River channel dredging operation method, system, equipment and storage medium

Abstract

This application provides a method, system, equipment, and storage medium for river dredging operations, relating to the field of engineering technology. The method includes: acquiring geographical, meteorological, hydrological, and sediment data for the river section to be dredged and its upstream and downstream sections; constructing a watershed-wide hydrodynamic-sediment mathematical model; then, formulating a preliminary dredging plan based on the data for the dredging section; inputting the plan into the mathematical model for dredging simulation; and evaluating the dredging effect and its impact on the downstream river section. Finally, revising the preliminary plan based on the evaluation results to obtain the target dredging operation plan and implementing the dredging. This method allows for more accurate control of dredging effectiveness and environmental impact.

Description

Technical Field

[0001] The present application relates to the field of engineering, and specifically to a river dredging method, system, equipment and storage medium. Background Art

[0002] River sedimentation is one of the major issues affecting river health. Long-term sedimentation can lead to shrinkage of river channels, reduced flood discharge and drainage capacity, deterioration of navigation conditions, and even induce deterioration of the water environment and ecosystem degradation. In order to improve the siltation of river channels, river dredging has become an important part of river management.

[0003] Existing river dredging operations usually adopt the method of on-site dredging, and carry out dredging in sections according to the distribution of silt thickness. In actual projects, most existing technologies formulate dredging plans based on the siltation characteristics of the dredged river section itself, and rarely consider the impact of dredging operations on the scale of the entire river basin. The complex interactive relationship between dredging projects and the water and sediment processes in upstream and downstream river sections is ignored, making it difficult to accurately control the dredging effect and environmental impact. Summary of the invention

[0004] The present application provides a river dredging operation method, system, equipment and storage medium, which can more accurately control the dredging effect and environmental impact.

[0005] In a first aspect, the present application provides a river channel dredging method, the method comprising:

[0006] Obtaining global geographic data, global meteorological and hydrological data, and global river section silt data for the entire river section to be desilted, wherein the entire river section to be desilted includes the river section to be desilted, the upstream river section, and the downstream river section;

[0007] Constructing a hydrodynamic-sediment mathematical model for the entire river basin based on the entire geographical data, the entire meteorological and hydrological data, and the entire river section silt data;

[0008] Determine the operation geographic data, operation meteorological and hydrological data and operation river section silt data of the dredging operation section according to the global geographic data, the global meteorological and hydrological data and the global river section silt data, and formulate a preliminary dredging operation plan according to the operation geographic data, the operation meteorological and hydrological data and the operation river section silt data;

[0009] Inputting the dredging data of the dredging operation plan into the whole-basin hydrodynamics-sediment mathematical model to obtain dredging simulation data;

[0010] Evaluate the dredging operation section according to the dredging simulation data to obtain a dredging effect evaluation result;

[0011] Assess the river section environment of the downstream river section according to the dredging simulation data to determine the dredging impact assessment result;

[0012] According to the dredging effect evaluation results and the dredging impact evaluation results, the preliminary dredging operation plan is revised to obtain a target dredging operation plan, and the river section to be dredged is dredged according to the target dredging operation plan.

[0013] By adopting the above technical scheme, by obtaining the geographical, meteorological, hydrological and silt data of the entire river section to be desilted, a hydrodynamic-sediment mathematical model of the entire river basin is constructed, which provides a solid data foundation and model support for the scientific formulation of the desilting operation plan. Based on the global data to determine the key parameters of the river section for desilting operation, the proposed preliminary desilting operation plan can fully consider the characteristics of the river section itself, reflecting the concept of formulating plans according to local conditions. The preliminary plan is input into the whole basin model for desilting simulation, and the desilting simulation data obtained provides a quantitative basis for desilting effect and impact assessment. Through the multi-dimensional effect evaluation of the desilting operation section, the improvement effect of the desilting plan on river sedimentation, flood discharge, navigation conditions, water environment and ecosystem can be accurately judged, and the scientific evaluation of the desilting effect can be achieved. At the same time, the evaluation of the downstream river section environment helps to grasp the influence of the desilting project on the hydrological situation, sediment transport, riverbed morphology and other aspects of the downstream river section, control the spatial and temporal scope of the desilting impact, and reflect the systematic thinking from the perspective of the whole basin. The preliminary plan was revised based on the dredging effect evaluation and impact assessment. The resulting target dredging operation plan not only ensured the dredging effect, but also took into account the optimized control of the environmental impact on the downstream river section, thus achieving a balance between dredging effect and ecological impact.

[0014] In a second aspect of the present application, a river channel dredging operation method system is provided, comprising:

[0015] A data acquisition module is used to acquire the engineering project plan of the engineering project and determine the expected engineering cost of the current process according to the engineering project plan;

[0016] The module for determining the unfinished workload is used to obtain the completed workload of the current process, the engineering cost of the completed workload and the unfinished workload, and determine the manpower data, engineering cycle and raw material data required for the unfinished workload based on the unfinished workload and the engineering project plan;

[0017] The cost forecasting module is used to obtain the labor price trend curve and the raw material price trend curve, and determine the forecast cost of the unfinished project volume based on the labor price trend curve, the raw material price trend curve, the required labor data, the project cycle and the raw material data;

[0018] The early warning module is used to determine the predicted cost of the current process based on the predicted cost of the unfinished project volume and the project cost of the completed project volume, and to compare the predicted cost of the current process with the expected project cost in real time to obtain the comparison difference. When the comparison difference exceeds the preset difference threshold, a risk early warning signal is generated.

[0019] In a third aspect of the present application, a computer storage medium is provided, wherein the computer storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the above method steps.

[0020] In the fourth aspect of the present application, an electronic device is provided, including a processor, a memory, a user interface and a network interface, the memory is used to store instructions, the user interface and the network interface are used to communicate with other devices, and the processor is used to execute the instructions stored in the memory so that the electronic device executes the above method.

[0021] In summary, one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0022] 1. This application obtains geographical, meteorological, hydrological and silt data of the entire river section to be dredged, constructs a hydrodynamic-sediment mathematical model for the entire river basin, and provides a solid data foundation and model support for the scientific formulation of dredging operation plans. Based on the global data to determine the key parameters of the river section for dredging operations, the proposed preliminary dredging operation plan can fully consider the characteristics of the river section itself, reflecting the concept of formulating plans based on local conditions. The preliminary plan is input into the whole basin model for dredging simulation, and the dredging simulation data obtained provides a quantitative basis for dredging effect and impact assessment. Through the multi-dimensional effect evaluation of the dredging river section, it is possible to accurately judge the improvement effect of the dredging plan on river sedimentation, flood discharge and drainage, navigation conditions, water environment and ecosystem, and achieve a scientific evaluation of the dredging effect.

[0023] 2. This application combines the silt data of the operating river section with the operation geographic data to accurately define the spatial scope that needs to be desilted, quantitatively estimate the volume of silt that needs to be removed, provide a basis for the reasonable allocation of desilting resources, and avoid inefficient waste caused by blind construction. Secondly, by combining the silt data of the operating river section with the operation meteorological and hydrological data, according to the silt distribution characteristics and the law of changes in hydrological conditions, the appropriate desilting equipment is selected, which can not only meet the removal needs of different types of silt, but also adapt to the construction restrictions of different meteorological and hydrological conditions, thereby ensuring the smooth implementation of the desilting operation. Thirdly, by combining the operation meteorological and hydrological data with the silt data of the operating river section, according to the seasonal variation characteristics of meteorological and hydrological conditions and the spatial differentiation law of river channel siltation morphology, the time sequence of desilting operations is reasonably arranged, which can avoid the adverse effects of high water levels in the flood season, and take into account the special needs of navigation to ensure water depth in the dry season. At the same time, priority is given to clearing the silt river sections that pose a serious obstacle to navigation, thereby minimizing the impact on the navigation function of the river. Finally, on the basis of determining the dredging scope, dredging volume, operating equipment type and operating sequence, a preliminary dredging operation plan is formulated. Through the system integration of multiple factors, the key parameters in the plan formulation process are based on a basis, which not only meets the actual engineering needs, but also conforms to the objective natural laws, thereby laying the foundation for the scientific implementation of the dredging project.

