CN117571505B - Device and method for measuring critical shear force of fine groove erosion - Google Patents
Device and method for measuring critical shear force of fine groove erosion Download PDFInfo
- Publication number
- CN117571505B CN117571505B CN202410045250.0A CN202410045250A CN117571505B CN 117571505 B CN117571505 B CN 117571505B CN 202410045250 A CN202410045250 A CN 202410045250A CN 117571505 B CN117571505 B CN 117571505B
- Authority
- CN
- China
- Prior art keywords
- critical shear
- erosion
- shear force
- water tank
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003628 erosive effect Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000002689 soil Substances 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000002245 particle Substances 0.000 claims abstract description 57
- 230000035772 mutation Effects 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 238000012417 linear regression Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000004062 sedimentation Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 230000003068 static effect Effects 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 238000010008 shearing Methods 0.000 claims description 19
- 238000005259 measurement Methods 0.000 abstract description 11
- 230000000007 visual effect Effects 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000000691 measurement method Methods 0.000 abstract description 3
- 238000004162 soil erosion Methods 0.000 description 9
- 238000000926 separation method Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device and a method for measuring critical shear force of fine groove erosion, wherein the device comprises the following components: the device comprises a water tank, a soil sample chamber, an observation bottom plate, a camera, a sedimentation tank, a drainage pipe network, a water tank, a water pump, a flow regulating valve, an electromagnetic flowmeter, a water pipe and a static water tank; the method adopts a method combining water tank experiment, graphic analysis and numerical analysis to measure critical shear force of the fine ditch erosion, the device is integrated with a camera and an image processing device, and the starting state of soil particles is analyzed in a graphic analysis processing mode. The relation between the area of the soil particles and the critical shear force is analyzed by numerical analysis methods such as linear regression, pettitt mutation test and the like, the starting mutation points of the soil particles are defined, the critical shear force of the fine trench erosion is objectively determined, the subjectivity of visual observation of experimental staff is avoided by the measurement method, objective and unified discrimination criteria are provided in the measurement process, and the specific reliability of the measurement result is high.
Description
Technical Field
The invention relates to the technical field of measurement of critical shearing force of fine groove erosion, in particular to a device and a method for measuring critical shearing force of fine groove erosion.
Background
The soil erosion model is an important technical tool for understanding the soil erosion process, optimizing the water and soil resource utilization and guiding the configuration of water and soil conservation measures. The physical cause model-based model has been a hotspot for soil erosion researchers for decades. Among the many physical-causative soil erosion models, the WEPP model (Water Erosion Prediction Project) in the united states is the most complete and complex soil erosion model to date internationally. In a physical causative soil erosion model typified by WEPP, erosion processes are classified into inter-fine erosion and fine erosion. The erodibility and critical shear force (both are commonly called soil erosion resistance) of the fine furrows are important input parameters for simulating the soil erosion process of the fine furrows, the linear regression determination is generally carried out on the soil separation capacity and the water flow shear force by adopting a linear model method in WEPP, and the accuracy of the parameters is significant for improving the forecasting accuracy of the soil erosion model.
In recent decades, researchers at home and abroad have made a great deal of research on the erodibility of the fine grooves and critical shear force determined by the linear model method. The views of researchers at home and abroad on the erodibility of the fine groove determined by the linear model method are consistent, however, the critical shearing force determined by the linear model method is in great dispute, and many scientific problems related to the critical shearing force are to be further questionable. The critical shear force determined by the linear model method sometimes has a negative value, obviously is not in agreement with the actual situation, and has large difference in many research results in terms of the relationship with gradient, soil physicochemical property, root system density, fine groove corrodibility and the like, and some research results are even quite opposite. Unlike the method of determining critical shear force of fine erosion by the linear model method, some prior arts employ a method of gradually increasing the flow rate until the critical separation condition of soil particles (state of continuous separation of soil particles) is reached to determine the critical shear force of fine erosion, exhibit good experimental results, and indicate that the method can be used for determination of critical shear force. Soil particle start-up can be divided into 4 phases: (a) A low water flow rate stage, wherein soil particles present accidental and discontinuous starting states; (b) As the flow rate of the water increases, more and more soil particles start, with larger soil particles starting; (c) soil particle start-up continues to enhance; (d) The soil particle start sudden increase phase, the soil particle start sudden increase is expressed in terms of the number of soil particles and the size of the soil particles. Different researchers determine that there is a difference in the start-up stages of soil particles corresponding to critical shear forces of fine erosion, and a learner determines the critical shear forces in stage a and d.
