CN115455723A - Rainwater system fixed runoff coefficient modeling method based on SWMM model - Google Patents
Rainwater system fixed runoff coefficient modeling method based on SWMM model Download PDFInfo
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Abstract
The embodiment of the application provides a modeling method for a fixed runoff coefficient of a drainage system based on an SWMM model, which comprises the steps of selecting a simulation area, wherein the simulation area comprises a plurality of sub-drainage areas, the interior of each sub-drainage area is further subdivided into a plurality of sub-subareas by SWMM software according to hydrological characteristics, and each sub subarea comprises a permeable area A1, a non-permeable area A2 containing a hollow and a non-permeable area A3 containing no hollow; the parameters of each sub-drainage area are set according to the following rules: setting evaporation intensity as 0, no snow melting, setting the proportion of A2 and A3 as the comprehensive runoff coefficient of a simulation area, setting the proportion of A3 as 100%, setting the depression water storage depth of A1 and A2 as 0, setting the infiltration mode of A1 as a Horton mode, setting the maximum infiltration rate and the minimum infiltration rate as equal and larger than the peak intensity of the simulated rainfall time, setting the Manning coefficient of A1-A3 as 0, and setting runoff calculation options between the maximum infiltration rate and the minimum infiltration rate as OUTLET and the water OUTLET as an inspection well or a discharge port; triggering the SWMM software to enter an operation mode, and completing the modeling of the fixed runoff coefficient of the drainage system.
Description
Technical Field
The application relates to the technical field of urban management, in particular to a modeling method for a fixed runoff coefficient of a drainage system based on an SWMM model.
Background
The mathematical modeling of the rainwater drainage system generally adopts professional software for simulation analysis, and the software which is applied more at present in China comprises SWMM, infoWorks, MIKE FLOOD, PCWMM, HYSWMM, digital Water, USRAMS and the like. The SWMM (rainfall flood management model) is early in research and development, good in universality, strong in openness and free to use, and is used or referred in software appearing later. In addition, at present, the drainage engineering planning and design work in China mostly adopts a reasoning formula method, and particularly, hydraulic calculation is carried out on the basis of a given runoff coefficient, namely, the runoff coefficient is an input condition rather than an output result. However, the SWMM software calculates the runoff of the plot by a deduction method, wherein the runoff is equal to the sum of rainfall and snow melting in the range of the plot minus the allowance of losses such as evaporation, infiltration and pit accumulation, and the runoff coefficient is an output result and is not an input condition in the SWMM software. In conclusion, the SWMM software cannot directly model the fixed runoff coefficient, and the problem of low adaptation degree exists.
Disclosure of Invention
The embodiment of the application aims to provide a modeling method for the fixed runoff coefficient of a drainage system based on an SWMM model, and the application suitability can be improved.
The embodiment of the application also provides a modeling method for the fixed runoff coefficient of the drainage system based on the SWMM model, which comprises the following steps:
s1, selecting a simulation area based on basic data reflecting basic conditions of a rainwater pipeline and a drainage area, wherein the simulation area comprises a plurality of sub-drainage areas, the interior of each sub-drainage area is further subdivided into a plurality of sub-subareas by SWMM software according to hydrological characteristics, and the sub-subareas comprise a permeable area A1, a non-permeable area A2 containing pits and a non-permeable area A3 containing no pits;
s2, setting parameters of each sub-drainage area according to the following rules: setting evaporation intensity as 0, no snow melt, ratio of A2 and A3 as comprehensive runoff coefficient of a simulation area, ratio of A3 as 100%, depression water storage depth of A1 and A2 as 0, infiltration mode of A1 as Horton mode, maximum and minimum infiltration rates equal to each other and greater than peak intensity of simulated rainfall time, manning coefficient of A1-A3 as 0, runoff calculation option between each other as OUTLET, water OUTLET as inspection well or discharge port;
and S3, triggering the SWMM software to enter an operation mode, and completing the modeling of the fixed runoff coefficient of the drainage system.
