CN114019144B - Device and method for quantitatively distinguishing erosion amount of slope laminar flow and erosion amount of fine groove - Google Patents
Device and method for quantitatively distinguishing erosion amount of slope laminar flow and erosion amount of fine groove Download PDFInfo
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- 230000003628 erosive effect Effects 0.000 title claims abstract description 194
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000002689 soil Substances 0.000 claims abstract description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 238000005507 spraying Methods 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 7
- 239000013049 sediment Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims 1
- 238000004162 soil erosion Methods 0.000 abstract description 14
- 238000005070 sampling Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000691 measurement method Methods 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract 1
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- 239000002994 raw material Substances 0.000 description 3
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- 238000005303 weighing Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01—MEASURING; TESTING
- G01G—WEIGHING
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Abstract
The invention provides a device and a method for quantitatively distinguishing slope sheet flow erosion amount and fine ditch erosion amount, wherein more than one soil groove is arranged on a test platform and used for filling soil, the soil grooves are mutually parallel and are formed by two lateral plates with a certain interval, the interval between the two lateral plates forms the width of the soil groove, and the top ends of the two lateral plates are provided with upper baffles; the lower end of each soil tank is provided with a current collecting barrel; the water spraying head is connected with a water spraying pipeline with a control device, water with a certain pressure is input into the water spraying pipeline, and the water is sprayed into the soil tank through the water spraying head. By spraying water into the soil slope of the soil tank, the erosion of the soil slope in the soil tank by rainfall is simulated, and the critical slope length from slope sheet erosion to fine ditch erosion transformation can be effectively positioned; the manufacturing process is simple, and the use and measurement method are convenient; disturbance to the water flow section in the sampling process is eliminated, and accuracy in the soil erosion amount measuring process is improved.
Description
Technical Field
The invention relates to the technical field of soil erosion amount measurement, in particular to a device and a method for quantitatively distinguishing slope sheet flow erosion amount from fine ditch erosion amount.
Background
Slope is the main source of soil loss, and soil erosion caused by slope gradually develops and evolves along with time and space. As the slope length increases, the rainfall laminar flows are collected, and when a certain slope length is reached, the laminar flows gradually form concentrated water flow. Under the action of concentrated water flow, soil erosion increases sharply, tiny channels are gradually formed on the eroded slope, and the erosion process gradually evolves from flake erosion to fine channel erosion. The fine groove erosion is a key erosion process of the development of the flake erosion to the ditch erosion, the generation of the fine groove marks the change of the main erosion mode of the slope, the slope erosion power is changed essentially along with the generation and the development of the fine groove, and the erosion force and the carrying capacity of the fine groove are obviously larger than those of the slope flake water flow. The laminar erosion and the fine groove erosion of the soil slope are two inter-connected erosion process chains in space, and the laminar erosion and the fine groove erosion are researched as a whole, so that the law of the slope rainfall erosion evolution process can be better conformed. And the slope erosion process is continuously converted and evolved along with the rainfall duration and the spatial position, and quantitative distinction of the laminar erosion process and the fine ditch erosion process becomes a difficulty of research.
In the research of the existing slope erosion along with the spatial change characteristic of slope length, the soil erosion amount is mostly measured by adopting an along-path sampling method, and the method has the defects that the sampling can cause disturbance of the along-path water flow section, more manpower is required, and the measurement result is inaccurate due to human errors.
In addition, the soil erosion amount is also commonly measured by adopting a method of along-path sectional flushing, and the method has the defect that repeated flushing of the part at the outlet of the soil tank is omitted, and the accuracy of the measurement result cannot be verified.
At present, in the technology for quantitatively researching the space change rule of rainfall sheet erosion and fine ditch erosion, the REE element tracing method is adopted to measure erosion amounts of different terrain positions, so that the erosion amount of the soil slope sheet flow is quantitatively researched.
