Method and system for shortening design period of river dredging

Abstract

The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a method and a system for shortening a river dredging design cycle, the method macroscopically divides design steps in the river dredging design cycle, and the design steps are digitalized, standardized and automated by applying an independent development program in a subentry mode. An efficient and accurate riverway dredging design frame system is constructed, the technical defect that an existing riverway dredging design period is long and complicated can be overcome, the riverway dredging design period is remarkably shortened, the overall efficiency of a riverway dredging design project is greatly improved, and the manpower and material resource cost is effectively reduced; the method effectively guarantees the on-time implementation and smooth promotion of a river dredging project, and has great economic and social benefits. According to the method, the river dredging section is rapidly designed, intelligent conversion and transmission of river dredging hydraulic design information and hydrodynamic model calculation simulation are efficiently achieved, multiple times of calculation of a large-scale complex river network hydrodynamic model can be effectively supported, and guarantee and support are provided for scheme optimization and improvement.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy and hydropower engineering, and in particular to a method and a system for shortening a river dredging design period. Background Art

[0002] In recent years, due to the interference of multiple factors such as human activities and climate change, many rivers are facing flood disasters, water shortages and ecological and environmental problems. River dredging, as a traditional river regulation engineering measure, plays an important role in improving river water quality, preventing flood disasters, improving water resource utilization, enhancing the city's image and promoting the construction of ecological civilization.

[0003] River dredging design is a solid foundation and an important prerequisite for the implementation of river dredging projects. The existing traditional river dredging design method adopts steps such as hydraulic design, data processing, and hydrodynamic model simulation verification. Hydraulic design and data processing mostly rely on manual operation, which consumes huge manpower and material costs. The design cycle is often measured in months, and it is difficult to meet the actual needs of project design time nodes and overall progress in terms of timeliness and accuracy. The contradiction between the dredging design cycle of a single river and a small river and the overall progress of the project is often not prominent, but when dredging design is carried out for rivers in long-distance and complex river network areas, the lengthy and complicated dredging design cycle has become a short board and weak link that restricts the advancement of the project. It not only consumes huge manpower and material resources, but also greatly compresses the working time of downstream professionals, resulting in an overall lag in the project schedule.

[0004] The existing river dredging design methods have the disadvantages of lengthy river dredging design cycles, high manpower and material costs, and difficulty in meeting timeliness and accuracy requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a method and system for shortening the design cycle of river dredging, which can solve the technical problems of the current traditional river dredging design cycle being long, the manpower and material costs being high, and the timeliness and accuracy being difficult to meet the requirements.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] The present invention provides a method for shortening the design period of river dredging, comprising the following steps:

[0008] Carry out precise design of river dredging; analyze the evolution of river channel, formulate the center line of river channel dredging, set the longitudinal gradient of river channel dredging and design the standard cross section of dredging, and generate the cross section of river channel terrain after dredging;

[0009] Rapid transmission of dredging section data information; input the cross-section information of the river channel after dredging designed by hydraulic engineering, and quickly respond to generate the command flow of the hydrodynamic model;

[0010] Conduct numerical simulation analysis of the hydrodynamic model; calibrate the model according to the terrain and hydrological information, conduct numerical simulation analysis of the hydrodynamic model in combination with the hydrodynamic model command flow, and determine whether the design requirements are met. If so, the design ends; if not, return to redesign.

[0011] As a preferred solution, precise design of river dredging includes the following steps:

[0012] Collect river topographic data and hydrological information, and establish a design basic database covering multiple types of data information;

[0013] Integrate basic river data, connect basic information such as water level and elevation with engineering nodes and control station nodes, and construct the coordinates of dredging engineering control points and the longitudinal gradient of dredging elevation;

[0014] According to the longitudinal gradient of dredging elevation and groundwater level information, the stability of the river excavation slope is selected and verified;

[0015] Combined with the average channel excavation depth and the slope ratio of the excavation section, the scope of the embankment protection area, the engineering dredging construction method and the construction layout, a plan for the river channel excavation bottom width is formulated;

[0016] According to the combined relationship between the required flow rate of the river and the inlet water level, determine the most unfavorable working conditions, and carry out the design of the bottom elevation of the river dredging section and the dredging standard cross section;

[0017] Based on the existing river topographic map, the terrain is cut into pieces to generate the automated and precise batch processing of the existing river cross-sections, the dredging standard sections are connected with the river dredging centerline, the existing river terrain is imported in batches, and the cross-sectional information of the river terrain after dredging is quickly formed.