[0024] 3. This application draws a river section silt thickness distribution map based on the silt data of the operating river section, intuitively reflects the spatial differentiation law of silt on the river plane, and analyzes the vertical silt deposition structure in combination with the cross-sectional morphology of the river channel, which can form a three-dimensional understanding of the spatial distribution of silt, reveal the internal mechanism of river channel siltation development, and provide a spatial basis for determining the scope and amount of dredging. Secondly, according to the preset silt thickness classification standard, the spatial distribution of silt is evaluated by zoning, the distribution range of the river section with serious siltation is defined, and the river section where siltation poses a substantial threat to navigation safety is highlighted, which points out the direction for the dredging project to focus on the main contradictions and resolve key risks. Thirdly, based on the operation geographic data, the longitudinal profile characteristics and cross-sectional characteristics of the river channel are analyzed, the spatial topological relationship of the river channel landform is constructed, and the key cross-sectional indicators reflecting the navigation capacity of the river channel, that is, the minimum water-passing cross-sectional position of the river channel, are extracted, so that the dredging operation is consistent with the natural morphology of the river channel, and then the navigation guarantee water depth is achieved on the basis of respecting the evolution law of the river channel landform. Finally, the distribution range of severely silted river sections is overlapped with the location of the minimum water-passing section of the river channel, and the scale of siltation and the water depth required to ensure navigation are considered in a coordinated manner to ultimately determine the scope and amount of dredging, thereby maximizing the benefits of the dredging project under the premise of balancing multiple objectives. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a process flow of a river channel dredging method provided in an embodiment of the present application;

[0026] Figure 2An architectural diagram of a river channel dredging system provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0028] In order to enable technicians in this field to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0029] In the description of the embodiments of the present application, words such as "for example" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "for example" or "for example" is intended to present related concepts in a specific way.

[0030] In the description of the embodiments of the present application, the meaning of the term "multiple" refers to two or more. For example, multiple systems refer to two or more systems, and multiple screen terminals refer to two or more screen terminals. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0031] In order to facilitate understanding of the method and system provided by the embodiments of the present application, before introducing the embodiments of the present application, the background of the embodiments of the present application is first introduced.

[0032] River sedimentation is one of the key factors that restrict the healthy development of rivers. Long-term sedimentation will lead to the shrinkage of river sections, the gradual reduction of flood discharge and drainage capacity, and the deterioration of navigation channel conditions. At the same time, the sedimentation problem may also lead to a series of negative effects such as the decline of water environment quality and the degradation of river ecosystems. In order to effectively improve the sedimentation of rivers, carrying out scientific and reasonable river dredging has become an important task and key measure for river management.

[0033] At present, river dredging operations generally adopt the method of on-site dredging, that is, according to the spatial distribution characteristics of the silt thickness in the river, the river is divided into several dredging operation areas, and the dredging project is implemented in sections. However, in actual engineering practice, most of the existing dredging technologies are based on the siltation characteristics of the dredged river section itself to formulate dredging operation plans, and rarely examine the impact of dredging projects from the scale of the entire river basin. This localized governance approach ignores the intricate interaction between dredging projects and the water and sediment transport process of upstream and downstream river sections. The changes in water flow and sediment transport processes caused by dredging operations will not only affect the scouring and silting situation of the dredged river section itself, but may also have a chain reaction on the water and sediment conditions of upstream and downstream river sections. Therefore, it is difficult for existing dredging technologies to accurately control the dredging effect and the environmental impact of the entire river basin. There is an urgent need for an advanced governance method that can take into account both dredging benefits and ecological effects.

[0034] After the background introduction of the above content, those skilled in the art can understand the problems existing in the prior art. The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0035] Based on the above background technology, please refer to Figure 1 , Figure 1 A flow chart of a river channel dredging method provided in an embodiment of the present application. The system can be implemented by a computer program or can be run as an independent tool application. Specifically, in an embodiment of the present application, the method can be applied on a server, but can also be applied on electronic devices such as a server. A river channel dredging method includes the following steps:

[0036] S101, obtaining global geographic data, global meteorological and hydrological data, and global river section silt data of the entire river section to be desilted, wherein the entire river section to be desilted includes the river section to be desilted, the upstream river section, and the downstream river section;

[0037] Specifically, in order to obtain the global geographic data, global meteorological and hydrological data, and global river section silt data of the entire river section to be desilted, it is first necessary to determine the spatial scope of the entire river section to be desilted. By extending the river section to be desilted, taking into account its upstream and downstream river sections, a complete river area is formed, that is, the entire river section to be desilted. The purpose of this is to fully grasp the geographical environment characteristics, meteorological and hydrological conditions, and river channel siltation conditions of the river section to be desilted, and to lay a data foundation for the subsequent construction of a hydrodynamic-sediment mathematical model for the entire river basin.

[0038] After clarifying the entire scope of the river section to be desilted, it is necessary to collect geographic information data in the area, including the plane position of the river, the longitudinal and cross-sectional morphology of the river channel, and the landform characteristics of the riverbank, to form global geographic data. Through field measurements, remote sensing image interpretation, historical data collection, etc., meteorological parameters (such as rainfall, evaporation, etc.) and hydrological parameters (such as flow, water level, sand content, etc.) in the entire area are obtained to form global meteorological and hydrological data. Using advanced equipment such as multi-beam bathymetry and shallow stratigraphic profilers, the thickness and distribution of silt in the entire river section are refined to obtain silt data for the entire river section.

[0039] S102, constructing a whole-basin hydrodynamic-sediment mathematical model based on the whole-basin geographic data, the whole-basin meteorological and hydrological data, and the whole-basin river section silt data;

[0040] Specifically, the construction process of the whole basin hydrodynamic-sediment mathematical model is as follows: First, according to the global geographic data, the plane shape and longitudinal and cross-sectional shape of the river are digitized to establish a spatial calculation grid reflecting the geometric characteristics of the river channel. Then, the upper boundary conditions (such as upstream inflow flow, sediment content, etc.) and lower boundary conditions (such as downstream water level, etc.) of the model are determined using the global meteorological and hydrological data. Next, based on the global river section silt data, the riverbed composition and boundary roughness are parameterized. On this basis, appropriate water flow motion control equations (such as shallow water equations) and sediment transport control equations (such as suspended load and bedload transport equations) are selected, and combined with the riverbed scouring and silting deformation equations, a whole basin hydrodynamic-sediment mathematical model that couples water flow, sediment and riverbed deformation is established. By numerically solving the above control equations, the temporal and spatial distribution of water and sediment elements such as water level, flow velocity, sediment content, and riverbed elevation at any time in the entire basin can be simulated and calculated.

[0041] S103, determining the operation geographic data, operation meteorological and hydrological data and operation river section silt data of the dredging operation section according to the global geographic data, the global meteorological and hydrological data and the global river section silt data, and formulating a preliminary dredging operation plan according to the operation geographic data, the operation meteorological and hydrological data and the operation river section silt data;

[0042] Specifically, based on the global geographic data, the geometric features such as the river plane position, longitudinal and cross-sectional morphology of the dredging operation section are extracted to form the operational geographic data reflecting the spatial attributes of the dredging section. Then, the meteorological and hydrological elements such as rainfall, evaporation, flow, water level, and sand content in the area where the dredging section is located are selected from the global meteorological and hydrological data to form the operational meteorological and hydrological data related to the dredging construction. Next, based on the global river section silt data, the spatial distribution of silt thickness in the dredging section, the physical and mechanical properties of silt and other parameters are determined to form the operational river section silt data to guide the implementation of the dredging project.

[0043] After obtaining the operation geographic data, operation meteorological and hydrological data, and operation river section silt data, a preliminary dredging operation plan can be formulated based on them. Specifically, according to the operation geographic data, the dredging operation area is reasonably divided to determine the dredging scope and total dredging volume of each operation area; according to the operation meteorological and hydrological data, the appropriate construction period is selected to avoid unfavorable construction conditions such as the flood season; according to the operation river section silt data, the dredging depth, dredging equipment selection, and dredging process flow of each operation area are determined. On this basis, the project scale, construction period, investment estimation and other factors are comprehensively considered to form a feasible preliminary dredging operation plan.

[0044] Based on the above embodiment, as an optional embodiment, the preliminary dredging operation plan is formulated according to the operation geographic data, operation meteorological and hydrological data and operation river section silt data, including:

[0045] S201, determining the dredging scope and dredging amount according to the silt data of the operating river section and the operating geographical data;

[0046] Specifically, the process of determining the scope and amount of dredging is as follows: First, comprehensively analyze the silt data of the operating river section to comprehensively evaluate the spatial distribution characteristics and siltation intensity of the river channel. Through comparative analysis of the longitudinal and transverse siltation distribution of the river channel, identify the key river sections with serious siltation and urgent need for dredging; through quantitative analysis of siltation thickness and siltation amount, estimate the control indicators of dredging engineering volume. Secondly, superimpose and analyze the geographical data of the operation to evaluate the topographic conditions and land use status of the dredging operation. Through the analysis of terrain elements such as river channel gradient and bank slope stability, identify the high-risk areas of dredging engineering; through the analysis of the current land use status on both sides of the river channel, identify the spatial conflict between dredging engineering and related economic and social activities. On this basis, comprehensively balance the needs of siltation control and the conditions for project implementation, scientifically define the scope of dredging, and reasonably determine the amount of dredging. Specifically, it includes: based on the analysis of siltation intensity, refer to the river flood discharge and drainage standards, and delineate the core areas that urgently need siltation; based on the analysis of high-risk areas, further clarify the longitudinal segmentation and lateral boundaries of siltation operations; based on the analysis of land use conflicts, make local fine-tuning of the siltation scope to avoid important infrastructure and sensitive areas; based on the siltation scope, refer to the siltation volume estimation results, and determine the siltation engineering volume of each river section and bid section. Determine the siltation scope and siltation volume based on the silt data of the operating river section and the operating geographic data.