However, in some existing soil erosion amount measurement methods, laminar erosion or fine erosion is studied as two independent erosion processes, the difference between laminar erosion and fine erosion is ignored, and the difference exists between the laminar erosion and the fine erosion and the actual slope rainfall erosion process, and the method and the device for distinguishing the slope laminar erosion from the fine erosion evolution process are not proposed or improved.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and aims at providing a device and a method for quantitatively distinguishing the erosion amount of a slope laminar flow from the erosion amount of a fine ditch; firstly, the device for distinguishing the erosion amount of the slope sheet flow and the erosion amount of the narrow groove through a test is provided by overcoming the defects that the current measuring method has larger disturbance to the water flow section and inaccurate measuring result when sampling; and the second is a method for quantitatively distinguishing the erosion amount of the slope laminar flow from the erosion amount of the fine groove by the device.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a device of ration differentiation domatic laminar flow erosion amount and slot erosion amount, includes test platform, its characterized in that: the test platform is provided with more than one soil groove for filling soil, and the soil grooves are mutually parallel and are arranged along the height direction of the test platform; the soil tank is composed of two parallel lateral plates with a certain interval, the interval between the two lateral plates forms the width of the soil tank, the length of the lateral plates forms the length of the soil tank, and the top ends of the two lateral plates are provided with upper baffles; the lower end of each soil tank is provided with a current collecting barrel; the device is also provided with a water spraying head which is connected with a water spraying pipeline with a control device, water with a certain pressure is input into the water spraying pipeline, and is sprayed out through the water spraying head and is sprayed into the soil tank; in the test, each soil tank is filled with test soil with the same height.
In this way, water is sprayed into the soil slopes of the soil grooves, so that the erosion of the soil slopes in the soil grooves by rain is simulated, and the critical slope length of the transition from the erosion of the slope sheet flow to the erosion of the fine grooves can be effectively positioned; the construction raw materials are convenient to obtain, the manufacturing process is simple, and the use and measurement method is convenient; disturbance to the water flow section in the sampling process is eliminated, and accuracy in the soil erosion amount measuring process is improved.
Further: a drainage channel is arranged on the test platform. Thus, the water which is not sprayed into the soil tank can flow out through the drainage channel, and the water is also convenient to collect.
Further: the lateral plates and the upper baffle plates are steel plates, and soil grooves are formed by welding the steel plates. Therefore, the soil tank is welded by the steel plate, so that the manufacturing is convenient, the cost is reduced, and the like.
Further: the effective rainfall area formed by a plurality of water spray heads is larger than the test area formed by a plurality of soil grooves, and the uniformity meets the requirements. Therefore, the water quantity sprayed into each soil tank can be controlled, and the comparison of transverse data among a plurality of soil tanks is facilitated.
Further: the soil grooves are four groups which are parallel, and the lengths from left to right are respectively: 8m, 1m, 2m, 4m, the width and height of which are identical. By the structure, a plurality of groups of data with typical significance can be obtained, a full-ditch-length sheet flow erosion quantity distribution model can be established through the data, the purpose of quantitatively distinguishing the slope sheet flow erosion quantity and the fine ditch erosion quantity is achieved, and the result can provide parameters for a soil erosion prediction model and provide theoretical support for soil erosion prevention measures.
Further: the soil grooves of each group are three, and the length, the width and the height of the three are the same. Therefore, the measurement data can be mutually verified and repeatedly reproduced, the experimental precision is improved, and the optimal value can be obtained through the comparative analysis of three groups of data to be used as effective data, or the average value is taken as the effective data to be used for subsequent processing.