In a second aspect, an embodiment of the present application further provides a system for modeling a fixed runoff coefficient of a drainage system based on an SWMM model, where the system includes a simulation region selection module, a parameter setting module, and a modeling module, where:
the simulation area selection module is used for selecting a simulation area based on basic data reflecting basic conditions of a rainwater pipeline and a drainage area, the simulation area comprises a plurality of sub-drainage areas, the interior of each sub-drainage area is further subdivided into a plurality of sub-areas according to hydrological characteristics by SWMM software, and the sub-areas comprise a permeable area A1, a non-permeable area A2 containing hollow and a non-permeable area A3 containing no hollow;
the parameter setting module is used for setting parameters of the sub-drainage areas according to the following rules: setting evaporation intensity as 0, no snow melt, ratio of A2 and A3 as comprehensive runoff coefficient of a simulation area, ratio of A3 as 100%, depression water storage depth of A1 and A2 as 0, infiltration mode of A1 as Horton mode, maximum and minimum infiltration rates equal to each other and greater than peak intensity of simulated rainfall time, manning coefficient of A1-A3 as 0, runoff calculation option between each other as OUTLET, water OUTLET as inspection well or discharge port;
and the modeling module is used for triggering the SWMM software to enter an operation mode to complete the modeling of the fixed runoff coefficient of the drainage system.
In a third aspect, an embodiment of the present application further provides a readable storage medium, where the readable storage medium includes a program of a SWMM model-based fixed runoff coefficient modeling method for a drainage system, and when the program of the SWMM model-based fixed runoff coefficient modeling method is executed by a processor, the method implements any one of the steps of the SWMM model-based fixed runoff coefficient modeling method for the drainage system.
From the above, the fixed runoff coefficient modeling method, the fixed runoff coefficient modeling system and the readable storage medium of the drainage system based on the SWMM model provided by the embodiment of the application are combined with the SWMM model to perform fixed runoff coefficient method modeling, and in the modeling process, the composition of sub-zones in the drainage area and the reasonable setting of parameters of the drainage area are combined, so that the defect that the SWMM cannot directly perform fixed runoff coefficient modeling is overcome while the engineering practice is approached, and the application suitability is improved.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
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In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a flowchart of a modeling method for fixed runoff coefficients of a drainage system based on an SWMM model according to an embodiment of the present application;
FIG. 2 is a schematic view of a production manifold;
fig. 3 is a network diagram of a case zone SWMM model;
FIG. 4 is a schematic view of a sub-drainage area non-linear reservoir model;
fig. 5 is a runoff plot of the S140 sub-drainage area at P =1 year;
fig. 6 is a schematic structural diagram of a fixed runoff coefficient modeling system of a drainage system based on an SWMM model according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a flowchart of a method for modeling a fixed runoff coefficient of a drainage system based on an SWMM model according to some embodiments of the present disclosure. The method comprises the following steps:
s1, selecting a simulation area based on basic data reflecting basic conditions of a rainwater pipeline and a drainage area, wherein the simulation area comprises a plurality of sub-drainage areas, the interior of each sub-drainage area is further subdivided into a plurality of sub-subareas according to hydrological characteristics by SWMM software, and the sub-subareas comprise a permeable area A1, a non-permeable area A2 containing pits and a non-permeable area A3 containing no pits.
Specifically, referring to fig. 2, in order to simulate different underlying surfaces, in the present embodiment, each sub-drainage area is further subdivided into three sub-areas, namely a permeable area A1, a non-permeable area A2 containing a hollow and a non-permeable area A3 containing no hollow, according to the hydrological characteristics in the SWMM software, and the runoff between the permeable area and the non-permeable area can evolve mutually.
When the option of the radial flow operation is set as output, the flow converging diagram of the sub-drainage area is shown in fig. 2.
