A method, device, equipment, medium and product for determining a plant ecological bank protection measure beneficial to anti-erosion performance

Abstract

The present application discloses a method, device, equipment, medium and product for determining plant ecological bank protection measures conducive to anti-scouring performance, which relates to the field of river bank protection. The method includes a water flow scouring initiation stage, in which the scouring rate of the plant bank protection is determined based on the scouring rate calculation formula; a water flow scouring damage stage. If the current state of the plant is that the plant undergoes overturning damage, the first water flow drag force acting on the above-ground part of the plant is determined according to the root radius, shear strength below the ground surface of the plant and the height of the action point of the water flow drag force acting on the above-ground part of the plant, and the first flow velocity is determined; if the current state is that the root system is completely pulled out, the second water flow drag force acting on the above-ground part of the plant is determined according to the overall pulling strength of the root system and the reduction coefficient of the tensile strength of the root-soil composite aggregate, and the second flow velocity is determined, so as to quantitatively evaluate the scouring ability of the river ecological bank protection and formulate plant ecological bank protection measures, which can clarify and quantify the treatment effect of the plant ecological bank protection measures.

Description

Technical Field

[0001] The present application relates to the field of riverbank protection, and particularly to a method, device, equipment, medium and product for determining plant ecological riverbank protection measures conducive to anti-scouring performance. Background Art

[0002] Riverbanks are important habitat units in river corridors. They not only provide survival and migration sites for terrestrial and hygrophytic plants, but also play an important role in regulating climate and conserving ecology. The roots of riverside slope plants can effectively enhance the stability of the riverbank protection, mainly reflected in the anchoring, reinforcement, and retaining effects of the root-soil composite aggregates on the riverbank soil mass. Since the defects and expansion stages that occur before the riverbank collapses and fails have already caused shallow stability failures, but the description of the scouring initiation and failure processes is not yet clear, and the existing statements are not unified.

[0003] The research on scouring mechanism generally focuses on two aspects: the sediment incipient motion at the micro scale and the scouring erosion of the riverbank protection at the macro scale. Each has its own characteristics. Among them, at the micro scale, it focuses on the sediment incipient motion stage, and the incipient motion criterion has not been unified, generally being a human judgment. After adding plants, this process becomes more complex, and the expression variables of incipient motion velocity and sediment transport rate are difficult to apply to plant riverbank protection; the research on the scouring erosion of the riverbank protection at the macro scale does not consider the scouring mechanism process at the micro scale, but focuses on the continuous scouring process within a specific time. Its theory holds that continuous shear scouring occurs only after the bed shear stress exceeds the shear strength of the soil mass. However, for the riverbank soil mass, even very low flow velocities can cause scouring, and it is easier for soil particles to roll than to slide during the scouring process. Therefore, this theory and assumption do not conform to the actual scouring process, and this theory is questionable.

[0004] Based on the above micro and macro theories, there is no clear description of the scouring process and mechanism of plant ecological riverbank protection, and the quantitative expression does not conform to the actual phenomenon, which affects the formulation of plant ecological riverbank protection measures and leads to poor treatment effects of plant ecological riverbank protection measures. Summary of the Invention

[0005] The purpose of the present application is to provide a method, device, equipment, medium and product for determining plant ecological riverbank protection measures conducive to anti-scouring performance, so as to solve the problem of poor treatment effects of plant ecological riverbank protection measures.

[0006] To achieve the above purpose, the present application provides the following solutions:

[0007] In the first aspect, the present application provides a method for determining plant ecological riverbank protection measures conducive to anti-scouring performance, including:

[0008] During the initial stage of scouring by water flow, the scouring rate of the vegetated bank is determined based on the scouring rate calculation formula; the scouring rate calculation formula is corrected according to scouring parameters; the scouring parameters include the shear stress at the soil-water interface.

[0009] If the designed water flow velocity exceeds the critical velocity, it is determined that the water flow scouring failure stage is entered, and the current state of the plant is determined.

