59 results about "Water quality modelling" patented technology

The invention provides a water-quality simulation method based on control-unit water-environment-quality target management. The water-quality simulation method includes the steps that a database is built; a land-field control unit and a river-way subunit are divided; the flow, the area of the water surface and the volume of a water body of calculation unit grids are simulated through a hydraulicsmodel; the generation quantity of non-point-source pollutants in pollution sources is calculated through an output coefficient model, and the in-river sewage amount and the pollution load concentration of pollutants of a pollutant discharging opening are calculated; the water quality of the calculation unit grids is simulated through a one-dimensional water-quality model. In the water-quality simulation method, an emergent risk accident pollutant-discharging water-quality model is also used, and is used for simulating transmission of accident pollutants in a river network and the changing condition of the water quality of a downstream drainage basin after emergent-water-environment-risk-accident pollutant discharging.

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.

The invention discloses a river lake water body quantity-quality coupling self-optimizing simulation regulation and control method which comprises the steps that first, a water body quantity-quality coupling simulation model in a river lake zone to be regulated and controlled is established; second, according to the water body quantity-quality coupling simulation model and a current decision scheme, the simulated results of the water quantity, the water level and the water quality of the river lake zone to be regulated and controlled are obtained; third, the water quantity, the water level and the water quality are used as decision targets, an optimization decision zone of a river lake water body system is established; fourth, whether the simulated results of the decision targets meet the requirement of the river lake water body system at the same time is judged, and the current decision scheme is corrected according to the judging results. According to the method, the water quantity, the water level and the water quality of a river lake water body are regulated and controlled in a combining mode, and accordingly water resource efficient allocation is achieved.

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.

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.

A watershed water environment operational operation and management platform comprises a water quality data collection module (1), a water quality data evaluation module (2), a water quality monitoringand early warning and prediction module (3), a water environment supervision and management module (4), a water quality simulation and prediction module (5), an intelligent report module (6), an auxiliary decision support module (7) and a basic map window operation (8). Based on the environmental hydrodynamics model, Combined with the bottom GIS development technology, adopting the WebService multi-level mixed system structure, it is developed on the basis of the watershed basic geographic information database, water environment management database and numerical simulation model database. Itcan provide an efficient and visual decision-making tool for the water environment management of the environmental protection and management department.

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.

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.

The invention discloses a water quality simulation method and device, and the method comprises the steps of drawing discrete points along the boundary of a river channel, and constructing a triangulargrid based on the discrete points and the geographic information of the river channel to serve as the grid of a hydrodynamic model; fusing multi-dimensional information of the still water state of the river channel, and mapping the multi-dimensional information into initial values of grids in the hydrodynamic model; based on the collected observation value of each grid and the simulation value ofthe hydrodynamic model, dynamically updating the forecast part of the hydrodynamic model to obtain a forecast value; and on the basis of the observation value and the prediction value of each grid, carrying out the parameter calibration on the control equation of each water quality index so as to simulate and predict the diffusion of the water quality indexes. According to the scheme provided bythe embodiment of the invention, the hydrodynamic model can be applied to water quality simulation, and the water quality change condition of a river reach is obtained through simulation by simulatingthe diffusion effect of water flow.

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.

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.

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.

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.

The one-dimensional unsteady river hydrodynamic force-water quality simulation method and device provided by the invention have the advantages of comprehensiveness, comprehensiveness, scientificity and credibility. The method comprises the following steps that a time sequence, spatial data and control parameters of a river are obtained, the time sequence comprises flow, water quality and pollutiondischarge, the spatial data comprise river channel topography, a river network structure and a building structure, and the control parameters comprise hydraulic parameters, hydrological parameters and water quality parameters; performing unsteady-state river hydrodynamic simulation calculation and unsteady-state river water quality simulation calculation according to the time sequence, the spatial data and the control parameters of the river to obtain time sequence data of the water level, the flow, the flow velocity and the water quality of the inspection point; and outputting time series data of the water level, the flow, the flow velocity and the water quality of the investigation point.

The invention obtains a sewage treatment system which can be automatically operated while properly setting the operation condition of reducing surplus sludge according to the condition change of water quality, water quantity, water temperature, and the like with improving water quality of treated water or without deteriorating the water quality, and optimizing the driving operation amount of an oxygen supply blower. The sewage treatment system comprises a water quality simulator 8 that calculates water quality by using an activated sludge model representing microorganism reactions in a biological reaction tank 2, a control device 9, and a data storage device 10. Easily biodegradable organic matter data of a sludge improvement device 7 are fetched into the water quality simulator 8, and the driving operation amount of the sludge improvement device 7 and the driving operation amount of the oxygen supply blower 3 for the biological reaction tank 2 are controlled from the results of water quality calculation by the water quality simulator 8.