The method for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the fine groove is characterized by comprising the following steps:
1) The device for quantitatively distinguishing the erosion amount of the slope laminar flow and the erosion amount of the fine groove is manufactured;
2) According to the technological requirements, the inclination angle of the device is adjusted, and each soil tank is filled with the soil to be tested;
3) Adjusting the position of the water spraying head, opening a control device of a water spraying pipeline, spraying water to the soil tank, and starting artificial rainfall simulation;
4) Collecting water and sand samples in the current collector corresponding to each soil tank;
5) Stopping spraying water after the time required by the process is reached;
6) Drying water collected by each current collector, measuring the sediment quantity collected by each current collector, and respectively obtaining the total erosion quantity of each soil tank with the slope length of 1, 2, 4 and 8 m;
7) Measuring critical slope length of the transition from laminar flow erosion to fine ditch erosion in an earth trough with the length of 8 m;
8) Determining slope erosion stages of soil grooves with slope lengths of 1, 2, 4 and 8m to obtain actual measured laminar flow erosion quantity;
9) Establishing a model according to actual measurement data of the slope length-sheet flow erosion amount, and determining the sheet flow erosion amount distribution of the full groove length;
10 Adding the actually measured sheet flow erosion amount and the sheet flow erosion amount solved by the model to obtain the sheet flow erosion amount under the working condition.
Therefore, multiple groups of data can be obtained, the measured data can be mutually verified and repeatedly reproduced, the experimental precision is improved, and the optimal value can be obtained through the comparative analysis of the three groups of data to be used as effective data, or an average value is taken as the effective data to be subjected to subsequent processing; and establishing a model through actual measurement data of the slope length and the sheet flow erosion amount, and determining the sheet flow erosion amount distribution of the full groove length.
Further: and adding the sheet flow erosion amount collected in the current collector and the sheet flow erosion amount obtained by solving the model to obtain the sheet flow erosion amount under the working condition. Subtracting the sheet flow erosion amount under the working condition from the total erosion amount collected in the collector barrel of the 8m soil tank to obtain the fine ditch erosion amount.
The device and the method for quantitatively distinguishing the erosion amount of the slope laminar flow from the erosion amount of the fine groove have the following beneficial effects:
1. the device for distinguishing the erosion amount of the slope laminar flow and the erosion amount of the fine groove can effectively position the critical slope length of the transition from the erosion of the slope laminar flow to the erosion of the fine groove, and has the advantages of convenient acquisition of construction raw materials, simple manufacturing process and convenient use and measurement method;
2. according to the invention, by modifying the test device and improving the sampling method, disturbance to the water flow section in the sampling process is eliminated, and the accuracy in the soil erosion amount measuring process is improved;
3. by establishing a full-ditch-length laminar flow erosion quantity distribution model, the purpose of quantitatively distinguishing the slope laminar flow erosion quantity and the fine ditch erosion quantity is achieved, and the result can provide parameters for a soil erosion prediction model and theoretical support for soil erosion prevention measures.
Drawings
FIG. 1 is a schematic diagram of a slope sheet erosion and sipe erosion test apparatus;
FIG. 2 is a schematic diagram of a second embodiment of a slope sheet erosion and sipe erosion test device;
FIG. 3 is an exploded view of a method for quantitatively distinguishing the erosion amount of a sloping surface sheet flow from the erosion amount of a fine groove;
FIG. 4 is a flow chart of a method for quantitatively distinguishing the erosion amount of the slope sheet flow from the erosion amount of the fine groove.
In the figure, 1-test platform, 2-soil tank, 3-lateral plate, 4-upper baffle, 5-collector nozzle, 6-collector barrel, 7-sprinkler head, 8-water spraying pipeline and 9-drainage channel.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. It is noted that, as used in this disclosure, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, 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. The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention provides a device for quantitatively distinguishing slope sheet erosion amount and fine ditch erosion amount, which comprises a test platform 1, wherein more than one soil groove 2 is arranged on the test platform 1 and used for filling soil, and the soil grooves 2 are mutually parallel and are arranged along the height direction of the test platform 1; the soil tank 2 is composed of two mutually parallel lateral plates 3 with a certain interval, the interval between the two lateral plates 3 forms the width of the soil tank 2, the length of the lateral plates 3 forms the length of the soil tank 2, and the top ends of the two lateral plates 3 are provided with upper baffle plates 4 for blocking water, sediment and the like outside the soil tank 2 from entering the soil tank 2.
