Water resource management method and system based on three-dimensional digital sand table

Abstract

The invention discloses a water resource management method and system based on a three-dimensional digital sand table, and the method comprises the steps: obtaining a target water resource management region, and constructing a terrain model of the target water resource management region based on a DEM and a DOM; eliminating topographic data beyond a preset distance from the watershed range in the topographic model through topographic processing software, and retaining the topographic data of the remaining part; utilizing a hydrodynamic modeling platform to construct a river channel production and confluence model of the target water resource management area, and importing the river channel production and confluence model into the terrain model; configuring related parameters after the river channel runoff and convergence model is imported so as to complete establishment of runoff and convergence data in the terrain model; and obtaining a drainage basin water level calculation result in a target time range, and performing associated presentation on the drainage basin water level calculation result based on the runoff and confluence data established in the terrain model. According to the method, the water level fluctuation and flood routing process and the like can be displayed, and drainage basin production decision making, commanding and dispatching are assisted.

Description

Technical Field

[0001] The present application relates to the technical field of hydrodynamic applications, and in particular to a water resource management method and system based on a three-dimensional digital sandbox. Background Art

[0002] The three-dimensional digital sandbox is a widely used and mature technology, but different technical scenarios use different technical routes, including three-dimensional geographic information, VR, holographic projection and other technical routes. The hydrodynamic model is generally constructed based on professional hydrodynamic theoretical formulas such as the water flow energy equation, which is used to calculate and simulate the movement of rivers, seas and lakes. At present, the construction of hydrodynamic models, especially flood models, is often based on low-precision topographic maps, which makes the model accuracy and display effect insufficient, and cannot give people an immersive and real feeling and experience. Summary of the invention

[0003] The embodiments of the present application provide a water resource management method and system based on a three-dimensional digital sandbox, which is used to display water level fluctuations, flood evolution processes, etc., to assist in basin production decision-making and command and dispatch.

[0004] The present application embodiment proposes a water resources management method based on a three-dimensional digital sand table, including:

[0005] Acquire a target water resource management area, and construct a terrain model of the target water resource management area based on a digital elevation model (DEM) and a digital orthophoto (DOM);

[0006] Based on the watershed scope of the target water resources management area, terrain data outside a preset distance outside the watershed scope in the terrain model are eliminated through terrain processing software, and the remaining terrain data are retained;

[0007] Using a hydrodynamic modeling platform to construct a runoff sub-model for the target water resource management area, the runoff sub-model includes a conventional non-flood season runoff sub-model and a flood season flood runoff model, and importing the runoff model into the terrain model;

[0008] Configuring relevant parameters of the runoff generation and convergence model after it is imported into the terrain model, so as to complete the establishment of runoff generation and convergence data in the terrain model;

[0009] The water level calculation results of the watershed within the target time range are obtained, and the water level calculation results of the watershed are presented in association with the runoff data established in the terrain model.

[0010] Optionally, obtaining a target water resource management area and constructing a terrain model of the target water resource management area based on a digital elevation model (DEM) and a digital orthophoto (DOM) includes:

[0011] Use drone oblique photography to obtain aerial photos and measurement control points of the target water resource management area;

[0012] A terrain model of the target water resource management area is constructed based on the aerial photos and the survey control points and based on a digital elevation model (DEM) and a digital orthophoto (DOM).

[0013] Optionally, based on the watershed scope of the target water resource management area, removing terrain data outside a preset distance outside the watershed scope in the terrain model by terrain processing software includes:

[0014] Taking the determined watershed range of the target water resources management area as the horizontal plane reference, terrain data outside the preset distance above the conventional water level on both sides of the watershed in the terrain model are eliminated through terrain processing software.

[0015] Optionally, after constructing the flow generation and convergence sub-model of the target water resource management area using the hydrodynamic modeling platform, the method further includes converting the remaining terrain data into elevation scattered point data.

[0016] Optionally, configuring the relevant parameters after the runoff generation and runoff sub-model is imported to complete the establishment of runoff generation and runoff data in the terrain model includes: dividing the terrain data into terrain grids according to accuracy requirements, and interpolating based on the converted high-level scattered data to complete the establishment of runoff generation and runoff data in the terrain model.

[0017] Optionally, the calculation results of the watershed water level within the target time range include:

[0018] The flood forecasting model is used to convert the flood calculation results at each moment into the shp file format used by the standard 3D GIS;

[0019] The start and end times and the start and end attributes within the target time range are screened according to the display requirements of the front end, wherein the start and end times are determined as the maximum water level moments within the target time range, and the corresponding water level, flow rate, and flow velocity are used as the start and end attributes;

[0020] Interpolation is performed based on the filtered start and end times and the elevation scatter points associated with the start and end attributes to establish runoff data within a target time range in the terrain model.

