A water purification method and display system suitable for urban and rural landscape shaping

Abstract

This invention belongs to the field of urban planning and discloses a water purification method and presentation system suitable for urban and rural landscape shaping. The presentation system includes the following modules: a multi-source data acquisition module; an urban and rural topographic and hydrological digital sand table construction module; an island-type point water connectivity module; a flow control area identification module; a flow control area optimization module; and a self-purification system optimization solution output module. This invention utilizes a water self-purification system optimization method for urban and rural landscape shaping to construct a water circulation network, thereby improving water self-purification capacity. This method achieves organic connectivity and efficient exchange of water systems, enriching urban landscapes and enhancing regional ecological diversity. It also addresses several issues inherent in traditional water management, including high economic and labor costs, significant ecological impacts, and a short maintenance period for water treatment results.

Description

Technical Field

[0001] The present invention belongs to the field of urban planning, and in particular relates to a water purification method and a display system suitable for shaping urban and rural landscapes. Background Art

[0002] With the rapid development of society, water pollution is becoming increasingly serious. Urban population expansion, irrational lifestyles and production patterns, and inadequate ecological management have all caused varying degrees of damage to the aquatic environment. Traditional methods for addressing water pollution include sediment cleaning, increased water diversion, mechanical decontamination, and various biochemical agents. However, these passive approaches often come with high costs and multiple impacts on the ecological environment.

[0003] Therefore, water pollution control often requires the use of ecological measures to improve the water environment. Currently, water self-purification has become a research hotspot in response to water cycle imbalances and water resource pollution. Research has shown that water volume, flow rate, and river curvature are three key factors influencing water self-purification capacity. Summary of the Invention

[0004] Firstly, in view of the deficiencies of the prior art, the purpose of the present invention is to provide a water purification method suitable for urban and rural landscape shaping, which realizes the restoration of water circulation and enhancement of water self-purification capacity based on landscape shaping by optimizing and reshaping urban and rural landscapes.

[0005] The technical solution adopted in the present invention is:

[0006] A water purification method suitable for urban and rural landscape shaping identifies water bodies in a region, including point water and linear water. If a point water body is not connected to any other point water bodies through linear water or is only connected to point water bodies in one direction, the point water body is defined as an island point water body.

[0007] Construct new linear water to connect the isolated island-type point water with the point water upstream and the point water downstream of the isolated island-type point water.

[0008] In some disclosures, the flow rate of the water body is changed by changing the slope of the terrain through which the water body flows and / or changing the curvature of the water body;

[0009] When the slope of the terrain through which the water flows is greater than 3 degrees, the curvature of the water body is increased to 1.3 degrees < S < 3.0 degrees;

[0010] If the slope of the terrain through which the water flows is less than 3 degrees, the slope of the terrain through which the water flows is increased to more than 3 degrees;

[0011] Until the water flow rate of the water body reaches the target value.

[0012] Secondly, in response to the shortcomings of the existing technology, the purpose of the present invention is to provide a water body display system suitable for urban and rural landscape shaping, which realizes the restoration of water body circulation and enhancement of water body self-purification capacity based on landscape shaping by optimizing and reshaping the terrain.

[0013] The technical solution adopted in the present invention is:

[0014] A water body display system suitable for shaping urban and rural landscapes, the display system comprising:

[0015] Urban and rural terrain and hydrology digital sand table construction module: This module inputs the catchment runoff network dataset and the current hydrological dataset into the geographic information platform, unifies the coordinate conversion format, and integrates it into the surface water simulation platform. Through spatial alignment and data processing, it constructs an urban and rural terrain and hydrology digital sand table.

[0016] Island-type point water connection module: determines whether it is an island-type point water based on the connection status of the point water with the surrounding water bodies, and connects the point water judged to be an island type with the point water upstream and downstream based on the direction and shape of the catchment runoff network;

[0017] Water flow control area identification module: through the cross-validation of the actual and predicted water flow velocity values, the area with insufficient water kinetic energy is marked as the water flow velocity control area;

[0018] Water flow control area optimization module: For the water flow rate control area, when the terrain slope s through which the water body flows is greater than 3 degrees, the curvature of the water body shape is increased to 1.3 degrees < S < 3.0 degrees. When the terrain slope s through which the water body flows is less than 3 degrees, the terrain slope through which the water body flows is increased to more than 3 degrees; until the water flow rate of the water body reaches the target value;

[0019] Output module: outputs final urban and rural terrain hydrological data, real-time parameters of water flow velocity and visualization of water body layout.