[0047] Based on the above embodiment, as an optional embodiment, the determining of the dredging scope and dredging amount according to the silt data of the operating river section and the operating geographical data includes:

[0048] S301, drawing a silt thickness distribution map of the river section according to the silt data of the operating river section, and determining the silt spatial distribution of the silt in the river channel plane and cross section according to the silt thickness distribution map of the river section;

[0049] Specifically, collect and organize the silt thickness data of the operating river section. Through river section measurement, underwater topography measurement and other methods, obtain the silt thickness values ​​of different sections and different locations; through data screening, outlier removal, etc., ensure the accuracy and representativeness of the silt thickness data. Secondly, use GIS and other spatial analysis tools to associate the silt thickness data with the spatial location information of the river. By superimposing the coordinate information of the silt thickness measurement points with geographical elements such as the river centerline and shoreline, a spatial reference system for silt thickness is established; by establishing the corresponding relationship between the silt thickness measurement points and the river section, basic data reflecting the longitudinal siltation changes of the river are formed. On this basis, the spatial interpolation function of GIS is used to generate a continuous silt thickness distribution map. By selecting appropriate interpolation algorithms, such as Kriging interpolation and inverse distance weighted interpolation, the discrete silt thickness measurement points are spatially estimated to form a raster data layer reflecting the silt thickness changes of the entire river section; by grading and coloring the silt thickness raster data and generating contour lines, a thematic map that intuitively reflects the spatial distribution of silt thickness is finally formed.

[0050] S302, determining the distribution range of the river section with serious siltation according to a preset silt thickness classification standard and the silt spatial distribution;

[0051] Specifically, the process of determining the distribution range of river sections with severe siltation is as follows: First, according to the requirements of river stability and flood discharge and sediment discharge, the silt thickness classification standard is pre-set. By analyzing the historical data of river channel siltation, the quantitative relationship between silt thickness and river function degradation is determined; by analyzing the results of river channel scouring and sedimentation simulation, the response mechanism between silt thickness and river flow changes is determined; on the basis of comprehensive consideration of factors such as flood discharge and sediment discharge guarantee and river stability maintenance, the quantitative classification standard of silt thickness is set, such as silt thickness greater than 20% of the average water depth of the river channel is defined as light siltation, 40% is defined as moderate siltation, and 60% is defined as heavy siltation. Secondly, the spatial analysis function of GIS is used to extract the distribution range of river sections with severe siltation. The silt thickness distribution map is graded and assigned different graded attribute values ​​according to preset standards. The silt thickness distribution map with assigned graded attribute values ​​is attributed to extract the areas with severe siltation and generate the vector boundaries of the seriously silted river sections. The planar distribution characteristics of the seriously silted river sections, such as continuous distribution and sporadic distribution, are quantitatively analyzed through spatial statistics of the vector boundaries. The longitudinal distribution characteristics of the seriously silted river sections are quantitatively analyzed through spatial association of the vector boundaries with the centerline of the river channel.

[0052] S303, analyzing the longitudinal section characteristics and the cross-sectional characteristics of the river channel according to the operation geographic data, and determining the minimum water-passing section position of the river channel according to the longitudinal section characteristics and the cross-sectional characteristics;

[0053] Specifically, through the river topography measurement, the characteristic parameters of the river longitudinal section such as the elevation point and slope ratio are obtained; through the river section measurement, the characteristic parameters of the section such as the left and right bank slope angle, beach-channel ratio, and roughness are obtained; through the sampling and analysis of riverbed materials, the composition characteristic parameters such as the median particle size of riverbed sand are obtained. Secondly, the geometric characteristic analysis model of the river longitudinal section and cross section is constructed. Through the statistical analysis of geometric elements such as river elevation, river width, and water depth, the ups and downs of the river longitudinal section are described; through the quantitative extraction of geometric parameters such as cross-sectional morphology, channel storage, and hydraulic radius, the morphological and structural characteristics of the river cross section are described; through the spatial distribution analysis of geometric elements, the geometric morphology of the river longitudinal section and cross section is revealed. The change law of the river special morphological units such as mutation sections and bends are identified. On this basis, the location of the minimum water-passing section of the river channel is determined by comprehensively analyzing the geometric characteristics of the longitudinal section and cross section, and combining the law of water flow movement in the river. By comparing and analyzing the water-flowing areas of each section, the control section with the weakest water-flowing capacity can be identified; by longitudinally comparing the roughness differences between the control section and the adjacent sections, the river section with the most serious water obstruction can be determined; by horizontally analyzing the relative distribution of deep pools and shallows within the control section, the main parts of water obstruction can be determined; based on comprehensive consideration of factors such as the distribution of river siltation and the composition of the riverbed, the critical minimum water-flowing section that affects flood discharge can be determined and its accurate spatial position can be marked.

[0054] S304: Determine the desilting range and the desilting amount according to the distribution range of the seriously silted river section and the position of the minimum water-passing section of the river channel.

[0055] Specifically, on the basis of the distribution range map of the river section with serious siltation, the position of the minimum water-passing section of the river channel is superimposed. By superimposing the vector boundary of the river section with serious siltation and the dot symbol of the minimum water-passing section in space, the spatial proximity relationship between the two can be intuitively judged; by analyzing the relative position relationship between the upper and lower boundaries of the river section with serious siltation and the minimum water-passing section, the longitudinal distribution law of the minimum water-passing section in the silted river section can be judged; by linking and analyzing the spatial variation of siltation thickness inside the silted river section with the morphological characteristics of the minimum water-passing section, the influence of siltation on water-passing capacity is revealed. Secondly, on the basis of superimposed analysis, the spatial scope of dredging is determined in accordance with the principle of adapting measures to local conditions and highlighting key points. In the case where the minimum water-passing section is located inside a severely silted river section, the entire silted river section is included in the desilting scope; in the case where the minimum water-passing section is located at the upper and lower boundaries of a severely silted river section, a certain range is appropriately extended upward or downward based on the silted river section and included in the desilting scope; in the case where the minimum water-passing section is far away from the severely silted river section, a necessary scouring and silting balance river section is set between the two areas, and the silted river section, the minimum water-passing section, and the scouring and silting balance river section are included in the desilting scope. Finally, on the basis of delimiting the desilting scope, the specific desilting volume of each river section is calculated and analyzed. The silt thickness attribute value inside the desilted river section is extracted by spatially clipping the vector boundary of the desilting range and the river channel silt thickness distribution map; the silt deposition volume of each grid unit is estimated by converting the extracted silt thickness attribute value into a raster data layer and performing raster algebraic operations; the total amount of silt deposition inside different desilted river sections is obtained by accumulating and summarizing the volumes of the grid units covering the desilted river sections, and the dredging amount of the river section is finally determined by combining parameters such as the river section morphology and the physical properties of the silt.

[0056] S202, determining the type of operation equipment according to the silt data of the operation river section and the operation meteorological and hydrological data;

[0057] Specifically, the process of determining the type of operating equipment is as follows: First, comprehensively analyze the silt data of the operating river section and comprehensively evaluate the physical and mechanical properties of the river silt. By analyzing the silt particle size, moisture content, density and other indicators, the characteristics of the silt such as excavability and pumpability can be judged; by analyzing the spatial distribution of the silt, the difficulty of silt removal can be judged. Secondly, comprehensively analyze the meteorological and hydrological data of the operation and comprehensively evaluate the external environmental conditions of the dredging operation. By analyzing the meteorological indicators such as rainfall and wind speed during the operation, the impact of meteorological conditions on dredging construction can be judged; by analyzing the hydrological indicators such as water level and flow rate during the operation, the applicability requirements of hydrological conditions for dredging equipment can be judged. On this basis, comprehensively consider the silt properties, meteorological and hydrological conditions, dredging scope, dredging volume and other factors to determine the type of operating equipment that matches them. Specifically, it includes: based on the excavability and pumpability of silt, initially selecting different types of dredging equipment such as mechanical dredging and hydraulic dredging suction; based on the silt distribution characteristics and transportation needs, further clarifying the configuration requirements of different types of equipment such as dredgers, suction dredgers, and sludge transporters; based on the influence of meteorological conditions, selecting specialized dredging equipment that can adapt to severe weather, such as cutter suction dredgers that operate around the clock; based on the constraints of hydrological conditions, selecting dredging equipment that meets the water depth and flow rate requirements, such as cutter suction dredgers that operate in shallow waters.

