Riverbed erosion and deposition amount calculation improvement method and system based on terrain grading encryption and medium

Abstract

The invention relates to an improved riverbed erosion and deposition amount calculation method and system based on terrain classification encryption and a medium, and the method comprises the steps: 1, collecting the fixed section and underwater terrain observation data of a typical river reach; step 2, cutting an encrypted section based on topographic observation data; 3, calculating the erosion and deposition amount of each level of encrypted section; and 4, determining the erosion and deposition amount of the section of the river section and calculating the encryption series. According to the method, the terrain and section observation data are adopted, the river channel scouring and silting amount deviation calculated based on the terrain and the section is reduced, the section is subjected to multi-stage encryption through the river channel terrain observation data, the control index for judging that the encryption stage number is qualified is provided, and the calculation method for obtaining the riverbed scouring and silting amount based on the river channel storage change between the sections is further optimized; the riverbed scouring and silting adjustment degree of the riverway can be reflected more accurately and truly, and a foundation support is provided for river treatment.

Description

Technical Field

[0001] The present application relates to the fields of hydraulics and river dynamics, and in particular to an improved method, system and medium for calculating riverbed scouring and silting volume based on terrain classification and densification. Background Art

[0002] The calculation of riverbed scouring and silting has always been an important part of riverbed evolution, which can reflect the changing state of riverbed as a whole. There are terrain method, cross-section method and sediment transport method for calculating scouring and silting. However, on the one hand, due to the generally long distance between river hydrological stations, which is often more than 100 kilometers, it is difficult to use the sediment transport method to grasp the scouring and silting changes of riverbed for a certain local river section; on the other hand, the observation cost of riverbed underwater topography is high, the observation frequency is low, and there are problems such as large differences in observation data at different scales, which are rarely used in calculating riverbed scouring and silting; the cross-section method uses fixed cross-section data to reflect the scouring and silting of riverbed based on the change of channel storage volume under a certain water level. The cross-section data is relatively easy to obtain, but the cross-section arrangement has a great restriction on the calculation accuracy of scouring and silting. The choice of cross-section spacing often ranges from several hundred meters to one or two kilometers. The representativeness of the cross-section to the actual scouring and silting of the river channel is different, which affects the calculation accuracy of riverbed scouring and silting, and sometimes even leads to the opposite nature of scouring and silting, reducing the reference value of riverbed scouring and silting for river channel planning and management.

[0003] In order to grasp the actual scouring and silting conditions of the riverbed relatively accurately, this application simultaneously uses terrain and cross-section observation data, starting from reducing the deviation in calculating the scouring and silting amount of the river channel based on terrain and cross-section, using the river channel terrain observation data to perform multi-level encryption of the cross-section, and proposing control indicators for judging whether the encryption level is qualified. The calculation method of the riverbed scouring and silting amount based on the changes in the river channel storage between sections is further optimized, which can more accurately and truly reflect the degree of adjustment of the riverbed scouring and silting of the river channel and provide basic support for river management. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an improved method, system and medium for calculating the amount of riverbed erosion and siltation based on terrain classification and encryption, which can be used to relatively accurately calculate and reflect the amount of riverbed erosion and siltation, etc., and provide a basic basis and technical support for the protection, planning and management of rivers.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides an improved method for calculating riverbed scouring and silting volume based on terrain classification and densification, comprising the following steps:

[0007] Step 1. Collect fixed section and underwater topographic observation data of typical river sections;

[0008] Step 2. Cut the encrypted section based on the terrain observation data;

[0009] Step 3. Calculate the scouring and silting volume of each level of densified sections;

[0010] Step 4. Determine the level of encryption for calculating erosion and siltation volume at the river section.

[0011] The implementation of step 1 is as follows:

[0012] Step 11. Collect observation data such as typical river sections and underwater river topography from two measurements;

[0013] Step 12. Construct a digital elevation model of the river underwater terrain.

[0014] The implementation of step 2 is as follows:

[0015] Step 21. According to the fixed section layout, uniform encryption is performed between every two sections, where level 1 encryption is performed between fixed sections J. i With J i+1 Encrypted J 1i Section, level 2 encryption is respectively in fixed section J i and Level 1 Encryption Section J 1i , Level 1 encrypted section J 1i With fixed section J i+1 Encrypted J 2i and J 2i+1 ; The cross-section layout of encryption level 3 and above is similar, and the initial encryption level can generally be set as level 3;

[0016] Step 22. Using the digital elevation model constructed based on terrain observation data, extract the starting point distance and elevation data of each level of encrypted sections according to the scale of fixed section observation.