However, the method of determining the critical shear force of the fine ditch erosion by gradually increasing the flow until the critical separation condition of the soil particles is reached usually adopts a visual observation method of experimenters, and the measurement result is often different according to different experimenters and discrimination standards, has larger subjectivity and lacks unified standards, so that the objectivity of the measurement result is questioned. Therefore, there is a need for an apparatus and method for determining critical shear forces for trench erosion that solves the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a device and a method for measuring critical shear force of fine groove erosion, aiming at overcoming the defects of the prior art, and solving the problems that the conventional method for measuring the critical shear force of fine groove erosion by visual observation usually adopts visual observation of experimenters, the measurement results often differ according to different experimenter discrimination standards, the subjectivity is high, the comparability of the measurement results is poor, and the objectivity of the measurement results is questioned.
The invention provides a device for measuring critical shear force of fine groove erosion, which comprises: the device comprises a water tank, a soil sample chamber, an observation bottom plate, a camera, a sedimentation tank, a drainage pipe network, a water tank, a water pump, a flow regulating valve, an electromagnetic flowmeter, a water pipe and a static water tank; the bottom slope of the water tank is adjustable, the water stilling tank is arranged below the bottom of one end of the water tank, the soil sample chamber is arranged below the bottom of the other end of the water tank, and the observation bottom plate is arranged at the bottom of the other end of the water tank and is positioned outside the soil sample chamber; the camera is arranged above the observation bottom plate and is connected with the image processing device; the basin is provided with the outlet in the outside of observing the bottom plate, the sedimentation tank set up in the outlet below, the sedimentation tank passes through drainage pipe network is connected to the lateral wall in pond, the water pump set up in the pond, the water pump pass through the water pipe with still pond one side bottom is connected, flow control valve, electromagnetic flowmeter set up in on the water pipe.
Further, one end upper side of the water tank is connected to the pulley block.
Further, the observation base plate is a white observation base plate.
The invention provides a method for measuring critical shear force of fine erosion, which is applied to the device for measuring critical shear force of fine erosion, and comprises the following steps:
firstly, placing a soil sample in a soil sample chamber, starting a water pump, regulating a flow regulating valve, slowly increasing the flow, observing the carrying condition of soil particles in the soil sample chamber until massive continuous starting of the soil particles in the soil sample chamber is observed, taking a picture of the soil particles carried along with water flow on an observation bottom plate by a camera during the period, and simultaneously automatically recording the water flow of the corresponding picture by an electromagnetic flowmeter;
the image processing device receives the photo shot by the camera, processes the photo to obtain the quantity and the area of the soil particles, and further characterizes the starting state of the soil particles at different stages;
and thirdly, analyzing the relation between the area of the soil particles and the critical shearing force by a numerical analysis method, determining starting mutation points of the soil particles, and objectively determining the critical shearing force of the fine groove erosion.
Further, in the third step, the critical shear force corresponding to each photo is calculated according to the following formula:
wherein τ is a critical shear force; gamma is the volume weight of water flow, and the unit is N/m 3 The method comprises the steps of carrying out a first treatment on the surface of the S is the gradient of the water tank, and the unit is; r is a hydraulic radius, the unit is m, and the hydraulic radius is obtained by using a flow and Manning formula; n is the Manning roughness coefficient; q is flow, unit is m 3 /s。
Further, the third step adopts a linear regression method to determine the critical shearing force of the fine groove erosion.