[0021] Optionally, presenting the calculation result of the watershed water level in association with the runoff data established in the terrain model includes:

[0022] The runoff generation and convergence data within the target time range established in the terrain model are compressed to compress the runoff generation and convergence data within the target time range into an image file in an animation format, and the runoff generation and convergence data are displayed based on the image file in the animation format.

[0023] An embodiment of the present application also proposes a water resource management system based on a three-dimensional digital sandbox, including a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the steps of the water resource management method based on the three-dimensional digital sandbox as described above are implemented.

[0024] The method of the embodiment of the present application can display the water level fluctuation, flood evolution process, etc. of the target water resource basin, and assist in basin production decision-making, command and dispatch.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 The basic process diagram of the water resources management method based on the three-dimensional digital sand table of this embodiment is shown;

[0028] Figure 2 This is a demonstration example of the water resource management method based on the three-dimensional digital sandbox of this embodiment. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] The present application embodiment proposes a water resources management method based on a three-dimensional digital sand table, such as Figure 1 As shown, the following steps are included:

[0031] In step S101, a target water resource management area is obtained, and a terrain model of the target water resource management area is constructed based on a digital elevation model (DEM) and a digital orthophoto (DOM). In some specific examples, obtaining a target water resource management area, and constructing a terrain model of the target water resource management area based on a digital elevation model (DEM) and a digital orthophoto (DOM) includes:

[0032] Use drone oblique photography to obtain aerial photos and measurement control points of the target water resource management area;

[0033] Based on the aerial photos and the measurement control points, the terrain model of the target water resource management area is constructed based on the digital elevation model (DEM) and the digital orthophoto (DOM). For example, L2 data such as buildings, water areas, river sections, and underwater terrain are prepared for the key research areas, and the scene baseplate of the area is generated through the overall terrain uniform color mapping lighting, rendering optimization, and multiple levels of detail processing.

[0034] In step S102, based on the watershed range of the target water resource management area, terrain data outside the preset distance outside the watershed range in the terrain model is eliminated through terrain processing software, and the remaining terrain data is retained. The embodiment of the present application provides scene management and scene construction capabilities based on the scene base plate terrain. By eliminating terrain data outside the preset distance above the watershed range in the terrain model, the amount of model rendering data can be reduced and data processing efficiency can be improved.

[0035] In step S103, a runoff model of the target water resource management area is constructed using a hydrodynamic modeling platform, wherein the runoff model includes a conventional non-flood season runoff sub-model and a flood season flood runoff sub-model, and the runoff model is imported into the terrain model.

[0036] In step S104, the parameters of the runoff model after importing the terrain model are configured to complete the establishment of runoff data in the terrain model. Based on this, basic runoff data can be established, for example, in the normal water period, it can be directly presented based on the runoff data.

[0037] For the real-time presentation scenario, in step S105, the watershed water level calculation results within the target time range are obtained, and the watershed water level calculation results are presented in association with the runoff data established in the terrain model.

[0038] In some embodiments, based on the watershed range of the target water resource management area, removing terrain data outside a preset distance above the watershed range in the terrain model by terrain processing software includes:

[0039] Taking the determined watershed range of the target water resources management area as the horizontal plane reference, terrain data outside the preset distance above the watershed range on both sides of the watershed in the terrain model are eliminated through terrain processing software.

[0040] In some embodiments, after constructing the runoff generation and convergence sub-model of the target water resource management area using the hydrodynamic modeling platform, the method further includes converting the remaining terrain data into elevation scattered point data.

[0041] In some embodiments, the relevant parameters of the runoff generation and runoff sub-model after import are configured to complete the establishment of runoff generation and runoff data in the terrain model, including: dividing the terrain data into terrain grids according to accuracy requirements, and interpolating based on the converted high-level scattered data to complete the establishment of runoff generation and runoff data in the terrain model, such as setting various parameters matching the grid length (such as calculation time step, etc.) and boundary conditions to complete the construction and calculation of the water flow model.

[0042] In some embodiments, obtaining the calculation result of the water level of the watershed within the target time range includes:

[0043] The flood calculation results at each moment are converted into the shp file format used by the standard 3D GIS through the flood forecasting model, thereby obtaining a series of shp result layer files. Each shp result layer file contains the same vector triangle surface elements, and each vector triangle surface element has various hydraulic element attribute fields such as water level and water depth.

[0044] The start and end times and start and end attributes within the target time range are screened according to the display requirements of the front end, wherein the start and end times are determined as the maximum water level moments within the target time range, and the corresponding water level, flow rate, and flow velocity are used as the start and end attributes.

[0045] Interpolation is performed based on the elevation scatter points associated with the filtered start and end times and the start and end attributes to establish runoff data within a target time range in the terrain model, and interpolation is performed according to the aforementioned processing method.