[0017] The implementation of step 3 is as follows:

[0018] Step 31. Using the channel storage volume method, based on the data of the unencrypted and encrypted sections at all levels, calculate the total amount of riverbed erosion and sedimentation between each two fixed sections of the river section and the total amount of riverbed erosion and sedimentation between the two fixed sections of the river section between the two measurements. The total amount of riverbed erosion and sedimentation between the two unencrypted fixed sections and the river section is D s , W s , the amount of riverbed erosion and siltation at the nth level densified section is D sn , W sn , the unit is 10,000 m 3 ;

[0019] Step 32. Calculate the total erosion and sedimentation deviation between each two fixed sections and the river section before and after the densification. For example, after the first level of densification, the erosion and sedimentation deviation between the two fixed sections is θ1 = D s1 -D s , the deviation of the total scouring and silting amount of the river section is After the nth (n>1) level of densification, the deviation of scouring and silting between two fixed sections is θ n =D sn -D s(n-1) , the deviation of the total scouring and silting amount of the river section is The unit is 10,000 m 3 .

[0020] The implementation of step 4 is as follows:

[0021] Step 41. For the scouring and silting amount between sections calculated in step 32, draw the scouring and silting amount between sections along the river section under the conditions of no encryption and encryption at various levels. If the scouring and silting properties between two fixed sections along the river section calculated by the nth level encryption and the n-1th level encryption are the same, that is, both are scouring or silting, then it is preliminarily considered that the nth level encryption is reasonable and effective. If the scouring and silting properties are different, that is, they cannot be both scouring or silting, then return to step 21 to encrypt the first level data again, and repeat the subsequent steps;

[0022] Step 42. According to the effective encryption level n preliminarily screened in step 41, a deviation comparison chart is drawn. If the deviation of scouring and silting between fixed sections after the nth level of encryption is θ n Significantly reduced, and If the value is close to 0, it proves that the nth level encryption is reasonable and effective. Otherwise, it should return to step 21 to continue encrypting the n+1th level until the reasonable and effective encryption conditions are met.

[0023] The basic principle of calculating the amount of riverbed erosion and deposition using the tank storage volume method is as follows:

[0024] The calculation is based on cross-sectional measurement data. According to the cross-sectional data of the background and sediment deposition status during the calculation period, the Calculate the cross-sectional area under a certain water level. i，j is the cross-sectional area of ​​the jth section at the i-th measurement under a certain water level, Δl k is the distance between the kth and k+1th measuring points on the cross section, and npt is the number of measuring points on the cross section.

[0025] According to the cross-sectional area, the volume of the river channel at a certain water level can be calculated. The volume of the river channel is calculated using the prism volume formula Calculate, where V i is the channel volume between the jth section and the j+1th section at the i-th measurement at a certain water level, ΔL j is the distance from the jth section to the j+1th section, and ncs is the number of sections.

[0026] According to the difference in the channel volume between two adjacent measurements, the scouring and silting volume within the time interval between the two measurements can be obtained as W: i =∑V i -∑V i+1 i=1,2,…,ny-1, where Wi It is the amount of scouring and silting of the river channel in the interval from the i-th measurement to the i+1-th measurement. A value greater than 0 represents silting, and a value less than 0 represents scouring. ny is the number of measurements of the cross-section data.

[0027] In a second aspect, the embodiment of the present application provides an improved system for calculating riverbed scouring and silting volume based on terrain classification and densification, which is characterized by comprising:

[0028] Data collection module, used to collect fixed section and underwater topographic observation data of typical river sections;

[0029] Section cutting module, used to cut encrypted sections based on terrain observation data;

[0030] Scouring and silting volume calculation module, calculates the scouring and silting volume of each level of densified sections;

[0031] The module for determining the encryption level clarifies the encryption level for calculating the erosion and siltation volume of the river section.