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.

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.

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.

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.

The invention provides a binary water right accounting transaction method and system. Through constructing a regional water resource and water environment simulation model and establishing a dynamic function relationship between total water intake control outside the riverway and total pollution discharge control inside the riverway, the regional water quantity and water quality simulation are brought into accounting of the water right value; the influence of a human water taking and pollution discharge process on the available quantity of regional water resources and the water environment quality can be identified; the conversion relation between the distributable water intake amount and the sewage discharge amount under certain water supply conditions and water quality management targetsis reflected, and a simple and effective solution is provided for scientifically measuring the transaction value of the water intake right and the sewage discharge right and realizing the cooperativecontrol of the total water intake amount and the total sewage discharge amount.

The invention provides an EFDC model calculation result visualization method and system. The method comprises: converting an EFDC model calculation grid into GIS data; publishing the EFDC model calculation grid and the background geographic data into a map service through a GIS server; converting a calculation result into a 'time sequence-analog value format' for storage; storing analog values ofall grids at a certain moment in a database; querying an EFDC calculation result, and transmitting the calculation result in the form of two-dimensional data; and loading background geographic data from a GIS server side, rendering the background geographic data to the bottom layer of a map window, establishing the corresponding relation between the water quality simulation value and the calculated grid color, expressing the water quality factor concentration by calculating the depth of the grid color, and dynamically rendering the water quality simulation resultthrough WebGL. By means of themethod, efficient storage, query and transmission of the EFDC calculation result and visual display based on WebGIS are achieved.

The present disclosure refers to a method and a system of sudden water pollutant source detection by forward-inverse coupling, including: building an one-dimensional forward water quality simulation model of a river way according to acquired mechanical parameters and water quality parameters; according to the one-dimensional forward water quality simulation model of the river way, measuring and calculating each monitoring index by using an inverse optimization source-detection model; by constructing the one-dimensional forward water quality simulation model of the river way, using the inverse optimization source-detection model for measurement and calculation; and performing the Bayesian updating, in order to realize multi-information fusion. The present disclosure may reasonably control and use different observation information, and combine the redundancy or complementarity of multi-sourced information in space or in time to obtain consistent interpretation of the measured object, thus overcoming the uncertainty of the water environment, improving the accuracy of water pollutant source detection.

The invention discloses a basin water quality real-time simulation method based on general calculation. The basin water quality real-time simulation method comprises the following steps: dividing basin grids under a general calculation framework; and performing parallelization design of a basin water quality model, wherein the step S1 comprises sequentially executing contents listed in 1.1, 1.2 and 1.3; 1.1, dividing basin grids in a grid mode; 1.2, defining a simulation grid; 1.3, constructing a grid neighborhood topology, and the step S2 comprises sequentially executing contents listed in 2.1, 2.2, 2.3, 2.4 and 2.5; 2.1, universally calculating basic requirements on a water quality model; 2.2, simulating attributes of the grids; 2.3, designing a hydrodynamic parallel algorithm of the simulation grid; 2.4, designing a water quality simulation parallel algorithm of a simulation grid. According to the simulation method, the water quality can be simulated in real time, and the simulationprecision also reaches an ideal effect.

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.

The invention discloses an urban drainage system simulation control hybrid model based on a Matlab mechanism model, a concept model and a data model. The method comprises the following steps of determining a refined modeling range and a rough modeling range, constructing an online mechanism model, constructing a conceptual model, coupling the online mechanism model and the conceptual model, correcting model parameters, establishing a communication instruction relationship, establishing a rainfall process, simulating the water quantity and the water quality of a drainage system, performing simulation control on the drainage system, data model auxiliary application and simulation result analysis and display. The hybrid model constructed by using the method is a universal simulation control hybrid model of the urban drainage system, fuses an online mechanism model SWMM, a conceptual model and a data model, and can realize rapid simulation, efficient simulation control and automatic strategy optimization of the water quantity and the water quality of the urban drainage system.

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.

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.

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.

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.

The invention discloses a calculation method for simulating river water quality parameters based on an SWMM model, and the method comprises the steps: building a river network model, and setting the transition section form of a river reach; inputting water quantity and water quality parameters into the corresponding modes for fitting; and characterizing the results of the water quantity and the water quality through the characteristics of the mode. According to the invention, the change degree of water quality in different time periods in a river channel can be simulated, and the water qualitysimulation module can be carried out through the synergistic effect of different pollutants; the water quality of inflow rivers in different areas can be simulated, the comprehensive sewage quality of the inflow riverway under the rain-sewage confluence situation can be simulated, and the rainwater quality of the inflow riverway under the rain-sewage diversion situation can also be simulated.