[0010] If the current state is that the plant undergoes overturning failure, the first water flow drag force acting on the above-ground part of the plant is determined based on the root radius, shear strength below the ground surface of the plant, and the height of the action point of the water flow drag force on the above-ground part of the plant.

[0011] If the current state is that the entire root system is pulled out, the second water flow drag force acting on the above-ground part of the plant is determined based on the overall root pull-out strength and the reduction coefficient of the tensile strength of the root-soil composite aggregate.

[0012] The first flow velocity when the plant undergoes overturning failure is determined based on the first water flow drag force.

[0013] The second flow velocity when the entire root system is pulled out is determined based on the second water flow drag force.

[0014] The scouring ability of the river ecological bank is quantitatively evaluated based on the scouring rate of the vegetated bank, the first flow velocity, and the second flow velocity, and measures for the plant ecological bank are formulated.

[0015] In a second aspect, the present application provides a device for determining measures for a plant ecological bank conducive to anti-scouring performance, including:

[0016] A module for determining the scouring rate of the vegetated bank, which is used to determine the scouring rate of the vegetated bank based on the scouring rate calculation formula during the initial stage of scouring by water flow; the scouring rate calculation formula is corrected according to scouring parameters; the scouring parameters include the shear stress at the soil-water interface.

[0017] A module for determining the current state of the plant, which is used to determine that the water flow scouring failure stage is entered and determine the current state of the plant if the designed water flow velocity exceeds the critical velocity.

[0018] A first water flow drag force determination module, which is used to determine the first water flow drag force acting on the above-ground part of the plant based on the root radius, shear strength below the ground surface of the plant, and the height of the action point of the water flow drag force on the above-ground part of the plant if the current state is that the plant undergoes overturning failure.

[0019] A second water flow drag force determination module, which is used to determine the second water flow drag force acting on the above-ground part of the plant based on the overall root pull-out strength and the reduction coefficient of the tensile strength of the root-soil composite aggregate if the current state is that the entire root system is pulled out.

[0020] The first flow velocity determination module is configured to determine the first flow velocity when the plant undergoes overturning failure according to the first water flow drag force;

[0021] The second flow velocity determination module is configured to determine the second flow velocity when the whole root system is disengaged according to the second water flow drag force;

[0022] The plant ecological bank protection measure formulation module is configured to quantitatively evaluate the scouring ability of the river ecological bank protection according to the plant bank protection scouring rate, the first flow velocity and the second flow velocity, and formulate plant ecological bank protection measures.

[0023] In a third aspect, the present application provides a computer device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to implement the method for determining a plant ecological bank protection measure beneficial to anti-scouring performance described in any one of the above.

[0024] In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the method for determining a plant ecological bank protection measure beneficial to anti-scouring performance described in any one of the above.

[0025] In a fifth aspect, the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements the method for determining a plant ecological bank protection measure beneficial to anti-scouring performance described in any one of the above.

[0026] According to the specific embodiments provided by the present application, the following technical effects are disclosed in the present application:

[0027] In the present application, the scouring process, mechanism, quantitative expression and calculation formula of the plant ecological bank protection are respectively studied in the water flow scouring start-up stage and the water flow scouring damage stage. Specifically, in the water flow scouring start-up stage, the plant bank protection scouring rate is determined based on the scouring rate calculation formula. In the water flow scouring damage stage, the water flow drag force in different states is determined according to the current state of the plant, and the flow velocity in different states is determined. Then, according to the plant bank protection scouring rate, the first flow velocity and the second flow velocity in different stages, the scouring ability of the river ecological bank protection is quantitatively evaluated, and plant ecological bank protection measures are formulated to measure the anti-scouring ability and scouring damage standard of the plant ecological bank protection, improve the treatment effect of the plant ecological bank protection measures, and provide a basis for related projects. Description of the Drawings

[0028] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic flowchart of a method for determining a plant ecological revetment measure beneficial to anti-erosion performance in an embodiment of the present application;

[0030] Figure 2 Schematic diagram showing that local depression first occurs in the soil without vegetation cover during the erosion process of a herbaceous vegetation revetment provided in an embodiment of the present application;