[0020] In some disclosures, a multi-source data acquisition module is included, which collects water runoff data and current hydrological data;

[0021] Catchment runoff data include topographic data, catchment river network and catchment direction;

[0022] The current hydrological data include water level, water flow rate and water morphology type.

[0023] In some publications, the criteria for determining isolated point water are:

[0024] If there is a point-like water that is not connected to any other point-like water through line-like water or is only connected to point-like water in one direction, then this point-like water is set as an island-type point-like water.

[0025] In some disclosures, if the water flow rate of the water body is less than 3 m / h, it is determined that the kinetic energy of the water body is insufficient.

[0026] In some disclosures, visualization of the layout of a body of water includes a full-scale display in a 3D holographic projection.

[0027] Beneficial effects of the present invention:

[0028] 1. The present invention achieves ecological sustainability in water pollution control. It constructs a water circulation system based on the catchment runoff network, reshapes the landscape from two aspects: terrain slope and river curvature, and improves the overall self-purification efficiency of the water system, thereby providing a sustainable water self-purification system that saves resources and energy.

[0029] 2. The display system of the present invention realizes the real-time adjustment of the optimization plan and the real-time display of the adjusted plan. Planners can adjust the plan in real time by adjusting parameters, which enhances the interactivity between planners and the digital sandbox of the plan, and instantly displays the adjusted holographic sandbox model, thereby improving the display effect of the plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 is a flow chart of the overall method of an embodiment of the present invention;

[0032] Figure 2 A diagram of a water flow rate control area according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram showing the interactive display of the water self-purification system optimization solution according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0035] For the convenience of demonstration, the technical solution in the embodiment of the present invention will be clearly and completely described below in combination with the self-purification water system case of the demonstration plot and the accompanying drawings.

[0036] like Figure 1 As shown, for a water purification method or water display system suitable for urban and rural landscape shaping, this application includes operations of the following modules:

[0037] S1. Multi-source data collection:

[0038] S2. Construction of urban and rural topography and hydrology digital sand table;

[0039] S3, island-type point-like water connectivity;

[0040] S4, identification of water flow control areas;

[0041] S5, water flow control area optimization;

[0042] S6. Output of optimization plan for water self-purification system.

[0043] S1. Multi-source data acquisition module: obtain digital elevation model data and remote sensing data through the geographic data cloud and the national geographic information resource directory service system, and generate water runoff data and current hydrological data through data processing.

[0044] The S1 also includes two steps S1.1 and S1.2:

[0045] S1.1 uses a geospatial data cloud platform to obtain high-precision digital elevation model data with a horizontal and vertical accuracy of 5 meters. This data is then collated using oblique photography data collected by a mapping drone. River networks and drainage directions are extracted through depression-filling and the D8 algorithm to form a drainage runoff dataset.

[0046] The water catchment runoff dataset includes: topographic data, water catchment river network, and water catchment direction; wherein the water catchment river network specifically refers to: a water body runoff network within a planning range obtained by calculation based on topographic data.

[0047] S1.2 Obtain remote sensing data within the study area through the National Geographic Information Resource Directory Service System and use image enhancement-assisted maximum likelihood classification to extract water bodies. Identify the water body type based on the size, shape, and texture of the extracted water bodies. Establish water monitoring points every 50 meters within the planning area and supplement hydrological information with echo sounders and rotor current meters to form a current hydrological dataset.

[0048] The current hydrological data set includes: water level, water flow velocity, and water morphology type; wherein, the water morphology type specifically refers to: based on the water morphology characteristics proposed in the "Water Landscape Design Based on Water Self-Purification in Wetland Parks", water bodies are divided into point water (maximum water surface diameter less than 200m), linear water (average water surface width less than 200m), and surface water (water surface diameter or width greater than 200m).

[0049] S2. Urban and rural terrain and hydrology digital sand table construction module: Input the watershed runoff network dataset and the current hydrological dataset into the geographic information platform, unify the coordinate conversion format and integrate it into the surface water simulation platform, and construct the terrain and hydrology digital sand table through spatial alignment and data processing.

[0050] The S2 also includes three steps: S2.1, S2.2, and S2.3.

[0051] S2.1 Input the catchment runoff network dataset and current hydrological dataset collected in step 1 into the geographic information system platform, use the projection tool to uniformly convert the coordinates of the above data into the WGS-1984 coordinate system, and store them in SHP format respectively;

[0052] S2.2 integrates the catchment runoff network dataset and the current hydrological dataset into the surface water modeling platform (Surface Water Modeling System) based on unified coordinates, forming a spatial alignment on the plane. Then, the current hydrological dataset and the catchment runoff network dataset are aligned in height based on elevation information to construct a topographic hydrological digital sand table.

