Plant ecological bank protection measure determination method and device beneficial to anti-scouring performance, equipment, medium and product

Abstract

The invention discloses a method, a device, equipment, a medium and a product for determining plant ecological bank protection measures beneficial to anti-scouring performance, and relates to the field of river bank protection.The method comprises the steps that in the water flow scouring starting stage, the plant bank protection scouring rate is determined based on a scouring rate calculation formula; a water flow scouring damage stage: if the current state of the plant is that the plant is overturned and damaged, determining a first water flow drag force borne by the part above the plant ground according to the radius of a root system below the plant ground, the shear strength and the height of an action point of the water flow drag force borne by the part above the plant ground, and determining a first flow velocity; if the current state is that the root system is integrally disengaged, determining a second water flow drag force borne by the part, above the ground, of the plant according to the overall pulling strength of the root system and the pulling strength reduction coefficient of the root-soil composite aggregate, determining a second flow speed, quantitatively evaluating the scouring capacity of the ecological revetment of the river channel, and formulating plant ecological revetment measures; and the treatment effect of plant ecological bank protection measures can be clarified and quantified.

Description

Technical Field

[0001] The present application relates to the field of riverbank protection, and in particular to a method, device, equipment, medium and product for determining plant ecological bank protection measures that are beneficial to anti-scour performance. Background Art

[0002] The river bank is an important habitat unit in the river corridor. It not only provides a place for terrestrial and wetland plants to survive and migrate, but also plays an important role in regulating climate and conserving ecology. The root system of slope plants can effectively enhance the stability of the bank protection, mainly reflecting the anchoring, reinforcement and blocking effects of the root-soil composite aggregates on the bank protection soil. Before the bank collapse, the defects and expansion stages of the bank protection have already caused shallow stability damage, but the description of the scouring initiation and destruction process is still unclear, and the existing statements are not unified.

[0003] Scour mechanism research generally focuses on two aspects: sediment initiation at the microscopic scale and revetment scour erosion at the macroscopic scale. Each has its own characteristics. Among them, the microscopic scale focuses on the sediment initiation stage, and the initiation judgment standard has not yet been unified. It is generally judged by humans. After the addition of plants, the process becomes more complicated, and its expression variables, starting flow velocity and sediment transport rate, are difficult to apply to plant revetments. The revetment scour erosion research at the macroscopic scale does not consider the scour mechanism process at the microscopic level, but focuses on the continuous scour process within a specific time. Its theory believes that the continuous shear scour volume will only be caused after the bed shear stress exceeds the shear strength of the soil. However, for the revetment soil, scour will still occur even if it encounters a very low flow rate, and it is easier for soil particles to roll than slide during the scouring process. Therefore, this theory and assumption do not match the actual scouring process, and the theory is questionable.

[0004] Based on the above-mentioned micro and macro theories, there is no clear description of the scouring process and mechanism of plant ecological revetment, and the quantitative expression does not conform to the actual phenomenon, which affects the formulation of plant ecological revetment measures and leads to poor governance effect of plant ecological revetment measures. Summary of the invention

[0005] The purpose of this application is to provide a method, device, equipment, medium and product for determining plant ecological bank protection measures that are beneficial to anti-scour performance, so as to solve the problem of poor management effect of plant ecological bank protection measures.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, the present application provides a method for determining plant ecological bank protection measures that are beneficial to anti-scour performance, comprising:

[0008] In the water flow scouring start-up stage, the scouring rate of the plant bank protection is determined 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;

[0009] If the designed water flow velocity exceeds the critical flow velocity, it is determined that the water flow scouring and destruction stage has begun, and the current state of the plant is determined;

[0010] If the current state is that the plant is overturned and damaged, the first water flow drag force on the plant above the ground is determined according to the root radius and shear strength of the plant below the ground and the height of the point where the water flow drag force acts on the plant above the ground;

[0011] If the current state is that the root system is completely out of the body, the second water flow drag force on the plant above the ground is determined based on the overall pull-out strength of the root system and the reduction coefficient of the pull-out strength of the root-soil composite aggregate;

[0012] Determining a first flow velocity when the plant is overturned and damaged according to the first water flow drag force;

[0013] Determining a second flow velocity when the root system is completely removed according to the second water flow drag force;

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

[0015] In a second aspect, the present application provides a device for determining plant ecological bank protection measures that are beneficial to anti-scour performance, comprising:

[0016] The plant revetment scouring rate determination module is used to determine the plant revetment scouring rate based on the scouring rate calculation formula during the water flow scouring start-up phase; the scouring rate calculation formula is corrected according to the scouring parameters; the scouring parameters include the shear stress at the soil-water interface;