[0031] Figure 3 Schematic diagram showing that the roots will be completely pulled out during the erosion failure process of a herbaceous vegetation revetment provided in an embodiment of the present application;

[0032] Figure 4 Vertical view of the stress state when a plant in an embodiment of the present application is overturned;

[0033] Figure 5 Top view of the stress state when a plant in an embodiment of the present application is overturned;

[0034] Figure 6 Schematic diagram of the structure of a computer device provided in an embodiment of the present application. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0036] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0037] As Figure 1 shown, the method for determining a plant ecological revetment measure beneficial to anti-erosion performance provided in the embodiment of the present application is executed by a computer device. Specifically, it can be executed independently by a computer device such as a terminal or a server, or jointly executed by a terminal and a server. In the embodiment of the present application, the method includes the following steps.

[0038] A method for determining a plant ecological revetment measure beneficial to anti-erosion performance includes:

[0039] Step 101: In the stage of starting erosion by water flow, determine the erosion rate of the vegetated bank based on the erosion rate calculation formula; the erosion rate calculation formula is corrected according to the erosion parameters; the erosion parameters include the shear stress at the soil-water interface.

[0040] Step 102: If the designed water flow velocity exceeds the critical velocity, determine that it enters the stage of erosion damage by water flow, and determine the current state of the plants.

[0041] Step 103: If the current state is that the plants are overturned and damaged, determine the first water flow drag force on the above-ground part of the plants according to the root radius, shear strength below the ground surface of the plants, and the height of the action point of the water flow drag force on the above-ground part of the plants.

[0042] Step 104: If the current state is that the whole roots are pulled out, determine the second water flow drag force on the above-ground part of the plants according to the overall root pulling strength and the reduction coefficient of the tensile strength of the root-soil composite aggregate.

[0043] Step 105: Determine the first flow velocity when the plants are overturned and damaged according to the first water flow drag force.

[0044] Step 106: Determine the second flow velocity when the whole roots are pulled out according to the second water flow drag force.

[0045] Step 107: Quantitatively evaluate the erosion resistance of the river ecological bank according to the erosion rate of the vegetated bank, the first flow velocity, and the second flow velocity, and formulate measures for the ecological vegetated bank.

[0046] In an exemplary embodiment, Step 101 can be replaced by the following Steps 201 - 203.

[0047] Step 201: In the stage of starting erosion by water flow, determine the shear stress at the soil-water interface according to the shear force constant, the fluid velocity on the surface of the object, and the soil layer thickness when the parallel water flow decreases to 0 during the vertical infiltration process on the surface layer of the soil layer.

[0048] Step 202: Correct the excess shear stress equation according to the shear stress to determine the erosion rate calculation formula.

[0049] The erosion rate calculation formula is:

[0050] E = k vp ·U m

[0051] where E is the erosion rate of the vegetated bank; k vp is the erosion loss coefficient on the surface of the vegetated bank under the set flow velocity, kU is the scouring loss coefficient of the revetment soil mass under the set flow velocity; ξ p is the flow velocity reduction coefficient caused by vegetation; m is the power law index.

[0052] Step 203: Determine the scouring rate of the vegetated revetment according to the scouring rate calculation formula.

[0053] Furthermore, in the scouring initiation stage, in this stage, the soil mass at the uncovered part of the vegetation loosens first, and the water flow scouring is transmitted to the deep layer of the soil mass through the whole plant, and the scouring rate is calculated.

[0054] First, modify the excess shear stress equation according to the scouring initiation process.

[0055] The excess shear stress equation before modification is:

[0056] E = k(τ0 - τ c ) α (1)

[0057] where E is the scouring rate of the vegetated revetment, that is, the scouring rate of the riverbank soil mass per unit area, cm 3 / h / cm 2 ; τ0 is the shear stress at the soil-water interface, Pa; k is the scouring loss coefficient, cm / h / Pa; τ c is the critical shear stress of the soil mass, Pa; α is used to characterize the relationship between the scouring rate of the bank slope soil mass and the difference between the effective stress at the soil-water interface and the critical shear stress of the soil mass, and is generally assumed to be a linear relationship, that is, α is equal to 1.