[0053] S2.3 pre-processes the terrain and hydrological data in the SMS platform: sets the boundary type of the river water body, reads the water depth information, establishes polygon generation grid information, sets the main control parameters, and connects to the TUFLOW FV numerical model.

[0054] S3. Island-type point water connection module: Determine whether it is an island-type point water based on the connection status of the point water and the surrounding water bodies, and connect the point water determined to be an island type with the point water upstream and downstream based on the direction and shape of the catchment runoff network.

[0055] The S3 also includes two steps S3.1 and S3.2.

[0056] S3.1 In the constructed topographic hydrological digital sandbox, determine whether the point water is an island-type point water according to the direction of runoff. If there is linear water connecting this point water with other point waters (two or more), skip it; if the point water is not connected to other point waters or is only connected to point waters in one direction, it is determined to be an island-type point water.

[0057] S3.2 extracts the point water judged to be isolated island type into a new layer and overlays the watershed runoff network data. Based on the direction and shape of the watershed runoff network, extracts the center line and creates a new linear water with a width of 10m to connect the isolated island type point water with the point water upstream and downstream.

[0058] S4. Water flow control area identification module: Adjust the TUFLOW FV model parameters to obtain the water flow velocity simulation results of the water body. Through cross-validation of the actual and predicted water flow velocity values until the error is controlled within 0.05, the areas with insufficient water kinetic energy are marked as water flow velocity control areas.

[0059] The S4 also includes three steps: S4.1, S4.2, and S4.3.

[0060] S4.1 simulates the hydrodynamic conditions in the river based on the TUFLOW FV model interface by adjusting model parameters, including stability limits, global horizontal eddy viscosity, riverbed material, riverbed roughness, initial hydrology, and boundary conditions, thereby obtaining water velocity simulation results for the entire water body.

[0061] S4.2 extracts the water flow velocity value of the actual water body at the water body monitoring point and the water flow velocity value of the predicted water body, and cross-validates the error of the above two values. If the error is within 0.05, it means that the simulation effect is qualified, and the water flow velocity simulation result of the water body is output; if the error is greater than 0.05, the model parameters are reset and simulated again until the cross-validation error is controlled within 0.05, and the water flow velocity simulation result of the water body is output.

[0062] S4.3 Mark areas of the water body where kinetic energy is insufficient as water velocity control areas.

[0063] The areas of insufficient water kinetic energy are defined as follows: According to the "Preliminary Study on the Relationship between River Hydrological Factors and Self-Purification Capacity," when the flow rate is less than 3 m / h, the water body's kinetic energy is insufficient and its self-purification capacity is weak. Therefore, we screened the areas with a flow rate less than 3 m / h in the simulation results, created a new layer as the water flow rate control area, and segmented the linear water area between the two surface water areas.

[0064] S5. Water flow control area optimization module: The terrain undulation of the water flow rate control area segment is obtained through the Focal function and difference operation. When the terrain slope s through which the water body flows is greater than 3 degrees, the curvature of the water body shape is increased to 1.3<S<3.0. When the terrain slope s through which the water body flows is less than 3 degrees, the increase or decrease of the earthwork volume is controlled to increase the terrain slope through which the water body flows to more than 3 degrees.

[0065] The increase in slope can increase the flow rate of water bodies, and the curvature of the water body can reduce the flow rate of water bodies.

[0066] like Figure 2 As shown, the water flow rate control area of Chenzhuang water network is marked.

[0067] The S5 also includes four steps: S5.1, S5.2, S5.3, and S5.4.

[0068] S5.1 Use the Focal function in the terrain and hydrology sandbox to calculate the maximum and minimum elevation values of the DEM, and then perform a difference operation on the maximum and minimum elevation values to obtain the terrain relief of the water flow control area. If the slope s is less than 3 degrees, the terrain is considered flat. The calculation formula for terrain relief is as follows:

[0069] R=H max -H min

[0070] S5.2 If the terrain is judged to be s>3 degrees, the linear water body in the water flow rate control area shall be transformed into a more winding shape, and reasonable overall planning and combination design shall be carried out in combination with other forms of water bodies to increase the curvature of the water body shape to 1.3<S<3.0.

[0071] S5.3 If it is determined that the terrain s is less than 3 degrees, the terrain undulation in the water flow rate control area shall be controlled by increasing or decreasing the amount of earthwork, and the slope of the terrain through which the water body flows shall be increased to more than 3 degrees.

