CN113901626B - Sludge deposition visual simulation method and system for drainage pipe network - Google Patents

Sludge deposition visual simulation method and system for drainage pipe network Download PDF

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CN113901626B
CN113901626B CN202111504837.6A CN202111504837A CN113901626B CN 113901626 B CN113901626 B CN 113901626B CN 202111504837 A CN202111504837 A CN 202111504837A CN 113901626 B CN113901626 B CN 113901626B
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杨思原
王宣
包申旭
山梦杰
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Wuhan University of Technology WUT
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Abstract

The invention provides a visual simulation system and method for sludge deposition of a drainage pipe network, which are realized by a sludge deposition module, wherein the sludge deposition module comprises a data layer, a service layer and a UI layer; the service layer is respectively connected with the data layer and the service layer; the service layer is connected with the UI layer at the same time; the data layer is used for storing pipe network shp data and SWMM model data of the drainage pipe network; the service layer is used for calculating according to the pipe network shp data and the SWMM model data and sending a calculation result to the service layer; the service layer is used for realizing pipe network data and state management according to the settlement result and sending the management result data to the UI layer; and the UI layer is used for realizing visualization of sludge deposition of the pipe network according to the management result data. According to the method, the sludge sedimentation condition of a single pipeline is expanded to an integral pipe network in a topological relation by a recursion method according to the change conditions of suspended particulate matter concentration (SS) and sedimentation amount along with time, and the sludge sedimentation condition of the drainage pipe network is represented by setting a sedimentation threshold value of the drainage pipe network and combining visualization rendering.

Description

Sludge deposition visual simulation method and system for drainage pipe network
Technical Field
The invention relates to the technical field of municipal engineering, in particular to a method and a system for visually simulating sludge deposition of a drainage pipe network.
Background
The urbanization process of China is accelerated continuously, the urban scale is expanded continuously, and the urban development speed is rapid. In the process, each large city shows different urban problems, wherein urban flood disasters occur in the cities and are continuously generated every year, and the urban flood disasters seriously hinder the healthy development of the cities and influence the normal production and life of people. The urban infrastructure directly related to urban inland inundation disasters is a drainage pipe network, and in the process of rapid development of urban economy, the development of the drainage pipe network is delayed seriously, and the timing dredging work is indispensable.
The SWMM is a dynamic rainfall-runoff simulation model, is used for simulating a single rainfall event or long-term water quantity and water quality simulation of a city, can provide flow data of a drainage pipe network, and is different from the actual condition because a water quality module simply calculates pollutant components through a self-defined degradation function. Because the research on the sediment settlement of the drainage pipe network is less at present, the research on the settlement and transportation rules of the solid suspended particles in the pipeline is not comprehensive enough, and a simulation method or a simulation system capable of accurately simulating and predicting the settlement and the change of the solid suspended particles in the pipeline of the urban pipe network does not exist.
Disclosure of Invention
In view of the above, the invention provides a method and a system for visualization simulation of sludge deposition in a drainage pipe network.
A visual simulation system for sludge deposition of a drainage pipe network is realized by a sludge deposition module, wherein the sludge deposition module comprises a data layer, a service layer and a UI layer;
the service layer is respectively connected with the data layer and the service layer; the service layer is connected with the UI layer at the same time;
the data layer is used for storing pipe network shp data and SWMM model data of the drainage pipe network;
the service layer is used for calculating according to the pipe network shp data and the SWMM model data and sending a calculation result to the service layer;
the service layer is used for realizing pipe network data management and pipe network state management according to the settlement result and sending the management result data to the UI layer;
and the UI layer is used for realizing visualization of sludge deposition of the pipe network according to the management result data.
In the visual simulation system for sludge deposition of the drainage pipe network,
the pipe network shp data of the drainage pipe network form a whole pipe network path by searching pipe network data parameters from the downstream end of the urban pipe network to the upstream, and the pipe network is gradually combed from the pipe network source to the downstream until reaching the pipe network source, and the whole pipe network path is combed out through each pipe network node to obtain the pipe network shp data.
In the visual simulation system for sludge deposition of the drainage pipe network,
the SWMM model data provides water quality and water quantity data of the drainage pipe network for the pipe network sludge deposition module, wherein the water quality and water quantity data comprise flow, water depth, flow velocity, water quantity, fullness and pollutant concentration data.