[0058] According to the parallel fluid shear force theory, the fluid shear force on the surface of a rigid object is power-exponentially related to the change in the fluid velocity gradient. It is considered that the shear stress generated by the parallel fluid on the soil surface is calculated by the following formula:

[0059]

[0060] In the formula, K is the shear force constant; v is the fluid flow velocity on the surface of the object, that is, the near-bottom flow velocity; h is the soil layer thickness when the parallel water flow decreases to 0 during the vertical infiltration process on the surface layer of the soil layer; m is the power law index, which is taken according to the fluid type, and the m value of water is taken as 1 / 2.

[0061] At this time, it is assumed that the flow velocity decreasing gradient in the soil layer is linear, and the thickness of the flow velocity decreasing layer is linearly related to the average soil layer thickness where initiation occurs, that is, h = ak, a is a constant, then there is the following relationship:

[0062]

[0063] Substitute equation (3) into equation (1) and remove the shear strength τ of the soil mass c, that is, it is considered that the scour loss coefficient k directly reflects the ability of the revetment soil to resist scour, and soil erosion may occur even at very low flow velocities:

[0064]

[0065] Let denote the scour loss coefficient caused by the near-bottom flow velocity v in the soil layer. Equation (4) can be written as:

[0066] E = k v ·v 0.5 (5)

[0067] Equation (5) can be written in the form of the vertical average flow velocity. Let v = ξU, where U is the vertical average flow velocity of the water flow, and make k U = k v ξ m , then the calculation formula for the scour rate expressed by the vertical average flow velocity can be obtained:

[0068] E = k U ·U 0.5 (6)

[0069] When considering the flow velocity attenuation caused by the interference of surface vegetation, let v p = ξ p v, where ξ p is the flow velocity reduction coefficient caused by vegetation. Then the calculation formula for the scour rate of the vegetated revetment can be obtained:

[0070] E = k vp ·U 0.5 (7)

[0071] The k U and k vp in equations (6) and (7) respectively represent the scour loss coefficients of the revetment soil and the vegetated revetment surface under specific flow velocities, with the unit of cm / h / Pa, and can be obtained through experiments.

[0072] In an exemplary embodiment, during the scour failure stage, when scour continuously causes local depressions on the riverbank surface, as Figure 2 shown; the water flow continuously impacts the vegetation, and the aggregated soil particles around the roots are continuously lost, and the root-soil composite aggregates are no longer intact. The vegetation on the bank slope has undergone deflection and lodging or the overall form of being pulled out has occurred, Figure 3 shown. Based on the above two situations, the critical flow velocity for scour failure is calculated.

[0073] The calculation of scour failure needs to consider the scour failure type. When the ground vegetation is high enough, the vegetation is flipped due to the drag force of the water flow, as Figures 4 - 5 shown. Let F tThe drag force of the water flow received by the above-ground part of the plant. Assuming that when the plant deflects, the root system below the ground is a hemisphere with a radius of R, and when it is just in the overturned state, the shear force of the soil mass on the surface of the hemisphere reaches the shear strength τ c , and there is no frictional dislocation between the hemisphere layers. Ignoring the frictional braking effect of the sporadic roots at the hemisphere edge rotating the hemisphere, a moment balance equation is established with the intersection point of the main stem of the plant and the ground as point o, as shown in the following formula (8).

[0074]

[0075] Simplified to get:[[]]

[0076]

[0077] In the formula: F t1 ——The drag force of the water flow received by the above-ground part of the plant, that is, the first drag force of the water flow, N; h p ——The height of the action point of the drag force of the water flow on the above-ground part of the plant, m; θ is the integral angle of the overturned hemisphere volume, indicating the included angle between the central axis of a semi-circular soil layer surface of the hemisphere and the radius R, and the integral range is -90° to 90°.