Further, the third step includes:
drawing a graph of soil particle areas and critical shear forces corresponding to different photos;
and determining the critical shear force corresponding to the intersection point of the linear regression line of the slow critical shear force increasing stage and the linear regression line of the fast critical shear force increasing stage as the critical shear force of the fine ditch erosion of the soil sample.
Further, the third step adopts Pettitt mutation test method to determine critical shearing force of the fine groove erosion.
Further, the third step includes:
time series of critical shear forces for fine groove erosion（t∈[1，n]N is the sequence length), construct the statistics sequence +.>：
，/>The value is 1;
，/>the value is 0;
，/>the value is-1; j E [1, t]；
Defining statisticsIf the time t satisfies the following conditions:
the critical shear force corresponding to time t is determined as the critical shear force of the soil sample for trench erosion.
The invention has the following beneficial effects: the device and the method for measuring the critical shearing force of the fine trench erosion, provided by the invention, adopt a method of combining a water tank experiment, graphic analysis and numerical analysis to measure the critical shearing force of the fine trench erosion, integrate a camera and an image processing device, and analyze the starting state of soil particles in a graphic analysis processing mode. The relation between the area of the soil particles and the critical shear force is analyzed by numerical analysis methods such as linear regression, pettitt mutation test and the like, the starting mutation points of the soil particles are defined, the critical shear force of the fine trench erosion is objectively determined, the subjectivity of visual observation of experimental staff is avoided by the measurement method, objective and unified discrimination criteria are provided in the measurement process, and the specific reliability of the measurement result is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of an apparatus for determining critical shear forces for fine groove erosion according to the present invention;
FIG. 2 is a top view of an apparatus for determining critical shear forces for fine groove erosion according to the present invention;
FIG. 3 is a photograph of different soil particle initiation phases;
FIG. 4 is a graph of soil particle area versus critical shear force.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be appreciated that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, thicknesses of layers and regions are exaggerated for clarity, and identical reference numerals are used to denote identical devices, and thus descriptions thereof will be omitted.
Referring to FIGS. 1 and 2, an apparatus for determining critical shear force for trench erosion is provided according to an embodiment of the present invention, comprising: the soil sample device comprises a water tank 1, a soil sample chamber 2, an observation bottom plate 3, a camera 4, a sedimentation tank 5, a drainage pipe network 6, a water tank 7, a water pump 8, a flow regulating valve 9, an electromagnetic flowmeter 10, a water pipe 11, a static water tank 12 and a pulley block 13.
Wherein, the tank bottom gradient of the water tank 1 is adjustable, the length of the water tank 1 is 455cm, and the width is 30cm. The water-static pool 12 is arranged below the bottom of one end of the water tank 1, the water-static pool 12 is used for enabling water to slowly flow out and flow into the water tank 1, the small soil sample chamber 2 is arranged below the bottom of the other end of the water tank 1, and the soil sample chamber 2 is of a cylindrical structure with the diameter of 10 cm. The observation bottom plate 3 is arranged at the bottom of the other end of the water tank 1 and is positioned at the outer side of the soil sample chamber 2, the observation bottom plate 3 is a white observation bottom plate, and the observation bottom plate 3 is 16cm long and 16cm wide.
The camera 4 is disposed above the observation base plate 3, and the camera 4 is connected to the image processing apparatus. The basin 1 is provided with the outlet in the outside of observing bottom plate 3, and sedimentation tank 5 sets up in the outlet below, and sedimentation tank 5 is connected to the lateral wall of pond 7 through drain pipe network 6, and the water that basin 1 washed down has silt, and after sedimentation tank 5 deposits, the clear water flows out, reduces pond 7 siltation. The pool 7 is 100m 3 And (5) a pool. The water pump 8 is arranged in the water tank 7, the water pump 8 is connected with the bottom of one side of the static water tank 12 through a water pipe 11, and the flow regulating valve 9 and the electromagnetic flowmeter 10 are arranged on the water pipe 11. One end top of basin 1 is connected to assembly pulley 13, and the one end of accessible assembly pulley 13 lift basin 1 changes basin 1 slope, and then determines the rivers shearing force under the different slopes.
