CN105740336A - Method for converting SWMM pipeline network hydraulic power model Inp file into GIS - Google Patents

Abstract

The invention discloses a conversion method from an SWMM pipe network hydraulic model Inp file to a GIS model database Shp file, which belongs to the cross field of municipal engineering and geographic information engineering technology. Starting from the update management of SWMM model data, this patent proposes a conversion method from Inp file to Shp file, combined with the conversion from GIS database to Inp file, to realize the two-way conversion between GIS and SWMM data. When it is necessary to update the data of the existing SWMM hydraulic model Inp file, the advantage of the Shp file being easy to modify and update can be effectively used, and its data can be updated and utilized more conveniently when the model number is updated, and it can be used with the GIS database to Inp Combined with the conversion of files, the two-way conversion between GIS and SWMM data is realized.

Description

A GIS-based method of Inp file of SWMM pipe network hydraulic model

technical field

The invention relates to a method for converting an Inp file of a SWMM pipe network hydraulic model to a Shp file of a GIS database, which belongs to a cross field of municipal engineering technology and geographic information engineering technology.

Background technique

The drainage pipe network system is an indispensable and important facility in the construction of a modern city and an important part of the city's basic construction. With the construction of large domestic cities and the acceleration of urbanization, the scale of the pipe network continues to expand, and the data update frequency of the pipe network is getting faster and faster. The design of the traditional urban drainage pipe network has shown that it cannot meet the actual needs. There are frequent occurrences of waterlogging.

my country currently adopts the constant uniform flow reasoning formula: Qs = qΨF to calculate the rainwater design flow. The constant uniform flow inference formula is based on the following assumptions: the distribution of rainfall over the entire catchment area is uniform; The formula is suitable for the calculation of small-scale drainage systems, but when applied to the calculation of larger-scale drainage systems, large errors will occur. With the advancement of technology, the enlargement of pipe diameter, the improvement of water pump capacity, and the gradual expansion of catchment area of drainage system, the accuracy of the reasoning formula should be revised. On the basis of summarizing domestic and foreign data, on February 10, 2014, the Ministry of Housing and Urban-Rural Development of my country issued an announcement, approving the "Code for Design of Outdoor Drainage" (GB50014-2006) (2014 Edition) to be officially implemented since the release date. Article 3.2.1 of the new version of "Code for Design of Outdoor Drainage" requires that the design flow of rainwater be calculated using the inference formula method. When the catchment area exceeds 2km ² , the mathematical model method should be adopted. Model calculations will be increasingly used in pipe network design. SWMM model data is stored in Inp files. Even if a very large amount of data is stored, the memory footprint of the file is very small. Generally, the model data used is within a few MB, and the reading speed is fast, which is convenient for storage and application.

The SWMM model is a storm runoff management model designed by the U.S. Environmental Protection Agency in order to solve the increasingly serious urban drainage problems since the 1970s. The SWMM model can perform dynamic simulations of single rainstorms and continuous long-term rainfall. Then it can provide a basis for the design of urban drainage system. In stormwater planning and design, the model method is currently widely used in many countries. The SWMM model of the US Environmental Protection Agency is a very useful calculation engine that has reached a broad consensus. The reading and running files used by the SWMM model are Inp format files . If the Inp file can be converted into a geographic information system file, it will be beneficial to the management and update of model data.

ArcGIS is a widely used geographic information processing system. The object of GIS processing and management is a variety of geospatial entity data and their relationships, including spatial positioning data, graphic data, remote sensing image data, attribute data, etc., which are used to analyze and process various phenomena and process to solve complex planning, decision-making and management problems. GIS data is stored in the Shp file format with points, lines, and surfaces, which is used to represent the spatial distribution and geometric shape of graphics, and record the attribute data of graphics. It is more and more widely used in hydraulic models.

As the urban pipe network data is getting larger and larger, other data storage application methods consume more and more computer memory, and the requirements for the computer are getting higher and higher. However, the SWMM pipe network hydraulic model is stored in Inp files. Occupancy, reading speed, and processing speed have great advantages over other files. In many cases, we need to update the existing Inp file data, but it is relatively difficult to directly update the data of the Inp file. Now For the conversion of the GIS database Shp file to the Inp file, a lot of research has been done. In order to realize the bidirectional conversion of the GIS and SWMM database, and more mainly from the update management of the SWMM pipe network hydraulic model Inp file, the present invention proposes a method by SWMM The method of converting the Inp file of the model to the Shp file of the GIS database. According to the Inp file of the SWMM model, it corresponds to the attributes of the Shp file, quickly converts it into a Shp file, and updates the data in the Shp file, which brings convenience to the data management and update of the SWMM model.

Contents of the invention

The purpose of the present invention is to propose a method for converting the Inp file of the SWMM pipe network hydraulic model to the Shp file of the GIS database, so as to realize more convenient management and update of the existing SWMM pipe network hydraulic model data.

Technical scheme of the present invention is as follows:

From the SWMM pipe network hydraulic model Inp file to the conversion method of the GIS database Shp file, the method comprises the following steps in turn:

(1) Create the target data layer

Construct the structural attributes of the target GIS database Shp file, including point, line, and surface elements. Point elements inspect wells, outlets, and reservoirs, line elements pipe segments and pumps, and area elements catchment areas. Check well attribute input number, well bottom elevation, well depth, initial water depth; reservoir attribute input number, bottom elevation, maximum water depth, initial water depth, curve number and ponding area field; water outlet attribute input number, bottom elevation, discharge type , moisture-proof door field; input number, inlet node, outlet node, length, inlet offset, outlet offset, shape, diameter, and channel width fields for pipe segment attributes; input number, inlet node, outlet node, and curve number for pump attributes , Initial State, Open Depth, and Closed Depth fields; Catchment Attribute Input Number, Rain Gauge Number, Outlet, Area, Impervious Area Percentage, Width, Slope fields.

(2) Reading and selection of Inp files

The present invention analyzes the structure of the Inp file, can read the data of each element in the Inp file, and displays it in the form of a graph, and can respectively display the catchment area, nodes, water outlets, reservoirs, pipe sections, and water pumps. The data and its attributes can be extracted separately and completely, or a certain type of partial data and its attributes can be extracted according to the requirements.

(3) Each element of the Inp file matches the structure of the Shp file data

The conversion of Inp to Shp file adopts the relationship of individual element and individual structure conversion. The Name, Raingage, Outlet, TotalArea, Pcnt.Imperv, Width, and Pcnt.Slope in the subcatchment element in the Inp file correspond to the number of the data layer attribute of the sink area and the number of the rain gauge in the surface element of the GIS database Shp file , Outlet, Area, Percentage of Impervious Area, Width, and Slope fields; Name, InvertElev., Max.Depth, and Init.Depth in the node element in the Inp file correspond to the inspection well data layer in the point element of the GIS database Shp file respectively Number, well bottom elevation, well depth, initial water depth; Name, InvertElev., OutfallType, and TideGate in the outlet element in the Inp file correspond to the number, bottom elevation, discharge type, and moisture protection of the point element outlet data layer of the GIS database Shp file respectively Gate field; Name, InvertElev., Max.Depth, Init.Depth, CurveParams, and PondedArea in the reservoir element in the Inp file correspond to the number, bottom elevation, maximum water depth, initial Water depth, curve number and ponding area fields; Name, InletNode, OutletNode, Length, InletOffset, OutletOffset, Shape, Geom1 and Geom2 in the pipe element in the Inp file correspond to the number, water inlet node, and water outlet of the pipe data layer of the GIS database respectively Node, Length, Inlet Offset, Outlet Offset, Shape, Diameter, and Canal Width fields; Name, InletNode, OutletNode, PumpCurve, Init.Status, StartupDepth, and ShutoffDepth in the pump element in the Inp file correspond to the pump data in the GIS database Layer number, water inlet node, water outlet node, curve number, initial state, open depth and closed depth fields; X-Coord and Y-Coord in the file are the positioning data for elements, corresponding to the X coordinates and Y-coordinate.

(4) Conversion and extraction of Inp file data to Shp data

Adopt the method corresponding to the data attribute described in (3), utilize computer to carry out the automatic conversion and extraction of Inp file to Shp file, generate the Shp file of required catchment area, node, water outlet, reservoir, pipe section, water pump .

The beneficial effects of converting the SWMM pipe network hydraulic model data Inp file into the GIS database Shp file according to the present invention are mainly reflected in:

1. adopt the method described in the present invention, can make full use of the superiority aspect storage and processing of Inp file, many existing Inp files, have overcome the shortcoming of the inconvenience of data update processing, have made full use of in GIS platform processing Advantages of Model Data. Combined GIS to Inp conversion technology to realize the two-way conversion between GIS and SWMM database.

2. This patent uses the existing SWMM platform and GIS platform to convert data, only need to extract and convert data, simple operation, fast conversion speed and high accuracy, which ensures the feasibility of the practical application of this patent.

3. For the Inp data file of the SWMM model, when updating and modifying certain database content, it is only necessary to convert the elements to be updated into Shp files for modification, which greatly simplifies the difficulty of data update. According to the general four thousand To put it simply, manual entry requires several days of work and is prone to errors. According to this patent, it only takes a few minutes and the accuracy is reliable, which greatly improves work efficiency.

Description of drawings:

Figure 1 is a schematic diagram of the workflow of the present invention.

detailed description:

The implementation process of the present invention is shown in Figure 1, comprises the following steps:

(1) Create the target data layer

According to the needs of data conversion, construct the target Shp data file, including point, line, area elements and their related data attributes.