[0078] When the ground vegetation is low vegetation and is not enough to overturn, such as stemless herbaceous plants, when scour damage occurs, it is the overall extraction of the root system. At the critical state, the drag force received by the plant is equal to the remaining overall pull-out strength within the root embedment depth.

[0079] F t2 =k t ·F max (10)

[0080] In the formula: k t Is the reduction coefficient of the tensile pull-out strength of the root-soil composite aggregate, which can be determined according to the ratio of the specific surface area of the root system without soil part to the overall root system when extracting; F max Is the overall pull-out strength of the root system, N.

[0081] The thrust F of the water flow on the vegetation t Can refer to the drag force calculation formula:[[]]

[0082] F t =0.5C D A p ρU 2 (11)

[0083] In the formula: F t =F t1 =F t2 , C D Is the drag force coefficient, generally 0.4; A p Is the effective scour area of the plant, m2 ; ρ is the density of the water body.

[0084] Substituting Equation (11) into (9) can obtain the first flow velocity calculation formula at the time of overturning failure as:

[0085]

[0086] Substituting Equation (11) into (10) can obtain the second flow velocity calculation formula at the time of plant extraction failure as:

[0087]

[0088] The above Equations (12) and (13) are the flow velocity calculation formulas for the scouring failure of the vegetation revetment to be overturned or extracted.

[0089] According to the above calculation formulas, when the design standards and design flow velocities of the river channel are known, on the one hand, it can be used to quantitatively evaluate the anti-scouring ability of the existing river channel ecological revetment, or on the other hand, it can provide a design basis when designing the revetment vegetation.

[0090] Based on Equation (12), it can be determined that when the whole root hemisphere of the plant undergoes overturning, at this time, shear sliding occurs between the sphere surface and the soil body, and the sliding surface is the sphere surface, and the sliding shear stress on the surface reaches the shear strength of the soil body.

[0091] When conducting quantitative evaluation, the scouring rate calculation of Equation (7) can be used to determine the possible soil scouring amount and anti-scouring performance during the non-destruction stage when the existing revetment is subjected to the design flow scouring; Equation (13) can be used to determine the maximum flow velocity that can be withstood for scouring.

[0092] When designing the revetment vegetation, the maximum flow velocity that the revetment can withstand can be directly determined according to Equation (13), or the plant species to be matched can be determined. At the same time, Equation (7) is used to calculate the possible soil loss amount when the designed vegetation is used without damage.

[0093] When the soil scouring loss amount caused by the designed vegetation is lower than a certain limit value and the designed river channel flow velocity does not exceed the maximum failure flow velocity, it is considered that the designed river channel vegetation is safe and reliable. Therefore, based on the above, the treatment effect of formulating plant ecological revetment measures is remarkable.

[0094] Based on the same inventive concept, an embodiment of the present application further provides a device for determining a plant ecological bank protection measure beneficial to anti-scouring performance for implementing the method for determining a plant ecological bank protection measure beneficial to anti-scouring performance involved above. The solution provided by this device for solving problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the device for determining a plant ecological bank protection measure beneficial to anti-scouring performance provided below can refer to the limitations on the method for determining a plant ecological bank protection measure beneficial to anti-scouring performance in the above text, and will not be repeated here.

[0095] In an exemplary embodiment, the present application provides a device for determining a plant ecological bank protection measure beneficial to anti-scouring performance, including:

[0096] A plant bank scouring rate determination module, configured to determine the plant bank scouring rate based on a scouring rate calculation formula during the starting stage of water flow scouring; the scouring rate calculation formula is corrected according to scouring parameters; the scouring parameters include the shear stress at the soil-water interface.

[0097] A current state determination module of the plant, configured to determine that it enters the water flow scouring and destruction stage and determine the current state of the plant if the designed water flow velocity exceeds the critical velocity.

[0098] A first water flow drag force determination module, configured to determine the first water flow drag force acting on the above-ground part of the plant according to the root radius, shear strength below the ground of the plant, and the height of the action point of the water flow drag force on the above-ground part of the plant if the current state is that the plant undergoes overturning failure.