[0018] As a preferred solution, the coordinates of the dredging engineering control points and the longitudinal gradient of the dredging elevation are constructed, which specifically includes the following steps:

[0019] Through professional surveying technology and equipment, we can obtain real-time data of water level and elevation, which are the basis for constructing the coordinates of engineering control points;

[0020] Connect these data with the location information of each engineering node and control station node, and construct the precise coordinates of the dredging engineering control points through professional software and technical means;

[0021] Based on the coordinate information of the dredging project control points, the longitudinal gradient of the dredging elevation is designed.

[0022] As a preferred solution, the stability of the river excavation slope is selected and verified, which specifically includes the following steps:

[0023] Determine the reasonable slope gradient based on the dredging elevation gradient and groundwater level information;

[0024] Professional slope stability analysis software is used to verify the slope gradient in combination with geological conditions to ensure the stability and safety of the selected slope gradient.

[0025] As the preferred option, a plan for expanding the bottom width of the river channel is proposed by comprehensively considering the scope of the embankment protection area, the engineering dredging construction method and the construction layout, as follows:

[0026] The scope of the dike protection area can directly affect the flood-carrying capacity of the river and the safety of both banks; the construction methods of engineering dredging, including mechanical dredging and hydraulic excavation, have different requirements for construction space; the construction layout, including the planning of temporary facilities and transportation routes, can affect the determination of the excavation bottom width; by comprehensively considering these factors, a river excavation bottom width plan can be formulated that not only meets the flood-carrying requirements and irrigation water supply needs, but is also easy to construct and manage.

[0027] Furthermore, the most unfavorable working conditions are generally divided into two situations. The first is during the flood season, when the river flow is the largest and the water level is the highest. In this case, the flood discharge capacity of the river is the most critical, and the impact of flood control on both sides of the river after dredging must be considered, that is, the scale of dredging should be based on not affecting the flood discharge safety on both sides as a control indicator; the second is during the dry season, when the flow demand along the river is large and the water level is low. At this time, it is necessary to consider the demand flow corresponding to irrigation water supply, domestic water, and industrial water on both sides of the river in the dry season, that is, the dredging scale should meet the demand flow of the river during the dry season.

[0028] As the preferred solution, the design of the bottom elevation of the river dredging section and the standard dredging cross section is carried out, as follows:

[0029] According to the designed flow of the river and the hydraulic principle, the water surface line of the river at different flow rates is calculated;

[0030] Combined with the water level under the most unfavorable working conditions, determine the bottom elevation of the dredging section to ensure that the river channel can still maintain sufficient flood discharge capacity under high water levels and can still meet the required flow along the line under low water levels;

[0031] A standard dredging cross-section is designed based on the bottom elevation of the dredging section and the bottom width of the expanded excavation. This standard dredging cross-section should be able to meet both the flood discharge requirements and the flow requirements for water supply, irrigation, domestic water and industrial water along both sides of the river.

[0032] The present invention also designs a system for shortening the river dredging design cycle, including a river dredging design module, an information transmission module, and a simulation analysis module;

[0033] The river dredging design module is used to accurately design river dredging; analyze the river evolution, formulate the river dredging centerline, set the river dredging longitudinal gradient and design the dredging standard cross section, and generate the river terrain cross section after dredging;

[0034] The information transmission module is used for the rapid transmission of dredging section data information; it inputs the cross-section information of the river channel after dredging designed by the hydraulic engineering, and quickly responds to generate the command flow of the hydrodynamic model;

[0035] The simulation analysis module is used to perform numerical simulation analysis of the hydrodynamic model; the model is calibrated according to the terrain and hydrological information, and the hydrodynamic model is numerically simulated and analyzed in combination with the hydrodynamic model command flow, and it is judged whether the design requirements are met. If so, the design is ended; if not, it returns to redesign.