(2) Reading of Inp file and element selection

By adopting the method of the present invention, the existing Inp file is read, and the Inp file is displayed in a graphic format, which is beneficial to the independent selection of the elements that need to be converted. The present invention adopts multiple selection methods to classify the elements. Complete selection, or partial data selection of a specific element category according to individual needs.

(3) The Inp file matches the data of the Shp file

On the basis of (2), the data attributes of the selected pipe network data Inp file elements and the Shp file data structure are matched.

(4) Data conversion and extraction

According to the matching relationship of the data attributes in (3), GIS conversion is performed on the selected elements, the converted Shp file is automatically extracted, and the corresponding Shp file is generated and saved.

(5) Data update

Utilizing the convenience of the GIS database, according to the change of the actual data, the data that needs to be updated in the SWMM pipe network hydraulic model are updated accordingly.

Claims (2)

1. the method based on the GISization of SWMM hydraulic pipeline model Inp file, it is characterized in that: utilize existing SWMM hydraulic pipeline model Inp file data, it is identified reading to it, display in a graphical form, select corresponding factor data, Inp cultural element attribute is mated with GIS database Shp file data attribute, the data selected are changed automatically, utilize Shp file that SWMM hydraulic pipeline model data is updated, and in combinations with the technology that GIS data is changed to Inp file, realize GIS database and the bi-directional conversion of SWMM data base.

2. comprise the following steps according to a kind of GISization method based on SWMM hydraulic pipeline model Inp file in claim 1:

(1) target data layer is created

Building the determination of the structure attribute of target database Shp file, including point, line, surface element, some element includes inspection shaft, outlet, cistern, line element pipeline section and water pump and surface element water catchment area.Inspection shaft attribute input numbering, shaft bottom elevation, well depth, initial depth of water field；Cistern attribute input numbering, Bottom Altitude, maximum water depth, the initial depth of water, Curve numberings and ponding area field；Outlet attribute input numbering, Bottom Altitude, discharge type, tide gate field；Pipeline section attribute input numbering, water inlet node, water outlet node, length, water inlet skew, water outlet skew, shape, diameter and width of the channel field；Water pump attribute input numbering, water inlet node, water outlet node, Curve numberings, original state, the unlatching degree of depth and closedown depth field；Water catchment area attribute input numbering, pluviometer numbering, outlet, area, impervious zone percentage ratio, width, gradient field.

(2) reading of Inp file selects with key element

For preparing the Inp file of conversion, what carry out key element identifies reading automatically, by the display being patterned of the key element of reading, it is easy to follow-up selection, can adopt key element to automatically select with feature category or adopt and manually carry out a certain amount of factor data selection, adopt the key element that colouring discrimination selects.

(3) structure matching of Inp cultural element and Shp file data is selected

Inp is converted to Shp file and adopts the relation of independent key element and independent cooperating measure.The numbering of GIS database Shp file surface element Zhong Hui district data layer attributes, pluviometer numbering, outlet, area, impervious zone percentage ratio, width, gradient field are corresponded respectively to for Name, Raingage, Outlet, TotalArea, Pcnt.Imperv, Width, the Pcnt.Slope in the sub-water catchment area key element in Inp file；The numbering of inspection shaft data Layer, shaft bottom elevation, well depth, initial depth of water field in Name, InvertElev., Max.Depth, Init.Depth in node key element in Inp file corresponding GIS database Shp file point element respectively；Name, InvertElev., OutfallType, TideGate in outlet key element in Inp file be the corresponding numbering of GIS database Shp file point element outlet data Layer, Bottom Altitude, discharge type, tide gate field respectively；The Name in cistern key element in Inp file, InvertElev., Max.Depth, Init.Depth, CurveParams and the PondedArea corresponding numbering of GIS database Shp file point element cistern data Layer, Bottom Altitude, maximum water depth, the initial depth of water, Curve numberings and ponding area field respectively；The Name in pipeline section key element in Inp file, InletNode, OutletNode, Length, InletOffset, OutletOffset, the numbering of Shape, Geom1 and Geom2 corresponding GIS database pipeline section data Layer respectively, intake node, water outlet node, length, water inlet skew, water outlet skew, shape, diameter and width of the channel field；The Name in water pump key element in Inp file, InletNode, OutletNode, PumpCurve, Init.Status, StartupDepth and ShutoffDepth distinguish the numbering of corresponding GIS database Pump data layer, water inlet node, water outlet node, Curve numberings, original state, the unlatching degree of depth and close depth field；X-Coord and Y-Coord in file is the location data to key element, corresponding to X-coordinate and the Y coordinate of each data Layer.

(4) Inp file is to the conversion of Shp data and extraction

Matching relationship according to Inp cultural element in (3) Yu GIS database Shp file data structure attribute, the key element selected is carried out GIS conversion, Inp file data is converted to the file data of Shp form, the Shp file data of conversion is extracted, the corresponding Shp file generating required water catchment area, node, outlet, cistern, pipeline section, water pump, selects to preserve.