherein the water quality information computing device comprises an information input module, a computing module and a displaying module, wherein the information input module is used for inputting information for reflecting the concentration of pollutants in an upper reach, the computing module is used for computing the concentration of pollutants of polluted water quality of a lower reach by using a one-dimensional water quality simulating system dynamics model according to input information of the information input module, and the displaying module is used for displaying the information input by the information input module and a computing result output by the computing module. According to the water quality information computing device disclosed by the invention, the system dynamics is applied to a dynamic simulation research of water quality variation of water pollution accidents. The one-dimensional water quality simulating system dynamics model is established to carry out dynamic analogue simulation on the concentration variation of the pollutants in rivers due to physical, chemical and biological processes caused by convection, diffusion, attenuations caused by chemical reactions and biological absorption and the like, so that the concentration of the pollutants in a downstream section is forecasted.
Owner:生态环境部信息中心

Method for predicating and analyzing water quantity and quality coupling simulation in oversized river basin

The invention belongs to the technical field of a water environment simulation method, and particularly relates to a method for predicating and analyzing the water quantity and quality coupling simulation in an oversized river basin. The method comprises river basin multi-box division, single-box pollution check computation, single-box water quantity and quality coupling mode establishing, multi-box nesting and multi-box water quantity and quality coupling simulation. The method is mainly characterized in that a box body model and a water quantity and quality coupling theory are integrated into an oversized river basin (such as the Three Gorges river basin, the Yangtze river basin, large-scale lakes and water reservoirs) water quality simulation process so as to carry out system simulation and predication on water quantity and quality conditions in the oversized river basin. The method disclosed by the invention has the advantages that the computation is efficient, the operation is convenient, the requirements on data information are less, the complex problems caused by size difference and uncertainty are effectively treated, the technical defect of the water quantity and quality coupling simulation of the oversized river basin is filled, and information such as water pollution situation is provided for river basin management.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Plain river network area water environment monitoring early warning and safety guarantee management system

The invention provides a plain river network area water environment monitoring early warning and safety guarantee management system comprising a basic information management module which is used for establishing a basic information database of water systems, monitoring points, pollution sources, social economy, municipal facilities and safety guarantees; a water environment analysis and evaluationmodule which is used for carrying out water quality analysis, generating a water quality report and providing historical data query; a water environment monitoring and early warning module which is used for carrying out early warning information configuration, water quality and pollution source standard exceeding early warning, monitoring and early warning management, water quality simulation prediction and traceability analysis; and a water environment risk management and control module which is used for carrying out risk source management, sensitive source management, enterprise risk assessment and regional risk assessment. Comprehensive management of the water environment of the plain river network area can be enhanced, and the safety of the water environment of the plain river networkarea is improved.
Owner:常州市环境科学研究院

Water quality simulation method based on GLUE multi-target water quality model calibration

InactiveCN103914586ASatisfy the simulation effectAvoid "overfitting" phenomenonGeneral water supply conservationSpecial data processing applicationsAir quality indexWater quality modelling
The invention relates to a water quality simulation method based on GLUE multi-target water quality model calibration. The method includes the following steps: 1) conducting parameter sensitivity analysis on a water quality model according to an overall sensitivity analysis method and conducting screening to obtain multi-target sensitive parameters according to the obtained sensitivity indexes; 2) generating a water quality random parameter group according to the prior sample distribution condition of the screened multi-target sensitive parameters; 3) simulating water quality indexes in the random parameter group, conducting screening through a likelihood function to obtain sensitive parameter intersection of various water quality indexes in an iteration mode, and finally enabling the parameters to be converged in a smaller section to achieve high accuracy water quality simulation. By means of the method, the optimum parameter combination is determined through simultaneous calibration of various output indexes, the water quality indexes can be simulated accurately and effectively, and the method provides accurate quantitative theoretical support for follow-up water environment water quality management, prediction, assessment and the like.
Owner:CAPITAL NORMAL UNIVERSITY +1