[0017] The module for determining the current state of the plant is used to determine that the plant has entered the water flow scouring and destruction stage if the designed water flow velocity exceeds the critical flow velocity, and to determine the current state of the plant;

[0018] A first water flow drag force determination module is used to determine the first water flow drag force on the plant's above-ground part according to the root radius and shear strength of the plant below the ground and the height of the point where the water flow drag force is applied to the plant's above-ground part if the current state is that the plant is overturned and damaged;

[0019] A second water flow drag force determination module is used to determine the second water flow drag force on the plant's above-ground part according to the overall pull-out strength of the root system and the pull-out strength reduction coefficient of the root-soil composite aggregate if the current state is that the root system is completely out of the ground;

[0020] A first flow rate determination module, used to determine a first flow rate when the plant is overturned and damaged according to the first water flow drag force;

[0021] A second flow rate determination module, used to determine a second flow rate when the root system is completely out of the way according to the second water flow drag force;

[0022] The plant ecological bank protection measures 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.

[0023] In a third aspect, the present application provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any of the above-mentioned methods for determining plant ecological bank protection measures that are beneficial to anti-scour performance.

[0024] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for determining plant ecological bank protection measures that are beneficial to anti-scour performance.

[0025] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned methods for determining plant ecological bank protection measures that are beneficial to anti-scour performance.

[0026] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0027] The present application studies the scouring process, mechanism, quantitative expression and calculation formula of plant ecological bank protection in the water flow scouring start-up stage and the water flow scouring damage stage respectively. 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 under different states is determined according to the current state of the plant, and the flow velocity under different states is determined. Therefore, the scouring capacity of the river ecological bank protection is quantitatively evaluated according to the plant bank protection scouring rate, the first flow velocity and the second flow velocity in different stages, and plant ecological bank protection measures are formulated to measure the plant ecological bank protection's anti-scouring capacity and scouring damage standards, improve the management effect of the plant ecological bank protection measures, and provide a basis for related projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic flow chart of a method for determining a plant ecological bank protection measure that is beneficial to anti-scour performance in one embodiment of the present application;

[0030] Figure 2 A schematic diagram of a local depression of soil without vegetation cover first during the scouring process of a herbaceous vegetation revetment provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram showing that the root system of a herbaceous vegetation bank protection will be completely dislodged when it is damaged by scouring during scouring provided by an embodiment of the present application;

[0032] Figure 4 A vertical diagram of the stress state of a plant when it is turned over provided in an embodiment of the present application;

[0033] Figure 5 A top view of a plant under stress when it is turned over provided in one embodiment of the present application;

[0034] Figure 6 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0037] like Figure 1 As shown, the method for determining plant ecological bank protection measures that are beneficial to anti-scour performance provided in the embodiment of the present application is executed by a computer device, and can be specifically executed by a computer device such as a terminal or a server alone, or can be executed jointly by a terminal and a server. In the embodiment of the present application, the method includes the following steps.

[0038] A method for determining plant ecological bank protection measures that are beneficial to anti-scouring performance includes:

[0039] Step 101: During the water flow scouring start-up phase, the scouring rate of the plant bank protection is determined based on a scouring rate calculation formula; the scouring rate calculation formula is corrected based on scouring parameters; the scouring parameters include shear stress at the soil-water interface.

[0040] Step 102: If the designed water flow velocity exceeds the critical flow velocity, it is determined that the water flow scouring and destruction stage has begun, and the current state of the plant is determined.

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

[0042] Step 104: If the current state is that the root system is completely out of the body, determine the second water flow drag force on the plant's above-ground part based on the root system's overall pull-out strength and the root-soil composite aggregate's pull-out strength reduction coefficient.

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

[0044] Step 106: Determine a second flow velocity when the root system is completely dislodged according to the second water flow drag force.

[0045] Step 107: 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.

[0046] In an exemplary embodiment, step 101 may be replaced by the following steps: step 201 - step 203 .

[0047] Step 201: During the water flow scouring start-up phase, the shear stress at the soil-water interface is determined based on the shear force constant, the fluid velocity on the surface of the object, and the thickness of the soil layer when the parallel water flow decreases to 0 in the vertical infiltration process in the soil surface layer.

[0048] Step 202: Determine a scour rate calculation formula based on the shear stress-corrected super shear stress equation.

[0049] The flushing rate calculation formula is:

[0050] E=k vp ·U m

[0051] Where E is the scouring rate of plant revetment; k vp is the scour loss coefficient of the vegetation revetment surface under the set flow velocity, kU is the scour loss coefficient of the bank protection soil under the set flow velocity; p is the velocity reduction coefficient caused by vegetation; m is the power law exponent.