[0036] Beneficial effects of the present invention:

[0037] (1) The proposed method can quickly identify elevation information based on basic data such as topography and hydrology, carry out efficient and accurate design of river dredging, effectively build an integrated connection between the existing river topography and the dredging standard design section, and significantly improve the work efficiency of river dredging hydraulic design.

[0038] (2) The proposed method can quickly respond to and generate a hydrodynamic model command stream according to the hydraulic engineering design plan, construct a high-speed transmission channel from the design drawings to the hydrodynamic mathematical model, and break the data barriers between different models, thus achieving efficient and rapid conversion of dredging section data and greatly shortening the time required for data conversion and transmission.

[0039] (3) The proposed method can combine independent innovative technical means and basic data to quickly design river dredging sections, and efficiently realize the intelligent transformation and transmission of river dredging hydraulic design information and hydrodynamic model calculation and simulation. It can effectively support multiple calculations of large-scale complex river network hydrodynamic models, and provide guarantee and support for the optimization and improvement of the scheme.

[0040] The method proposed in the present invention macroscopically divides the design steps in the river dredging design cycle, and uses independently developed programs to digitize, standardize and automate the design steps in a sub-item manner, thereby constructing a framework system for efficient and accurate river dredging design. This can overcome the technical shortcomings of the existing long and complicated river dredging design cycle, significantly shorten the design cycle of river dredging, greatly improve the overall efficiency of river dredging design projects, effectively reduce manpower and material costs, and effectively ensure the scheduled implementation and smooth progress of river dredging projects, which has great economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0042] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The present invention relates to a method and system for shortening the design cycle of river dredging, which macroscopically divides the design steps in the design cycle of river dredging, and uses self-developed programs to digitize, standardize and automate the design steps in sub-items, so as to construct a framework system for efficient and accurate river dredging design, which can overcome the technical shortcomings of the existing long and complicated design cycle of river dredging, significantly shorten the design cycle of river dredging, greatly improve the overall efficiency of river dredging design projects, effectively reduce the cost of manpower and material resources, effectively ensure the implementation and smooth progress of river dredging projects on schedule, and have great economic and social benefits. The present invention can solve the technical problems of the long design cycle of traditional river dredging, high cost of manpower and material resources, and difficulty in meeting the requirements of timeliness and accuracy.

[0045] like Figure 1 As shown, the present invention provides a method for shortening the design cycle of river dredging, which is generally constructed according to "precise design-fast conduction-numerical simulation" and specifically includes the following steps:

[0046] Step 1. Carry out precise design of river dredging; analyze the evolution of the river channel, formulate the center line of the river channel dredging, set the longitudinal gradient of the river channel dredging and design the standard cross section of the dredging, and generate the cross section of the river channel terrain after dredging;

[0047] Step 1.1. Carry out river channel evolution analysis, follow the trend of river channel direction and riverbed scouring and silting, maintain smooth water flow, and try to formulate the river channel dredging and excavation centerline from the perspective of reducing the amount of excavation; minimize the excavation of narrow beach sections to avoid new bank collapse risks; according to the river flow and the location of upstream and downstream deep grooves, try to keep the excavation direction consistent with the mainstream direction to facilitate the stability of the excavation, so as to control the river flow, guide the mainstream, and protect the embankment from scouring;

[0048] Step 1.2. Intelligently integrate the basic terrain data of the river channel, connect the basic information such as water level and elevation with the engineering nodes and control station nodes, and construct the coordinates of the dredging engineering control points and the dredging elevation gradient; the elevation gradient refers to the ratio of the elevation difference of the river surface along the river direction to the projection of the corresponding river length (i.e., horizontal distance);

[0049] During the implementation of the dredging project, accurately connecting basic information such as water level and elevation with each engineering node and control station node is a key step to ensure the smooth progress of the project and quality control. First, through professional measurement technology and equipment, real-time data of water level and elevation are obtained. These data are the basis for constructing the coordinates of the engineering control points. Then, these data are connected with the location information of each engineering node and control station node, and the precise coordinates of the dredging project control points are constructed through professional software and technical means. At the same time, based on these coordinate information, the longitudinal gradient of the dredging elevation is designed to provide a scientific basis for subsequent dredging operations. Such a connection and calculation process not only improves the accuracy and efficiency of the project, but also ensures the quality and progress of the project, providing a strong guarantee for the smooth implementation of the dredging project.

[0050] Step 1.3. Select and verify the river excavation slope based on detailed riverbed geological basic data;

[0051] Based on detailed riverbed geological basic data, the stability of the river excavation slope is selected and verified; riverbed geological data usually includes geological profiles, soil mechanics and physical and mechanical parameters, groundwater level and other information, which are crucial for determining a reasonable slope gradient. The selection of slope gradient needs to balance stability and economy, both to prevent the slope from sliding or collapsing during or after dredging, and to minimize earth excavation and reduce costs. Therefore, it is necessary to use professional slope stability analysis software or methods, such as the limit equilibrium method, finite element method, etc., to verify the slope gradient in combination with geological conditions to ensure that the selected slope gradient is within a safe range.

[0052] Step 1.4. Combined with the average channel excavation depth and the slope ratio of the excavation section, the scope of the embankment protection area, the engineering dredging construction method and the construction layout, the bottom width of the channel excavation is proposed;

[0053] Combined with the average channel excavation depth and the slope ratio of the excavation section, it is necessary to comprehensively consider a variety of factors to formulate the channel excavation bottom width. These factors include but are not limited to the scope of the embankment protection levee, which directly affects the flood discharge capacity of the river channel and the safety of both banks; engineering dredging construction methods, such as mechanical dredging, hydraulic flushing, etc., different methods have different requirements for construction space; and construction layout, including the planning of temporary facilities and transportation routes, all of which will affect the determination of the excavation bottom width. By comprehensively considering these factors, a river channel excavation bottom width plan can be formulated that not only meets the flood discharge requirements and irrigation water supply needs, but is also easy to construct and manage.

[0054] Step 1.5. According to the combined relationship between the required flow rate of the river channel and the inlet water level, determine the most unfavorable working condition, and use the formula method to design the bottom elevation of the river channel dredging section and the dredging standard cross section;

[0055] According to the combined relationship between the required flow rate of the river and the inlet water level, the most unfavorable working conditions and the scale of river dredging are determined. This usually involves hydrological analysis, which requires analyzing historical hydrological data, understanding the flow change patterns and flood peak characteristics of the river, and considering the possible impacts of future climate change and river scouring and silting.

[0056] The most unfavorable working conditions are generally divided into two situations. The first most unfavorable working condition refers to the situation in which the river flow is the largest and the water level is the highest during a specific time period (such as the flood season). In this case, the flood discharge capacity of the river is the most critical, and the impact of flood control on both sides of the river after dredging must be considered, that is, the scale of dredging should be based on not affecting the flood discharge safety on both sides as a control indicator; the second most unfavorable working condition refers to the situation in the dry season when the flow demand along the river is large and the water level is low. At this time, it is necessary to consider the demand flow corresponding to irrigation water supply, domestic water, and industrial water on both sides of the river in the dry season, that is, the scale of dredging should meet the demand flow of the river in the dry season.

[0057] After determining the most unfavorable working conditions, the formula method can be used to design the bottom elevation of the dredging section of the river and the standard cross section of the dredging. This step usually includes the following steps: First, according to the design flow of the river and the hydraulic principles, the water surface line of the river at different flow rates is calculated, which requires the use of the Manning formula or similar hydraulic formulas; secondly, combined with the water level under the most unfavorable working conditions, the bottom elevation of the dredging section is determined to ensure that in extreme cases, such as high water levels, the river can still maintain sufficient flood discharge capacity, and the river can still meet the required flow along the line under low water levels; finally, based on the bottom elevation of the dredging section and the expanded bottom width, the standard dredging cross section is designed. This cross section should not only meet the flood discharge requirements, but also meet the flow requirements of water supply irrigation, domestic water, industrial water, etc. along the two banks of the river.

[0058] Step 1.6. Develop a design tool based on Matlab program code to achieve automated and accurate batch processing of generating current river cross sections based on the current river topographic map by cutting the terrain. At the same time, connect the dredging standard section with the river dredging centerline, and batch import the current river terrain to quickly and accurately form the cross-sectional information of the river after dredging.

[0059] Step 2. Rapid transmission of dredging section data information: input the cross-section information of the river channel after dredging designed by the hydraulic engineering, and quickly respond to generate the command flow of the hydrodynamic model;

[0060] A data information rapid conversion tool was developed based on the FORTRAN language. The dredged river section data information of the hydraulic engineering design was input, and the hydrodynamic model command stream was generated in rapid response. A conversion channel from design drawings to hydrodynamic mathematical models was constructed, and the data barriers between different models were broken to achieve efficient and rapid conversion of section data.

[0061] Step 3. Perform numerical simulation analysis of the hydrodynamic model; calibrate the model according to the terrain and hydrological information, perform numerical simulation analysis of the hydrodynamic model in combination with the hydrodynamic model command flow, and determine whether the design requirements are met. If yes, the design is completed; if not, return to redesign.

[0062] Construct a hydrodynamic model of the area where the dredged river is located, and collect terrain data of the study area, including water depth, river width, lake shoreline, etc.; meteorological data, such as wind speed, wind direction, rainfall, etc.; hydrological data, such as historical water level and flow records, etc.

[0063] Establish a mathematical model based on the basic principles of fluid mechanics (such as conservation of mass, conservation of momentum, etc.); define the boundary conditions of the model, such as inflow, outflow, solid wall, etc.; select an appropriate numerical method (such as finite difference method, finite element method, etc.) as the solution method.

[0064] Generally, professional hydrodynamic simulation software (such as MIKE 21, Delft3D, etc.) is used for computer numerical simulation analysis. Based on the comparison between the numerical simulation results and the measured data, the model parameters are adjusted and the model parameter calibration work is carried out.

[0065] Import the command flow based on the dredged river section information generated in step 2 into the hydrodynamic model, carry out hydrodynamic numerical simulation, and analyze whether the numerical simulation calculation results meet the design flow and water level requirements. If the control points along the river network cannot meet the flow and water level requirements, it is necessary to go back to step 1 and re-optimize the design plan; if the control points along the river network can meet the flow and water level requirements, then this plan is the recommended dredging plan.

[0066] It should be understood that the specific order or hierarchy of steps in the process disclosed by the present invention is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims provide the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0067] Example:

[0068] This paper aims to shorten the design cycle of river dredging, constructs a framework system for efficient and accurate river dredging design, and uses a river dredging project as an example to simulate the design and analyze its effect. The specific implementation steps are as follows:

[0069] Step 1. Collect river terrain data and hydrological data in the area near a river, and establish a design basic database covering multiple types of data information.

[0070] Step 2. Intelligently integrate the basic terrain data of the river channel, connect the basic information such as water level and elevation with the project nodes and control station nodes, and construct the coordinates of the dredging project control points and the longitudinal gradient of the dredging elevation.

[0071] Step 3. Based on the basic geological data of the riverbed, select and verify the river excavation slope; combined with the average excavation depth of the river channel and the slope ratio of the excavation section, comprehensively consider the scope of the embankment protection, the engineering dredging construction method and the construction layout, and formulate the river channel excavation bottom width.

[0072] Step 4. Determine the most unfavorable working condition based on the combined relationship between the required flow rate of the river and the inlet water level, and use the formula method to design the bottom elevation of the river dredging section and the dredging standard cross section.