Water supply network pollution source positioning method based on multi-population co-evolutionary algorithm

The invention discloses a water supply network pollution source positioning method based on a multi-population co-evolutionary algorithm. The method comprises the following steps: acquiring pollutant concentration detected by each water quality sensor in a water supply network; using the multi-population co-evolutionary algorithm for generating several initial contamination accident at random; simulating the pollutant concentration, performing hydraulic simulation and water quality simulation based on the contamination accident to obtain a pollutant concentration simulation result; matching the pollutant concentration and the pollutant concentration simulation result to obtain a matching error; when the matching error is greater than a set error, using the multi-population co-evolutionary algorithm to adjust and optimize the direction according to the matching error for a cyclic search until a globally optimal solution is found; and determining and finding the pollution source position when the matching error is in a set error range. According to the water supply network pollution source positioning method, the pollution source can be rapidly and accurately positioned, pollution information can be accurately provided, and technical problem that in prior art, it is difficult to rapidly and accurately position the pollution source in a large scale water supply network can be solved.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Water quality rapid simulation method and system based on water environment coupling model

The invention discloses a water quality rapid simulation method and system based on a water environment coupling model. The method comprises steps that topographic data in a simple form is prepared through actual measurement data or a remote sensing image so as to generate a two-dimensional topographic grid; a standard data framework is built, and various pollution factors such as a non-point source, a point source and an endogenous source and the whole process of hydrodynamic force and water quality migration and transformation are comprehensively considered; the invention discloses a reasonable value range of recommendation parameters and an adjustment method, and provides a set of thought for rapid verification of a coupling model. A water environment capacity calculation model with a point source as an accurate control target is embedded, and visual expression of water quality simulation and analysis results is achieved. According to the water quality simulation method and system provided by the invention, multiple types of pollution sources are considered, the physical mechanism process is comprehensive, compared with a traditional water quality loose coupling simulation mode,data processing is simpler and more efficient, the obtained water quality prediction result is more accurate, and actual management of the water environment quality can be served.
Owner:WUHAN UNIV

Water supply pipe network sensor arrangement optimization method based on multiple particle swarm optimization algorithm

The invention discloses a water supply pipe network sensor arrangement optimization method based on a multiple particle swarm optimization algorithm. The method includes: a pipe network topology structure of a water supply pipe network is established, the complexity of each pipe network node in the water supply pipe network is obtained, hydraulic simulation and water quality simulation of the pipe network topology structure are performed, and the accessibility and the pollutant concentration of each pipe network node are obtained; population initialization of the multiple particle swarm optimization algorithm is performed at a main calculating node, and global search is conducted in the MAP stage; local search is conducted in the Reduce stage, and the newest global optimal individual is obtained; whether the fitness of the newest global optimal individual satisfies a preset convergence condition is determined, and if the fitness does not satisfy the preset convergence condition, iteration evolution is continued via moving to the task distribution step. According to the method, the technical problem of long optimization time of water supply pipe network sensor arrangement in the prior art is effectively solved, the monitoring effect is maximized (such as detecting pollution events with the fastest time), and safety risks due to pollution of drinking water are prevented.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Experiment system for low impact development facility water quality simulation

The invention relates to an experiment system for low impact development facility water quality simulation. The experiment system comprises an LID facility water quality simulation unit, an artificial rainfall control unit and a sample collection unit, wherein the LID facility water quality simulation unit comprises an experiment box (12) and an LID facility, the experiment box (12) and the LID facility are arranged in a side-by-side manner, the top portion of the experiment box (12) is opening, the LID facility is arranged inside the experiment box (12) and is communicated to the sample collection unit, the artificial rainfall control unit comprises a mixing assembly, a water supply assembly and a spraying assembly, the mixing assembly, the water supply assembly and the spraying assembly are sequentially connected through water conducting pipes (4), and the spraying assembly is arranged above the experiment box (12), and is arranged opposite to the LID facility. Compared with the experiment system in the prior art, the experiment system of the present invention has advantages of simple structure, convenient operation, economy and practicality, and is suitable for the low impact development facility water quality simulation research in the room, and further has the water amount simulation function.
Owner:TONGJI UNIV