Based on the device for measuring the critical shearing force of the fine erosion, the invention provides a method for measuring the critical shearing force of the fine erosion, which comprises the following steps:
firstly, placing a soil sample in a soil sample chamber, starting a water pump, adjusting a flow regulating valve, slowly increasing flow, observing the carrying condition of soil particles in the soil sample chamber until massive continuous starting of the soil particles in the soil sample chamber is observed, taking a picture of the soil particles carried along with water flow on an observation bottom plate by a camera during the period, and simultaneously automatically recording the water flow of the corresponding picture by an electromagnetic flowmeter.
Specifically, until a large continuous start of soil particles is observed in the soil sample chamber, the camera takes about 100 pictures of the soil particles carried with the water flow on the observation floor during this period.
And step two, the image processing device receives the photo shot by the camera, processes the photo to obtain the quantity and the area of the soil particles, and further characterizes the starting state of the soil particles in different stages.
Specifically, the image processing device can process the photos through ENVI and ERDAS to obtain photos of different soil particle starting stages, and the photos are shown in fig. 3 in detail. Black represents ground colour and white represents soil particles, wherein the four phases a, b, c and d and "(a) low water flow rate phase, the soil particles present occasional discontinuous starting state; (b) As the flow rate of the water increases, more and more soil particles start, with larger soil particles starting; (c) soil particle start-up continues to enhance; (d) The soil particle starting sudden-enhancement phase is characterized in that the four phases of the consistent soil particle quantity and the consistent soil particle size are consistent.
And thirdly, analyzing the relation between the area of the soil particles and the critical shearing force by a numerical analysis method, determining starting mutation points of the soil particles, and objectively determining the critical shearing force of the fine groove erosion.
Specifically, the critical shear force corresponding to each photo is calculated according to the following formula:
τ=γ·r·S
wherein τ is a critical shear force; gamma is the volume weight of water flow, and the unit is N/m 3 The method comprises the steps of carrying out a first treatment on the surface of the S is the gradient of the water tank, and the unit is; r is a hydraulic radius, the unit is m, and the hydraulic radius is obtained by using a flow and Manning formula; n is the Manning roughness coefficient; q is flow, unit is m 3 /s。
Referring to fig. 4, the determining the critical shearing force of the fine groove erosion by the linear regression method includes: the invention adopts a common critical shear force judging method of the soil eroded by the fine ditches, namely, the critical point of the starting of obvious soil particles (Knapen et al, 2007). Drawing a graph of soil particle areas and critical shear forces corresponding to different photos; and determining the critical shear force corresponding to the intersection point of the linear regression line of the slow critical shear force increasing stage and the linear regression line of the fast critical shear force increasing stage as the critical shear force of the fine ditch erosion of the soil sample.
And step three, a Pettitt mutation test method can be adopted to determine the critical shearing force of the fine groove erosion, the Pettitt mutation test method takes the change of the element sequence trend as a precondition, the specific time of mutation is judged according to the change rule of the sequence mean value, a plurality of mutation points can be obtained from the test result, and finally, the optimal mutation points are required to be determined according to the actual situation and specific reasons. The method specifically comprises the following steps: time series of critical shear forces for fine groove erosion（t∈[1，n]N is the sequence length), construct the statistics sequence +.>：
，/>The value is 1;
，/>the value is 0;
，/>the value is-1; j E [1, t]；
Defining statisticsIf the time t satisfies the following conditions:
the critical shear force corresponding to time t is determined as the critical shear force of the soil sample for trench erosion.