[0058] Based on the above embodiment, as an optional embodiment, determining the type of operating equipment according to the silt data of the operating river section and the operating meteorological and hydrological data includes:

[0059] S401, determining the silt properties of the operating river section according to the silt data of the operating river section;

[0060] Specifically, the process of determining the properties of silt in the operating river section is as follows: First, based on the silt data collected in the early stage, the basic physical property parameters of the silt are extracted and analyzed. Through the silt particle grading test, the content ratio of different particle sizes such as clay, silt, and sand particles in the silt is determined; through the silt moisture content test, the natural moisture content, liquid limit moisture content, plastic limit moisture content and other indicators of the silt are determined; through the silt density test, the natural density, dry density, particle density and other indicators of the silt are determined. Secondly, based on the analysis of the basic physical properties of the silt, special tests on the rheology, pumpability and other engineering properties of the silt are carried out. Through the silt rheological properties test, the rheological parameters such as shear stress, viscosity coefficient, and yield stress of the silt are determined; through the silt pumpability test, the sand content, flow rate, pipeline pressure drop and other indicators of the silt under different pumping conditions are determined; by comparing and analyzing the response change law of the silt engineering property parameters under different moisture contents and different densities, the key physical property factors affecting the pumpability of the silt are mastered. Finally, based on the understanding of the silt properties at a single measuring point, the spatial differentiation of silt properties in different river sections is comprehensively analyzed. By associating the physical and mechanical property parameters of silt at different measuring points with their spatial location information, a database reflecting the spatial distribution of silt properties is constructed; by performing spatial interpolation analysis on the key parameters in the silt property database, a thematic map reflecting the silt property zoning of the entire operating river section is compiled; by superimposing and analyzing the silt property zoning map and the dredging range map determined in the early stage, the silt property characteristics within different dredging river sections are finally determined, and the silt properties of each river section are qualitatively judged, such as high-water content silt, high-sand content silt, etc.

[0061] S402, determining the water level variation characteristics and flow velocity distribution of the river section according to the operation meteorological and hydrological data, and matching the appropriate type of the operation equipment according to the water level variation characteristics of the river section, the flow velocity distribution and the silt properties of the operation river section.

[0062] Specifically, the process of determining the variation characteristics of river water level and velocity distribution and matching the type of operating equipment is as follows: First, based on meteorological and hydrological data, the spatiotemporal variation characteristics of river water level are analyzed and determined. By statistically analyzing the water level observation data of hydrological stations over the years, the interannual variation law and flood and drought variation cycle of river water level are mastered; by comparing and analyzing the water level process lines in different periods, the annual variation law and flood season characteristics of river water level are mastered; by analyzing the gradient of water level at different measuring stations, the spatial variation gradient of river water level and water surface gradient distribution are mastered. Secondly, based on the water level analysis, a numerical simulation model of water flow movement is constructed to simulate and analyze the velocity distribution characteristics of the river section. By collecting basic data such as river channel topography, boundary conditions, and roughness, a mathematical model of water flow movement at the river section scale is constructed; by calibrating and verifying the model parameters, the model is ensured to have good simulation accuracy; by simulating the water flow movement process in typical periods, the spatial distribution of velocity under different water level conditions is obtained; by extracting key characteristic parameters of velocity distribution, such as cross-sectional average velocity and bottom velocity, the spatiotemporal differentiation law of river velocity is mastered. Finally, based on the analysis of water level changes and flow velocity distribution in river sections, combined with the previously determined silt properties, the adaptability evaluation and optimization of dredging equipment were carried out. By comparing and analyzing the technical performance parameters of commonly used dredging equipment, such as digging depth, ship width, draft depth, pumping capacity, etc., the water level adaptability threshold and flow velocity adaptability threshold of different equipment were determined; by analyzing the dredging process characteristics of different equipment, such as suction type, bucket wheel type, reamer type, etc., their adaptability characteristics to silt properties were determined; by superimposing and analyzing the equipment water level threshold map, flow velocity threshold map, and silt property zoning map, the adaptability of dredging equipment was spatially evaluated, and combined with construction organization, economy and other factors, the optimal operating equipment type for each river section was finally determined.

[0063] S203, determining the operation sequence according to the operation meteorological and hydrological data and the operation river section silt data;

[0064] Specifically, the meteorological and hydrological data of the operation are comprehensively analyzed to comprehensively evaluate the temporal and spatial constraints of meteorological and hydrological conditions on dredging construction. By analyzing the hydrological characteristics of different periods such as the flood season and the dry season, the time windows suitable for construction and those that need to be avoided are determined; by analyzing the regional hydrological processes such as upstream water and tidal influences, the order of dredging of river sections is determined. Secondly, the silt data of the operating river sections are comprehensively analyzed to evaluate the urgency of dredging silt in different river sections. By comparing the thickness and strength of silt longitudinally, the relative difficulty of dredging in each river section is determined; by comparing the silt particle size, water content and other indicators horizontally, the matching degree of dredging technology in each river section is determined. On this basis, the time window constraints and the difficulty of the river section are comprehensively considered to scientifically arrange the operation sequence of river dredging. Specifically, in terms of time dimension, the whole year is divided into different construction periods such as flood season, pre-flood season and post-flood season, with priority given to dredging operations before and after the flood season; in terms of space dimension, the dredging order of upstream and downstream river sections is reasonably determined according to the water inflow process and tidal influence; within the river sections, priority is given to river sections with severe siltation and urgent need for cleaning according to the silt thickness and years of siltation; among river sections with similar difficulty, priority is given to river sections that are suitable for dredging technology to improve dredging efficiency.

[0065] Based on the above embodiment, as an optional embodiment, determining the operation sequence according to the operation meteorological and hydrological data and the operation river section silt data includes:

[0066] S501, analyzing the operation meteorological and hydrological data, determining key meteorological and hydrological factor data affecting the construction, and determining the construction sequence according to the key meteorological and hydrological factor data;

[0067] Specifically, the frequency analysis of key meteorological and hydrological elements is carried out on the operational meteorological and hydrological data. By statistically analyzing the data of rainfall, water level, sediment content and other data over many years, the frequency curves of each element are drawn to determine the design values ​​of rainfall, flood level, sediment content and other values ​​under different recurrence periods; by comparing and analyzing the annual distribution rules of each element, the process lines of rainfall, water level and sediment content in the flood season and dry season are drawn to reveal the characteristics of meteorological and hydrological element changes in the flood season and dry season; through rate difference analysis, the periodicity and volatility characteristics of meteorological and hydrological element changes in different time periods are quantitatively described. Secondly, the key time periods that are conducive to dredging construction are identified. By comparing and analyzing the changing characteristics of meteorological and hydrological elements in the dry season and flood season, we can identify the period when meteorological and hydrological conditions are relatively stable during the dry season and are conducive to dredging construction; by analyzing the probability of flood level exceeding during the flood season, we can determine the period when the flood level is low and the duration is short; by analyzing the annual distribution law of sediment content during the flood season, we can determine the period when the sediment transport is less and the water flow has a lower sediment content; by comprehensively balancing rainfall, water level, sediment content and other factors, we can identify the key period when meteorological and hydrological conditions are relatively favorable and suitable for dredging construction. Finally, we can optimize the dredging construction schedule. Through the favorable construction periods identified in the early stage, combined with factors such as the total construction period of dredging construction and the amount of work in each construction section, the seasonal timing of dredging construction is scientifically arranged within the framework of the overall construction plan, and the phased rhythm of construction is reasonably grasped; by optimizing the matching relationship between the construction sequence and the key meteorological and hydrological periods, high-risk construction periods such as the flood season are avoided to the greatest extent possible, and favorable periods such as the dry season are given priority, so as to improve the efficiency of dredging construction while ensuring construction safety; by appropriately increasing the investment in dredging vessels and equipment before the critical period, racing against time to advance dredging construction, and making good temporary protection in subsequent high-risk periods, delays in construction caused by meteorological and hydrological disasters are minimized.

[0068] S502, determining the priority order of construction locations according to the silt data of the working river section;

[0069] Specifically, a three-dimensional terrain model of the river section scale is constructed based on the silt data of the operating river section. By comprehensively utilizing multi-source data such as cross-section measurement, topographic maps, and remote sensing images, the spatial distribution characteristics of the river terrain are precisely depicted; by constructing a high-resolution DEM covering the operating river section and the surrounding area, detailed information such as the undulation of the riverbed terrain and changes in micro-topography are accurately reflected; by visualizing the three-dimensional terrain model of the river channel, the macro-distribution pattern of river channel siltation is intuitively revealed. Secondly, based on the three-dimensional terrain model, a spatial analysis of the thickness of silt deposition in the river section is carried out. By comparing the changes in the river channel topography at different periods vertically, the dynamic change process of the silt deposition thickness in the river section is quantitatively analyzed; by comparing the differences in silt deposition thickness at different locations in the river channel horizontally, the spatial distribution law of the river section with severe silt deposition is determined; by extracting key statistical indicators of the silt deposition thickness in the river section, such as the average silt deposition thickness and the maximum silt deposition thickness, the spatial differentiation characteristics of the silt deposition river section are revealed. Thirdly, for the river section with severe silt deposition, sampling and analysis of the physical and mechanical properties of silt are carried out. By setting up necessary field sampling points, silt samples from different silted river sections are obtained; by conducting indoor particle composition analysis, moisture content determination, shear strength test, etc., the physical and mechanical properties of silt samples are systematically analyzed; by comparing and analyzing the similarities and differences in the properties of silt in different river sections, the spatial variation patterns of the components and structural characteristics of silt deposits in the river sections are revealed. Finally, based on the analysis of the siltation characteristics of the river sections, the priority judgment of dredging construction locations is carried out. By constructing a river section siltation risk assessment index system, risk assessment of silted river sections is carried out from multiple angles such as river stability, navigation conditions, flood control pressure, and ecological functions; by comprehensively evaluating the siltation risk levels of different river sections, combined with factors such as dredging construction organization and ship and machinery scheduling, the overall layout of dredging construction is determined; by selecting river sections with high siltation risks and strong dredging urgency as the starting locations for construction.