Method for predicting influence of tidal action on river water quality based on river water quality model

ActiveCN110751331AMake up for the defect of low accuracy of water quality simulationPrecise and effective means of river pollution controlForecastingDesign optimisation/simulationAmmoniacal nitrogenEnvironmental engineering
The invention discloses a method for predicting influence of tidal action on river water quality based on a river water quality model in the technical field of water quality prediction. The problem that in the prior art that a traditional river water quality model is low in tidal reach water quality simulation accuracy is solved. According to the method for predicting the influence of the tidal action on the river water quality based on the river water quality model, the defect that a traditional river water quality model is low in accuracy of simulating the water quality of the tidal reach isovercome, and the method has important significance in pollutant control of the tidal reach seriously affected by the tidal action. Compared with a previous tidal influence evaluation means, the method has the advantages that the influence of the tidal action on the concentration of pollutants such as ammonia nitrogen and total phosphorus in the tidal river reach can be quantitatively identifiedon the basis of the river hydraulic water quality model, so that a more accurate and effective river pollution control means can be provided.
Owner:HARBIN INST OF TECH

Water quality simulation method and system for river basins

The embodiment of the invention provides a water quality simulation method for river basins. The method comprises the following steps: dividing a river basin into a plurality of sub-basins, and acquiring data of each sub-basin in a specified time range; Taking the rainfall capacity and the potential evaporation capacity of each sub-basin as first input parameters, determining the effective rainfall capacity of each sub-basin through a nonlinear module of the hydrological model, taking the effective rainfall capacity of each sub-basin as second input parameters, and determining the non-point source runoff of each sub-basin through the linear module of the hydrological model; And taking the non-point source runoff volume, the temperature, the water quality detection value and the river hydrological data of each sub-basin as third input parameters, and obtaining a water quality simulation result of the river basin through a water quality analysis model. The embodiment of the invention further provides a water quality simulation system for the river basin. According to the embodiment of the invention, the influence of non-point source pollution on river water quality is considered in water quality simulation, and the accuracy of water quality prediction is improved.
Owner:BEIJING INSIGHTS VALUE TECHNOLOGY CO LTD

MIKE21 and blind number theory-based rain source type river water environment capacity calculation method

The invention provides an MIKE21 and blind number theory-based rain source type river water environment capacity calculation method. The method comprises the following steps: 1) constructing a targetriver MIKE21 hydrodynamic water environment mathematical model according to basic data and performing calibration; 2) dividing the target river into a plurality of unit river sections according to thedistribution of each river branch of the target river, extracting flow, flow velocity and water quality simulation data results of the target river main stream and each river branch based on a mathematical model, and determining a corresponding blind number form; and 3) according to the water environment capacity calculation model of the rain source type river, respectively calculating the waterenvironment capacity value of each unit river reach based on blind number operation and a blind number mean value, and determining the water environment capacity values of each unit river reach of thetarget river and the whole river. According to the method, the uncertainty of various parameters in the target river water environment system is fully considered, the calculation is relatively simpleand convenient, the credibility of the calculation result is relatively high, and the water environment conditions of each unit reach of the rain source type river and the whole river can be scientifically and accurately evaluated.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION

Reversal design method determining secondary river maximum main river inflow rate