As can be seen from the above examples, the device and the method for measuring critical shear force of fine groove erosion, disclosed by the invention, adopt a method of combining a water tank experiment, computer graphic analysis and numerical analysis to measure the critical shear force of fine groove erosion, and the measurement method avoids subjectivity of visual observation of experimenters, and has a specific and strong credibility of measurement results.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An apparatus for determining critical shear forces for trench erosion comprising: the device comprises a water tank (1), a soil sample chamber (2), an observation bottom plate (3), a camera (4), a sedimentation tank (5), a drainage pipe network (6), a water tank (7), a water pump (8), a flow regulating valve (9), an electromagnetic flowmeter (10), a water pipe (11) and a static water tank (12);
the bottom slope of the water tank (1) is adjustable, the water stilling tank (12) is arranged below the bottom of one end of the water tank (1), the soil sample chamber (2) is arranged below the bottom of the other end of the water tank (1), and the observation bottom plate (3) is arranged at the bottom of the other end of the water tank (1) and is positioned outside the soil sample chamber (2); the camera (4) is arranged above the observation base plate (3), and the camera (4) is connected with an image processing device; the water tank (1) is provided with the outlet in the outside of observing bottom plate (3), sedimentation tank (5) set up in outlet below, sedimentation tank (5) are connected to through drainage pipe network (6) the lateral wall of pond (7), water pump (8) set up in pond (7), water pump (8) pass through water pipe (11) with still pond (12) one side bottom is connected, flow control valve (9), electromagnetic flowmeter (10) set up in on water pipe (11).
2. Device for determining critical shear forces for fine erosion according to claim 1, characterized in that the water tank (1) is connected above one end to a pulley block (13).
3. A device for determining critical shear forces for fine erosion according to claim 1, wherein the observation base (3) is a white observation base.
4. A method of determining critical shear forces for sipe erosion using the apparatus for determining critical shear forces for sipe erosion of claim 1, said method comprising the steps of:
firstly, placing a soil sample in a soil sample chamber, starting a water pump, regulating a flow regulating valve, slowly increasing the flow, observing the carrying condition of soil particles in the soil sample chamber until massive continuous starting of the soil particles in the soil sample chamber is observed, taking a picture of the soil particles carried along with water flow on an observation bottom plate by a camera during the period, and simultaneously automatically recording the water flow of the corresponding picture by an electromagnetic flowmeter;
the image processing device receives the photo shot by the camera, processes the photo to obtain the quantity and the area of the soil particles, and further characterizes the starting state of the soil particles at different stages;
and thirdly, analyzing the relation between the area of the soil particles and the critical shearing force by a numerical analysis method, determining starting mutation points of the soil particles, and objectively determining the critical shearing force of the fine groove erosion.
5. The method of claim 4, wherein in the third step, the critical shear force corresponding to each photo is calculated according to the following formula:
wherein τ is a critical shear force; gamma is the volume weight of water flow, and the unit is N/m 3 The method comprises the steps of carrying out a first treatment on the surface of the S is the gradient of the water tank, and the unit is; r is a hydraulic radius, the unit is m, and the hydraulic radius is obtained by using a flow and Manning formula; n is the Manning roughness coefficient; q is flow, unit is m 3 /s。
6. The method of claim 5, wherein the third step uses a linear regression method to determine the critical shear force for the sipe erosion.
7. The method of determining critical shear for fine erosion as in claim 6, wherein said step three comprises:
drawing a graph of soil particle areas and critical shear forces corresponding to different photos;
and determining the critical shear force corresponding to the intersection point of the linear regression line of the slow critical shear force increasing stage and the linear regression line of the fast critical shear force increasing stage as the critical shear force of the fine ditch erosion of the soil sample.
