Real-time measurement method and system for sediment deposition amount

Abstract

The application provides a kind of silt deposition quantity real-time measurement method and system, the method includes constructing the initial three-dimensional model of target silt dam, initial three-dimensional model includes initial underwater topographic model;Real-time water depth data of multiple preset monitoring positions in target silt dam and real-time water level data of target silt dam are obtained, and the water bottom elevation data corresponding to each preset monitoring position is determined according to real-time water level data and each real-time water depth data;According to the contour boundary corresponding to real-time water level data in initial three-dimensional model, the real-time water surface boundary line is determined;Based on real-time water surface boundary line and each water bottom elevation data, the real-time underwater topography of target silt dam is constructed;According to the elevation difference between real-time underwater topography and initial underwater topographic model, the real-time deposition quantity of target silt dam is determined.

Description

Technical Field

[0001] This invention relates to the field of sediment deposition measurement technology, and in particular to a real-time measurement method and system for sediment deposition. Background Technology

[0002] The sediment retention capacity of silt-retaining dams is crucial for evaluating their sediment retention benefits and potential after construction. It helps analyze the sediment reduction contribution rates of various underlying surface factors and predict future sediment inflow into rivers. Sedimentation calculation is an important basis for the design, operation, and management of silt-retaining dams, and is essential for ensuring their safe operation and improving their overall effectiveness.

[0003] Traditional methods for measuring sedimentation volume generally suffer from limitations such as long measurement cycles, difficulty in guaranteeing accuracy, and complex operation. They not only struggle to ensure real-time performance and accuracy but also require significant manpower. Furthermore, methods for estimating existing sedimentation capacity mainly include the dam height-capacity curve method, the method based on measured sediment data from hydrological stations, the method for generalizing sedimentation bodies, and the method for roughly estimating sedimentation years. These methods all have limitations in estimating existing sedimentation capacity. For example, the dam height-capacity curve method is significantly affected by missing or incomplete design documents; the method based on measured sediment data from hydrological stations is affected by incomplete long-term measured data from hydrological stations and differences in control areas; the method for generalizing sedimentation bodies is difficult to accurately generalize due to complex topography and irregular sedimentation bodies, leading to large estimation errors; and the method for roughly estimating sedimentation years may suffer from insufficient accuracy due to changes in vegetation conditions in the target area. Therefore, existing methods generally suffer from problems such as long measurement cycles, difficulty in guaranteeing accuracy, complex operation, and insufficient real-time performance. Summary of the Invention

[0004] This invention provides a method and system for real-time measurement of sediment deposition, which solves the defects of long measurement cycle and insufficient real-time performance in the existing technology.

[0005] This invention provides a method for real-time measurement of sediment deposition, comprising: constructing an initial three-dimensional model of a target silt-retaining dam, the initial three-dimensional model including an initial underwater topography model; acquiring real-time water depth data and real-time water level data of the target silt-retaining dam at multiple preset monitoring locations, and determining the underwater elevation data corresponding to each preset monitoring location based on the real-time water level data and the real-time water depth data; determining a real-time water surface boundary line based on the contour boundaries in the initial three-dimensional model corresponding to the real-time water level data; constructing the real-time underwater topography of the target silt-retaining dam based on the real-time water surface boundary line and the underwater elevation data; and determining the real-time sediment deposition of the target silt-retaining dam based on the elevation difference between the real-time underwater topography and the initial underwater topography model.

[0006] According to the real-time measurement method for sediment deposition provided by the present invention, the initial three-dimensional model further includes an initial surface topographic model; the construction of the initial three-dimensional model of the target silt-retaining dam includes: acquiring three-dimensional data of the surface area and the underwater area of ​​the target silt-retaining dam; constructing the initial surface topographic model based on the surface area three-dimensional data, and constructing the initial underwater topographic model based on the underwater area three-dimensional data; registering the initial surface topographic model and the initial underwater topographic model to construct the initial three-dimensional model.

[0007] According to the real-time sediment deposition measurement method provided by the present invention, the construction of the real-time underwater topography of the target silt-retaining dam includes: determining the planar boundary range of the real-time underwater topography based on the real-time water surface boundary line; mapping each of the underwater elevation data to the planar boundary range to obtain multiple elevation control points; generating a continuous underwater elevation surface within the planar boundary range based on the multiple elevation control points using a smoothing algorithm; and determining the continuous underwater elevation surface as the real-time underwater topography of the target silt-retaining dam.