[0073] Step 5. Develop a design tool based on Matlab program code to achieve automated and accurate batch processing of generating current river cross sections based on the current river topographic map by cutting the terrain. At the same time, connect the dredging standard section with the river dredging centerline, and batch import the current river terrain to quickly and accurately form the cross-sectional information of the river after dredging.

[0074] Step 6. Develop a data information fast conversion tool based on FORTRAN language, input the dredged river section data information of hydraulic engineering design, and quickly respond to generate a hydrodynamic model command stream.

[0075] Step 7. Numerical simulation of hydrodynamic model;

[0076] Construct a hydrodynamic model for the area along a river, adjust the model parameters, and carry out model parameter calibration. Import the command stream based on the dredged river section information generated in step 6 into the model, carry out hydrodynamic numerical simulation, and analyze whether the numerical simulation calculation results meet the design flow and water level requirements. If the control points along the river network cannot meet the flow and water level requirements, it is necessary to go back to steps 2-5 and re-optimize the design plan; if the control points along the river network can meet the flow and water level requirements, then this plan is the recommended dredging plan.

[0077] According to the method proposed in the present invention, a river dredging project design was carried out. The river dredging length was about 300 km, and the required time was 8.1 days, while the traditional conventional hydraulic design required 25 days. Compared with the conventional design, the river dredging design cycle of the method of the present invention was shortened by 67.6%, the engineering effect was significant, and the work efficiency was greatly improved.

[0078] Table 1 Comparison of the time required for the design cycle of the present invention and the conventional design cycle

[0079]

[0080]

[0081] The present invention also provides a system for shortening the river dredging design cycle, comprising a river dredging design module, an information transmission module, and a simulation analysis module;

[0082] The river dredging design module is used to accurately design river dredging; analyze the river evolution, formulate the river dredging centerline, set the river dredging longitudinal gradient and design the dredging standard cross section, and generate the river terrain cross section after dredging;

[0083] The information transmission module is used for the rapid transmission of dredging section data information; it inputs the cross-section information of the river channel after dredging designed by the hydraulic engineering, and quickly responds to generate the command flow of the hydrodynamic model;

[0084] The simulation analysis module is used to perform numerical simulation analysis of the hydrodynamic model; the model is calibrated according to the terrain and hydrological information, and the hydrodynamic model is numerically simulated and analyzed in combination with the hydrodynamic model command flow, and it is judged whether the design requirements are met. If so, the design is ended; if not, it returns to redesign.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for shortening the design period of river dredging, characterized in that: The following steps are included: Carry out precise design of river dredging; analyze the evolution of river channel, formulate the center line of river channel dredging, set the longitudinal gradient of river channel dredging and design the standard cross section of dredging, and generate the cross section of river channel terrain after dredging; Rapid transmission of dredging section data information; input the cross-section information of the river channel after dredging designed by hydraulic engineering, and quickly respond to generate the command flow of the hydrodynamic model; Conduct numerical simulation analysis of the hydrodynamic model; calibrate the model according to the terrain and hydrological information, conduct numerical simulation analysis of the hydrodynamic model in combination with the hydrodynamic model command flow, and determine whether the design requirements are met. If yes, the design is completed; If not, go back and redesign.

2. A method for shortening the design period of river dredging according to claim 1, characterized in that: Precision design of river dredging includes the following steps: Collect river topographic data and hydrological information, and establish a design basic database covering multiple types of data information; Integrate basic river data, connect basic information such as water level and elevation with engineering nodes and control station nodes, and construct the coordinates of dredging engineering control points and the longitudinal gradient of dredging elevation; According to the longitudinal gradient of dredging elevation and groundwater level information, the stability of the river excavation slope is selected and verified; Combined with the average channel excavation depth and the slope ratio of the excavation section, the scope of the embankment protection area, the engineering dredging construction method and the construction layout, a plan for the river channel excavation bottom width is formulated; According to the combined relationship between the required flow rate of the river and the inlet water level, determine the most unfavorable working conditions, and carry out the design of the bottom elevation of the river dredging section and the dredging standard cross section; Based on the existing river topographic map, the terrain is cut into pieces to generate the automated and precise batch processing of the existing river cross-sections, the dredging standard sections are connected with the river dredging centerline, the existing river terrain is imported in batches, and the cross-section information of the river terrain after dredging is quickly formed.