S2, setting parameters of each sub-drainage area according to the following rules: the evaporation intensity is set to be 0, snow is not melted, the ratio of A2 and A3 is set to be the comprehensive runoff coefficient of a simulation area, the ratio of A3 is set to be 100%, the depression water storage depth of A1 and A2 is set to be 0, the infiltration mode of A1 is set to be a Horton mode, the maximum infiltration rate and the minimum infiltration rate are equal and are larger than the peak intensity of the simulated rainfall time, the Manning coefficient of A1-A3 is set to be 0, and runoff calculation options between the maximum infiltration rate and the minimum infiltration rate are set to be OUTLET, and a water OUTLET is an inspection well or a discharge OUTLET.
Specifically, in view of the fact that the case area is small in water collection area and the degree of mixing of the underlying surface is high, and meanwhile, in order to be closer to engineering practice, the method for modeling the case area is based on the fixed runoff coefficient method.
In one embodiment, the pipeline flow is calculated by using a dynamic wave algorithm, and in view of the short length of the pipeline in the case zone part, the maximum calculation step length of the model is 10s to reduce the continuity error. The 3h simulation result shows that the surface runoff calculation continuity error is 0.00%, the pipeline flow calculation continuity error is less than 0.02%, and the model calculation is reasonable.
And S3, triggering the SWMM software to enter an operation mode, and completing the modeling of the fixed runoff coefficient of the drainage system.
According to the method for modeling the fixed runoff coefficient of the drainage system based on the SWMM model, the SWMM model is combined to carry out modeling by the fixed runoff coefficient method, and in the modeling process, the composition of the sub-areas in the drainage area and the reasonable setting of the parameters of the drainage area are combined, so that the defect that the SWMM cannot directly carry out modeling of the fixed runoff coefficient is overcome while the engineering practice is approached, and the application adaptability is improved.
In one embodiment, the main parameters of the sub-drainage region comprise a rain gauge, a water outlet, an area, a width, a non-permeable region proportion, a slope, a length of a side stone and a snow accumulation amount.
It should be noted that the main parameters of the underlying surface include the mannin coefficient of the non-permeable area, the mannin coefficient of the permeable area, the water storage depth of the non-permeable area, the water storage depth of the permeable area, the proportion of the non-permeable area without depression for water storage, the runoff calculation option and the runoff calculation proportion. The infiltration parameters include maximum infiltration rate, minimum infiltration rate, decay rate constant, emptying time, and possibly maximum infiltration volume.
In one embodiment, the method further comprises:
and S4, generalizing various line elements and point elements included in the simulation area to improve SWMM modeling quality and efficiency, wherein the line elements comprise at least one of a municipal rainwater trunk pipe, a user-connected rainwater pipe and a rainwater inlet connecting pipe, and the point elements comprise at least one of a municipal rainwater inspection well, a rainwater inlet, a blind well and a discharge port.
Specifically, the quality of the basic data is naturally uneven due to different construction time sequences and management levels of the pipelines. Therefore, in order to improve the SWMM modeling quality and efficiency, the data of the rainwater pipeline in the case area is generalized before modeling.
For example, suppose that 4594 line elements such as original municipal rainwater trunk pipes, user-receiving rainwater pipes and rainwater inlet connecting pipes in a case area and 4617 point elements such as original municipal rainwater inspection wells, rainwater inlets, blind wells and discharge ports are generalized according to the verification result, 465 municipal rainwater trunk pipes, 465 inspection wells, 9 discharge ports and 462 sub-drainage areas are reserved.
It should be noted that the minimum section of the pipeline in the case zone is d300mm, and the maximum section of the pipeline in the case zone is 3.7m × 1.9m; the length of the pipeline is 3m at the shortest and 80m at the longest.
In one embodiment, the pipeline can be selected to be a d1000mm reinforced concrete pipe, the ground gradient can be selected to be 3.9 per mill, and the flow capacity can be designed to be 1.4m 3 The catchment area (namely the S140 sub-drainage area) of the section can be designed to be 0.14hm 2 . The case zone SWMM model network can be understood with particular reference to fig. 3.