[0072] The calculation formula for the river curvature is: (Lt is the length of the river measured along the central axis of the river; Lo is the straight-line distance between the upstream and downstream sections)

[0073] S5.4 Run the optimized water flow control area in the TUFLOW FV model segment, output the real-time change data of water surface elevation and average water flow velocity, and the global maximum and minimum value files of the model run corresponding to each output variable. If the water flow velocity of the water body is above 3m / h, output the solution. If the water flow velocity of the water body is below 3m / h, continue to optimize the curvature of the water body or the terrain. Repeat step 6 until the water flow velocity simulation results of all coded segments are above 3m / h.

[0074] S6, Water Self-Purification System Optimization Solution Output Module: The final project report drawings are output, and the shp data is input into the 3D holographic projection for full display.

[0075] The S6 also includes a step S6.1, which ultimately outputs the shp data after integrating the topographic hydrological data and the optimization adjustment plan, and at the same time outputs the real-time parameter report of the water body flow rate and the water body layout visualization map to form the engineering report drawing and print it. The shp data is input into the 3D holographic projection for full display. The equipment includes a VR panoramic display stand equipped with a water body flow rate simulation system and 3D tracking glasses. Planners can adjust the parameters for autonomous interactive control and select the interface display content, such as Figure 3 shown.

[0076] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0077] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present disclosure. Various changes and improvements may be made to the present disclosure without departing from the spirit and scope of the present disclosure, and such changes and improvements fall within the scope of the present disclosure as claimed.

Claims

1. A water body display system suitable for urban and rural landscape shaping, characterized by: The display system includes: Urban and rural terrain and hydrology digital sand table construction module: This module inputs the catchment runoff network dataset and the current hydrological dataset into the geographic information platform, unifies the coordinate conversion format and integrates it into the surface water simulation platform. The terrain and hydrology digital sand table is constructed through spatial alignment and data processing. Island-type point water connection module: determines whether it is an island-type point water based on the connection status of the point water with the surrounding water bodies, and connects the point water judged to be an island type with the point water upstream and downstream based on the direction and shape of the catchment runoff network; Water flow control area identification module: By cross-validating the actual and predicted water flow velocity values, areas with insufficient water kinetic energy are marked as water flow control areas; the details are as follows: S4.

1. Using the TUFLOW FV model interface, adjust model parameters, including stability limits, global horizontal vortex viscosity, riverbed material, riverbed roughness, initial hydrology, and boundary conditions, to simulate the hydrodynamic conditions in the river, thereby obtaining flow velocity simulation results for the entire water body. S4.

2. Extract the actual water velocity value and the predicted water velocity value at the water monitoring point, and perform a cross-validation error on the two values. If the error is within 0.05, the simulation is considered satisfactory, and the water velocity simulation result of the water body is output. If the error is greater than 0.05, reset the model parameters and simulate again until the cross-validation error is within 0.05, and then output the water velocity simulation result of the water body. S4.

3. Mark areas with insufficient water kinetic energy as water velocity control areas; Water flow control area optimization module: For the water flow rate control area, when the terrain slope s through which the water body flows is greater than 3 degrees, the curvature of the water body shape is increased to 1.3 degrees < S < 3.0 degrees. When the terrain slope s through which the water body flows is less than 3 degrees, the terrain slope through which the water body flows is increased to more than 3 degrees; until the water flow rate of the water body reaches the target value; Output module: outputs final urban and rural terrain hydrological data, real-time parameters of water flow velocity and visualization of water body layout.

2. The water body display system suitable for urban and rural landscape shaping according to claim 1 is characterized in that: Including multi-source data acquisition module, multi-source data acquisition module: collects water runoff data and current hydrological data; Catchment runoff data include topographic data, catchment river network and catchment direction; The current hydrological data include water level, water flow rate and water morphology type.

3. The water body display system suitable for urban and rural landscape shaping according to claim 1 is characterized in that: The judgment basis for isolated point water is: If there is a point-like water that is not connected to any other point-like water through line-like water or is only connected to point-like water in one direction, then this point-like water is set as an island-type point-like water.

4. The water body display system suitable for urban and rural landscape shaping according to claim 1 is characterized in that: If the water flow rate of the water body is less than 3m / h, it is determined that the kinetic energy of the water body is insufficient.

5. The water body display system suitable for urban and rural landscape shaping according to claim 1 is characterized in that: The visualization of the water body layout includes a full-scale display in 3D holographic projection.

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