The invention discloses a reversal design method determining secondary river maximum main river inflow rate; the method comprises the following steps: 1, building a water quality optimization model to carry out water quality simulation, determining decision variables and constraint conditions, and changing flow setting of each secondary river so as to form different conditions; 2, using water quality model simulation results under different conditions as nerve network training samples, building a nerve network and training the nerve network so as to realize non-linear function fitting, thus allowing the trained network to predict the water quality conditions in a primary river control section; 3, using a heredity algorithm to randomly form certain number of individuals as the initial population, using the well trained and improved nerve network as constrained conditions so as to determine and screen the individuals, selecting individuals satisfying water quality conditions and with high adaption level, using intersection and variation to obtain a novel population, thus obtaining the optimal design scheme for each secondary river flow regulation and control. The reversal design method can provide more improved design for the river water quality simulation technology.
Owner:TIANJIN UNIV

Long-distance water delivery open channel water quality simulation prediction method and system

The invention relates to a long-distance water delivery open channel water quality simulation prediction method and system. The method comprises the following steps: according to the trend of a water delivery open channel, a plurality of dry and wet settlement monitoring devices being arranged along the channel, and obtaining the atmospheric sediment mass and rainfall; determining the pollutant source intensity in dry sedimentation according to the mass of the atmospheric sediments; determining the pollutant source intensity in wet sedimentation according to the rainfall; constructing a long-distance water delivery open channel water quality model considering the influence of dry and wet sedimentation based on the pollutant source intensity in dry sedimentation and the pollutant source intensity in wet sedimentation; conducting discrete processing on the long-distance water delivery open channel water quality model, and determining the long-distance water delivery open channel water quality model expressed in a differential format; and obtaining actual measurement data of the water delivery open channel, taking the actual measurement data as a boundary condition of the long-distance water delivery open channel water quality model expressed by the difference format, solving the long-distance water delivery open channel water quality model expressed by the difference format according to the boundary condition, and determining the water quality of the water delivery open channel. The method can accurately evaluate the water quality of the large water delivery open channel.
Owner:YANGTZE RIVER WATER RESOURCES PROTECTION SCI RES INST

Sewage treatment plant deep well aeration process optimization method and device based on ASM2D model

The invention discloses a sewage treatment plant deep well aeration process optimization method and device based on an ASM2D model. The method comprises the steps: acquiring the process structure water amount of a sewage treatment plant, the inlet and outlet water quality of each stage, process operation energy consumption data and operation parameters of each process stage; establishing a simulation model for process simulation by utilizing ASM2D, inputting the acquired data and parameters into the established model, simulating the operation process of the deep well aeration process, carryingout sensitivity analysis on model parameters by utilizing the simulation model, and adjusting simulation model parameters; according to the established simulation model, performing control strategy simulation to adjust the equation parameters corresponding to the DO concentration, the internal reflux ratio and the external reflux ratio of the aeration tank, and outputting a water quality simulation result; and according to the water quality simulation result, on the premise that the effluent quality meets the discharge requirement, selecting a control strategy with low input energy consumption, and making suggestion of the actual operation parameters of the deep well aeration process. According to the invention, a deep well aeration process mechanism is embodied, a control strategy can besimulated and optimized, and the process operation cost is reduced.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP

Global toughness efficient evaluation method for water supply pipe network water quality monitoring system

The invention discloses a global toughness efficient evaluation method for a water supply pipe network water quality monitoring system. The water quality monitoring system global toughness efficient evaluation index based on water quality monitoring point failure is provided for the first time, and is used for evaluating the pollutant invasion resistance of the water quality monitoring system under the failure working conditions of different numbers of monitoring points. Meanwhile, the invention provides a pollution event database construction method based on data driving. In the optimizationmodel solving process, the target function is calculated by directly reading the related data in the database, time spent on repeatedly operating hydraulic power and water quality simulation is avoided, compared with a traditional method, the solving efficiency of the optimization model is improved by ten thousand times or above, and the method has obvious advantages particularly when the problemof a large complex actual water supply pipe network is solved. According to the monitoring point importance degree quantification method, the monitoring points with high priorities are maintained, sothat the water quality safety risk of the water supply system can be reduced, and the water supply safety is guaranteed.
Owner:ZHEJIANG UNIV
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