[0099] A second water flow drag force determination module, configured to determine the second water flow drag force acting on the above-ground part of the plant according to the overall root pulling strength and the reduction coefficient of the tensile strength of the root-soil composite aggregate if the current state is that the entire root system is pulled out.

[0100] A first flow velocity determination module, configured to determine the first flow velocity when the plant undergoes overturning failure according to the first water flow drag force.

[0101] A second flow velocity determination module, configured to determine the second flow velocity when the entire root system is pulled out according to the second water flow drag force.

[0102] A plant ecological bank protection measure formulation module, configured to quantitatively evaluate the scouring ability of the river ecological bank protection and formulate plant ecological bank protection measures according to the plant bank scouring rate, the first flow velocity, and the second flow velocity.

[0103] The present application can provide a basis for the design and maintenance of river ecological restoration projects, and provide quantitative guidance for work such as species configuration of vegetation projects, evaluation of anti-scouring effects, and analysis of the shallow stability and safety of bank protection.

[0104] The scouring failure velocity finally determined by this application can be compared with the designed velocity of the river to determine the flood flow velocity equivalent to a certain design frequency standard. For example, if it is close to the flood standard of a river once in 50 years, it can be considered that the construction standard of the vegetation is once in 50 years. When the design standard of the river is determined, plants stable under this standard can be selected. The vegetation project determined by the scouring failure velocity in this application can be combined with engineering hydrological analysis and applied to the design standard of river ecological treatment projects, providing an exact basis for the recurrence period of revetment vegetation design, and having practical significance in the protection and restoration of river ecological systems.

[0105] The scouring rate can evaluate the scouring degree of existing plant measures to determine whether the erosion resistance performance meets the requirements.

[0106] In an exemplary embodiment, a computer device is provided. The computer device can be a server or a terminal, and its internal structure diagram can be as Figure 6 shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data for determining plant ecological revetment measures beneficial to scouring resistance performance. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it implements a method for determining plant ecological revetment measures beneficial to scouring resistance performance.

[0107] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the above method is implemented.

[0108] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by the processor, the above method is implemented.

[0109] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by the processor, the above method is implemented.

[0110] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tapes, floppy disks, flash memories, optical memories, high-density embedded non-volatile memories, resistive random access memories (ReRAM), magnetoresistive random access memories (MRAM), ferroelectric random access memories (FRAM), phase change memories (PCM), graphene memories, etc. Volatile memories can include random access memories (RAM) or external cache memories, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0111] In this application, all actions of obtaining signals, information, or data are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and obtaining authorization from the owner of the corresponding device.

[0112] The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logics, data processing logics based on quantum computing, etc., without limitation.

[0113] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0114] In this text, specific examples are used to illustrate the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present application.

Claims

1. A method for determining a plant ecological revetment measure beneficial to anti-scouring performance, characterized in that The method for determining the plant ecological revetment measures beneficial to the anti-scouring performance includes: In the initial stage of water flow scouring, determining the scouring rate of the plant revetment based on the scouring rate calculation formula; the scouring rate calculation formula is corrected according to the scouring parameters; the scouring parameters include the shear stress at the soil-water interface; If the designed water flow velocity exceeds the critical velocity, it is determined that the water flow scouring damage stage is entered, and the current state of the plant is determined; If the current state is that the plant undergoes overturning damage, determining the first water flow drag force acting on the above-ground part of the plant according to the root radius, shear strength below the ground surface of the plant, and the height of the action point of the water flow drag force on the above-ground part of the plant; If the current state is that the whole root system is pulled out, determining the second water flow drag force acting on the above-ground part of the plant according to the overall root pulling strength and the reduction coefficient of the tensile strength of the root-soil composite aggregate; Determining the first flow velocity when the plant undergoes overturning damage according to the first water flow drag force; Determining the second flow velocity when the whole root system is pulled out according to the second water flow drag force; Quantitatively evaluating the scouring ability of the river ecological revetment according to the scouring rate of the plant revetment, the first flow velocity, and the second flow velocity, and formulating the plant ecological revetment measures.