The soil grooves 2 are four groups which are parallel, the lengths from left to right are respectively 8m, 1m, 2m and 4m, the width and the height are the same, and the width is 0.2 m and the height is 0.3 m (depth) of a specific structure in the figure; the lateral plates 3 and the upper baffle plates 4 can be made of steel plates, and four groups of soil grooves 2 with the same width and height are formed by welding the steel plates. At the lower end of each soil tank 2, a collecting vessel 6 is provided for holding water and sediment flowing down from the soil tank 2 and for weighing and metering. The device is also provided with a water spraying head 7, the water spraying head 7 is connected with a water spraying pipeline 8 with a control device, water with certain pressure is input through the water spraying pipeline 8, the water is sprayed out through the water spraying head 7 and is sprayed into the soil tank 2, and the rainfall is simulated to fall into the soil tank 2 to erode the soil slope. The effective rainfall area formed by the water spray heads 7 is larger than the test area formed by the soil grooves 2, and the rainfall uniformity of each soil groove can be ensured to meet the requirement in the rainfall effective area formed by the water spray heads 7. In order to collect all water and sand flowing downwards in the soil tanks 2 into the current collector 6, the lower end of each soil tank 2 is extended and protrudes out of the test platform 1 to form current collector nozzles 5, and each current collector nozzle 5 corresponds to one current collector 6.
In order to prevent rainfall which does not enter the soil tank 2 from affecting the erosion process of the test, a drainage channel 9 is arranged on the test platform 1, the drainage channel 9 is arranged between two groups of soil tanks 2 with the height of 8 meters and 1 meter in the figure, and water on the test platform 1 is led out and flows into the corresponding collector barrels 6.
For verification experiments, two or three soil grooves 2 are arranged corresponding to each group of soil grooves 2 with different heights, namely, three soil grooves 2 with the heights of 8 meters, 1 meter, 2 meters and 4 meters in the figure are arranged in parallel, and the lengths, the widths and the heights (depths) of the three soil grooves are the same.
During the test, each soil tank 2 is filled with tested soil with the same volume weight, a control device of a water spraying pipeline 8 is opened, water is sprayed out from a water spraying head 7 and is sprayed into the soil tank 2, and the process of erosion of the soil slope caused by rainfall falling into the soil tank 2 is simulated; and collecting the water sand full samples in the current collector 6 corresponding to each soil tank 2, and carrying out next analysis such as drying and weighing.
In this example, test soil grooves 2 were constructed on a test platform having a gauge of 12 m, 3 m wide and 0.5 m high, and soil grooves 8m, 1m, 2m and 4m long were distributed in this order from left to right according to weights, each soil groove having a gauge of 0.2 m wide and 0.3 m high, and each gauge (length width: 8m ×0.2 m ×0.3 m, 1m×0.2 m ×0.3 m, 2m×0.2 m ×0.3 m, 3 m×0.2 m ×0.3 m) had 3 soil grooves for repeated tests. The rainfall runoff producing and draining channel 9 is arranged between the soil grooves with the lengths of 8m and 1m, the structural design can meet the counterweight requirement of the steel plate, the rainfall runoff producing channel is effectively provided, and the influence of redundant rainfall on test results is avoided. The test soil tank structure can effectively position the critical slope length of slope sheet flow erosion to fine ditch erosion transition, meanwhile, a collecting barrel is used for collecting water and sand full samples at the outlet of each soil tank, the total erosion amount of the full slope length in a given time period is measured, the operation is simple, the disturbance of the along-path sampling to the water flow section is avoided, and the result is more accurate and reliable. In addition, the device can adjust the inclination angle of the test platform and meet the test requirements of various inclination angles (the gradient of a soil slope).