[0070] S503: Determine the operation sequence according to the construction location priority and the construction sequence.

[0071] Specifically, a matching model between construction location and construction sequence is constructed. A two-dimensional matrix model is constructed with the construction location priority as the row and the construction sequence as the column; the matrix row vector reflects the construction priority of different construction locations, and the column vector reflects the meteorological and hydrological suitability of different construction periods; the matrix element value reflects the comprehensive priority of construction at a specific location in a specific period, and the larger the value, the higher the comprehensive priority. Secondly, the matching priority of each construction location and construction period is calculated. The weights of the construction location priority and the construction sequence suitability are determined by the hierarchical analysis method; for each matrix element, the construction location priority and the construction sequence suitability are weighted averaged to obtain the matching priority value of the location and period combination; the matching priority value of the entire matrix is ​​standardized to obtain a matching priority matrix. Finally, the overall order of dredging operations is determined. The elements in the matching priority matrix are arranged in descending order according to the numerical size to obtain a priority column vector; the location-period combination in the column vector is sequentially encoded to form a dredging operation sequence; the operation sequence is matched with the construction location and the construction period, and finally the overall order of dredging operations in the two dimensions of time and space is determined to form a set of practical operation sequences.

[0072] S204: Formulate the preliminary dredging operation plan according to the dredging scope, the dredging volume, the type of operation equipment and the operation sequence.

[0073] Specifically, comprehensively analyze the meteorological and hydrological data of the operation to evaluate the suitability of construction in different periods. By analyzing the hydrological characteristics of the flood season and the dry season, determine the impact of water level and flow conditions on dredging construction in different periods; by analyzing the meteorological elements of different months and seasons, determine the constraints of meteorological conditions on dredging operations in different periods. Secondly, superimpose and analyze the silt data of the operating river section to evaluate the urgency of siltation in different river sections. By longitudinally comparing the siltation volume and siltation rate of different river sections, determine the urgency of dredging needs in different regions; by analyzing the composition and siltation morphology of different river sections, determine the significance of dredging effects in different regions. On this basis, comprehensively balance the suitability of meteorological and hydrological conditions and the urgency of siltation control needs, and scientifically arrange the order of dredging operations. Specifically, it includes: based on the comparative analysis of hydrological conditions during the flood season and the dry season, reasonably arrange the monthly and quarterly time schedule of dredging operations, giving priority to the dry season and periods with good meteorological conditions; based on the analysis of the degree of siltation and the characteristics of silt in different river sections, reasonably arrange the spatial sequence of dredging operations, giving priority to dredging key areas such as the main river channel with severe siltation and tributary confluence sections; on the basis of taking into account the construction intensity during the hydrological suitable period and the dry season, reasonably balance the spatial and temporal arrangements of dredging operations throughout the year and in all river sections to avoid schedule conflicts and construction windows.

[0074] S104, inputting the dredging data of the dredging operation plan into the whole-basin hydrodynamics-sediment mathematical model to obtain dredging simulation data;

[0075] Specifically, it is first necessary to convert the parameters such as the desilting scope, total desilting volume, and desilting depth in the preliminary desilting operation plan into desilting data that can be recognized by the mathematical model. These data usually include the spatial coordinates of the desilting area, the change in riverbed elevation before and after desilting, etc. Then, the above desilting data is used as the input condition of the hydrodynamic-sediment mathematical model of the entire basin, and the changes in river flow and sediment transport process after the desilting project is implemented are simulated by adjusting the terrain boundary conditions and sediment source and sink items in the model. The spatiotemporal distribution results of water level, flow velocity, sediment content, riverbed scouring and silting volume, etc. calculated by the model are the desilting simulation data.

[0076] The dredging simulation data can quantitatively reflect the impact of dredging projects on the dynamic process of river water and sediment and the siltation status. By analyzing the changes in the water level and flow velocity of the river before and after dredging, the improvement effect of the dredging project on the flood discharge and drainage capacity of the river can be evaluated; by analyzing the changes in the sediment content and riverbed scouring and silting before and after dredging, the impact of the dredging project on the sediment transport balance of the river can be evaluated; by analyzing the changes in the amount of river sedimentation within a certain period after dredging, the sustainable benefits of the dredging project can be evaluated. Compared with simple qualitative analysis, quantitative evaluation based on dredging simulation data can more comprehensively and accurately understand the effects and impacts of dredging projects.

[0077] S105, evaluating the dredging operation section according to the dredging simulation data to obtain a dredging effect evaluation result;

[0078] Specifically, the evaluation of dredging effect is mainly carried out from the following aspects: First, according to the changes in water level and flow velocity in the dredging simulation data, the impact of dredging projects on the flood discharge capacity of the river is analyzed. By comparing the water level change amplitude and flow velocity gradient of the river before and after dredging, the effect of dredging projects in reducing flood levels and increasing flow capacity is quantitatively evaluated. Secondly, according to the changes in sediment content and riverbed scouring and silting in the dredging simulation data, the impact of dredging projects on the sediment transport characteristics of the river is analyzed. By comparing the change trend of sediment content in the river before and after dredging, the spatial distribution of riverbed scouring and silting, and other indicators, the effect of dredging projects in controlling river siltation and restoring riverbed stability is quantitatively evaluated. Thirdly, according to the medium- and long-term change trends of riverbed elevation and siltation in the dredging simulation data, the sustainable benefits of dredging projects are analyzed. By comparing the recovery rate of river siltation within a certain period after dredging and the changing characteristics of siltation distribution, the effect of dredging projects in extending the service life of the river and slowing down the resiltation rate is quantitatively evaluated. Finally, based on the above analysis results, the overall benefits of the dredging project are judged to form a dredging effect evaluation result.

[0079] Based on the above embodiment, as an optional embodiment, the dredging operation river section is evaluated according to the dredging simulation data to obtain the dredging effect evaluation result, including:

[0080] S601, determining the degree of improvement of the river channel siltation condition, the effect of improving the flood discharge and drainage capacity of the river channel, the effect of improving the river channel navigation conditions, the river channel water environment response and the ecosystem response according to the dredging simulation data;

[0081] Specifically, evaluate the degree of improvement of the siltation in the river. Compare the simulated value of the riverbed elevation after dredging with the measured value of the riverbed elevation before dredging, calculate the amount of riverbed scouring and silting, and quantitatively evaluate the improvement effect of dredging on the scouring and silting pattern of the riverbed; by analyzing the spatial distribution of the amount of riverbed scouring and silting, reveal the shaping effect of dredging on the riverbed morphology, and judge whether the goal of balanced scouring and silting and riverbed morphology optimization has been achieved; by comparing and analyzing the changing trends of riverbed scouring and silting in different periods, judge the medium- and long-term effects of dredging operations, and judge the durability of dredging results. Secondly, evaluate the improvement effect of the flood discharge and drainage capacity of the river. Using the river water level and flow velocity data obtained by dredging simulation, construct a river hydraulic model, simulate and analyze the river flow conditions under different rainfall scenarios; by comparing the flow capacity of the river before and after dredging, evaluate the contribution of dredging operations to improving the flood discharge and drainage capacity of the river; by analyzing the changes in the water surface gradient and flow velocity distribution of the river, reveal the mechanism of dredging operations in optimizing the flood discharge and drainage pattern. Secondly, evaluate the improvement of river navigation conditions. Compare the river depth and channel width data obtained from the dredging simulation with the navigation standards to determine whether the goal of improving the navigation level has been achieved; identify the navigation bottleneck river sections that have not yet met the standards through the spatial heterogeneity analysis of the navigation depth and channel width, and provide decision-making references for further implementation of dredging operations; and evaluate the long-term effectiveness of dredging results in ensuring navigation safety through the stability analysis of navigation conditions. In addition, evaluate the river water environment response and ecosystem response. Use the sediment content, flow rate and other data obtained from the dredging simulation to construct a river water environment model and an ecological response model; quantitatively evaluate the effect of dredging operations on improving river water quality by comparing and analyzing indicators such as turbidity and dissolved oxygen before and after dredging; evaluate the contribution of dredging operations to the protection and restoration of river ecosystems through simulation and analysis of changes in aquatic habitats; and reveal the mechanism of action of dredging operations in the river ecological governance system through an overall evaluation of the structure and function of the river ecosystem.