8. The method of claim 5, wherein the third step uses Pettitt mutation test to determine the critical shear force.
9. The method of determining critical shear for fine erosion as in claim 8, wherein said step three comprises:
time series of critical shear forces for fine groove erosion，t∈[1，n]N is the sequence length, construct statistics sequence->：
，/>The value is 1;
，/>the value is 0;
，/>the value is-1; j E [1, t]；
Defining statisticsIf the time t satisfies the following conditions:
the critical shear force corresponding to time t is determined as the critical shear force of the soil sample for trench erosion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410045250.0A CN117571505B (en) | 2024-01-12 | 2024-01-12 | Device and method for measuring critical shear force of fine groove erosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410045250.0A CN117571505B (en) | 2024-01-12 | 2024-01-12 | Device and method for measuring critical shear force of fine groove erosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117571505A CN117571505A (en) | 2024-02-20 |
| CN117571505B true CN117571505B (en) | 2024-03-22 |
Family
ID=89862607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410045250.0A Active CN117571505B (en) | 2024-01-12 | 2024-01-12 | Device and method for measuring critical shear force of fine groove erosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117571505B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101029282B1 (en) * | 2010-03-30 | 2011-04-18 | 한국건설기술연구원 | Method for estimation of discharge using the measured stage data at the cross-sections with lateral change of roughness |
| CN102288741A (en) * | 2011-07-14 | 2011-12-21 | 中国科学院水利部成都山地灾害与环境研究所 | Method for rapidly measuring rill erodibility of soil |
| CN103969129A (en) * | 2013-01-30 | 2014-08-06 | 张树森 | Test equipment and method of soil erosion critical shearing stress and erosion constant |
| CN105445137A (en) * | 2015-11-23 | 2016-03-30 | 中国科学院东北地理与农业生态研究所 | Sloping plot scale rill erosion three-dimensional dynamic monitoring method based on photographing |
| CN205374200U (en) * | 2016-01-11 | 2016-07-06 | 四川农业大学 | Thin ditch form change monitoring device |
| KR101940504B1 (en) * | 2018-01-18 | 2019-01-21 | 국토연구원 | Simulation method and apparatus for predicting damage in downtown area due to landslide |
| CN111985164A (en) * | 2020-07-10 | 2020-11-24 | 江苏省海洋资源开发研究院(连云港) | River flow prediction method based on fluid power and piecewise Manning formula |
| CN112485149A (en) * | 2021-01-06 | 2021-03-12 | 临沂大学 | Test device for continuously measuring soil erosion depth |
| CN113533123A (en) * | 2021-08-06 | 2021-10-22 | 中山大学 | Triaxial soil sample seepage erosion and shear test device and test method thereof |
| CN114942199A (en) * | 2022-05-07 | 2022-08-26 | 水利部交通运输部国家能源局南京水利科学研究院 | Simulation test device and test method for overtopping erosion/scouring process of dam |
| CN115510377A (en) * | 2022-11-23 | 2022-12-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Soil erosion intensity estimation method, system and storage medium |
| CN115979900A (en) * | 2022-12-29 | 2023-04-18 | 中国地质科学院岩溶地质研究所 | Underground water circulation factor monitoring method based on northern full-drainage karst springs |
| CN116187192A (en) * | 2023-02-17 | 2023-05-30 | 中国水利水电科学研究院 | Slope tillage land ridge ditch layout optimization method for soil erosion control |
-
2024
- 2024-01-12 CN CN202410045250.0A patent/CN117571505B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101029282B1 (en) * | 2010-03-30 | 2011-04-18 | 한국건설기술연구원 | Method for estimation of discharge using the measured stage data at the cross-sections with lateral change of roughness |
| CN102288741A (en) * | 2011-07-14 | 2011-12-21 | 中国科学院水利部成都山地灾害与环境研究所 | Method for rapidly measuring rill erodibility of soil |
| CN103969129A (en) * | 2013-01-30 | 2014-08-06 | 张树森 | Test equipment and method of soil erosion critical shearing stress and erosion constant |
| CN105445137A (en) * | 2015-11-23 | 2016-03-30 | 中国科学院东北地理与农业生态研究所 | Sloping plot scale rill erosion three-dimensional dynamic monitoring method based on photographing |
| CN205374200U (en) * | 2016-01-11 | 2016-07-06 | 四川农业大学 | Thin ditch form change monitoring device |