[0008] According to the real-time measurement method for sediment deposition provided by the present invention, the smoothing algorithm is a turbine smoothing method.

[0009] According to the real-time sediment deposition measurement method provided by the present invention, the step of determining the real-time sediment deposition of the target silt-retaining dam based on the elevation difference between the real-time underwater topography and the initial underwater topography model includes: dividing the real-time underwater topography and the initial underwater topography model into multiple sampling units; calculating the elevation difference within each sampling unit; calculating the sediment deposition volume of each unit using numerical integration or the infinitesimal method based on the elevation difference of each sampling unit; and summing the sediment deposition volumes of each sampling unit to obtain the real-time sediment deposition of the target silt-retaining dam.

[0010] According to the real-time measurement method for sediment deposition provided by the present invention, the step of determining the bottom elevation data corresponding to each preset monitoring location based on the real-time water level data and each of the real-time water depth data includes: converting the real-time water level data into real-time water level elevation; and determining the bottom elevation data corresponding to each preset monitoring location based on the difference between the real-time water level elevation and the real-time water depth data corresponding to each preset monitoring location.

[0011] This invention also provides a real-time sediment deposition measurement system, comprising: an initial model construction module for constructing an initial three-dimensional model of a target silt-retaining dam, the initial three-dimensional model including an initial underwater topography model; a real-time data acquisition module for acquiring real-time water depth data at multiple preset monitoring locations within the target silt-retaining dam and real-time water level data of the target silt-retaining dam; a bottom elevation determination module for determining bottom elevation data corresponding to each preset monitoring location based on the real-time water level data and each of the real-time water depth data; a boundary line determination module for determining a real-time water surface boundary line based on the contour boundaries in the initial three-dimensional model corresponding to the real-time water level data; a real-time topography construction module for constructing the real-time underwater topography of the target silt-retaining dam based on the real-time water surface boundary line and each of the bottom elevation data; and a sediment deposition determination module for determining the real-time sediment deposition of the target silt-retaining dam based on the elevation difference between the real-time underwater topography and the initial underwater topography model.

[0012] According to the real-time sediment deposition measurement system provided by the present invention, the initial model construction module includes a surface topography acquisition unit and an underwater topography acquisition unit; the surface topography acquisition unit includes an unmanned aerial vehicle (UAV) measurement device for acquiring three-dimensional data of the surface area of ​​the target silt-retaining dam; the underwater topography acquisition unit includes an unmanned surface vessel (USV) measurement device or an underwater depth sounding device for acquiring three-dimensional data of the underwater area of ​​the target silt-retaining dam.

[0013] According to the real-time sediment deposition measurement system provided by the present invention, the real-time data acquisition module includes a real-time water level measurement unit and multiple real-time water depth measurement units; the real-time water level measurement unit is used to measure the water level of the target silt-retaining dam; the real-time water depth measurement unit is used to measure the water depth at the preset monitoring location.

[0014] According to the real-time sediment deposition measurement system provided by the present invention, the real-time water depth measurement unit includes a floating positioning component and a depth measuring component, wherein the floating positioning component is used to ensure the stability of each depth measuring component in spatial position.

[0015] The present invention provides a method and system for real-time measurement of sediment deposition. First, an initial three-dimensional model of the target silt-retaining dam is constructed. Water level and depth data are acquired in real time at multiple preset monitoring locations. The real-time water level and depth data are converted into underwater elevation data, and then combined with the real-time water surface boundary line and underwater elevation data to generate continuous real-time underwater topography. The elevation difference between this real-time underwater topography and the initial underwater topography model is directly used to calculate the real-time sediment deposition. Because real-time monitoring data can be continuously acquired, and a continuous underwater elevation surface is generated through a smoothing algorithm, the present invention can update the sediment deposition in a short time, avoiding the problems of periodic manual measurement or reliance on long-term historical data calculations in traditional methods. Simultaneously, by utilizing a small number of preset monitoring locations combined with the constraints of the initial three-dimensional model, the entire underwater topography can be reconstructed, thereby achieving short-cycle, high-frequency real-time sediment deposition measurement, effectively solving the shortcomings of long measurement cycles and insufficient real-time performance in existing technologies. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A flowchart of the real-time measurement method for sediment deposition of the present invention is shown; Figure 2 A structural block diagram of a real-time sediment deposition measurement system according to the present invention is shown. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0019] Figure 1 A flowchart of the real-time measurement method for sediment deposition of the present invention is shown.