In one embodiment, in the modeling process, the method further comprises:
s5, simulating the flow production process of the sub-drainage area by adopting a nonlinear reservoir to eliminate the influence of evaporation, snow melting, infiltration and surface flow on the flow convergence of the land parcel, so that the water content of the land parcel is quickly converted into the flow convergence of a pipe network, wherein the flow production process comprises the following steps: when snow melting time is not available, evaporation intensity is 0, and water storage depth of the depression is 0, the surface runoff is equal to rainfall minus infiltration; when the penetration rate of the Horton is constantly higher than the rainfall intensity, the net rainfall is converted into surface runoff quickly; when the Manning coefficient of the permeable area and the non-permeable area is 0 and the runoff calculation option adopts OUTLET, runoff generated by different underlying surfaces and different sub-drainage areas is quickly connected into a pipe network.
In particular, the above-mentioned labor mechanism can be referred to fig. 4.
It should be noted that, SWMM analysis reports show that the runoff coefficient of each sub-drainage area is 0.70. Taking the S140 sub-drainage area as an example, in a rainfall scenario of P =1 year, the Runoff curve (Runoff) thereof is shown in fig. 5. According to the calculation of fig. 5, in the rainfall scenario with P =1a, the total runoff volume of the plot is 46.07m 3 The total rainfall is 65.27m 3 The runoff coefficient was 0.70, consistent with the analytical report. Based on this, the SWMM model sub-drainage area processing method proposed by the current embodiment can realize modeling by a fixed runoff coefficient method.
In one embodiment, in step S5, the process of producing the sub-drainage area is simulated based on the following formula:
wherein d is the nonlinear reservoir water storage depth and the unit is mm; i is the precipitation strength, and the unit is mm/h; e is the evaporation intensity in mm/h; f is the infiltration rate, and the unit is mm/h; and q is the surface runoff per unit area, and the unit is mm/h. Note that a parameter ds shown in fig. 4 is a depression water storage depth, and the unit thereof is mm.
In one embodiment, in the modeling process, the method further comprises:
s6, comprehensively evaluating the short-duration rainfall scene of the simulation area according to a rainstorm intensity formula, wherein the designed rainfall type adopts a Chicago rainfall type, the duration of the rainfall is set to be 2 hours, and the time sequence of the rainfall events is obtained by calculation according to the following formula:
wherein t is the duration of rainfall and the unit is min; p is the design recurrence period in years; q is the surface runoff per unit area, and the unit is L/(s.hm) 2 )。
Specifically, in the present embodiment, the situations of short-duration rainfall in the case zone are comprehensively evaluated according to the rainstorm intensity formula, with reference to "urban waterlogging prevention and control planning standards (survey comments)" (build criteria [2017 ]) No. 110.
In one embodiment, the time step of the rainfall event is 1min, the design recurrence period p in the formula is set to take values according to the general programming and compiling principle of urban drainage (rainwater) waterlogging prevention (building city [2013 ]) No. 98), and the embodiment of the application is not limited to specific values.
Please refer to fig. 6, which is a block diagram of a SWMM model-based drainage system fixed runoff coefficient modeling system 600 of the present disclosure, the system including a simulation region selection module 601, a parameter setting module 602, and a modeling module 603, wherein:
the simulation area selection module 601 is used for selecting a simulation area based on basic data reflecting basic conditions of a rainwater pipeline and a drainage area, the simulation area comprises a plurality of sub-drainage areas, the interior of each sub-drainage area is further subdivided into a plurality of sub-areas according to hydrological characteristics by SWMM software, and the sub-areas comprise a permeable area A1, a non-permeable area A2 containing hollow and a non-permeable area A3 without hollow.
The parameter setting module 602 is configured to set parameters of each sub-drainage area according to the following rules: the evaporation intensity is set to be 0, snow is not melted, the occupation ratio of A2 and A3 is set to be the comprehensive runoff coefficient of a simulation area, the occupation ratio of A3 is set to be 100%, the depression water storage depth of A1 and A2 is set to be 0, the infiltration mode of A1 is set to be a Horton mode, the maximum infiltration rate and the minimum infiltration rate are equal and are greater than the peak intensity of the simulated rainfall time, the Manning coefficient of A1-A3 is set to be 0, and the runoff calculation options between the maximum infiltration rate and the minimum infiltration rate are set to be OUTLET and the water OUTLET is an inspection well or a discharge OUTLET.