[0052] Step 203: Determine the scouring rate of the plant bank protection according to the scouring rate calculation formula.

[0053] Furthermore, in the scouring start-up stage, the soil in the area not covered by vegetation loosens first, and the water flow scours through the entire plant to the deep layer of the soil, and the scouring rate is calculated.

[0054] Firstly, the supershear stress equation is modified according to the scour initiation process.

[0055] The super shear stress equation before correction is:

[0056] E=k(τ0-τ c ) α (1)

[0057] Where E is the scouring rate of plant revetment, that is, the scouring rate of river bank soil per unit area, cm 3 / h / cm 2 ; τ0 is the shear stress at the soil-water interface, Pa; k is the scour loss coefficient, cm / h / Pa; τ c is the critical shear stress of the soil, Pa; α is the relationship between the scouring rate of the slope soil and the effective stress of the soil-water interface and the critical shear stress difference of the soil. It 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 hard object is exponentially related to the change in fluid velocity gradient. It is believed that the shear stress generated by the parallel fluid on the surface of the soil body on the surface of the object is calculated according to the following formula:

[0059]

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

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

[0062]

[0063] Substituting (3) into (1), removing the soil shear strength τ c, that is, it is believed that the scour loss coefficient k directly reflects the ability of the revetment soil to resist scour, and it may also cause soil loss at a very small flow rate:

[0064]

[0065] set up represents the scour loss coefficient caused by the near-bottom flow velocity v in the soil layer, and formula (4) can be written as:

[0066] E=k v ·v 0.5 (5)

[0067] Formula (5) can be written as the vertical average velocity form, assuming v = ξU, U is the vertical average velocity of the water flow, so that k U =k v ξ m , we can get the calculation formula of the flushing rate represented by the vertical average velocity:

[0068] E=k U ·U 0.5 (6)

[0069] When considering the velocity attenuation caused by surface vegetation interference, let v p =ξ p v, ξ p is the velocity reduction factor caused by vegetation, The calculation formula of vegetation revetment scouring rate is obtained:

[0070] E=k vp ·U 0.5 (7)

[0071] k in formulas (6) and (7) U , k vp They respectively represent the scour loss coefficients of the revetment soil and vegetation revetment surface under specific flow velocities, in units of cm / h / Pa, which can be obtained through experiments.

[0072] In an exemplary embodiment, during the scouring damage stage, when scouring continues to cause local depressions on the riverbank surface, such as Figure 2 As shown in the figure, the water flow continuously impacts the vegetation, the soil particles aggregated around the root system are continuously lost, the root-soil composite aggregates are no longer complete, and the slope vegetation has been deflected, lodged, or completely detached, causing damage. Figure 3 As shown. Based on the above two situations, the critical flow velocity of scour failure is calculated.

[0073] The scour damage calculation needs to consider the scour damage type. When the ground vegetation is high enough, the drag force of the water flow causes the vegetation to flip over, such as Figure 4-Figure 5 As shown. Let F tis the drag force of water flow received by the plant above the ground. Assume that when the plant deflects, the root system below the ground is a hemisphere with a radius of R, and the shear force of the soil on the surface of the hemisphere just turns over reaches the shear strength τ c , and there is no frictional dislocation between the hemisphere layers. The frictional braking effect of the scattered roots at the edge of the rotating hemisphere of the root-soil composite aggregate is ignored. The moment balance equation is established with the intersection of the main diameter of the plant and the ground as point o, as shown in the following formula (8).

[0074]

[0075] Simplified:

[0076]

[0077] Where: F t1 ——The water flow drag force received by the plant above the ground, that is, the first water flow drag force, N; h p ——The height of the point where the water flow drag force acts on the part of the plant above the ground, m; θ is the integral angle of the flipped hemisphere, which represents the angle between the central axis of a semicircular soil layer on the hemisphere and the radius R, and the integral range is -90°~90°.

[0078] When the ground vegetation is short and not large enough to flip over, such as stemless herbaceous plants, the roots will be pulled out as a whole when scouring occurs. In the critical state, the drag force on the plant is equal to the remaining overall tensile strength within the root burial depth.

[0079] F t2 =k t ·F max (10)

[0080] Where: k t is the reduction coefficient of the tensile strength of the root-soil composite aggregate, which can be determined based on the ratio of the specific surface area of ​​the soilless part of the root system to the overall specific surface area of ​​the root system when it is pulled out; F max is the overall tensile strength of the root system, N.