[0020] like Figure 1 As shown, the method includes operations S110~S150.

[0021] In operation S110, an initial three-dimensional model of the target silt-retaining dam is constructed. The initial three-dimensional model includes an initial underwater topographic model.

[0022] According to an embodiment of the present invention, an initial three-dimensional model is used to characterize the spatial topographic state of the target silt-retaining dam at the initial measurement time. Exemplarily, three-dimensional point cloud data or image reconstruction data of the above-water area of ​​the target silt-retaining dam can be acquired by an unmanned aerial vehicle (UAV), and underwater elevation data of the underwater area of ​​the target silt-retaining dam can be acquired by an unmanned surface vessel equipped with a depth sounding device. Subsequently, the three-dimensional point cloud data of the above-water area and the underwater elevation data of the underwater area are unified to the same spatial coordinate system and the same elevation datum, and the unified data are registered and surface reconstructed to obtain the initial three-dimensional model.

[0023] In operation S120, real-time water depth data and real-time water level data of multiple preset monitoring locations in the target silt-retaining dam are acquired, and the bottom elevation data corresponding to each preset monitoring location is determined based on the real-time water level data and each real-time water depth data.

[0024] According to embodiments of the present invention, the preset monitoring locations can be set according to the dam body shape of the target silt-retaining dam, the underwater topographic undulations, the distribution of historical siltation areas, and monitoring needs. They can be deployed along the dam axis, the cross-sectional direction, or in a grid pattern to improve the coverage and monitoring accuracy of underwater topographic changes of the target silt-retaining dam.

[0025] According to embodiments of the present invention, real-time water depth data can be acquired by using an unmanned surface vessel equipped with a depth sounding device, sonar device, or other underwater measuring device; real-time water level data can be acquired by a water level gauge, pressure level sensor, radar level gauge, or other water level monitoring device installed near the target silt-retaining dam.

[0026] In operation S130, the real-time water surface boundary is determined based on the contour boundaries in the initial three-dimensional model that correspond to the real-time water level data.

[0027] According to an embodiment of the present invention, the real-time water level elevation corresponding to the real-time water level data can be mapped to an initial three-dimensional model, and contour boundaries corresponding to the real-time water level elevation can be determined in the initial three-dimensional model. These contour boundaries serve as the spatial boundary between the current water surface and the target silt-retaining dam topography. Thus, the real-time water surface boundary line is obtained. By determining the real-time water surface boundary line, the accurate division between the current water area and the exposed dam area can be achieved, providing a spatial boundary basis for subsequent underwater area identification, underwater topography dynamic updates, and reservoir capacity change analysis. This avoids misclassifying above-water areas as underwater areas and improves the accuracy and reliability of underwater topography update results.

[0028] In operation S140, the real-time underwater topography of the target silt-retaining dam is constructed based on the real-time water surface boundary line and various underwater elevation data.

[0029] According to an embodiment of the present invention, since the real-time water surface boundary line can be used to determine the boundary range of the underwater area of ​​the target silt-retaining dam at the current moment, after determining the boundary range of the underwater area, the underwater area can be reconstructed by combining various bottom elevation data, thereby generating a continuous elevation distribution of the underwater area of ​​the target silt-retaining dam at the current moment, and the continuous elevation distribution is determined as the real-time underwater topography.

[0030] In operation S150, the real-time sedimentation volume of the target silt-retaining dam is determined based on the elevation difference between the real-time underwater topography and the initial underwater topography model.

[0031] According to embodiments of the present invention, under the same spatial reference, the elevation of real-time underwater topography and an initial underwater topography model can be compared to determine the elevation change of the target silt-retaining dam's underwater area at the current time relative to the initial measurement time. If the seabed elevation of the real-time underwater topography rises relative to the initial underwater topography model, the sediment deposition volume can be determined based on the spatial range and elevation change corresponding to the raised portion, and the real-time sediment deposition amount of the target silt-retaining dam can be determined based on the sediment deposition volume.

[0032] By using the above setup, an initial 3D model is used to provide a spatial benchmark. Combined with real-time water depth and water level data from multiple preset monitoring locations, a continuous real-time underwater elevation distribution is constructed. By accurately delineating the underwater area through the water surface boundary line and comparing it with the initial topographic model, the volume and amount of sediment deposition can be calculated quickly and in real time. This significantly shortens the sediment deposition measurement cycle, enables high-frequency real-time monitoring, avoids the delays caused by relying on repeated full-area mapping or periodic manual measurement in traditional methods, and ensures measurement accuracy and coverage. This provides reliable data support for the dynamic analysis of underwater topography and the assessment of reservoir capacity changes in silt-retaining dams.