3. A method for shortening the design period of river dredging according to claim 2, characterized in that: Constructing the coordinates of the dredging project control points and the longitudinal gradient of the dredging elevation includes the following steps: Through professional surveying technology and equipment, we can obtain real-time data of water level and elevation, which are the basis for constructing the coordinates of engineering control points; Connect these data with the location information of each engineering node and control station node, and construct the precise coordinates of the dredging engineering control points through professional software and technical means; Based on the coordinate information of the dredging project control points, the longitudinal gradient of the dredging elevation is designed.

4. A method for shortening the design period of river dredging according to claim 2, characterized in that: The selection and verification of the stability of the river excavation slope includes the following steps: Determine the reasonable slope gradient based on the dredging elevation gradient and groundwater level information; Professional slope stability analysis software is used to verify the slope gradient in combination with geological conditions to ensure the stability and safety of the selected slope gradient.

5. A method for shortening the design period of river dredging according to claim 2, characterized in that: Taking into account the scope of the embankment protection area, the dredging construction method and the construction layout, a plan for expanding the bottom width of the river channel is formulated, as follows: The scope of the dike protection area can directly affect the flood-carrying capacity of the river and the safety of both banks; the construction methods of engineering dredging, including mechanical dredging and hydraulic excavation, have different requirements for construction space; the construction layout, including the planning of temporary facilities and transportation routes, can affect the determination of the excavation bottom width; by comprehensively considering these factors, a river excavation bottom width plan can be formulated that not only meets the flood-carrying requirements and irrigation water supply needs, but is also easy to construct and manage.

6. A method for shortening the design period of river dredging according to claim 2, characterized in that: The most unfavorable working conditions are generally divided into two situations. The first is during the flood season, when the river flow is the largest and the water level is the highest. In this case, the flood discharge capacity of the river is the most critical, and the impact of flood control on both sides of the river after dredging must be considered, that is, the scale of dredging should be based on not affecting the flood discharge safety on both sides as a control indicator; the second is during the dry season, when the flow demand along the river is large and the water level is low. At this time, it is necessary to consider the demand flow corresponding to irrigation water supply, domestic water, and industrial water on both sides of the river in the dry season, that is, the dredging scale should meet the demand flow of the river during the dry season.

7. A method for shortening the design period of river dredging according to claim 6, characterized in that: Carry out the design of the bottom elevation of the river dredging section and the standard cross section of the dredging, as follows: According to the designed flow of the river and the hydraulic principle, the water surface line of the river at different flow rates is calculated; Combined with the water level under the most unfavorable working conditions, determine the bottom elevation of the dredging section to ensure that the river channel can still maintain sufficient flood discharge capacity under high water levels and can still meet the required flow along the line under low water levels; A standard dredging cross-section is designed based on the bottom elevation of the dredging section and the bottom width of the expanded excavation. This standard dredging cross-section should be able to meet both the flood discharge requirements and the flow requirements for water supply, irrigation, domestic water and industrial water along both sides of the river.

8. A system for shortening the design cycle of river dredging, characterized in that: Including river dredging design module, information transmission module, simulation analysis module; The river dredging design module is used to accurately design river dredging; analyze the river evolution, formulate the river dredging centerline, set the river dredging longitudinal gradient and design the dredging standard cross section, and generate the river terrain cross section after dredging; The information transmission module is used for the rapid transmission of dredging section data information; it inputs the cross-section information of the river channel after dredging designed by the hydraulic engineering, and quickly responds to generate the command flow of the hydrodynamic model; The simulation analysis module is used to perform numerical simulation analysis of the hydrodynamic model; the model is calibrated according to the terrain and hydrological information, and the numerical simulation analysis of the hydrodynamic model is performed in combination with the hydrodynamic model command flow, and it is determined whether the design requirements are met. If so, the design is terminated; If not, go back and redesign.

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