[0082] S602, based on the degree of improvement of the siltation condition of the river channel, the effect of improving the flood discharge and drainage capacity of the river channel, the improvement of the navigation conditions of the river channel, the water environment response of the river channel, the ecosystem response and the preset first judgment weight, the dredging operation section is evaluated to obtain the dredging effect evaluation result.

[0083] Specifically, the process of conducting dredging effect evaluation based on the multi-index comprehensive evaluation model is as follows: First, construct a multi-index comprehensive evaluation model. Based on the five single evaluation indicators of the degree of improvement of river sedimentation, the effect of improving the flood discharge and drainage capacity of the river, the improvement of the river navigation conditions, the river water environment response, and the ecosystem response, a comprehensive evaluation index system is constructed; the weight of each evaluation indicator is calculated by pairwise comparison judgment matrix using the analytic hierarchy process to obtain the preset first judgment weight vector of the indicator; a comprehensive evaluation model based on the weighted summation method is constructed, and the calculation of the comprehensive evaluation index is realized through the linear combination of the evaluation indicators and weights. Secondly, a multi-index comprehensive evaluation is carried out. The improvement degree of river sedimentation, the effect of improving the flood discharge and drainage capacity, the improvement of navigation conditions, the water environment response, and the ecosystem response results of the quantitative evaluation in the previous article are input into the comprehensive evaluation model; combined with the preset first judgment weight, the comprehensive evaluation index of the dredging operation section is obtained through weighted summation operation; according to the comparative relationship between the comprehensive evaluation index and the preset evaluation standard, the overall effect of the dredging operation is qualitatively described to form the dredging effect evaluation result. Finally, the desilting effect evaluation results are applied.

[0084] In response to the shortcomings of dredging effects reflected in the evaluation results, the root causes of problems in river section characteristics, engineering measures, construction organization, etc. are analyzed, and improvement suggestions are put forward; the advantages of dredging effects revealed by the evaluation results are summarized, and successful experiences in river section conditions, dredging plans, management measures, etc. are sorted out to form a promotion path; scenario analysis is carried out based on the evaluation results, and the possible effects of further implementing dredging and adjusting construction plans are simulated and evaluated to provide a basis for dynamically optimizing dredging projects; in terms of river chief management, river and lake health evaluation and other work, the in-depth application of dredging effect evaluation results is explored to achieve a virtuous interaction between dredging evaluation and watershed management.

[0085] S106, evaluating the river section environment of the downstream river section according to the dredging simulation data, and determining a dredging impact assessment result;

[0086] The specific desilting impact assessment is mainly carried out from the following aspects: First, according to the changes in water level and flow velocity of the downstream river section in the desilting simulation data, the impact of the desilting project on the flood discharge and drainage conditions of the downstream river channel is analyzed. Focus on the adverse effects such as the increase of downstream water level and the decrease of flow velocity caused by desilting, and evaluate its potential threat to downstream flood control safety and navigation conditions. Secondly, according to the changes in the sediment content and sediment accumulation of the downstream river section in the desilting simulation data, the impact of the desilting project on the sediment transport characteristics of the downstream river channel is analyzed. Focus on the sudden increase of downstream sediment content and the intensification of riverbed siltation caused by desilting, and evaluate its potential impact on the ecological environment and engineering safety of the downstream river channel. Thirdly, according to the changes in water quality indicators of the downstream river section in the desilting simulation data, the impact of the desilting project on the water environment of the downstream river channel is analyzed. Focus on the problems such as the increase of turbidity and pollutant concentration of downstream water bodies caused by desilting, and evaluate its potential threat to downstream drinking water sources and water ecosystems. Finally, based on the above analysis results, the downstream impact of the desilting project is evaluated as a whole to form the desilting impact assessment results.

[0087] Based on the above embodiment, as an optional embodiment, the river section environment of the downstream river section is evaluated according to the dredging simulation data to determine the dredging impact evaluation result, including:

[0088] S601, determining water level change data, flow velocity change data and flow conversion data of the downstream river section according to the dredging simulation data, and evaluating the impact of the hydrological situation according to the change data, the flow velocity change data and the flow change data to obtain a hydrological situation impact evaluation result;

[0089] Specifically, the process of evaluating the impact of dredging simulation data on the hydrological situation of the downstream river section is as follows: First, obtain the change data of the hydrological elements of the downstream river section. Using a two-dimensional water flow mathematical model, on the basis of dredging simulation, further simulate and analyze the changes in the temporal and spatial distribution of the water level, flow velocity, and flow in the downstream river section caused by dredging operations; extract the water level change data, flow velocity change data, and flow change data of different sections and different time periods of the downstream river section to form a time series reflecting the response of the hydrological elements of the downstream river section; by comparing and analyzing with the measured values ​​of the hydrological elements before dredging, intuitively reveal the change range of the water level, flow velocity, and flow in the downstream river section caused by dredging operations. Secondly, evaluate the impact of the hydrological situation in the downstream river section. Based on the water level change data of the downstream river section, the impact of dredging operations on the flood discharge level of the downstream river section is analyzed to judge the effect on flood control safety; based on the flow velocity change data of the downstream river section, the impact of dredging operations on the flow velocity distribution of the downstream river section is analyzed to judge the effect on waterway regulation; based on the flow change data of the downstream river section, the impact of dredging operations on the water balance of the downstream river section is analyzed to judge the effect on ecological water use; based on the quantitative evaluation of the sub-element, a comprehensive impact assessment matrix of the hydrological situation is constructed to judge the overall impact of the hydrological situation in the downstream river section and form the impact assessment results of the hydrological situation. Finally, the impact assessment results of the hydrological situation are applied. Based on the assessment results, we can quantitatively understand the temporal and spatial differentiation characteristics of the changes in the hydrological regime of the downstream river sections, and zoningly define the significant and general areas affected by dredging operations to provide a basis for differentiated management and control; in response to the adverse effects revealed by the assessment results, we can determine the causes and formulate targeted mitigation measures to promote the coordination of dredging operations with flood control, navigation, and ecology in the downstream river sections; we can summarize the favorable effects revealed by the assessment results, analyze the internal mechanisms, and form theoretical guidance for the innovation of dredging models to provide a paradigm for dredging practices in other river sections in the basin and even in other basins; we can conduct scenario analysis based on the assessment results, simulate and predict the hydrological regime effects of dredging operations under different combinations of schemes, and provide a reference for scientific decision-making on dredging projects.

[0090] S602, determining the sediment transport data of the downstream river section according to the dredging simulation data, and evaluating the sediment transport impact according to the sediment transport data to obtain a sediment transport impact evaluation result;

[0091] Specifically, the process of evaluating the impact of sediment transport on downstream river sections based on dredging simulation data is as follows: First, obtain the change data of sediment transport in downstream river sections. Using a two-dimensional water flow and sediment mathematical model, on the basis of dredging simulation, further simulate and analyze the changes in the temporal and spatial distribution of sediment content, sediment transport rate, and sediment deposition in downstream river sections caused by dredging operations; extract sediment transport change data at different sections and different time periods in the downstream river sections to form a time series reflecting the response of sediment transport in the downstream river sections; by comparing and analyzing with the measured sediment transport values ​​before dredging, intuitively reveal the magnitude of changes in sediment transport in downstream river sections caused by dredging operations. Secondly, evaluate the impact of sediment transport in downstream river sections. Based on the data of sediment content changes in the downstream river section, the impact of dredging operations on the sediment concentration in the downstream river section is analyzed, and the effects on water turbidity and water quality are judged; based on the data of sediment transport rate changes in the downstream river section, the impact of dredging operations on the sediment transport flux in the downstream river section is analyzed, and the effect on sediment deposition load is judged; based on the data of sediment deposition changes in the downstream river section, the impact of dredging operations on the scouring and silting pattern of the downstream river section is analyzed, and the effects on riverbed morphology and waterway conditions are judged; on the basis of quantitative evaluation of sub-elements, a comprehensive impact assessment matrix of sediment transport is constructed, and the overall impact of sediment transport in the downstream river section is judged to form the results of sediment transport impact assessment. Finally, the results of sediment transport impact assessment are applied. Based on the assessment results, we can quantitatively understand the dynamic characteristics of changes in sediment transport in the downstream river sections, predict the risk of siltation in the downstream river sections caused by dredging operations, and provide decision-making references for timely engineering management; in response to the adverse effects revealed by the assessment results, we can conduct process mechanism analysis to form theoretical guidance for optimizing and regulating dredging plans and mitigating negative effects; summarize the favorable effects revealed by the assessment results, analyze the driving mechanism, and explore new dredging models that promote sediment erosion and siltation and optimize riverbed morphology; based on the assessment results, we can conduct scenario analysis, simulate and predict the sediment transport effects of dredging operations under different working conditions, and provide references for selecting the optimal dredging time and intensity.