[0033] In one illustrative embodiment, the initial 3D model also includes an initial water terrain model.

[0034] The process of constructing the initial 3D model of the target silt-retaining dam includes: Acquire 3D data of the above-water and underwater areas of the target silt-retaining dam.

[0035] According to embodiments of the present invention, three-dimensional data of the surface area can be obtained through means such as drones and satellite remote sensing; three-dimensional data of the underwater area can be obtained by unmanned vessels carrying depth sounding equipment, sonar equipment or other underwater measuring equipment.

[0036] An initial surface topographic model is constructed based on 3D data of the surface area, and an initial underwater topographic model is constructed based on 3D data of the underwater area.

[0037] In one example, the three-dimensional data of the water area is obtained by point cloud data acquired by a drone. The point cloud data is then processed to obtain an initial water terrain model.

[0038] In another example, underwater 3D data can be obtained using an unmanned surface vessel equipped with a sonar depth sounder or a multibeam echo sounder to acquire underwater elevation data, resulting in point clouds or elevation grids. An initial underwater terrain model can then be generated through interpolation or surface reconstruction.

[0039] The initial surface topography model and the initial underwater topography model are registered to construct the initial 3D model.

[0040] According to an embodiment of the present invention, the initial surface topography model and the initial underwater topography model can be unified into the same coordinate system and elevation datum, spatial registration and noise filtering can be performed, and a complete initial three-dimensional model can be generated using the surface reconstruction method.

[0041] In one illustrative embodiment, the process of determining the seabed elevation data corresponding to each preset monitoring location based on real-time water level data and real-time water depth data includes: Convert real-time water level data into real-time water level elevation.

[0042] According to an embodiment of the present invention, real-time water level data of the target silt-retaining dam at the current moment can be obtained first, and the measurement benchmark corresponding to the real-time water level data can be determined. If the measurement benchmark is inconsistent with the elevation benchmark corresponding to the initial three-dimensional model, benchmark conversion is performed on the real-time water level data to obtain a real-time water level elevation under the same elevation benchmark as the initial three-dimensional model. For example, the water level reading can be converted into a real-time water level elevation based on the installation elevation, zero-point elevation, or preset elevation conversion parameters of the water level measuring equipment.

[0043] The bottom elevation data corresponding to each preset monitoring location is determined based on the difference between the real-time water level elevation and the real-time water depth data corresponding to each preset monitoring location.

[0044] According to an embodiment of the present invention, for any preset monitoring location, real-time water depth data of the preset monitoring location at the current moment is obtained. The real-time water depth data is used to characterize the vertical distance between the current water surface and the corresponding bottom of the preset monitoring location. The real-time water level elevation is subtracted from the real-time water depth data corresponding to the preset monitoring location to obtain the bottom elevation data corresponding to the preset monitoring location. The above difference calculation is performed on each preset monitoring location to obtain bottom elevation data corresponding to multiple preset monitoring locations.

[0045] In one illustrative embodiment, the process of constructing the real-time underwater topography of the target silt-retaining dam includes: The planar boundary range of the real-time underwater topography is determined based on the real-time water surface boundary line.

[0046] By mapping the various underwater elevation data to the plane boundary area, multiple elevation control points are obtained.

[0047] For example, the underwater elevation data of the preset monitoring location is mapped to the corresponding location according to its spatial coordinates in the plane boundary contour to form a discrete set of elevation control points.

[0048] Based on multiple elevation control points, a continuous underwater elevation surface within the plane boundary is generated through a smoothing algorithm, and the continuous underwater elevation surface is determined as the real-time underwater topography of the target silt-retaining dam.

[0049] According to embodiments of the present invention, smoothing algorithms such as surface interpolation, spline fitting, or turbine smoothing can be used to spatially process discrete data of elevation control points, generate continuous elevation surfaces within the plane boundary range, eliminate abnormal data and measurement noise, and achieve smooth reconstruction of underwater topography.

[0050] In one illustrative embodiment, the process for determining the real-time sedimentation volume of a target silt-retaining dam based on the elevation difference between the real-time underwater topography and the initial underwater topography model includes: The real-time underwater terrain and the initial underwater terrain model are divided into multiple sampling units.