In the visual simulation system for sludge deposition of the drainage pipe network,
the pipe network data management comprises the steps of realizing the zooming, dragging and selection of pipe network data output by the SWMM model;
and the management of the pipe network state comprises monitoring the sludge deposition amount of each pipe network when the module operates and judging whether the sludge transportation of each pipe network is smooth or not.
In the visual simulation system for sludge deposition of the drainage pipe network,
the UI layer is used for realizing visualization of sludge deposition of the pipe network according to the management result data and comprises the following steps: the visual display comprises the display of a pipe network attribute table, the color setting of different pipe network deposition sludge deposition amounts and the display of a pipe network sludge deposition amount statistical chart.
In the visual simulation system for sludge deposition of the drainage pipe network, the calculation of the service layer according to the pipe network shp data and the SWMM model data comprises the following steps:
and obtaining the sludge concentration of the upstream drainage well of any pipe network and the suspended particulate matter concentration SS of the inlet and the outlet of a single pipeline of the downstream drainage well according to the pipe network shp data and the data output by the SWMM model, and calculating the sludge deposition rate by using a semi-empirical model formula so as to calculate the sludge deposition amount.
In the visual simulation system for sludge deposition of the drainage pipe network,
obtaining the sludge concentration of an upstream drainage well and the SS of a downstream drainage well of any pipe network according to pipe network shp data and SWMM output data, and calculating the sludge deposition rate through a semi-empirical model formula, so that the calculation of the sludge deposition amount comprises the following steps:
and calculating the SS of the inlet and the outlet of the single pipeline by combining the SWMM model output pipe network data and applying a semi-empirical model formula as follows:
Cmin＝ηminρmρs(ρs-ρm)-1UJ/w
Cmax＝ηmaxρmρs(ρs-ρm)-1UJ/w
wherein C isminRepresents the pipeline SS concentration lower limit; cmaxRepresents the pipeline SS concentration upper limit;ηmin、ηmaxrepresenting an efficiency coefficient, the size of which is determined by the condition of the calculation area; w represents the particle settling velocity; rhomRepresents the sewage density; rhosRepresents the particle density; u represents the sewage flow rate; j represents the gradient of the pipe network;
constructing a pipe network deposition amount calculation model according to the flow of the pipeline and the inlet and outlet concentration of the pipeline, wherein the pipe network deposition amount calculation model has the following formula:
Figure GDA0003472810790000031
wherein M is the pollutant deposition amount of the pipeline in a time period T(s), Q is the water amount in the time period T, and CinAnd CoutRespectively the concentrations of pollutants at the inlet and the outlet of the pipeline, and rho is the density of the sediment.
The invention also provides a visual simulation method for sludge deposition of a drainage pipe network, which is realized by any one of the systems and comprises the following steps:
s1, searching pipe network data parameters from the downstream end of the urban pipe network to the upstream to form the whole pipe network path until the pipe network source, gradually carding the pipe network from the pipe network source to the downstream, and carding the whole pipe network path through each pipe network node;
s2, inputting the data of water quality and water quantity of the drainage pipe network, including the data of flow, water depth, flow velocity, water quantity, fullness and pollutant concentration into an SWMM model;
s3, after the SWMM model outputs data to the sludge deposition module, the sludge deposition module operates, the pollutant concentrations of the nodes at the two ends of the pipeline are calculated by combining the pollutant concentrations of the inlets of the pipe networks and the parameters output by the SWMM model, and the pollutant concentrations of the nodes at the two ends of the pipeline are calculated by combining a semi-empirical model formula according to the pollutant concentrations and the parameters;
and S4, displaying the pollutant deposition condition of the sludge in the drainage pipe network in a visual mode.
The beneficial technical effects are as follows: compared with the prior art, the method and the system for visualization simulation of sludge deposition of the drainage pipe network have the advantages that the change conditions of suspended particulate matter concentration (SS) and deposition amount of an inlet and an outlet of a single pipeline along with time are obtained through a simulation formula, the sludge deposition condition of the single pipeline is expanded to the integral pipe network in a topological relation by adopting a recursive traceability method, and the sludge deposition condition of the drainage pipe network is represented by setting a deposition threshold value of the drainage pipe network and combining visualization rendering. The sludge deposition visualization simulation method formed by the invention is simple and clear, the formed system is easy to operate, the deposition condition of the sludge in the drainage pipe network can be predicted, a reference basis is provided for dredging work of the drainage pipe network, and the method has important significance for construction and maintenance of municipal engineering.
