A river network hydraulic calculation modeling method based on BIM and GIS platform

Abstract

The present invention provides a river network hydraulic calculation modeling method based on BIM and GIS platform. Aiming at the problems of large modeling workload, high data processing difficulty and low modeling efficiency of existing river network hydraulic calculation software, the data processing and data intercommunication capabilities of the existing BIM+GIS platform are utilized to efficiently realize the establishment of river network waterway calculation models of different details and dimensions under different waterway regulation schemes, including one-dimensional, two-dimensional and three-dimensional hydraulic models.

Description

Technical Field

[0001] The present invention belongs to the field of engineering design, simulation and software development, and specifically relates to a process and method for efficiently and consistently modeling hydraulic models of river networks and waterways of different dimensions by combining BIM (Building Information Modeling) and GIS (Geographic Information System) platforms. Background Art

[0002] The plain river network area has dense river networks and water flows through; the river channels are dense, the hydrological conditions are complex, the navigation conditions are poor, and the flood control pressure during the flood season is relatively large. The management of navigation conditions and rain and flood disasters in river network areas is inseparable from the study of the laws of water flow in the basin.

[0003] At present, the most common method for studying river flow conditions is to establish a river network hydraulic model for hydraulic simulation. In existing hydraulic simulation software such as DHI Mike, the model contains many elements. The macro one-dimensional simulation includes information such as the direction of the main and tributary rivers, the original terrain section, the regulation plan section, the water retaining structure, and the research boundary, while the two-dimensional and three-dimensional models contain more scattered terrain information. The large amount of model information has brought a lot of workload to the modeling work. The annual construction of various waterway regulation projects and water conservancy and flood control projects has also put forward higher requirements for the timely modification and updating of river network modeling information.

[0004] At present, the commonly used hydraulic software uses different file formats to build models. The model is established by editing text files, which is labor-intensive and prone to errors during manual editing. Due to the relatively simple processing methods, the accuracy of the established model is low. Due to the complexity of water flow conditions in the river area, the diversity and complexity of the waterway regulation plan have increased the workload and difficulty of hydraulic modeling of river networks and waterways. When various river-blocking hydraulic structures are integrated with river conditions, it is also easy to cause inconsistencies between different dimensional models such as one-dimensional, two-dimensional and three-dimensional models with different details, thereby affecting the correctness of the model calculation. Summary of the invention

[0005] The purpose of the invention is to provide a river network hydraulic calculation modeling method based on BIM and GIS information model and information processing technology, so as to realize the efficient integration of different waterway regulation schemes and river information and the efficient creation of river network models in different detail dimensions, and at the same time realize the precise positioning of river-blocking structures and maintain the consistency of model conditions between different dimensions.

[0006] To solve the above problems, the present invention provides the following technical solutions:

[0007] A river network hydraulic calculation modeling method based on BIM and GIS platform includes the following steps:

[0008] Step 1: River network BIM model construction: Based on the topographic surveying data, use the BIM engineering design platform Civil3d to build the terrain surface model, main and tributary flow direction model, embankment model, river network section and river-blocking building location model of the corresponding river network area;

[0009] Step 2: Construction of BIM model of waterway regulation scheme: Based on the waterway regulation design data, use the BIM engineering design platform Civil3d to build a regulation model of the relevant regulated river section;

[0010] Step 3: Construction of the BIM model of the river-blocking structure: Based on the engineering design data, use the BIM engineering design platform Revit to build the corresponding river-blocking structure model, including the bridge model, culvert model, and sluice gate model;

[0011] Step 4: Convert the river network BIM model to a GIS model: Use the data interoperability function of the GIS platform ArcGIS to import the BIM model and convert it into the initial GIS model of the river network on the ArcGIS platform;

[0012] Step 5: GIS model processing: Using ArcGIS data processing functions, edit and convert the initial GIS model of the river network on the ArcGIS platform to a high-precision river network fine GIS model;

[0013] Step 6: GIS model export: Use ArcGIS data export function to export the GIS models of river network dimensions on ArcGIS platform and process them into GIS models of river network dimensions in spatial information file format and text format;

[0014] Step 7: Construction of one-dimensional hydrodynamic model: Use the hydrodynamic modeling platform DHI Mike to import the spatial information file of the one-dimensional fine GIS model of the river network, set additional information for model operation, complete the construction of the one-dimensional model of the river network, and complete the hydraulic simulation process;

[0015] Step 8: For river sections that require local fine modeling, use the research boundary to intercept and export the model, use the results of the one-dimensional model hydraulic simulation to set additional information for model operation, and complete the creation of a complete two-dimensional or three-dimensional model of the river network and waterway.