The modeling module 603 is configured to trigger the SWMM software to enter an operating mode, so as to complete modeling of the fixed runoff coefficient of the drainage system.
In one embodiment, the modules are further configured to execute the method in any optional implementation manner of the embodiment.
According to the fixed runoff coefficient modeling system of the drainage system based on the SWMM model, the fixed runoff coefficient method modeling is carried out by combining the SWMM model, the composition of the sub-zones in the drainage area and the reasonable setting of the parameters of the drainage area are combined in the modeling process, the defect that the SWMM cannot directly carry out the fixed runoff coefficient modeling is overcome when the engineering practice is approached, and the application adaptability is improved.
The embodiment of the present application provides a readable storage medium, and the computer program, when executed by a processor, performs the method in any optional implementation manner of the above embodiment. The storage medium may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as a Static Random Access Memory (SRAM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), an Erasable Programmable Read-Only Memory (EPROM), a Programmable Read-Only Memory (PROM), a Read-Only Memory (ROM), a magnetic Memory, a flash Memory, a magnetic disk, or an optical disk.
The readable storage medium is combined with the SWMM model to carry out fixed runoff coefficient method modeling, and in the modeling process, the composition of the sub-regions in the drainage region and the reasonable setting of the parameters of the drainage region are combined, so that the defect that the SWMM cannot directly carry out fixed runoff coefficient modeling is overcome while the engineering practice is approached, and the application suitability is improved.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described apparatus embodiments are merely illustrative, and for example, the division of the units into only one type of logical function may be implemented in other ways, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some communication interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A modeling method for a fixed runoff coefficient of a drainage system based on an SWMM model is characterized by comprising the following steps:
s1, selecting a simulation area based on basic data reflecting basic conditions of a rainwater pipeline and a drainage area, wherein the simulation area comprises a plurality of sub-drainage areas, the interior of each sub-drainage area is further subdivided into a plurality of sub-subareas by SWMM software according to hydrological characteristics, and the sub-subareas comprise a permeable area A1, a non-permeable area A2 containing pits and a non-permeable area A3 containing no pits;
s2, setting parameters of each sub-drainage area according to the following rules: setting evaporation intensity as 0, no snow melting, setting the proportion of A2 and A3 as the comprehensive runoff coefficient of a simulation area, setting the proportion of A3 as 100%, setting the depression water storage depth of A1 and A2 as 0, setting the infiltration mode of A1 as a Horton mode, setting the maximum infiltration rate and the minimum infiltration rate as equal and larger than the peak intensity of the simulated rainfall time, setting the Manning coefficient of A1-A3 as 0, and setting runoff calculation options between the maximum infiltration rate and the minimum infiltration rate as OUTLET and the water OUTLET as an inspection well or a discharge port;
and S3, triggering the SWMM software to enter an operation mode, and completing the modeling of the fixed runoff coefficient of the drainage system.
2. The method of claim 1, wherein the main parameters of the sub-drainage zones include rain gauge, water outlet, area, width, non-permeable zone fraction, slope, kerb length, and snow accumulation.
3. The method of claim 1, wherein during modeling, the method further comprises:
and S4, generalizing various line elements and point elements included in the simulation area so as to improve SWMM modeling quality and efficiency, wherein the line elements comprise at least one of municipal rainwater trunk pipes, user-connected rainwater pipes and rainwater inlet connecting pipes, and the point elements comprise at least one of municipal rainwater inspection wells, rainwater inlets, hidden wells and discharge ports.