Drawings
FIG. 1 is a block diagram of a visualization simulation system for sludge deposition in a drainage pipe network according to an embodiment of the present invention;
FIG. 2 is a route diagram of a visualization simulation technology for sludge deposition in a drainage pipe network according to an embodiment of the invention;
fig. 3 is a schematic view of a single pipe inlet and outlet SS.
Detailed Description
As shown in fig. 1, in an embodiment of the present invention, an embodiment of the present application discloses a drain pipe network sludge deposition visualization simulation system, which is implemented by a sludge deposition module, where the sludge deposition module includes a data layer, a service layer, a business layer, and a UI layer;
the service layer is respectively connected with the data layer and the service layer; the service layer is connected with the UI layer at the same time;
the data layer is used for storing pipe network shp data and SWMM model data of the drainage pipe network;
the service layer is used for calculating according to the pipe network shp data and the SWMM model data and sending a calculation result to the service layer;
the service layer is used for realizing pipe network data management and pipe network state management according to the settlement result and sending the management result data to the UI layer;
and the UI layer is used for realizing visualization of sludge deposition of the pipe network according to the management result data.
In the drainage pipe network sludge deposition visualization simulation system, pipe network shp data of the drainage pipe network form the whole pipe network path by searching pipe network data parameters from the downstream end of a city pipe network to the upstream, and then gradually carding the pipe network from the pipe network source to the downstream, and obtaining the whole pipe network shp data by carding the whole pipe network path through each pipe network node. The system can be connected with a development platform C #, an SWMM data platform and a GIS platform to acquire the pipe network shp data. The shp data is shape file data. The GIS platform is ArcGIS, can perform all functions of data browsing, processing, analyzing and editing, and is added with advanced geographic processing and data conversion functions. The operating system can be Windows 10, the development tool adopts Visual Studio2012+ ArcEngine, and the input data adopts text files.
In the visual simulation system for sludge deposition of the drainage pipe network, the SWMM model data provides drainage pipe network water quality and water quantity data including flow, water depth, flow velocity, water quantity, fullness and pollutant concentration data for the pipe network sludge deposition module.
In the drainage pipe network sludge deposition visualization simulation system, the pipe network data management comprises the steps of realizing the scaling, dragging and selection of pipe network data output by an SWMM model;
and the management of the pipe network state comprises monitoring the sludge deposition amount of each pipe network when the module operates and judging whether the sludge transportation of each pipe network is smooth or not.
In the visual simulation system for sludge deposition of the drainage pipe network,
the UI layer is used for realizing visualization of sludge deposition of the pipe network according to the management result data and comprises the following steps: the visual display comprises the display of a pipe network attribute table, the color setting of different pipe network deposition sludge deposition amounts and the display of a pipe network sludge deposition amount statistical chart.
In the visual simulation system for sludge deposition of the drainage pipe network, the calculation of the service layer according to the pipe network shp data and the SWMM model data comprises the following steps:
and obtaining the sludge concentration of the upstream drainage well and the SS of the downstream drainage well of any pipe network according to the pipe network shp data and the data output by the SWMM model, and calculating the sludge deposition rate by using a semi-empirical model formula so as to calculate the sludge deposition amount. SS refers to the concentration of suspended particles at the inlet and outlet of a single pipeline.
The method is a recursion tracing method, which is a reverse thinking mode for tracing the root cause and is a working mode for tracing the reason in a backward mode to solve the problem. The topological relation calculation logic is to search pipe network data parameters from the downstream end of the urban pipe network to the upstream end to form the whole pipe network path to the source of the pipe network. And then gradually combing the pipe networks from the source of the pipe network to the downstream, combining SWMM output rainfall data through each pipe network node to obtain the sludge concentration of the upstream drainage well and the SS of the downstream drainage well of any pipe network, and calculating the sludge deposition rate through a semi-empirical model formula so as to calculate the sludge deposition amount. Because the concentration change of each pipe network connecting well can be obtained by a tracing method, the influence of the concentration change caused by pipe network confluence on the result can be effectively solved.
In the visual simulation system for sludge deposition of the drainage pipe network,
obtaining the sludge concentration of an upstream drainage well of any pipe network and the suspended particulate matter concentration SS of an inlet and an outlet of a single pipeline of a downstream drainage well according to pipe network shp data and SWMM output data, and calculating the sludge deposition rate through a semi-empirical model formula, so that the sludge deposition amount calculation comprises the following steps:
and calculating the SS of the inlet and the outlet of the single pipeline by combining the SWMM model output pipe network data and applying a semi-empirical model formula as follows:
Cmin＝ηxinρmρs(ρs-ρm)-1UJ/w
Cmax＝ηmaxρmρs(ρs-ρm)-1UJ/w
wherein C isminRepresents the lower pipeline SS concentration limit (g/L); cmaxRepresents the pipeline SS concentration upper limit (g/L); etamin、ηmaxRepresenting an efficiency coefficient, the size of which is determined by the condition of the calculation area; w represents a particle settling velocity (m/s); rhomRepresents the sewage density (kg/m 3); rhosDenotes the particle density (kg/m 3); u representsSewage flow rate (m/s); j represents the gradient (m/m) of the pipe network;
constructing a pipe network deposition amount calculation model according to the flow of the pipeline and the inlet and outlet concentration of the pipeline, wherein the pipe network deposition amount calculation model has the following formula:
Figure GDA0003472810790000061
wherein M is the pollutant deposition amount of the pipeline in a time period T(s), Q is the water amount in the time period T, and CinAnd CoutRespectively the concentrations of pollutants at the inlet and the outlet of the pipeline, and rho is the density of the sediment.
The invention also provides a visual simulation method for sludge deposition of a drainage pipe network, which is realized by any one of the systems and comprises the following steps:
s1, searching pipe network data parameters from the downstream end of the urban pipe network to the upstream to form the whole pipe network path until the pipe network source, gradually carding the pipe network from the pipe network source to the downstream, and carding the whole pipe network path through each pipe network node;
s2, inputting the data of water quality and water quantity of the drainage pipe network, including the data of flow, water depth, flow velocity, water quantity, fullness and pollutant concentration into an SWMM model;
s3, after the SWMM model outputs data to the sludge deposition module, the sludge deposition module operates, the pollutant concentrations of the nodes at the two ends of the pipeline are calculated by combining the pollutant concentrations of the inlets of the pipe networks and the parameters output by the SWMM model, and the pollutant concentrations of the nodes at the two ends of the pipeline are calculated by combining a semi-empirical model formula according to the pollutant concentrations and the parameters;
and S4, displaying the pollutant deposition condition of the sludge in the drainage pipe network in a visual mode.
The beneficial technical effects are as follows: compared with the prior art, the method and the system for visualization simulation of sludge deposition of the drainage pipe network have the advantages that the change conditions of suspended particulate matter concentration (SS) and deposition amount of an inlet and an outlet of a single pipeline along with time are obtained through a simulation formula, the sludge deposition condition of the single pipeline is expanded to the integral pipe network in a topological relation by adopting a recursive traceability method, and the sludge deposition condition of the drainage pipe network is represented by setting a deposition threshold value of the drainage pipe network and combining visualization rendering. The sludge deposition visualization simulation method formed by the invention is simple and clear, the formed system is easy to operate, the deposition condition of the sludge in the drainage pipe network can be predicted, a reference basis is provided for dredging work of the drainage pipe network, and the method has important significance for construction and maintenance of municipal engineering.
The principle of the embodiment of the present invention is further explained below with reference to fig. 1 to 3.
The method and the system for the visual simulation of the sludge deposition of the drainage pipe network comprise an operation platform system; the method comprises a single pipeline inlet and outlet SS calculation method; comprises a sewer pipe network convergence area SS recursion source tracing method.
Referring to fig. 1, in the visualized simulation system for sludge deposition of a drainage pipe network, a pipe network sludge deposition module is provided with a data layer, the data layer is connected with a service layer, the service layer is connected with a service layer, and the service layer is connected with a UI layer.
The operating platform system is a Microsoft Windows series operating system, the GIS platform is ArcGIS, all functions of data browsing, processing, analyzing and editing can be performed, and high-level geographic processing and data conversion functions are added. The data layer comprises pipe network shp data and SWMM output data. Real rainfall data of the sewer pipeline is provided for the pipe network sludge deposition module, and the rainfall data comprises data such as flow, water depth, flow velocity, water quantity, fullness, pollutant concentration and the like of the whole drainage pipe network. The service layer includes module build, computing services, and visualization services. The module construction is that C # language and form are adopted for system development, an operating system is Windows 10, a development tool adopts Visual Studio2012+ ArcEngine, and input data adopts text files. The calculation service is that the sludge deposition module processes data such as flow, water depth, flow velocity, water quantity, fullness and pollutant concentration of the SWMM output drainage pipe network, and the visualization service comprises pipe network attribute table display, pipe network deposition sludge deposition amount different respective coloring and pipe network sludge deposition amount statistical chart display for visualization display.
In the visual simulation method and system for sludge deposition of the drainage pipe network, the service layer comprises pipe network data management, pipe network deposition amount, pollutant concentration calculation and pipe network state monitoring, and the service layer is realized in the sludge deposition module. And the pipe network data management is to realize the zooming, dragging and selection of the pipe network data output by the SWMM. The pipe network state monitoring is used for monitoring the sludge deposition amount of each pipe network when the module operates and judging whether the sludge transportation of each pipe network is smooth or not. The UI layer comprises a PC end application program. The PC end application program is the sludge deposition module and is presented in the form of an application program.
Preferably, the calculation method of the SS of the single pipeline inlet and outlet is to use a semi-empirical model formula to calculate by combining with SWMM output pipe network data. The formula of the semi-empirical model is as follows:
Cmin＝ηminρmρs(ρs-ρm)-1UJ/w
Cmax＝ηmaxρmρs(ρs-ρm)-1UJ/w
wherein C isminRepresents the lower pipeline SS concentration limit (g/L); cmaxRepresents the pipeline SS concentration upper limit (g/L); etamin、ηmaxRepresenting an efficiency coefficient, the size of which is determined by the condition of the calculation area; w represents a particle settling velocity (m/s); rhomRepresents the sewage density (kg/m 3); rhosDenotes the particle density (kg/m 3); u represents a sewage flow rate (m/s); j represents the pipe network gradient (m/m).
When the inflow particulate matter concentration is larger than CmaxThe particles will settle until the concentration equals Cmax(ii) a When the inflow particulate matter concentration is less than CminThe sludge in the pipe network can be flushed until the concentration of the particulate matters in the sewage is equal to Cmin(ii) a When the inflow particulate matter concentration is between CmaxAnd CminIn between, the particulate matter neither settles nor is washed away.
1) When C is presentin≥CmaxAt this point, it settles, at this point Cout＝Cmax；
2) When C is presentmin＜Cin＜CmaxHerein, thisIs not washed and does not settle, and at this time Cout＝Cin。
3) When C is presentin＜CminAt this point, a flush occurs, at this point Cout＝Cmin。
4) In the above formula CinAs inlet contaminant concentration, CoutIs the outlet contaminant concentration.
The pipe network deposition calculation model is mainly constructed according to the flow of the pipeline and the inlet and outlet concentration of the pipeline, and the formula is as follows:
Figure GDA0003472810790000091
wherein M is the pollutant deposition amount of the pipeline in a time period T(s), Q is the water amount in the time period T, and rho is the density of the sediment.
The method is a recursion tracing method, which is a reverse thinking mode for tracing the root cause and is a working mode for tracing the cause in a backward mode to solve the problem. And searching pipe network data parameters from the downstream end of the urban pipe network to the upstream so as to form the whole pipe network path until reaching the source of the pipe network. And then gradually combing the pipe networks from the source of the pipe network to the downstream, combining SWMM output rainfall data through each pipe network node to obtain the sludge concentration of the upstream drainage well and the SS of the downstream drainage well of any pipe network, and calculating the sludge deposition rate through a semi-empirical model formula so as to calculate the sludge deposition amount. Because the concentration change of each pipe network connecting well can be obtained by a tracing method, the influence of the concentration change caused by pipe network confluence on the result can be effectively solved.
The judgment mechanism of the sedimentation threshold value of the drainage pipe network is a mechanism established according to the actual municipal pipe network dredging standard, namely, dredging is started when the sludge sedimentation height reaches 1/6-1/3 of the pipe network height, and the dredging standard is required when the sludge sedimentation height reaches 1/3 of the pipe network height. The visual rendering is to calibrate different colors of pipe networks with different sludge sedimentation heights in the operating system through visual services according to a threshold judgment mechanism, such as: the height of the pipe network sediment is below 1/6, the pipe network sediment is green, yellow when the height is 1/6-1/3, and red when the height is 1/3.
The method and the system for visualization simulation of sludge deposition of the drainage pipe network comprise the following technical routes:
combing the pipe network by a recursive traceability method: and searching pipe network data parameters from the downstream end of the urban pipe network to the upstream so as to form the whole pipe network path until reaching the source of the pipe network. And then gradually combing the pipe network from the source of the pipe network to the downstream, and combing the whole pipe network path through each pipe network node.
SWMM input data: the SWMM provides water quality and water quantity data of the drainage pipe network for the pipe network sludge deposition module, wherein the data comprise flow, water depth, flow velocity, water quantity, fullness, pollutant concentration and the like. And inputting the SWMM output data into the sludge deposition module to lay a foundation for the operation of the sludge deposition module.
The sludge deposition module operates: and after the SWMM output data is input into the sludge deposition module, the sludge deposition module operates, rainfall data is output by combining with the SWMM, such as the concentration of each pipe network inlet and each parameter, the concentration of the nodes at two ends of the pipeline is calculated by combining the pollutant concentration and each parameter with a semi-empirical model formula, and the deposition condition of the sludge in the drainage pipe network is displayed through a PC end application program window.
The sludge deposition module outputs data: along with the operation of the sludge deposition module, the deposition amount of sludge in the pipe network is more and more, and certain pipe networks are changed from green to red in color, which shows that the deposition amount of the sludge in the pipe network is more, the sludge deposition in the pipe network reaches the load, and the sludge needs to be cleaned in time. When the sludge deposition module finishes running, clicking a certain pipe network in the module to generate output data of the pipe network, wherein in the statistical chart, the horizontal coordinate (black) represents a time node; the blue curve and the yellow curve respectively represent the dynamic change process of the concentration of the upstream inlet well and the downstream outlet well of the pipeline along with time, and correspond to a left coordinate axis (green) and have the unit of gram/liter; the red curve represents the dynamic course over time of the proportion of the volume of deposited contaminants in the pipe to the capacity of the pipe, in percentages (this statistical diagram is not shown).
And (3) urban pipe network state monitoring: the urban pipe network state is detected by outputting data through the sludge deposition module, and when the color of the pipe network in the sludge deposition module is changed from green to red, the position of the pipe network and the sludge deposition data of the related pipe network are recorded in time. Recording areas which are easy to block and flood disasters, and providing basis for dredging work of relevant departments of urban dredging.
The invention has stable and reliable performance, clear and flexible module thought, strong operability, convenient input and output, expandability, high safety and strong practicability. The invention relates to a visual simulation method and a visual simulation system for sludge deposition of a drainage pipe network.
The embodiments of the present invention are not limited to the specific implementation, and it is obvious to those skilled in the art that other various changes and modifications can be made according to the technical idea of the present invention, and all such changes and modifications should fall within the protection scope of the claims of the present invention.