[0016] Further technology of the present invention:

[0017] Preferably, in step 1, the BIM engineering design platform Civil3d is used, and terrain surveying and mapping data are used to produce a terrain surface model, which includes surface boundaries; an elevation analysis is performed on the surface, and with the assistance of the terrain elevation background, the center lines of the main and tributary rivers of the river network and the embankment lines are made to establish a river network direction model and a levee model; a sampling line is created, and terrain sampling is performed along the direction of the river network to obtain a river section model; according to the river pile number where the river-blocking structure is located, a section at the corresponding pile number is created to obtain a structure location model.

[0018] Preferably, in step 2, the regulation scheme model generated by the BIM engineering design platform Civil3d mainly includes the longitudinal section and the cross section of the regulated river section. The above data can be combined into a series of three-dimensional multi-segment line combinations to form the channel bottom contour line, that is, the channel regulation model.

[0019] Preferably, in step 3, the structural model of the dam structure includes the main dimensions of the structure, and the coordinates of each control point of the structure use the coordinates of the location of the structure.

[0020] Preferably, in step 5, the GIS element editing function of the GIS platform is used to debug and refine the initial GIS model of the river network, including:

[0021] Step 5-1: Use ArcGIS's geometric feature editing tools to eliminate the discontinuities between river sections and establish an interconnected river network topology. At the same time, use the polyline encryption function to smooth the river network lines to make them more consistent with the natural characteristics of the river.

[0022] Step 5-2: Use ArcGIS spatial feature data editing tools to delete abnormal points on the river section elements and delete the section that exceeds the embankment;

[0023] Step 5-3: Use ArcGIS spatial feature data editing tools to extract the obstruction of navigation on the river channel. The new feature is stored in the GIS fine model, and the attribute is set as the inner boundary model;

[0024] Step 5-4: Use ArcGIS TIN and raster data editing tools to create elevation TIN models and raster models using elevation scatter points; use the raster data clipping function to clip data outside the model boundary; create a local elevation raster model of the structure based on the structure model, and use the raster fusion function to combine the local terrain with the overall terrain;

[0025] Under the condition that there is a regulation plan for the original river channel, after importing it into the GIS platform to become a GIS waterway regulation model, it is necessary to merge it with the river channel raster data according to the following steps;

[0026] Step 5-5: Use ArcGIS TIN creation tool to create a TIN model of the channel regulation scheme from the three-dimensional polyline sequence of the channel bottom of the channel regulation scheme;

[0027] Step 5-6: Use ArcGIS raster creation tools to convert the waterway regulation scheme TIN model into a waterway regulation scheme raster model;

[0028] Step 5-7: Use ArcGIS's raster Mosaic tool to merge the raster model of the waterway regulation plan with the terrain created in step 5-4. Considering that waterway regulation only involves excavation but not filling of the riverbed, the Mosaic must use the MINIMUM option.

[0029] Preferably, in step 7, when the hydrodynamic platform imports the one-dimensional model, the one-dimensional model includes the import of corresponding files or information generated by the river network topology model, the river section model, the address model and the cross-section model in the GIS fine model.

[0030] Preferably, in step 8, the two-dimensional and three-dimensional models include the import of corresponding files or information generated by the address model and longitudinal section model in the GIS boundary model, GIS elevation grid model and GIS structure model.

[0031] At present, the amount of information processed in the hydrodynamic simulation modeling process is large and varied, and the way of editing the model with a text file interface is prone to errors, which has caused inconsistencies in model data between different dimensions, ultimately affecting the correctness of the calculation. Compared with the above-mentioned existing modeling technology, the beneficial effects of the present invention are:

[0032] The present invention unifies the data from different sources required for water conservancy calculation modeling on the GIS platform to form a unified data source, thus ensuring the consistency of data between water conservancy models of various dimensions;

[0033] The present invention utilizes the powerful engineering scheme design capability of the BIM design platform and the powerful data processing capability of the GIS platform. The method of the present invention efficiently realizes the needs of establishing, debugging, and integrating the data required for modeling, and significantly improves the processing efficiency of complex model data.