[0092] S603, determining the terrain transformation data of the downstream river section according to the dredging simulation data, and evaluating the impact of the riverbed morphology according to the terrain change data to obtain a riverbed morphology impact evaluation result;

[0093] Specifically, the process of evaluating the impact on the riverbed morphology of the downstream river section based on the dredging simulation data is as follows: First, obtain the change data of the topography and geomorphology of the downstream river section. Using the two-dimensional water flow and sediment mathematical model, on the basis of the dredging simulation, further simulate and analyze the temporal and spatial distribution changes of the riverbed scouring, cross-sectional morphology, and plane morphology of the downstream river section caused by the dredging operation; extract the topographic change data of different sections and different periods of the downstream river section to form a time series reflecting the dynamic response of the riverbed morphology of the downstream river section; by comparing and analyzing with the measured data of the riverbed morphology before dredging, intuitively reveal the change range of the topography and geomorphology of the downstream river section caused by the dredging operation. Secondly, evaluate the degree of influence of the riverbed morphology of the downstream river section. Based on the data of riverbed scouring and silting changes in the downstream river section, the impact of dredging operations on the changes in the deep-sea line of the downstream river section is analyzed to judge the effect on flood discharge capacity and navigation conditions; based on the data of cross-sectional morphological changes in the downstream river section, the impact of dredging operations on the cross-sectional scale and symmetry of the downstream river section is analyzed to judge the effect on riverbank stability and bank protection projects; based on the data of plane morphological changes in the downstream river section, the impact of dredging operations on the curvature coefficient and wavelength of the river bend in the downstream river section is analyzed to judge the effect on river development and landscape effects; based on the quantitative evaluation of sub-elements, a comprehensive impact assessment matrix of riverbed morphology is constructed to judge the overall impact of the riverbed morphology in the downstream river section and form the riverbed morphology impact assessment results. Finally, the riverbed morphology impact assessment results are applied. Based on the assessment results, the temporal and spatial dynamic change characteristics of the riverbed morphology of the downstream river section are quantitatively characterized, and the risk of riverbed morphology deterioration caused by dredging operations is predicted, providing a reference for the dynamic optimization of dredging plans; in response to the adverse effects revealed by the assessment results, the internal driving mechanism is analyzed, and an ecological guidance and control strategy that takes advantage of the situation and follows the river is formulated; the favorable effects revealed by the assessment results are summarized, and the experience and practices that promote the optimization of riverbed morphology and achieve dredging and river shaping are summarized, providing a demonstration for the promotion of dredging practices in the basin; scenario analysis is carried out based on the assessment results, and the response process of riverbed morphology under different dredging intensities and different guidance and control measures is simulated and predicted, providing decision-making support for the scientific planning of dredging projects.

[0094] S604, performing a comprehensive assessment based on the riverbed morphology impact assessment result, the hydrological situation impact assessment result and the riverbed morphology impact assessment result to obtain the dredging impact assessment result.

[0095] Specifically, a comprehensive evaluation index system is constructed. The results of the hydrological situation impact assessment, the sediment transport impact assessment, and the riverbed morphology impact assessment are taken as the first-level indicators, and the key factors reflecting the significant impact in each single assessment result are taken as the second-level indicators to form a comprehensive evaluation index system; the analytic hierarchy process is used to calculate the weights of each indicator through the pairwise discriminant matrix to obtain the indicator weight vector; a comprehensive evaluation model based on weighted summation is constructed, and the comprehensive integration and quantitative characterization of the impact of dredging are achieved through dimensionless indicators and linear weighting. Secondly, a comprehensive evaluation of the impact of dredging is carried out. The results of the hydrological situation impact assessment, the sediment transport impact assessment, and the riverbed morphology impact assessment are input into the comprehensive evaluation model; combined with the indicator weights, the comprehensive evaluation index of the impact of dredging operations is obtained through weighted summation; the comprehensive evaluation index is further divided into several levels to qualitatively describe the degree of impact of dredging operations, and finally the dredging impact assessment results are obtained. Finally, the dredging impact assessment results are applied. For dredging planning of different river sections, scenario analysis is carried out to simulate and predict the comprehensive impact of different dredging schemes, and the alternative scheme with the least impact is screened and determined; for dredging projects that have been implemented, process diagnosis is carried out to promptly discover the negative effects caused by dredging operations, dynamically adjust the construction organization, and optimize the construction sequence; for dredging project management, effectiveness evaluation is carried out, and the effects of dredging operations in reducing siltation and consolidating banks, as well as improving ecology are systematically summarized to form practical experience that can be promoted and replicated; for subsequent river management and protection, risk warning is carried out, and the water, sand and geomorphological responses induced by dredging operations are proactively identified, and medium- and long-term governance strategies adapted to local conditions are formulated.

[0096] S107, according to the dredging effect evaluation result and the dredging impact evaluation result, the preliminary dredging operation plan is revised to obtain a target dredging operation plan, and dredging is performed on the river section to be dredged according to the target dredging operation plan.

[0097] Specifically, the process of revising the dredging plan and implementing the project is as follows: First, comprehensively analyze the results of the dredging effect assessment and the dredging impact assessment results to identify the advantages and disadvantages of the preliminary dredging operation plan in improving river functions and reducing negative impacts downstream. Focus on the key issues reflected in the assessment results, such as unreasonable dredging scope, unbalanced dredging intensity, and unoptimized dredging schedule. Then, in response to the above problems, the preliminary plan is revised and improved from the aspects of adjusting the dredging scope, optimizing the dredging intensity, and improving the construction sequence. For example, for the problem of unreasonable dredging scope, it is possible to consider expanding or reducing the dredging scope of some river sections; for the problem of unbalanced dredging intensity, it is possible to consider reallocating the dredging volume of each river section; for the problem of unoptimized construction sequence, it is possible to consider adjusting the order of dredging construction and give priority to river sections with large benefits and small impacts. After forming the revised plan, it is necessary to carry out numerical simulation analysis again to check the revised dredging effect and impact to ensure the rationality and feasibility of the revised plan. After multiple rounds of iterative revisions, an optimized and improved target dredging operation plan is finally formed. The target dredging operation plan is more scientific and reasonable in terms of river section division, project quantity allocation, construction organization, etc., and can minimize the negative impact while giving full play to the comprehensive benefits of the dredging project.

[0098] See also Figure 2 , Figure 2 A river channel dredging operation system architecture diagram provided in an embodiment of the present application, the river channel dredging operation system may include:

[0099] Data acquisition module 1, used to acquire global geographic data, global meteorological and hydrological data, and global river section silt data of the entire river section to be desilted, wherein the entire river section to be desilted includes the river section to be desilted, the upstream river section, and the downstream river section;

[0100] Model building module 2, used to build a whole-basin hydrodynamic-sediment mathematical model based on the whole-basin geographic data, the whole-basin meteorological and hydrological data and the whole-basin river section silt data;

[0101] The operation plan preliminary drafting module 3 is used to determine the operation geographic data, operation meteorological and hydrological data and operation river section silt data of the dredging operation section according to the global geographic data, the global meteorological and hydrological data and the global river section silt data, and formulate a preliminary dredging operation plan according to the operation geographic data, the operation meteorological and hydrological data and the operation river section silt data;

[0102] The dredging simulation module 4 is used to input the dredging data of the dredging operation plan into the whole-basin hydrodynamics-sediment mathematical model to obtain dredging simulation data;

[0103] A dredging effect evaluation module 5 is used to evaluate the dredging operation river section according to the dredging simulation data to obtain a dredging effect evaluation result;

[0104] A dredging impact assessment module 6 is used to assess the river section environment of the downstream river section according to the dredging simulation data and determine the dredging impact assessment result;

[0105] The current dredging scheme determination module 7 is used to modify the preliminary dredging operation scheme according to the dredging effect evaluation result and the dredging impact evaluation result, obtain the target dredging operation scheme, and dredge the river section to be dredged according to the target dredging operation scheme.

[0106] It should be noted that: when the system provided in the above embodiment realizes its functions, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the system and method embodiments provided in the above embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0107] Please refer to Figure 3 The application also discloses an electronic device. Figure 3 The electronic device 300 may include: at least one processor 301, at least one network interface 304, a user interface 303, a memory 305, and at least one communication bus 302 or end-to-end wireless communication.

[0108] The communication bus 302 is used to realize the connection and communication between these components.

[0109] The user interface 303 may include a display screen (Display) and a camera (Camera). Optionally, the user interface 303 may also include a standard wired interface and a wireless interface.