| KR101940504B1 (en) * | 2018-01-18 | 2019-01-21 | 국토연구원 | Simulation method and apparatus for predicting damage in downtown area due to landslide |
| CN111985164A (en) * | 2020-07-10 | 2020-11-24 | 江苏省海洋资源开发研究院(连云港) | River flow prediction method based on fluid power and piecewise Manning formula |
| CN112485149A (en) * | 2021-01-06 | 2021-03-12 | 临沂大学 | Test device for continuously measuring soil erosion depth |
| CN113533123A (en) * | 2021-08-06 | 2021-10-22 | 中山大学 | Triaxial soil sample seepage erosion and shear test device and test method thereof |
| CN114942199A (en) * | 2022-05-07 | 2022-08-26 | 水利部交通运输部国家能源局南京水利科学研究院 | Simulation test device and test method for overtopping erosion/scouring process of dam |
| CN115510377A (en) * | 2022-11-23 | 2022-12-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Soil erosion intensity estimation method, system and storage medium |
| CN115979900A (en) * | 2022-12-29 | 2023-04-18 | 中国地质科学院岩溶地质研究所 | Underground water circulation factor monitoring method based on northern full-drainage karst springs |
| CN116187192A (en) * | 2023-02-17 | 2023-05-30 | 中国水利水电科学研究院 | Slope tillage land ridge ditch layout optimization method for soil erosion control |
Non-Patent Citations (2)
| Title |
|---|
| 水力梯度影响下WEPP模型估计细沟侵蚀参数的可行性分析;王晨沣;马超;王玉杰;王彬;王云琦;张会兰;;农业工程学报;20170423(第08期);全文 * |
| 细沟侵蚀可蚀性参数及土壤临界抗剪应力的有理(实验)求解方法;张晴雯, 雷廷武, 潘英华, 高佩玲;中国科学院研究生院学报;20040715(第04期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117571505A (en) | 2024-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Glass et al. | A modified invasion percolation model for low‐capillary number immiscible displacements in horizontal rough‐walled fractures: Influence of local in‐plane curvature | |
| Diomampo et al. | Relative permeability through fractures | |
| Khatibi et al. | Modelling energy dissipation over stepped-gabion weirs by artificial intelligence | |
| Al-Madhhachi et al. | Mechanistic detachment rate model to predict soil erodibility due to fluvial and seepage forces | |
| Grau et al. | Gas dispersion measurements in a flotation cell | |
| JPH0627014A (en) | Method and apparatus for monitoring contamination of water | |
| Hernandez | A technique for the direct measurement of bubble size distributions in industrial flotation cells | |
| CN205620284U (en) | Rainfall simulation is to slope stability's analyzed experiment device | |
| Orlob | Eddy diffusion in homogeneous turbulence | |
| CN117571505B (en) | Device and method for measuring critical shear force of fine groove erosion | |
| Asadollahzadeh et al. | Using maximum entropy, Gamma, Inverse Gaussian and Weibull approach for prediction of drop size distribution in a liquid–liquid extraction column | |
| Isaacson et al. | Plume dilution for diffusers with multiport risers | |
| Ballu et al. | Experimental-based methodology to improve the design of vertical slot fishways | |
| Paterson et al. | Flow-driven compaction of a fibrous porous medium | |
| CN111651855A (en) | Physical model-based river network area water quality section pollution contribution rate accounting method | |
| WO2024104508A1 (en) | Pore-network-based gas-liquid relative permeability prediction method during foam drainage process | |
| Mojtahedi et al. | Energy dissipation evaluation for stepped spillway using a fuzzy inference system | |
| Lovick | Horizontal, oil-water flows in the dual continuous flow regime | |
| Geissler et al. | Dynamic model of crossflow microfiltration in flat-channel systems under laminar flow conditions | |
| Kocabaş et al. | Estimation of critical submergence for an intake in a stratified fluid media by neuro-fuzzy approach | |
| CN108572056B (en) | River and lake water and sand mutual feedback experiment monitoring system and method under complex conditions | |
| CN208537135U (en) | One kind is for the husky mutually feedback experimental monitoring system of complex condition river and lake water | |
| Zeinivand et al. | The discharge coefficient of sharp triangular weir pierced by orifices | |
| Loubser et al. | Modelling juice flow in a shredded cane bed. | |
| Chowdhury | Assessment of flow conditions in a new vortex-type stormwater retention pond using a physical model |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |