CN113835357A - Method for dynamically coupling water quantity and water quality with drainage pipe network mechanism model - Google Patents
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Abstract
A method for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model comprises the following steps: 1. based on a city water system simulation model, establishing a drainage system model comprising coupling of a non-mechanism model and a mechanism model SWMM; 2. setting the complete path (#. inp) of an SWMM file, the number and the corresponding names of inflow nodes and outflow nodes in the SWMM in an attribute table of the SWMM module, and then connecting the SWMM module with a non-mechanism model part; 3. setting simulation basic data in a municipal water system simulation model and an SWMM file coupled with the municipal water system simulation model, and setting simulation starting time, simulation ending time and hydraulic calculation step length in the municipal water system simulation model; 4. realizing SWMM rule control after coupling; 5. and carrying out dynamic coupling simulation on water quantity and water quality real-time data interaction between the non-mechanism part of the urban water system simulation model and the coupled SWMM module. The invention can realize the rapid modeling and the dynamic simulation of water quantity and water quality of the drainage system to obtain the running state result of the drainage system.
Description
Technical Field
The invention belongs to the technical field of urban drainage, and particularly relates to a method for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model.
Background
The urban water system simulation model is divided into a mechanism model part and a non-mechanism model part according to the characteristics of the drainage system. The mechanism model can simulate hydraulic relations of a drainage pipe network in various states including normal operation, negative pressure operation, overflow and the like, particularly has good simulation advantages when liquid level control and liquid level weir-overturning overflow conditions are involved, the hydraulic transmission part calculates the flow rate and the liquid level of a pipeline in the drainage pipe network by solving the Saint-Vinan equation set, and long simulation time is consumed when a large-range pipe network is simulated due to the complexity of the solution process of the Saint-Vinan equation set. The major municipal drainage system model in the market at the present stage is mainly a mechanism model, such as the SWMM model of the environmental protection agency EPA. And a non-mechanism model of a hydraulic transmission part is simulated by taking the MaskAccu equation as a principle, so that generalization and simulation of a pipe network can be realized more quickly, and the simulation time is shortened.
Most of hydraulic calculation principles of drainage system simulation software in the current market are still to solve a complex Saint-Venn equation set, or a drainage model is constructed by completely using a non-mechanism model principle, and the real-time coupling of a mechanism model and a non-mechanism model in a simulation process is not realized. When the control rule of the drainage facility in the drainage system is simulated, the existing software depends on a rule control module carried by the SWMM, or needs expensive software such as Matlab and the like or programming languages such as Python, C and the like to carry out real-time control and editing in the SWMM simulation process. The former does not realize innovation, and the complexity of the latter increases the requirements on the model engineer and limits the range of use thereof.
Meanwhile, the existing urban drainage system models are all in a single file simulation mode, namely, only one model file can be operated on one model platform interface, and free coupling simulation among the model files cannot be realized.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model.
As conceived above, the technical scheme of the invention is as follows: a method for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model is characterized in that: the method comprises the following steps:
step 1: based on a city water system simulation model, establishing a drainage system model comprising coupling of a non-mechanism model and a mechanism model SWMM;
step 2: setting an SWMM file complete path (#. inp), the number of inflow nodes in the SWMM, the number of outflow nodes and corresponding names in an attribute table of the SWMM module, and then connecting the SWMM module with a non-mechanism model part to complete coupling connection setting;
and step 3: setting simulation basic data in a municipal water system simulation model and an SWMM file coupled with the municipal water system simulation model, setting simulation starting time, simulation ending time and hydraulic calculation step length in the municipal water system simulation model, and performing simulation preparation work on a complete model;
and 4, step 4: inputting a control action on drainage facilities with linked attributes in the SWMM through a rule control input interface of the urban water system simulation model so as to realize the coupled SWMM rule control;
and 5: and clicking simulation operation to perform dynamic coupling simulation of water quantity and water quality real-time data interaction between the non-mechanism part of the urban water system simulation model and the coupled SWMM module.
Further, in the step 1, by dragging the SWMM module to add a mechanism model part and connecting the SWMM module with upstream and downstream non-mechanism model parts, a dynamic connection library SWMM5ex.dll which meets the data access and output requirements of the non-mechanism module of the urban water system simulation model is obtained, dynamic coupling of the non-mechanism model and the SWMM of the mechanism model is realized through the dynamic connection library, flow and pollution load simulation and data transmission of the SWMM module are performed, and the SWMM interface names and introduction of the dynamic connection library are shown in the following table:
further, the input node of the SWMM in step 2 is a node that receives non-mechanism model data as SWMM input data, and the output node of the SWMM is a node that outputs SWMM node result data to the non-mechanism model.
Further, in the step 4, the SWMM rule control can be retained in the SWMM file and is calculated together during simulation of the urban water system simulation model.
Further, when the urban water system simulation model is used for carrying out rule control on the drainage facilities with the linked attributes in the SWMM in the step 4, a simple 'if-then' rule control writing mode is used, the name of the SWMM file where the control object is located is written when the name of the control object is written, and therefore the facilities in the SWMM file can be controlled, and in each calculation step, the urban water system simulation model can carry out simulation result data reading and control rule input on the inp file through a coupling interface.
Compared with the prior art, the invention has the following advantages and positive effects:
1. according to the invention, the SWMM source code is compiled, so that the SWMM model is called through an interface in a dynamic link library mode, and the limitation that the SWMM software can be used for simulating the drainage system model is broken through.
2. The invention couples the SWMM with the non-mechanism model in a module form, and realizes the free combination modeling application of drainage models with different principles.
3. The invention realizes the real-time data interaction and the rule control between the SWMM module and the non-mechanism model, and can realize the data reading and inputting functions of inp files in the SWMM simulation process.
4. The invention can be added with a plurality of SWMM modules, thereby realizing the function of simultaneously simulating a plurality of inp files in one software interface. After the simulation is finished, the simulation results of the set SWMM inflow and outflow points can be read on the software interface. Meanwhile, after the simulation is finished, each SWMM module generates a separate report file and a separate result file under the inp file of the original path, and the SWMM can be used for reading the result of the whole inp file in the simulation process after the configuration setting is modified.
5. The method defines the pollutant name in the urban water system simulation model, which is the same as the pollutant name defined in the SWMM input file, and can realize pollutant data interaction in the same way of water quantity data interaction.
6. The method adds the set action to the SWMM link object in the action statement controlled by the rule of the urban water system simulation model, thereby realizing the rule control of the link object in the SWMM file.
Drawings
FIG. 1 is a schematic flow diagram of the dynamic coupling of water quantity and water quality with SWMM based on a simulation model of a municipal water system;
FIG. 2 is an interface diagram of a SWMM coupling model based on a simulation model of a municipal water system;
FIG. 3 is a diagram of a SWMM module attribute table screenshot in an urban water system simulation model;
FIG. 4 is a screenshot of an inp file corresponding to SWMM1, one of the SWMM modules participating in the coupled simulation;
FIG. 5 is a comparison of coupled SWMM model inflow (a), outflow (b) results read in SWMM and municipal water system simulation models;
FIG. 6 is a comparison of coupled SWMM model inflow (a), outflow pollution load results (b) read in SWMM and municipal water system simulation models;
FIG. 7 is a screenshot of an input interface for rule control of an SWMM module in an urban water system simulation model;
FIG. 8 is a screen shot of the SWMM results for drain orifice flow without a coupled SWMM model alone;
FIG. 9 is a screenshot of the flow results of the SWMM model as a water discharge orifice in the SWMM and the municipal water system simulation model, respectively, when the SWMM module performs coupling simulation in the municipal water system simulation model;
FIG. 10 is a screenshot of the flow results of the drain hole in the SWMM and the municipal water system simulation model respectively when the SWMM model is used as a SWMM module to perform coupling simulation on the municipal water system simulation model and the drain hole is subjected to regular control by the regular control as shown in FIG. 7.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, the invention provides a method for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model, which comprises the following steps:
1. based on a simulation model of the urban water system, a mechanism model part is added by dragging an SWMM module and is connected and communicated with an upstream non-mechanism model part and a downstream non-mechanism model part, a drainage system model comprising the coupling of the non-mechanism model and the mechanism model SWMM is established, as shown in figure 2,
the urban water system simulation model adopts C language to compile a calculation engine, and when compiling the dynamic link library, the C language is used for calling an external available function interface to control program execution simulation operation. When the SWMM module is coupled, the SWMM original code is compiled to form a dynamic link library (swmm5ex.dll) meeting the data access and output requirements of the non-mechanism module of the urban water system simulation model, and the simulation and data transmission of the flow and pollution load of the SWMM module are carried out. The SWMM interface names and introductions for the dynamic link library are shown in the following table:
| interface name | Interface function |
| swmm_setExtInflow | Setting external input flow of SWMM node in simulation process |
| swmm_setExtPollutLoad | Setting SWMM node external pollution load inflow in simulation process |
| swmm_setSetting | Setting SWMM control rule action values in a simulation process |
| swmm_getResult | Obtaining SWMM object simulation results of current calculation period |
| swmm_isNode | Judging whether the node is a node |
| swmm_isLink | Determine whether it is a link |
| swmm_isPollut | Judging whether the pollutant is a pollutant or not |
| swmm_getStartAndEndTime | Obtaining simulation start and end time |
| swmm_getRoutingStep | Obtaining hydraulic calculation step length |
2. The municipal water system simulation model supports multiple SWMM module additions and couplings. When the SWMM module is added, the complete path of the corresponding SWMM input file (·. inp) and the number and corresponding names of the inflow nodes and the outflow nodes in the SWMM are required to be configured. The SWMM inflow node is a node which receives non-mechanism model data as SWMM inflow data, and the SWMM outflow node is a node which outputs SWMM node result data to a non-mechanism model. In this embodiment, through the SWMM module attribute table, as shown in fig. 3, SWMM module attribute editing is performed, including configuring a corresponding SWMM input file complete path (·. inp), inputting the number of inflow and outflow nodes and corresponding names in the SWMM coupled with the non-mechanism model, and completing the coupling connection setting;
3. setting rainfall data, flow and pollution load data simulation basic data in a municipal water system simulation model and an SWMM file coupled with the municipal water system simulation model, setting simulation starting time, simulation ending time and hydraulic calculation step length in the municipal water system simulation model, and performing complete model simulation preparation work;
when the simulation condition is set, the urban water system simulation model automatically updates the simulation start time, the simulation end time and the hydraulic calculation step length in the SWMM file through the coupling interface according to the simulation start time, the simulation end time and the hydraulic calculation step length set in the urban water system simulation model, and the conditions of the complete model are synchronously set;
4. inputting a control action on drainage facilities with linked attributes in the SWMM through a rule control input interface of the urban water system simulation model as shown in FIG. 7 so as to realize the coupled rule control on the SWMM; the rule control of the SWMM can be reserved in an SWMM file, and the rule control of the SWMM can be calculated together when a simulation model of the urban water system is simulated;
when regular control is performed on the drainage facilities linked with the attributes in the SWMM through the urban water system simulation model in the step, a simple 'if-then' regular control writing mode is used. Writing the name of the SWMM file where the control object is located when writing the name of the control object can realize the control of the facilities in the SWMM file, so that the function of writing the control rules of a plurality of SWMM files on the control rule input platform of the urban water system simulation model can be realized. And in each calculation step length, the urban water system simulation model can read the simulation result data and input the control rule to the inp file through the coupling interface.