[0034] The present invention uses the GIS secondary development interface to export the data file formats required by the hydraulic calculation software for each dimensional model, so that different dimensional models can be established on the hydraulic software calculation platform by using BIM+GIS modeling once, thus expanding the hydraulic simulation application scope of the hydraulic software from macro to micro fields;

[0035] The present invention significantly solves the problems of inefficiency and data consistency in hydraulic calculation modeling of river network waterways. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a schematic diagram of the main execution process and model data flow of the present invention;

[0038] Figure 2 It is a river network BIM terrain model diagram of a part of a river section in a specific embodiment of the present invention;

[0039] Figure 3 It is a longitudinal section diagram of a waterway regulation design in a specific embodiment of the present invention;

[0040] Figure 4 It is a cross-sectional assembly drawing of a waterway regulation design in a specific embodiment of the present invention;

[0041] Figure 5 It is a model diagram of a river-blocking structure bridge in a specific embodiment of the present invention;

[0042] Figure 6 It is a GIS grid model diagram integrating the remediation plan in a specific embodiment of the present invention;

[0043] Figure 7 It is a complete one-dimensional model diagram of a river network channel including cross-river buildings in a specific embodiment of the present invention;

[0044] Figure 8 It is a two-dimensional model diagram of a waterway for local fine simulation in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0045] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] Figure 1 The main execution process and model data transfer process of the present invention are as follows: Figure 1 ), taking a river network as an example to perform hydrodynamic modeling, the river network includes a main stream and three tributaries, the main stream is more than 200 kilometers long, the river channel is complex, and there are nearly 200 typical sections, so the modeling workload is large. The method of this embodiment mainly includes:

[0047] Step 1: Based on the topographic survey data, use the BIM engineering design platform Civil3d to create a terrain surface model using the topographic survey data ( Figure 2), the model includes the surface boundary; perform elevation analysis on the surface, and with the assistance of the terrain elevation background, draw the center lines of the main and tributary rivers of the river network and the levee lines to establish the river network direction model and levee model; create sampling lines, perform terrain sampling along the river network direction, and obtain the river section model; according to the river pile number where the river-blocking structure is located, create the section where the corresponding pile number is located to obtain the structure location model.

[0048] Step 2: Based on the channel regulation design data, the regulation scheme model generated using the BIM engineering design platform Civil3d mainly includes the longitudinal section and cross section of the regulated river section. The above data can be combined into a series of three-dimensional multi-segment line combinations to form the channel bottom contour line, namely the channel regulation model.

[0049] Step 3: Based on the engineering design data, use the BIM engineering design platform Revit to build the bridge model included in the structural model of the corresponding river-blocking building ( Figure 5 ), culvert model, sluice gate model, etc.

[0050] The structural model of the dam structure includes the main dimensions of the structure, and the coordinates of each control point of the structure use the coordinates of the location of the structure.

[0051] Step 4: Convert the river network BIM model to the initial GIS model: Use the data interoperability function of the GIS platform ArcGIS to import the BIM model and convert it into spatial elements such as points and lines on the ArcGIS platform, i.e. the initial GIS model of the river network;

[0052] The initial GIS model is organized by a data frame in ArcGIS and is assigned the geographic spatial coordinate system represented by the BIM model in the data frame; the characteristics of the model included in the initial GIS model are as follows:

[0053]

[0054]

[0055] The coordinate points in the model included in the initial GIS model are all real geographic space coordinate points established by the BIM model. Among them, the structure model-cross-section model and the structure model-longitudinal section model are exported to the ArcGIS platform by the secondary development function of the BIM engineering design platform Revit; the river section model and the structure model-address model are exported to the ArcGIS platform by the secondary development function of the BIM engineering design platform Civil3d; the remaining initial GIS models can use the data interoperability between ArcGIS and the BIM platform to convert BIM data into spatial point and line GIS elements with attribute data in the initial GIS model.