[0051] Specifically, a regular grid or an irregular triangular grid can be established in the underwater area to divide the entire underwater area into several small units, so as to perform local elevation analysis and sedimentation calculation for each unit.

[0052] Calculate the elevation difference within each sampling unit.

[0053] For example, the average bottom elevation of each sampling unit in the real-time underwater terrain and the average bottom elevation of the initial terrain model can be calculated separately, and the difference between the two can be used to obtain the elevation difference within the sampling unit.

[0054] Based on the elevation difference of each sampling unit, the sedimentation volume of each unit is calculated using numerical integration or the infinitesimal method.

[0055] According to an embodiment of the present invention, when using numerical integration, the elevation difference of the sampling units can be used as a discrete function value, and numerical integration can be performed on the spatial region corresponding to the sampling unit to obtain the accumulation volume of each unit. Numerical integration can employ the trapezoidal rule, Simpson's rule, or other suitable integration methods.

[0056] According to an embodiment of the present invention, when using the infinitesimal method, the sampling unit can be further divided into smaller infinitesimal units, and then all the infinitesimal units are accumulated to obtain the total volume of the sampling unit.

[0057] Finally, the siltation volume of each sampling unit is summed to obtain the real-time siltation volume of the target silt-retaining dam.

[0058] Embodiments of the present invention also provide a real-time measurement system for sediment deposition.

[0059] Figure 2 A structural block diagram of a real-time sediment deposition measurement system according to the present invention is shown.

[0060] like Figure 2 The real-time sediment deposition measurement system 200 shown includes an initial model construction module 210, a real-time data acquisition module 220, a bottom elevation determination module 230, a boundary line determination module 240, a real-time terrain construction module 250, and a sediment deposition determination module 260.

[0061] The initial model building module 210 is used to build an initial three-dimensional model of the target silt-retaining dam, which includes an initial underwater terrain model.

[0062] The real-time data acquisition module 220 is used to acquire real-time water depth data and real-time water level data of the target silt-retaining dam at multiple preset monitoring locations.

[0063] The underwater elevation determination module 230 is used to determine the underwater elevation data corresponding to each preset monitoring location based on real-time water level data and real-time water depth data.

[0064] The boundary line determination module 240 is used to determine the real-time water surface boundary line based on the contour boundaries corresponding to the real-time water level data in the initial three-dimensional model.

[0065] The real-time terrain construction module 250 is used to construct the real-time underwater terrain of the target silt-retaining dam based on real-time water surface boundary lines and various underwater elevation data.

[0066] The sedimentation volume determination module 260 is used to determine the real-time sedimentation volume of the target silt-retaining dam based on the elevation difference between the real-time underwater topography and the initial underwater topography model.

[0067] In one illustrative embodiment, the initial model building module 210 includes a surface terrain acquisition unit and an underwater terrain acquisition unit.

[0068] The water topography acquisition unit includes UAV surveying equipment, used to acquire three-dimensional data of the water area of ​​the target silt-retaining dam.

[0069] The underwater topographic acquisition unit includes unmanned surface vessel surveying equipment or underwater depth sounding equipment, used to acquire three-dimensional data of the underwater area of ​​the target silt-retaining dam.

[0070] In one illustrative embodiment, the real-time data acquisition module 220 includes a real-time water level measurement unit and multiple real-time water depth measurement units. The real-time water level measurement unit is used to measure the water level of the target silt-retaining dam. The real-time water depth measurement units are used to measure the water depth at preset monitoring locations.

[0071] In one illustrative embodiment, the real-time depth measurement unit includes a floating positioning component and a depth measuring component, wherein the floating positioning component is used to ensure the stability of each depth measuring component in spatial position.

[0072] For example, the floating positioning assembly may include multiple pontoon structures and be fixed in position by anchor chains.

[0073] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0074] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for real-time measurement of sediment deposition, characterized in that, include: Construct an initial three-dimensional model of the target silt-retaining dam, the initial three-dimensional model including an initial underwater topography model; The real-time water depth data of multiple preset monitoring locations in the target silt-retaining dam and the real-time water level data of the target silt-retaining dam are obtained, and the bottom elevation data corresponding to each preset monitoring location is determined based on the real-time water level data and each of the real-time water depth data. The real-time water surface boundary line is determined based on the contour boundaries in the initial three-dimensional model that correspond to the real-time water level data. Based on the real-time water surface boundary line and the underwater elevation data, the real-time underwater topography of the target silt-retaining dam is constructed. The real-time siltation volume of the target silt-retaining dam is determined based on the elevation difference between the real-time underwater topography and the initial underwater topography model.