5. Clicking simulation operation to perform dynamic coupling simulation of water quantity and water quality real-time data interaction between a non-mechanism part of the urban water system simulation model and a coupled SWMM module, wherein in the simulation process, the urban water system simulation model performs data input of a non-mechanism module simulation result to the SWMM module and data input of a SWMM module result to the non-mechanism module by using an external interface coupled with the SWMM in each calculation step length, so that the real-time data interaction between the SWMM module and the non-mechanism module of the urban water system simulation model is realized;
6. after the simulation is finished, the data interaction results of the non-mechanism model and the SWMM model can be read in both the urban water system simulation model and the SWMM. The SWMM module generates a report file (· rpt) and a result file (· out) corresponding to the input file. Due to interaction with a non-mechanism module of a municipal water system simulation model, the result of the file is not consistent with the result of independent simulation of an SWMM input file, but the result file can be read by using SWMM software under the conventional SWMM configuration setting. Fig. 5 and 6 show comparison of the results of inflow, outflow water amount, pollution load of the SWMM file shown in fig. 4 read in the municipal water system simulation model and the SWMM model. Fig. 9 and 10 show the comparison of the effect before and after the SWMM coupling is performed by using the rule control module of the municipal water system simulation model.
The invention can be simultaneously coupled with a plurality of SWMM files on the simulation model of the urban water system for simulation, and flexibly utilizes the mechanism model and the non-mechanism model to simulate the drainage system according to different district characteristics of the drainage system. Meanwhile, the SWMM model coupled into the platform can be controlled by using rule control in the urban water system simulation model, and the control rule of the coupled model can be conveniently combed and adjusted.
Claims (5)
1. A method for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model is characterized in that: the method comprises the following steps:
step 1: based on a city water system simulation model, establishing a drainage system model comprising coupling of a non-mechanism model and a mechanism model SWMM;
step 2: setting an SWMM file complete path (#. inp), the number of inflow nodes in the SWMM, the number of outflow nodes and corresponding names in an attribute table of the SWMM module, and then connecting the SWMM module with a non-mechanism model part to complete coupling connection setting;
and step 3: setting simulation basic data in a municipal water system simulation model and an SWMM file coupled with the municipal water system simulation model, setting simulation starting time, simulation ending time and hydraulic calculation step length in the municipal water system simulation model, and performing simulation preparation work on a complete model;
and 4, step 4: inputting a control action on drainage facilities with linked attributes in the SWMM through a rule control input interface of the urban water system simulation model so as to realize the coupled SWMM rule control;
and 5: and clicking simulation operation to perform dynamic coupling simulation of water quantity and water quality real-time data interaction between the non-mechanism part of the urban water system simulation model and the coupled SWMM module.
2. The method of claim 1 for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model, wherein the method comprises the following steps: in the step 1, a mechanism model part is added by dragging the SWMM module, and the SWMM module is connected and communicated with an upstream non-mechanism model part and a downstream non-mechanism model part to obtain a dynamic link library swmm5ex.dll which meets the data access and output requirements of the non-mechanism module of the urban water system simulation model, the dynamic coupling of the non-mechanism model and the SWMM of the mechanism model is realized through the dynamic link library, the flow and pollution load of the SWMM module are simulated and transmitted, and the SWMM interface names and introduction of the dynamic link library are shown in the following table:
3. the method of claim 1 for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model, wherein the method comprises the following steps: in the step 2, the SWMM inflow node is a node that receives non-mechanism model data as SWMM inflow data, and the SWMM outflow node is a node that outputs SWMM node result data to the non-mechanism model.
4. The method of claim 1 for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model, wherein the method comprises the following steps: in the step 4, the SWMM rule control can be reserved in the SWMM file and is calculated together when the simulation model of the urban water system is simulated.
5. The method of claim 1 for dynamically coupling water quantity and water quality with a drainage pipe network mechanism model, wherein the method comprises the following steps: in the step 4, when the urban water system simulation model is used for carrying out rule control on the drainage facilities with the linked attributes in the SWMM, a simple 'if-then' rule control writing mode is used, and the name of the SWMM file where the control object is located is written when the name of the control object is written, so that the facilities in the SWMM file can be controlled, and in each calculation step, the urban water system simulation model can carry out simulation result data reading and control rule input on the inp file through a coupling interface.
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