[0056] Step 5: Using ArcGIS data processing functions, edit and convert the initial GIS model of the river network on the ArcGIS platform, and merge the regulation scheme model with the original terrain model to form a raster model of the regulated river channel ( Figure 6 ), by controlling the tile size of the grid, a high-precision river network fine GIS model is generated;

[0057] The fine GIS model is organized by the DataFrame in ArcGIS and is given the geographic spatial coordinate system represented by the BIM model in the DataFrame. The features of the models included in the fine GIS model are as follows:

[0058]

[0059] In step 5, the GIS element editing function of the GIS platform is used to debug and refine the initial GIS model of the river network. This includes:

[0060] Step 5-1: Use ArcGIS's geometric feature editing tools to eliminate the discontinuities between river sections and establish an interconnected river network topology. At the same time, use the polyline encryption function to smooth the river network lines to make them more consistent with the natural characteristics of the river.

[0061] Step 5-2: Use ArcGIS spatial feature data editing tools to delete abnormal points on the river section elements and delete the section that exceeds the embankment.

[0062] Step 5-3: Use ArcGIS spatial feature data editing tools to extract the obstruction of navigation on the river channel. The new feature is stored in the GIS fine model and the attribute is set as the inner boundary model.

[0063] Step 5-4: Use ArcGIS's TIN and raster data editing tools to create an elevation TIN model and raster model using elevation scatter points. Use the raster data clipping function to clip the data outside the model boundary. Based on the structure model, create a local elevation raster model where the structure is located, and use the raster fusion function to combine the local terrain with the overall terrain.

[0064] Under the condition that there is a regulation plan for the original river channel, after importing it into the GIS platform to become a GIS waterway regulation model, it is necessary to merge it with the river channel raster data according to the following steps:

[0065] Step 5-5: Use ArcGIS TIN creation tool to create a TIN model of the channel regulation scheme from the three-dimensional polyline sequence of the channel bottom of the channel regulation scheme;

[0066] Step 5-6: Use ArcGIS raster creation tools to convert the waterway regulation scheme TIN model into a waterway regulation scheme raster model;

[0067] Step 5-7: Use ArcGIS's raster Mosaic tool to merge the raster model of the waterway regulation plan with the terrain created in step 5-4. Considering that waterway regulation only involves excavation but not filling of the riverbed, the Mosaic must use the MINIMUM option.

[0068] Step 6: Using the secondary development function of ArcGIS, export the river network model data from the ArcGIS platform into a text format and spatial information file format that meets the import requirements of Mike software.

[0069] Step 7: Use the hydrodynamic modeling platform DHI Mike to import the spatial information file of the river network one-dimensional fine GIS model, set the additional information for model operation, and complete the creation of a complete one-dimensional model of the river network channel ( Figure 7 ) and complete the hydraulic simulation process.

[0070] When the hydrodynamic platform imports a one-dimensional model, the one-dimensional model includes the import of corresponding files or information generated by the river network topology model, river section model, address model and cross-section model in the GIS fine model.

[0071] Step 8: For the river sections that need local fine modeling, use the research boundary to intercept and export the model, use the hydrodynamic modeling platform DHI Mike to import the information, use the results of the one-dimensional model hydraulic simulation to set the model operation additional information, and complete the creation of a complete two-dimensional or three-dimensional model of the river network channel in each dimension ( Figure 8 ).

[0072] The two-dimensional and three-dimensional models include the import of corresponding files or information generated by the GIS boundary model, GIS elevation grid model, address model in the GIS structure model, and longitudinal section model.