Claims (6)

1. A visual simulation system for sludge deposition of a drainage pipe network is characterized in that the system is realized by a sludge deposition module, and the sludge deposition module comprises a data layer, a service layer and a UI layer;
the service layer is respectively connected with the data layer and the service layer; the service layer is connected with the UI layer at the same time;
the data layer is used for storing pipe network shp data and SWMM model data of the drainage pipe network;
the service layer is used for calculating according to the pipe network shp data and the SWMM model data and sending a calculation result to the service layer;
the service layer is used for realizing pipe network data management and pipe network state management according to the settlement result and sending the management result data to the UI layer;
the UI layer is used for realizing visualization of sludge deposition of the pipe network according to the management result data;
the service layer is used for calculating according to the pipe network shp data and the SWMM model data and comprises the following steps:
obtaining the sludge concentration of an upstream drainage well of any pipe network and the suspended particulate matter concentration SS of an inlet and an outlet of a single pipeline of a downstream drainage well according to the pipe network shp data and the data output by the SWMM model, and calculating the sludge deposition rate through a semi-empirical model formula so as to calculate the sludge deposition amount;
obtaining the sludge concentration of an upstream drainage well and the SS of a downstream drainage well of any pipe network according to pipe network shp data and SWMM output data, and calculating the sludge deposition rate through a semi-empirical model formula, so that the calculation of the sludge deposition amount comprises the following steps:
combining with SWMM model output pipe network data, calculating the SS of the inlet and the outlet of a single pipeline by using a semi-empirical model formula, wherein the semi-empirical model formula is as follows:
Cmin＝ηminρmρs(ρs-ρm)-1UJ/w
Cmax＝ηmaxρmρs(ρs-ρm)-1UJ/w
wherein C isminRepresents the pipeline SS concentration lower limit; cmaxRepresents the pipeline SS concentration upper limit; etamin、ηmaxRepresenting an efficiency coefficient, the size of which is determined by the condition of the calculation area; w represents the particle settling velocity; rhomRepresents the sewage density; rhosRepresents the particle density; u represents the sewage flow rate; j represents the gradient of the pipe network;
constructing a pipe network deposition amount calculation model according to the flow of the pipeline and the inlet and outlet concentration of the pipeline, wherein the pipe network deposition amount calculation model has the following formula:
Figure FDA0003472810780000021
wherein M is the pollutant deposition amount of the pipeline in a time period T(s), Q is the water amount in the time period T, and CinAnd CoutRespectively the inlet and outlet contaminant concentrations, rho, of the pipelineIs the density of the deposit.
2. The drain pipe network sludge deposition visualization simulation system of claim 1,
the pipe network shp data of the drainage pipe network form a whole pipe network path by searching pipe network data parameters from the downstream end of the urban pipe network to the upstream, and the pipe network is gradually combed from the pipe network source to the downstream until reaching the pipe network source, and the whole pipe network path is combed out through each pipe network node to obtain the pipe network shp data.
3. The drain pipe network sludge deposition visualization simulation system of claim 1,
the SWMM model data provides water quality and water quantity data of the drainage pipe network for the pipe network sludge deposition module, wherein the water quality and water quantity data comprise flow, water depth, flow velocity, water quantity, fullness and pollutant concentration data.
4. The drain pipe network sludge deposition visualization simulation system of claim 1,
the pipe network data management comprises the steps of realizing the zooming, dragging and selection of pipe network data output by the SWMM model;
and the management of the pipe network state comprises monitoring the sludge deposition amount of each pipe network when the module operates and judging whether the sludge transportation of each pipe network is smooth or not.
5. The drain pipe network sludge deposition visualization simulation system of claim 1,
the UI layer is used for realizing visualization of sludge deposition of the pipe network according to the management result data and comprises the following steps: the visual display comprises the display of a pipe network attribute table, the color setting of different pipe network deposition sludge deposition amounts and the display of a pipe network sludge deposition amount statistical chart.
6. A visualization simulation method for sludge deposition of a drainage pipe network, which is realized by the system of any one of claims 1 to 5, and comprises the following steps:
s1, searching pipe network data parameters from the downstream end of the urban pipe network to the upstream to form the whole pipe network path until the pipe network source, gradually carding the pipe network from the pipe network source to the downstream, and carding the whole pipe network path through each pipe network node;
s2, inputting the data of water quality and water quantity of the drainage pipe network, including the data of flow, water depth, flow velocity, water quantity, fullness and pollutant concentration into an SWMM model;
s3, after the SWMM model outputs data to the sludge deposition module, the sludge deposition module operates, the pollutant concentrations of the nodes at the two ends of the pipeline are calculated by combining the pollutant concentrations of the inlets of the pipe networks and the parameters output by the SWMM model, and the pollutant concentrations of the nodes at the two ends of the pipeline are calculated by combining a semi-empirical model formula according to the pollutant concentrations and the parameters;
and S4, displaying the pollutant deposition condition of the sludge in the drainage pipe network in a visual mode.
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