2. The method for real-time measurement of sediment deposition according to claim 1, characterized in that, The initial three-dimensional model also includes an initial water terrain model; The initial three-dimensional model for constructing the target silt-retaining dam includes: Acquire three-dimensional data of the above-water area and the underwater area of ​​the target silt-retaining dam; The initial surface topography model is constructed based on the three-dimensional data of the surface area, and the initial underwater topography model is constructed based on the three-dimensional data of the underwater area. The initial surface topography model and the initial underwater topography model are registered to construct the initial three-dimensional model.

3. The method for real-time measurement of siltation volume according to claim 1, characterized in that, The real-time underwater topography used to construct the target silt-retaining dam includes: The planar boundary range of the real-time underwater terrain is determined based on the real-time water surface boundary line; The underwater elevation data are mapped to the plane boundary area to obtain multiple elevation control points; Based on the multiple elevation control points, a continuous underwater elevation surface within the plane boundary range is generated by a smoothing algorithm, and the continuous underwater elevation surface is determined as the real-time underwater topography of the target silt-retaining dam.

4. The method for real-time measurement of siltation volume according to claim 3, characterized in that, The smoothing algorithm is turbo smoothing.

5. The method for real-time measurement of sediment deposition according to claim 1, characterized in that, The step of determining the real-time sedimentation volume of the target silt-retaining dam based on the elevation difference between the real-time underwater topography and the initial underwater topography model includes: The real-time underwater terrain and the initial underwater terrain model are divided into multiple sampling units; Calculate the elevation difference within each sampling unit; Based on the elevation difference of each sampling unit, the sedimentation volume of each unit is calculated using numerical integration or the infinitesimal method. The siltation volume of the target silt-retaining dam is obtained by summing the siltation volume of each sampling unit.

6. The method for real-time measurement of sediment deposition according to claim 1, characterized in that, The step of determining the seabed elevation data corresponding to each preset monitoring location based on the real-time water level data and the real-time water depth data includes: Convert the real-time water level data into real-time water level elevation; The bottom elevation data corresponding to each preset monitoring location is determined based on the difference between the real-time water level elevation and the real-time water depth data corresponding to each preset monitoring location.

7. A real-time measurement system for sediment deposition, characterized in that, include: An initial model building module is used to build an initial three-dimensional model of the target silt-retaining dam, the initial three-dimensional model including an initial underwater topography model; The real-time data acquisition module is used to acquire real-time water depth data at multiple preset monitoring locations in the target silt-retaining dam and real-time water level data of the target silt-retaining dam. The underwater elevation determination module is used to determine the underwater elevation data corresponding to each of the preset monitoring locations based on the real-time water level data and the real-time water depth data. The boundary line determination module is used to determine the real-time water surface boundary line based on the contour boundary in the initial three-dimensional model that corresponds to the real-time water level data. The real-time terrain construction module is used to construct the real-time underwater terrain of the target silt-retaining dam based on the real-time water surface boundary line and each of the underwater elevation data; The siltation volume determination module is used to determine the real-time siltation volume of the target silt-retaining dam based on the elevation difference between the real-time underwater topography and the initial underwater topography model.

8. The real-time sediment deposition measurement system according to claim 7, characterized in that, The initial model building module includes a surface terrain acquisition unit and an underwater terrain acquisition unit; The water topography acquisition unit includes a drone measurement device for acquiring three-dimensional data of the water area of ​​the target silt-retaining dam. The underwater topography acquisition unit includes unmanned surface vessel surveying equipment or underwater depth sounding equipment, used to acquire three-dimensional data of the underwater area of ​​the target silt-retaining dam.

9. The real-time sediment deposition measurement system according to claim 7, characterized in that, The real-time data acquisition module includes a real-time water level measurement unit and multiple real-time water depth measurement units; The real-time water level measurement unit is used to measure the water level of the target silt-retaining dam. The real-time water depth measurement unit is used to measure the water depth at the preset monitoring location.

10. The real-time sediment deposition measurement system according to claim 9, characterized in that, The real-time water depth measurement unit includes a floating positioning component and a depth measuring component, wherein the floating positioning component is used to ensure the stability of each depth measuring component in spatial position.

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