[0110] The network interface 304 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0111] Among them, the processor 301 may include one or more processing cores. The processor 301 uses various interfaces and lines to connect various parts in the entire server, and executes various functions of the server and processes data by running or executing instructions, programs, code sets or instruction sets stored in the memory 305, and calling data stored in the memory 305. Optionally, the processor 301 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field~Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 301 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 301, and it can be implemented separately through a chip.

[0112] Among them, the memory 305 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read~Only Memory). Optionally, the memory 305 includes a non-transitory computer-readable medium. The memory 305 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 305 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 305 may optionally be at least one storage system located away from the aforementioned processor 301. Refer to Figure 3 , the memory 305 as a computer storage medium may include an operating system, a network communication module, a user interface module and an application program of a river channel dredging method.

[0113] exist Figure 3In the electronic device 300 shown, the user interface 303 is mainly used to provide an input interface for the user and obtain the data input by the user; and the processor 301 can be used to call the application program storing the road assessment method in the memory 305. When executed by one or more processors 301, the electronic device 300 executes one or more methods in the above-mentioned embodiments. It should be noted that for the aforementioned method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited to the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required for the present application. In the above embodiments, the description of each embodiment has its own emphasis. For the parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0114] In the several implementation modes provided in the present application, it should be understood that the disclosed system can be implemented in other ways. For example, the system embodiments described above are only schematic, such as the division of modules, which is only a logical function division. There may be other division modes in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, indirect coupling or communication connection of systems or modules, which can be electrical or other forms. The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0115] The present application also provides a computer storage medium that can store multiple instructions, which are suitable for being loaded and executed by a processor as described above. Figure 1 The river channel dredging method of the embodiment shown in the figure can be found in the specific implementation process. Figure 1 The specific description of the illustrated embodiment will not be repeated here.

[0116] In addition, each functional module in each embodiment of the present application can be integrated into a processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.

[0117] If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a memory and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned memory includes: various media that can store program codes, such as USB flash drives, mobile hard drives, magnetic disks or optical disks.

[0118] The above are only exemplary embodiments of the present disclosure and cannot be used to limit the scope of the present disclosure. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the disclosure of the specification and the truth of practice, those skilled in the art will easily think of other embodiments of the present disclosure.

[0119] This application is intended to cover any variation, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art not described in the present disclosure. The description and examples are to be regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A river channel dredging method, characterized in that: The method comprises: Obtaining global geographic data, global meteorological and hydrological data, and global river section silt data for the entire river section to be desilted, wherein the entire river section to be desilted includes the river section to be desilted, the upstream river section, and the downstream river section; Constructing a hydrodynamic-sediment mathematical model for the entire river basin based on the entire geographical data, the entire meteorological and hydrological data, and the entire river section silt data; According to the global geographic data, the global meteorological and hydrological data and the global river section silt data, the operation geographic data, the operation meteorological and hydrological data and the operation river section silt data of the dredging operation section are determined, and according to the operation geographic data, the operation meteorological and hydrological data and the operation river section silt data, a preliminary dredging operation plan is formulated, including: Determine the desilting scope and desilting amount according to the silt data of the operating river section and the operating geographical data; Determine the type of operation equipment according to the silt data of the operation river section and the meteorological and hydrological data of the operation; Determine the operation sequence according to the operation meteorological and hydrological data and the operation river section silt data; Formulate the preliminary dredging operation plan according to the dredging scope, the dredging volume, the type of operation equipment and the operation sequence; Inputting the dredging data of the dredging operation plan into the whole-basin hydrodynamics-sediment mathematical model to obtain dredging simulation data; Evaluate the dredging operation section according to the dredging simulation data to obtain a dredging effect evaluation result; Assess the river section environment of the downstream river section according to the dredging simulation data to determine the dredging impact assessment result; According to the dredging effect evaluation results and the dredging impact evaluation results, the preliminary dredging operation plan is revised to obtain a target dredging operation plan, and the river section to be dredged is dredged according to the target dredging operation plan.

2. The method according to claim 1, characterized in that The determining of the dredging scope and dredging amount according to the silt data of the operating river section and the operating geographical data comprises: Draw a silt thickness distribution map of the river section according to the silt data of the operating river section, and determine the silt spatial distribution of the silt on the river channel plane and cross section according to the silt thickness distribution map of the river section; Determine the distribution range of the river section with serious siltation according to the preset silt thickness classification standard and the silt spatial distribution; Analyze the longitudinal section characteristics and cross-sectional characteristics of the river channel according to the operation geographic data, and determine the minimum water-passing section position of the river channel according to the longitudinal section characteristics and the cross-sectional characteristics; The dredging scope and the dredging amount are determined according to the distribution range of the seriously silted river section and the position of the minimum water-passing cross-section of the river channel.

3. The method according to claim 1, characterized in that Determining the type of operating equipment according to the silt data of the operating river section and the meteorological and hydrological data of the operation includes: Determine the silt properties of the operating river section according to the silt data of the operating river section; The water level variation characteristics and flow velocity distribution of the river section are determined according to the operation meteorological and hydrological data, and the appropriate type of operation equipment is matched according to the water level variation characteristics of the river section, the flow velocity distribution and the silt properties of the operation river section.

4. The method according to claim 1, characterized in that: Determining the operation sequence according to the operation meteorological and hydrological data and the operation river section silt data includes: Analyze the operation meteorological and hydrological data, determine key meteorological and hydrological factor data affecting the construction, and determine the construction sequence based on the key meteorological and hydrological factor data; Determine the priority of construction locations based on the silt data of the working river section; The operation sequence is determined according to the construction location priority and the construction sequence.

5. The method according to claim 1, characterized in that The step of evaluating the dredging operation section according to the dredging simulation data to obtain a dredging effect evaluation result includes: Determine the degree of improvement of the river channel siltation condition, the effect of improving the river channel flood discharge and drainage capacity, the effect of improving the river channel navigation conditions, the river channel water environment response and the ecosystem response based on the dredging simulation data; According to the degree of improvement in the siltation condition of the river channel, the effect of improving the flood discharge and drainage capacity of the river channel, the improvement effect of the navigation conditions of the river channel, the water environment response of the river channel, the ecosystem response and the preset first judgment weight, the dredging operation section is evaluated to obtain the dredging effect evaluation result.

6. The method according to claim 1, characterized in that The step of evaluating the river section environment of the downstream river section according to the dredging simulation data and determining the dredging impact assessment result includes: Determine the water level change data, flow velocity change data and flow rate change data of the downstream river section according to the dredging simulation data, and evaluate the impact of the hydrological situation according to the water level change data, the flow velocity change data and the flow rate change data to obtain a hydrological situation impact evaluation result; Determine the sediment transport data of the downstream river section according to the dredging simulation data, and evaluate the sediment transport impact according to the sediment transport data to obtain a sediment transport impact evaluation result; Determine the topographic change data of the downstream river section according to the dredging simulation data, and evaluate the impact of the riverbed morphology according to the topographic change data to obtain a riverbed morphology impact evaluation result; The dredging impact assessment result is obtained by conducting a comprehensive assessment based on the riverbed morphology impact assessment results, the hydrological situation impact assessment results and the sediment transport impact assessment results.

7. A river channel dredging system, characterized in that: For implementing the method described in any one of claims 1 to 6, the system comprises: A data acquisition module is used to acquire global geographic data, global meteorological and hydrological data, and global river section silt data of the entire river section to be desilted, wherein the entire river section to be desilted includes the river section to be desilted, the upstream river section, and the downstream river section; A model building module, used to build a basin-wide hydrodynamic-sediment mathematical model based on the global geographic data, the global meteorological and hydrological data, and the global river section silt data; An operation plan preliminary drafting module is used to determine the operation geographic data, operation meteorological and hydrological data and operation river section silt data of the dredging operation section according to the global geographic data, the global meteorological and hydrological data and the global river section silt data, and to draft a preliminary dredging operation plan according to the operation geographic data, the operation meteorological and hydrological data and the operation river section silt data; A dredging simulation module, used for inputting the dredging data of the dredging operation plan into the whole-basin hydrodynamics-sediment mathematical model to obtain dredging simulation data; A dredging effect evaluation module is used to evaluate the dredging operation river section according to the dredging simulation data to obtain a dredging effect evaluation result; A dredging impact assessment module, used to assess the river section environment of the downstream river section according to the dredging simulation data, and determine the dredging impact assessment result; The current dredging scheme determination module is used to amend the preliminary dredging operation scheme according to the dredging effect evaluation result and the dredging impact evaluation result, obtain the target dredging operation scheme, and dredge the river section to be dredged according to the target dredging operation scheme.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the method according to any one of claims 1 to 6.

9. An electronic device, characterized in that: It includes a processor, a memory and a transceiver, the memory is used to store instructions, the transceiver is used to communicate with other devices, and the processor is used to execute the instructions stored in the memory so that the electronic device executes the method according to any one of claims 1 to 6.

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