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

[0082] F t =0.5C D A p ρU 2 (11)

[0083] Where: F t =F t1 =F t2 , C D is the drag coefficient, generally 0.4; A p is the effective flushing area of ​​plants, m2 ; ρ is the water density.

[0084] Substituting formula (11) into (9) can obtain the first flow velocity calculation formula during overturning failure:

[0085]

[0086] Substituting formula (11) into (10) can obtain the second flow rate calculation formula when the plant breaks out:

[0087]

[0088] The above formulas (12) and (13) are the flow velocity calculation formulas when the vegetation revetment is damaged by scour and flipped over or detached.

[0089] According to the above calculation formula, when the river design standard and the design water flow velocity are known, on the one hand, it is possible to quantitatively evaluate the anti-scour capacity of the existing river ecological bank protection, or on the other hand, provide a design basis when designing bank protection vegetation.

[0090] Based on formula (12), it can be determined that when the plant root hemisphere flips over as a whole, shear sliding occurs between the surface of the sphere and the soil. The sliding surface is the surface of the sphere, and the sliding shear stress on the surface reaches the shear strength of the soil.

[0091] When conducting quantitative assessment, the scouring rate calculation of formula (7) can be used to determine the amount of soil scouring and scouring resistance that may be caused during the non-destructive stage when the existing revetment is subjected to the scouring of the design water flow; formula (13) can be used to determine how much water flow velocity can be withstood for scouring.

[0092] When designing bank protection vegetation, the maximum flow rate that the bank can withstand can be directly determined based on formula (13), or the type of plants that need to be matched can be determined. At the same time, formula (7) can be used to calculate how much soil loss may be caused by the designed vegetation when it is not damaged.

[0093] When the soil scouring loss caused by the designed vegetation is lower than a certain limit and the designed river flow velocity does not exceed the maximum destructive flow velocity, the designed river vegetation is considered to be safe and reliable. Therefore, the management effect of the plant ecological bank protection measures formulated based on the above is significant.

[0094] Based on the same inventive concept, the embodiment of the present application also provides a device for determining plant ecological bank protection measures that are conducive to anti-scour performance, which is used to implement the above-mentioned method for determining plant ecological bank protection measures that are conducive to anti-scour performance. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in one or more embodiments of the device for determining plant ecological bank protection measures that are conducive to anti-scour performance provided below can refer to the limitations of the method for determining plant ecological bank protection measures that are conducive to anti-scour performance above, and will not be repeated here.

[0095] In an exemplary embodiment, the present application provides a device for determining plant ecological bank protection measures that are beneficial to anti-scour performance, comprising:

[0096] The plant revetment scouring rate determination module is used to determine the plant revetment scouring rate based on the scouring rate calculation formula during the water flow scouring start-up phase; the scouring rate calculation formula is corrected according to the scouring parameters; the scouring parameters include the shear stress at the soil-water interface.

[0097] The module for determining the current state of the plant is used to determine that the plant has entered the water flow scouring and destruction stage if the designed water flow velocity exceeds the critical flow velocity, and to determine the current state of the plant.

[0098] The first water flow drag force determination module is used to determine the first water flow drag force on the above-ground part of the plant based on the root radius and shear strength of the plant below the ground and the height of the point where the water flow drag force acts on the above-ground part of the plant if the current state is that the plant is flipped over and damaged.

[0099] The second water flow drag force determination module is used to determine the second water flow drag force on the above-ground part of the plant according to the overall pull-out strength of the root system and the pull-out strength reduction coefficient of the root-soil composite aggregate if the current state is that the root system is completely out of place.

[0100] The first flow rate determination module is used to determine the first flow rate when the plant is overturned and damaged according to the first water flow drag force.

[0101] The second flow rate determination module is used to determine the second flow rate when the root system is completely out of the way according to the second water flow drag force.

[0102] The plant ecological bank protection measures 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.

[0103] This application can provide a basis for the design and maintenance of river ecological restoration projects, and provide quantitative guidance for vegetation engineering species configuration, anti-scouring effect assessment, and shallow bank protection stability and safety analysis.

[0104] The scouring and damaging flow rate finally determined by this application can be compared with the design flow rate of the river to determine the flood flow rate equivalent to the design frequency standard. For example, if it is close to the flood standard of a river with a return period of 50 years, the construction standard of vegetation can be considered to be a return period of 50 years. When the design standard of the river is determined, plants that are stable under this standard condition can be selected. The vegetation engineering determined by the scouring and damaging flow rate in this application can be combined with engineering hydrological analysis to apply to the design standard of river ecological governance engineering, providing an accurate basis for the design recurrence period of bank protection vegetation, which has practical significance in the protection and restoration of river ecosystems.