[0032] In a third aspect, an embodiment of the present application provides a computer-readable storage medium storing program code, which, when executed by a processor, implements the steps of the improved method for calculating riverbed erosion and siltation based on terrain classification and encryption as described above.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] This application uses terrain and cross-section observation data, starting from reducing the deviation of river channel scouring and silting volume calculated based on terrain and cross-section, uses river channel terrain observation data to perform multi-level encryption of the cross-section, proposes control indicators for judging the qualified encryption level, and further optimizes the calculation method of riverbed scouring and silting volume based on changes in river channel storage between sections. It can more accurately and truly reflect the degree of riverbed scouring and silting adjustment in the river channel and provide basic support for river management. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A calculation flow chart of an improved method for calculating riverbed scouring and silting volume based on terrain classification and densification according to an embodiment of the present invention;

[0037] Figure 2 Schematic diagram of the 1st to 3rd level encryption method of river section layout

[0038] Figure 3Comparison of scouring and silting volume between sections after 1st to 3rd level densification of a river section

[0039] Figure 4 Comparison chart of scouring and silting deviation between sections and total deviation of a river section after 1-3 levels of infilling;

[0040] Figure 5 This is a system block diagram of an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0042] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0043] The terms "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and should not be understood as indicating or implying relative importance, nor should they be understood as requiring or implying any such actual relationship or order between these entities or operations.

[0044] Please see attached Figure 1 The present invention discloses an improved method for calculating riverbed scouring and silting volume based on terrain classification and densification, comprising the following steps:

[0045] Step 1. Collect fixed cross-section and underwater topographic observation data of typical river sections. The implementation method is as follows:

[0046] Step 11. Collect observation data such as typical river sections and underwater river topography from two measurements;

[0047] Step 12. Construct a digital elevation model of the river underwater terrain.

[0048] Step 2: Cut the encrypted section based on the terrain observation data. The implementation method is as follows:

[0049] Step 21. According to the fixed section layout, uniform encryption is performed between every two sections, where level 1 encryption is performed between fixed sections J. i With J i+1 Encrypted J1i Section, level 2 encryption is respectively in fixed section J i and Level 1 Encryption Section J 1i , Level 1 encrypted section J 1i With fixed section J i+1 Encrypted J 2i and J 2i+1 ; The cross-section layout of encryption level 3 and above is similar, and the initial encryption level can generally be set as level 3;

[0050] Step 22. Using the digital elevation model constructed based on terrain observation data, extract the starting point distance and elevation data of each level of encrypted sections according to the scale of fixed section observation.

[0051] Step 3. Calculate the scouring and silting volume of each level of densified sections. The implementation method is as follows:

[0052] Step 31. Using the channel storage volume method, based on the data of the unencrypted and encrypted sections at all levels, calculate the total amount of riverbed erosion and sedimentation between each two fixed sections of the river section and the total amount of riverbed erosion and sedimentation between the two fixed sections of the river section between the two measurements. The total amount of riverbed erosion and sedimentation between the two unencrypted fixed sections and the river section is D s , W s , the amount of riverbed erosion and siltation at the nth level densified section is D sn , W sn , the unit is 10,000 m 3 ;

[0053] Step 32. Calculate the total erosion and sedimentation deviation between each two fixed sections and the river section before and after the densification. For example, after the first level of densification, the erosion and sedimentation deviation between the two fixed sections is θ1 = D s1 -D s , the deviation of the total scouring and silting amount of the river section is After the nth (n>1) level of densification, the deviation of scouring and silting between two fixed sections is θ n =D sn -D s(n-1) , the deviation of the total scouring and silting amount of the river section is The unit is 10,000 m 3 .

[0054] Step 4. Determine the calculation level of erosion and siltation of the river section, which can be achieved as follows:

[0055] Step 41. For the scouring and silting amount between sections calculated in step 32, draw the scouring and silting amount between sections along the river section under the conditions of no encryption and encryption at various levels. If the scouring and silting properties between two fixed sections along the river section calculated by the nth level encryption and the n-1th level encryption are the same, that is, both are scouring or silting, then it is preliminarily considered that the nth level encryption is reasonable and effective. If the scouring and silting properties are different, that is, they cannot be both scouring or silting, then return to step 21 to encrypt the first level data again, and repeat the subsequent steps;

[0056] Step 42. According to the effective encryption level n preliminarily screened in step 41, a deviation comparison chart is drawn. If the deviation of scouring and silting between fixed sections after the nth level of encryption is θ n Significantly reduced, and If the value is close to 0, it proves that the nth level encryption is reasonable and effective. Otherwise, it should return to step 21 to continue encrypting the n+1th level until the reasonable and effective encryption conditions are met.