4. The method of claim 1, wherein during modeling, the method further comprises:
s5, adopting the non-linear reservoir to simulate the flow production process of the sub-drainage area so as to eliminate the influence of evaporation, snow melting, infiltration and surface flow on the flow production and convergence of the land, and quickly converting the water quantity of the land into the flow converging quantity of a pipe network, wherein the flow production process comprises the following steps:
when snow melting time is not available, evaporation intensity is 0, and water storage depth of the depression is 0, the surface runoff is equal to rainfall minus infiltration;
when the Horton infiltration rate is constantly higher than the rainfall intensity, the net rainfall is all quickly converted into surface runoff;
when the Manning coefficient of the permeable area and the non-permeable area is 0 and the runoff calculation option adopts OUTLET, runoff generated by different underlying surfaces and different sub-drainage areas is quickly connected into a pipe network.
5. The method according to claim 4, characterized in that in step S5, the runoff producing process of the sub-drainage area is simulated based on the following formula:
wherein d is the nonlinear reservoir water storage depth and the unit is mm; i is the precipitation strength, and the unit is mm/h; e is evaporation intensity in mm/h; f is the infiltration rate, and the unit is mm/h; and q is the surface runoff per unit area, and the unit is mm/h.
6. The method of claim 1, wherein during modeling, the method further comprises:
s6, comprehensively evaluating the short-duration rainfall scene of the simulation area according to a rainstorm intensity formula, wherein the designed rainfall type adopts a Chicago rainfall type, the duration of the rainfall is set to be 2 hours, and the time sequence of the rainfall events is obtained by calculation according to the following formula:
wherein t is the duration of rainfall and the unit is min; p is the design recurrence period, and the unit is year; q is the surface runoff per unit area, and the unit is L/(s.hm) 2 )。
7. The modeling system for the fixed runoff coefficient of the drainage system based on the SWMM model is characterized by comprising a simulation region selection module, a parameter setting module and a modeling module, wherein:
the simulation area selection module is used for selecting a simulation area based on basic data reflecting basic conditions of a rainwater pipeline and a drainage area, the simulation area comprises a plurality of sub-drainage areas, the interior of each sub-drainage area is further subdivided into a plurality of sub-partitions by SWMM software according to hydrological features, and the sub-partitions comprise a permeable area A1, a non-permeable area A2 containing the hollow and a non-permeable area A3 containing no hollow;
the parameter setting module is used for setting parameters of each sub-drainage area according to the following rules: setting evaporation intensity as 0, no snow melting, setting the proportion of A2 and A3 as the comprehensive runoff coefficient of a simulation area, setting the proportion of A3 as 100%, setting the depression water storage depth of A1 and A2 as 0, setting the infiltration mode of A1 as a Horton mode, setting the maximum infiltration rate and the minimum infiltration rate as equal and larger than the peak intensity of the simulated rainfall time, setting the Manning coefficient of A1-A3 as 0, and setting runoff calculation options between the maximum infiltration rate and the minimum infiltration rate as OUTLET and the water OUTLET as an inspection well or a discharge port;
and the modeling module is used for triggering the SWMM software to enter an operation mode to complete the modeling of the fixed runoff coefficient of the drainage system.
8. A readable storage medium, characterized in that the readable storage medium comprises a SWMM model-based fixed runoff coefficient modeling method program of a drainage system, which when executed by a processor, implements the steps of the method as claimed in any one of claims 1 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7136756B1 (en) * | 2004-11-02 | 2006-11-14 | Vieux And Associates, Inc. | Method for determining runoff |
| CN108446464A (en) * | 2018-03-05 | 2018-08-24 | 重庆大学 | A method of utilizing the big drainage system of SWMM model constructions |
| CN109492299A (en) * | 2018-11-07 | 2019-03-19 | 南开大学 | The water resource simulation method coupled based on SWMM with MODFLOW |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7136756B1 (en) * | 2004-11-02 | 2006-11-14 | Vieux And Associates, Inc. | Method for determining runoff |
| CN108446464A (en) * | 2018-03-05 | 2018-08-24 | 重庆大学 | A method of utilizing the big drainage system of SWMM model constructions |
| CN109492299A (en) * | 2018-11-07 | 2019-03-19 | 南开大学 | The water resource simulation method coupled based on SWMM with MODFLOW |
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