[0046] In some embodiments, presenting the calculation result of the watershed water level based on the runoff data established in the terrain model in association includes:

[0047] like Figure 2 As shown, for example, cross-section processing can be further performed on the dam display area, and related parameters can be presented in association. For data that other users are interested in, compression processing can be performed based on the runoff data within a target time range established in the terrain model, so as to compress the runoff data within the target time range into an image file in an animation format, and display it based on the image file in the animation format.

[0048] The method of the embodiment of the present application can display the water level fluctuation, flood evolution process, etc. of the target water resource basin, and assist in basin production decision-making, command and dispatch.

[0049] An embodiment of the present application also proposes a water resource management system based on a three-dimensional digital sandbox, including a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the steps of the water resource management method based on the three-dimensional digital sandbox as described above are implemented.

[0050] In addition, although exemplary embodiments have been described herein, the scope includes any and all embodiments based on the present disclosure with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. It is not limited to the examples described in this specification or during the implementation of this application, and its examples will be interpreted as non-exclusive.

[0051] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, those of ordinary skill in the art may use other embodiments when reading the above description.

[0052] The above embodiments are merely exemplary embodiments of the present disclosure. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present disclosure, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A water resources management method based on a three-dimensional digital sandbox, characterized in that: include: Acquire a target water resource management area, and construct a terrain model of the target water resource management area based on a digital elevation model (DEM) and a digital orthophoto (DOM); Based on the watershed scope of the target water resources management area, terrain data outside a preset distance outside the watershed scope in the terrain model are eliminated through terrain processing software, and the remaining terrain data are retained; A runoff model for the target water resource management area is constructed using a hydrodynamic modeling platform, wherein the runoff model includes a conventional non-flood season runoff model and a flood season flood runoff model, and the runoff model is imported into the terrain model; Configuring relevant parameters of the runoff generation and convergence model after it is imported into the terrain model, so as to complete the establishment of runoff generation and convergence data in the terrain model; The water level calculation results of the watershed within the target time range are obtained, and the water level calculation results of the watershed are presented in association with the runoff data established in the terrain model.

2. The water resource management method based on the three-dimensional digital sand table according to claim 1, characterized in that: Obtaining a target water resource management area and constructing a terrain model of the target water resource management area based on a digital elevation model (DEM) and a digital orthophoto (DOM) includes: Use drone oblique photography to obtain aerial photos and measurement control points of the target water resource management area; A terrain model of the target water resource management area is constructed based on the aerial photos and the survey control points and based on a digital elevation model (DEM) and a digital orthophoto (DOM).

3. The water resource management method based on the three-dimensional digital sandbox according to claim 2, characterized in that: Based on the watershed scope of the target water resources management area, terrain data outside the preset distance outside the watershed scope in the terrain model are eliminated by terrain processing software, including: Taking the determined watershed range of the target water resources management area as the horizontal plane reference, terrain data outside the preset distance above the conventional water level on both sides of the watershed in the terrain model are eliminated through terrain processing software.

4. The water resource management method based on the three-dimensional digital sand table according to claim 3 is characterized in that: After constructing the runoff model of the target water resource management area using the hydrodynamic modeling platform, the method also includes converting the remaining terrain data into elevation scattered point data.

5. The water resource management method based on the three-dimensional digital sandbox according to claim 4, characterized in that: Configuring the relevant parameters of the runoff generation and runoff model after importing it into the terrain model to complete the establishment of runoff generation and runoff data in the terrain model includes: dividing the terrain data of the remaining part into terrain grids according to the accuracy requirements, and interpolating based on the converted high-level scattered data to complete the establishment of runoff generation and runoff data in the terrain model.

6. The water resource management method based on the three-dimensional digital sandbox according to claim 5, characterized in that: The calculation results of the water level in the target time range include: The flood forecasting model is used to convert the flood calculation results at each moment into the shp file format used by the standard 3D GIS; The start and end times and the start and end attributes within the target time range are screened according to the display requirements of the front end, wherein the start and end times are determined as the maximum water level moments within the target time range, and the corresponding water level, flow rate, and flow velocity are used as the start and end attributes; Interpolation is performed based on the filtered start and end times and the elevation scatter points associated with the start and end attributes to establish runoff data within a target time range in the terrain model.

7. The water resource management method based on the three-dimensional digital sandbox according to claim 6, characterized in that: The associated presentation of the basin water level calculation results based on the runoff data established in the terrain model includes: The runoff generation and convergence data within the target time range established in the terrain model are compressed to compress the runoff generation and convergence data within the target time range into an image file in an animation format, and the runoff generation and convergence data are displayed based on the image file in the animation format.

8. A water resources management system based on a three-dimensional digital sandbox, characterized in that: It comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the steps of the water resources management method based on the three-dimensional digital sandbox as described in any one of claims 1 to 7 are implemented.

Images