[0057] The specific steps of the embodiment are as follows:

[0058] Step 1: Collect fixed section and terrain observation data of a river section with a length of about 10.2 km in 2020 and 2021, understand the observation scale of the fixed section and terrain data, and construct an underwater terrain digital elevation model; the original number of fixed sections is 12, and the section observation scale is 1:2000.

[0059] Step 2: Perform level 3 encryption on the original 12 fixed sections. The encryption layout is as follows: Figure 2 ,Among them, the number of sections after level 1, 2, and 3 encryption are 23, 45, and 89, respectively.,Based on the terrain digital elevation model and the scale of the original section observation data,,the starting point distance and elevation data of the encrypted sections are,extracted.

[0060] Step 3: Use the channel storage volume method to calculate the erosion and siltation of the original section and the 1st, 2nd, and 3rd level sections, and compare the calculation results of the erosion and siltation between the original two sections. Figure 3 Among them, the scouring and silting amounts between the two sections calculated after level 1 encryption and the original section, and between level 2 encryption and level 1 encryption are of opposite nature. The scouring and silting properties between the sections of level 3 encryption and level 2 encryption are consistent. It is preliminarily believed that level 3 encryption is effective.

[0061] Step 4: Further compare the total scouring and silting volume of the river section calculated at each level of encryption. The deviation of the total scouring and silting volume of the river section decreases with the increase of the encryption level. The deviation between the total scouring and silting volume calculated at level 3 encryption and level 2 encryption drops to 0.02 million m 3 , satisfying the encryption validity conditions, such as Figure 4 In summary, for the selected river channel type, the fixed sections are arranged in three levels based on the existing ones, and the section spacing is reduced from 850m to 115m, which can better represent the actual scouring and silting characteristics of the riverbed.

[0062] The embodiment of the present application provides an improved system for calculating riverbed scouring and silting volume based on terrain classification and densification, which is characterized by comprising:

[0063] Data collection module 1, used to collect fixed section and underwater topographic observation data of typical river sections;

[0064] Section cutting module 2, used for cutting encrypted sections based on terrain observation data;

[0065] Scouring and silting volume calculation module 3 calculates the scouring and silting volume of each level of densified sections;

[0066] The module 4 for determining the encryption level specifies the encryption level for calculating the erosion and siltation volume of the river section.

[0067] An embodiment of the present application provides a computer-readable storage medium, which stores program code. When the program code is executed by a processor, the steps of the improved method for calculating riverbed erosion and deposition volume based on terrain classification and encryption are implemented as described above.

[0068] An embodiment of the present application provides a computer-readable storage medium, which stores program code. When the program code is executed by a processor, the steps of the method for quickly calculating the backflow volume of tributaries in a reservoir area as described above are implemented.

[0069] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0070] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0071] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0072] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0073] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0074] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0075] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0076] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An improved method for calculating riverbed scouring and silting volume based on terrain classification and densification, characterized in that: The following steps are involved: Step 1. Collect fixed section and underwater topographic observation data of typical river sections; Step 2. Cut the encrypted section based on the terrain observation data; Step 3. Calculate the scouring and silting volume of each level of densified sections; Step 4. Determine the level of encryption for calculating erosion and siltation volume at the river section.

2. The improved method for calculating riverbed scouring and silting volume based on terrain classification and densification according to claim 1 is characterized in that: The implementation of step 1 is as follows: Step 11. Collect observation data such as typical river sections and underwater river topography from two measurements; Step 12. Construct a digital elevation model of the river underwater terrain.

3. The improved method for calculating riverbed scouring and silting volume based on terrain classification and densification according to claim 2 is characterized in that: The implementation of step 2 is as follows: Step 21. According to the fixed section layout, uniform encryption is performed between every two sections, where level 1 encryption is performed between fixed sections J. i With J i+1 Encrypted J 1i Section, level 2 encryption is respectively in fixed section J i and Level 1 Encryption Section J 1i , Level 1 encrypted section J 1i With fixed section J i+1 Encrypted J 2i and J 2i+1 ; The cross-section layout of encryption level 3 and above is similar, and the initial encryption level can generally be set as level 3; Step 22. Using the digital elevation model constructed based on terrain observation data, extract the starting point distance and elevation data of each level of encrypted sections according to the scale of fixed section observation.