2. The method for determining the plant ecological bank protection measures beneficial to anti-scouring performance according to claim 1, characterized in that, In the initial stage of water flow scouring, determining the scouring rate of the plant revetment based on the scouring rate calculation formula, specifically including: In the initial stage of water flow scouring, determining the shear stress at the soil-water interface according to the shear force constant, the fluid velocity on the object surface, and the soil layer thickness when the parallel water flow decreases to 0 during the vertical infiltration process on the soil layer surface; Correcting the excess shear stress equation according to the shear stress to determine the scouring rate calculation formula; Determining the scouring rate of the plant revetment according to the scouring rate calculation formula.

3. The method for determining the plant ecological bank protection measures beneficial to anti-scouring performance according to claim 2, characterized in that The scouring rate calculation formula is: E = k vp ·U m Among them, E is the scouring rate of the vegetated bank; k vp is the scouring loss coefficient of the vegetated bank surface under the set flow velocity, k U is the scouring loss coefficient of the bank soil body under the set flow velocity; ξ p is the flow velocity reduction coefficient caused by vegetation; m is the power-law exponent; U is the mean vertical flow velocity of the water flow.

4. The method for determining the plant ecological revetment measure beneficial to the anti-scouring performance according to claim 1, characterized in that The first water flow drag force F t1 is as follows: Among them, h p is the height of the acting point of the drag force of the water flow on the above-ground part of the plant; R is the root radius of the plant below the ground; τ c is the critical shear stress of the soil mass; The second water flow drag force F t2 is F t2 = k t · F max Among them, k t is the reduction coefficient of the tensile strength of the root-soil composite aggregate; F max is the overall tensile strength of the root system.

5. The method for determining the plant ecological bank protection measures beneficial to anti-scouring performance according to claim 4, characterized in that, The first flow velocity U1 is Among them, C D is the drag coefficient; A p is the effective scouring area of plants; ρ is the water body density.

6. The method for determining the plant ecological bank protection measures beneficial to anti-scouring performance according to claim 4, characterized in that, The second flow velocity U2 is Among them, C D is the drag coefficient; A p is the effective scouring area of the plant; ρ is the water density.

7. A device for determining a plant ecological bank protection measure beneficial to anti-scouring performance, characterized in that, The device for determining the plant ecological revetment measures beneficial to the anti-scouring performance includes: A plant revetment scouring rate determination module, used to determine the scouring rate of the plant revetment based on the scouring rate calculation formula in the initial stage of water flow scouring; the scouring rate calculation formula is corrected according to the scouring parameters; the scouring parameters include the shear stress at the soil-water interface; A current state determination module of the plant, used to determine that the water flow scouring damage stage is entered and determine the current state of the plant if the designed water flow velocity exceeds the critical velocity; A first water flow drag force determination module, used to determine the first water flow drag force acting on the above-ground part of the plant according to the root radius, shear strength below the ground surface of the plant, and the height of the action point of the water flow drag force on the above-ground part of the plant if the current state is that the plant undergoes overturning damage; A second water flow drag force determination module, used to determine the second water flow drag force acting on the above-ground part of the plant according to the overall root pulling strength and the reduction coefficient of the tensile strength of the root-soil composite aggregate if the current state is that the whole root system is pulled out; A first flow velocity determination module, used to determine the first flow velocity when the plant undergoes overturning damage according to the first water flow drag force; A second flow velocity determination module, used to determine the second flow velocity when the whole root system is pulled out according to the second water flow drag force; The plant ecological bank protection measure formulation module is used to quantitatively evaluate the scouring capacity of the river ecological bank protection according to the plant bank protection scouring rate, the first flow velocity and the second flow velocity, and formulate plant ecological bank protection measures.

8. A computer device, comprising: A memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method for determining a plant ecological bank protection measure beneficial to the anti-scouring performance according to any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for determining a plant ecological bank protection measure beneficial to the anti-scouring performance according to any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for determining a plant ecological bank protection measure beneficial to the anti-scouring performance according to any one of claims 1-6.

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