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

[0106] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 6 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to 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 bank protection measures that are beneficial to anti-scouring performance. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for determining plant ecological bank protection measures that are beneficial to anti-scouring performance is implemented.

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

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

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

[0110] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and 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-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ReadOnlyMemory, ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (Magnetoresistive RandomAccess Memory, MRAM), ferroelectric random access memory (Ferroelectric RandomAccess Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory can include random access memory (RandomAccess Memory, RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0111] In this application, all actions to obtain signals, information or data are carried out in compliance with the relevant data protection laws and policies of the country where they are located and with the authorization given by the owner of the corresponding device.

[0112] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0113] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0114] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for determining plant ecological bank protection measures that are beneficial to anti-scour performance, characterized in that: The method for determining the plant ecological bank protection measures that are beneficial to anti-scour performance includes: In the water flow scouring start-up stage, the scouring rate of the plant bank protection is determined 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 flow velocity, it is determined that the water flow scouring and destruction stage has begun, and the current state of the plant is determined; If the current state is that the plant is overturned and damaged, the first water flow drag force on the plant above the ground is determined according to the root radius and shear strength of the plant below the ground and the height of the point where the water flow drag force acts on the plant above the ground; If the current state is that the root system is completely out of the body, the second water flow drag force on the plant above the ground is determined based on the overall pull-out strength of the root system and the reduction coefficient of the pull-out strength of the root-soil composite aggregate; Determining a first flow velocity when the plant is overturned and damaged according to the first water flow drag force; Determining a second flow velocity when the root system is completely removed according to the second water flow drag force; The scouring capacity of the river ecological bank protection is quantitatively evaluated based on the plant bank protection scouring rate, the first flow velocity and the second flow velocity, and plant ecological bank protection measures are formulated.

2. The method for determining plant ecological bank protection measures that are beneficial to anti-scour performance according to claim 1 is characterized in that: In the water flow scouring start-up stage, the scouring rate of the plant bank protection is determined based on the scouring rate calculation formula, including: At the start-up stage of water flow scouring, the shear stress at the soil-water interface is determined based on the shear force constant, the fluid velocity on the surface of the object, and the thickness of the soil layer when the parallel water flow decreases to 0 in the process of vertical infiltration in the surface layer of the soil layer; Determine the scour rate calculation formula based on the shear stress modified super shear stress equation; The scouring rate of the plant revetment is determined according to the scouring rate calculation formula.

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

4. The method for determining plant ecological bank protection measures that are beneficial to anti-scour performance according to claim 1 is characterized in that: The first water flow drag force F t1 for: Among them, h p is the height of the point where the water flow drag force acts on the plant above the ground; R is the root radius of the plant below the ground; τ c is the critical shear stress of soil; The second water flow drag force F t2 for F t2 =k t ·F max Among them, k t F is the reduction factor of tensile strength of root-soil composite aggregates; max It is the overall tensile strength of the root system.

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

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

7. A device for determining plant ecological bank protection measures that is beneficial to anti-scour performance, characterized in that: The device for determining plant ecological bank protection measures that are beneficial to anti-scour performance includes: A plant revetment scouring rate determination module is used to determine the plant revetment scouring rate based on a scouring rate calculation formula during the water flow scouring start-up phase; the scouring rate calculation formula is corrected according to scouring parameters; the scouring parameters include shear stress at the soil-water interface; The module for determining the current state of the plant is used to determine that the plant has entered the water flow scouring and destruction stage if the designed water flow velocity exceeds the critical flow velocity, and to determine the current state of the plant; A first water flow drag force determination module is used to determine the first water flow drag force on the plant's above-ground part according to the root radius and shear strength of the plant below the ground and the height of the point where the water flow drag force is applied to the plant's above-ground part if the current state is that the plant is overturned and damaged; A second water flow drag force determination module is used to determine the second water flow drag force on the plant's above-ground part according to the overall pull-out strength of the root system and the pull-out strength reduction coefficient of the root-soil composite aggregate if the current state is that the root system is completely out of the ground; A first flow rate determination module, used to determine a first flow rate when the plant is overturned and damaged according to the first water flow drag force; A second flow rate determination module, used to determine a second flow rate when the root system is completely out of the way according to the second water flow drag force; The plant ecological bank protection measures 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 in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for determining plant ecological bank protection measures having anti-scour performance as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for determining plant ecological bank protection measures that are beneficial to anti-scour performance described in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for determining plant ecological bank protection measures that are beneficial to anti-scour performance described in any one of claims 1 to 6 is implemented.

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