4. The improved method for calculating riverbed scouring and silting volume based on terrain classification and densification according to claim 3 is characterized in that: The implementation of step 3 is as follows: Step 31. Using the channel storage volume method, based on the data of the unencrypted and encrypted sections at all levels, calculate the total amount of riverbed erosion and sedimentation between each two fixed sections of the river section and the total amount of riverbed erosion and sedimentation between the two fixed sections of the river section between the two measurements. The total amount of riverbed erosion and sedimentation between the two unencrypted fixed sections and the river section is D s , W s , the amount of riverbed erosion and siltation at the nth level densified section is D sn , W sn , the unit is 10,000 m 3 ; Step 32. Calculate the total erosion and sedimentation deviation between each two fixed sections and the river section before and after the densification. For example, after the first level of densification, the erosion and sedimentation deviation between the two fixed sections is θ1 = D s1 -D s , the deviation of the total scouring and silting amount of the river section is After the nth (n>1) level of densification, the deviation of scouring and silting between two fixed sections is θ n =D sn -D s(n-1) , the deviation of the total scouring and silting amount of the river section is The unit is 10,000 m 3 .

5. The improved method for calculating riverbed scouring and silting volume based on terrain classification and densification according to claim 4 is characterized in that: The implementation of step 4 is as follows: Step 41. For the scouring and silting amount between sections calculated in step 32, draw the scouring and silting amount between sections along the river section under the conditions of no encryption and encryption at various levels. If the scouring and silting properties between two fixed sections along the river section calculated by the nth level encryption and the n-1th level encryption are the same, that is, both are scouring or silting, then it is preliminarily considered that the nth level encryption is reasonable and effective. If the scouring and silting properties are different, that is, they cannot be both scouring or silting, then return to step 21 to encrypt the first level data again, and repeat the subsequent steps; Step 42. According to the effective encryption level n preliminarily screened in step 41, a deviation comparison chart is drawn. If the deviation of scouring and silting between fixed sections after the nth level of encryption is θ n Significantly reduced, and If the value is close to 0, it proves that the nth level encryption is reasonable and effective. Otherwise, it should return to step 21 to continue encrypting the n+1th level until the reasonable and effective encryption conditions are met.

6. The improved method for calculating riverbed scouring and silting volume based on terrain classification and densification according to claim 5 is characterized in that: The basic principle of calculating the amount of riverbed erosion and deposition using the tank storage volume method is as follows: The calculation is based on cross-section measurement data. According to the cross-section data of the background and sediment deposition status during the calculation period, the Calculate the cross-sectional area under a certain water level. i，j is the cross-sectional area of ​​the jth section at the i-th measurement under a certain water level, Δl k is the distance between the kth and k+1th measuring points on the cross section, and npt is the number of measuring points on the cross section. According to the cross-sectional area, the volume of the river channel at a certain water level can be calculated. The volume of the river channel is calculated using the prism volume formula Calculate, where V i is the channel volume between the jth section and the j+1th section at the i-th measurement at a certain water level, ΔL j is the distance from the jth section to the j+1th section, and ncs is the number of sections. According to the difference in the channel volume between two adjacent measurements, the scouring and silting volume within the time interval between the two measurements can be obtained as W: i =∑V i -∑V i+1 i=1, 2,...,ny-1, in the formula, W i It is the amount of scouring and silting of the river channel in the interval from the i-th measurement to the i+1-th measurement. A value greater than 0 represents silting, and a value less than 0 represents scouring. ny is the number of measurements of the cross-section data.

7. An improved system for calculating riverbed erosion and siltation based on terrain classification and densification, characterized in that: include, Data collection module, used to collect fixed section and underwater topographic observation data of typical river sections; Section cutting module, used to cut encrypted sections based on terrain observation data; Scouring and silting volume calculation module, calculates the scouring and silting volume of each level of densified sections; The module for determining the encryption level clarifies the encryption level for calculating the erosion and siltation volume of the river section.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, and when the program codes are executed by a processor, the steps of the improved method for calculating riverbed scouring and silting volume based on terrain classification and encryption as described in any one of claims 1 to 6 are implemented.

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