[0073] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A river network hydraulic calculation modeling method based on BIM and GIS platform, It is characterized in that The following steps are involved: Step 1: River network BIM model construction: Based on the topographic surveying data, use the BIM engineering design platform Civil 3D to build the terrain surface model, main and tributary flow direction model, embankment model, river network section and river-blocking building location model of the corresponding river network area; Step 2: Construction of BIM model of waterway regulation scheme: Based on the waterway regulation design data, use the BIM engineering design platform Civil 3d to build the regulation model of the relevant regulated river section; Step 3: Construction of the BIM model of the river-blocking structure: Based on the engineering design data, use the BIM engineering design platform Revit to build the corresponding river-blocking structure model, including the bridge model, culvert model, and sluice gate model; Step 4: Convert the river network BIM model to a GIS model: Use the data interoperability function of the GIS platform ArcGIS to import the BIM model and convert it into the initial GIS model of the river network on the ArcGIS platform; Step 5: GIS model processing: Using ArcGIS data processing functions, edit and convert the initial GIS model of the river network on the ArcGIS platform to a high-precision river network fine GIS model; In step 5, the GIS element editing function of the GIS platform is used to debug and refine the initial GIS model of the river network, including: Step 5-1: Use ArcGIS's geometric feature editing tools to eliminate the discontinuities between river sections and establish an interconnected river network topology. At the same time, use the polyline encryption function to smooth the river network lines to make them more consistent with the natural characteristics of the river. Step 5-2: Use ArcGIS spatial feature data editing tools to delete abnormal points on the river section elements and delete the section that exceeds the embankment; Step 5-3: Use ArcGIS spatial feature data editing tools to extract the obstruction of navigation on the river channel. The new feature is stored in the GIS fine model, and the attribute is set as the inner boundary model; Step 5-4: Use ArcGIS TIN and raster data editing tools to create elevation TIN models and raster models using elevation scatter points; use the raster data clipping function to clip data outside the model boundary; create a local elevation raster model of the structure based on the structure model, and use the raster fusion function to combine the local terrain with the overall terrain; Under the condition that there is a regulation plan for the original river channel, after importing it into the GIS platform to become a GIS waterway regulation model, it is necessary to merge it with the river channel raster data according to the following steps; Step 5-5: Use ArcGIS TIN creation tool to create a TIN model of the channel regulation scheme from the three-dimensional polyline sequence of the channel bottom of the channel regulation scheme; Step 5-6: Use ArcGIS raster creation tools to convert the waterway regulation scheme TIN model into a waterway regulation scheme raster model; Step 5-7: Use ArcGIS's raster Mosaic tool to merge the raster model of the waterway regulation plan with the terrain created in step 5-4. Considering the fact that waterway regulation only cuts but does not fill the riverbed, the Mosaic must use the MINIMUM option; Step 6: GIS model export: Use ArcGIS data export function to export the GIS models of river network dimensions on ArcGIS platform and process them into GIS models of river network dimensions in spatial information file format and text format; Step 7: Construction of one-dimensional hydrodynamic model: Use the hydrodynamic modeling platform DHI Mike to import the spatial information file of the one-dimensional fine GIS model of the river network, set additional information for model operation, complete the construction of the one-dimensional model of the river network, and complete the hydraulic simulation process; Step 8: For river sections that require local fine modeling, use the research boundary to intercept and export the model, use the results of the one-dimensional model hydraulic simulation to set additional information for model operation, and complete the creation of a complete two-dimensional or three-dimensional model of the river network and waterway.

2. According to the river network hydraulic calculation modeling method based on BIM and GIS platform described in claim 1, It is characterized in that In the step 1, Civil 3d, a BIM engineering design platform, is used to use topographic surveying and mapping data to create a topographic surface model, which includes a surface boundary; an elevation analysis is performed on the surface, and with the assistance of the topographic elevation background, the center lines of the main and tributary rivers of the river network and the levee lines are made to establish a river network direction model and a levee model; a sampling line is created, and terrain sampling is performed along the river network direction to obtain a river section model; according to the river pile number where the river-blocking structure is located, a section corresponding to the pile number is created to obtain a structure location model.

3. According to the river network hydraulic calculation modeling method based on BIM and GIS platform described in claim 1, It is characterized in that In step 2, the regulation scheme model generated by the BIM engineering design platform Civil 3d mainly includes the longitudinal section and the cross section of the regulated river section. The above data can be combined into a series of three-dimensional multi-segment line combinations to form the channel bottom contour line, that is, the channel regulation model.

4. According to the river network hydraulic calculation modeling method based on BIM and GIS platform described in claim 1, It is characterized in that In step 3, the structural model of the dam structure includes the main dimensions of the structure, and the coordinates of each control point of the structure use the coordinates of the location of the structure.

5. According to the river network hydraulic calculation modeling method based on BIM and GIS platform as described in claim 1, It is characterized in that In step 7, when the hydrodynamic platform imports the one-dimensional model, the one-dimensional model includes the import of corresponding files or information generated by the river network topology model, the river section model, the address model and the cross-section model in the GIS fine model.

6. According to the river network hydraulic calculation modeling method based on BIM and GIS platform as described in claim 1, It is characterized in that In step 8, the two-dimensional and three-dimensional models include the import of corresponding files or information generated by the address model and longitudinal section model in the GIS boundary model, GIS elevation grid model and GIS structure model.

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