The method for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the fine groove by adopting the device comprises the following steps:
1. the device for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the fine groove is manufactured;
2. according to the technological requirements, the inclination angle of the device is adjusted, and each soil tank 2 is filled with the soil to be tested;
3. the position of the water spraying head 7 is adjusted, a control device of the water spraying pipeline 8 is opened, water is sprayed to the soil tank 2, artificial rainfall simulation is started, and the test device is placed in an artificial rainfall environment;
4. collecting water sand samples in the current collector 6 corresponding to each soil tank 2;
5. stopping spraying water after the time required by the process is reached, namely stopping artificial rainfall simulation;
6. drying water collected by each current collector 6, measuring the sediment quantity collected by each current collector, and respectively obtaining the total erosion quantity of each soil tank with the length (slope length is 1, 2, 4 and 8 m);
7. measuring critical slope length of the transition from laminar flow erosion to fine ditch erosion in an earth trough with the length of 8 m;
8. determining slope erosion stages of soil grooves with slope lengths of 1, 2, 4 and 8m to obtain actual measured laminar flow erosion quantity;
9. establishing a model according to actual measurement data of the slope length-sheet flow erosion amount, and determining the sheet flow erosion distribution of the full groove length;
10. and adding the actually measured sheet flow erosion amount and the sheet flow erosion amount solved by the model to obtain the sheet flow erosion amount under the working condition.
And according to the actually measured total erosion amount and the calculated laminar flow erosion amount, subtracting the laminar flow erosion amount from the total erosion amount, and calculating to obtain the fine trench erosion amount. Subtracting the sheet flow erosion amount under the working condition from the total erosion amount collected in the collector barrel of the 8m soil tank to obtain the fine ditch erosion amount.
Referring to fig. 2 and 3, specific experimental phenomena embodying the present invention are shown, one of which is the experiment.
Referring to fig. 2 and 3, if the critical slope length of the slope sheet erosion transition to the fine ditch erosion is 2.5 m, it is indicated that the total sample of water and sand collected in the collecting barrel at the outlet of the 2m soil tank is the sheet erosion amount, and the remaining 0.5 m, i.e. the sheet erosion amount in the range of 2-2.5 m, can build a model of the sheet erosion amount along with the total slope length according to the rules of the slope length and the sheet erosion amount, so as to calculate the sheet erosion amount; adding the measured laminar flow erosion amount of the 2m soil tank to the solved laminar flow erosion amount within the range of 2-2.5 m to obtain laminar flow erosion amount of the 2.5 m soil tank under the working condition; and finally, subtracting the sheet flow erosion amount under the working condition from the total erosion amount of the current collector at the outlet of the 8m soil tank to obtain the fine ditch erosion amount, thereby achieving the purpose of quantitatively distinguishing the slope sheet flow erosion amount and the fine ditch erosion amount.
Referring to fig. 4, a specific method for solving the sheet flow erosion amount model is as follows: the full water and sand sample collected in the collecting barrel at the outlet of the soil tank with the length of 1m corresponds to one laminar flow erosion amount, the full water and sand sample collected in the collecting barrel at the outlet of the soil tank with the length of 2m corresponds to one laminar flow erosion amount, and the actual measurement data of the two 'slope lengths-laminar flow erosion amounts' are used for establishing the change rule of the laminar flow erosion amount along with the full slope lengths, so that the laminar flow erosion amount at the full slope length is obtained through fitting calculation.
Referring to fig. 4, the sheet flow erosion amount calculation method: and obtaining a full-slope length rule of the laminar flow erosion amount by fitting, calculating the laminar flow erosion amount in the range of 2-2.5 and m, adding the laminar flow erosion amount to the laminar flow erosion amount actually measured in the current collecting barrel at the outlet of the 2m soil tank, and calculating the laminar flow erosion amount under the working condition.
The method for calculating the erosion amount of the fine groove comprises the following steps: and subtracting the sheet flow erosion amount under the working condition from the total erosion amount actually measured in the collector barrel at the outlet of the 8m soil tank to calculate the fine ditch erosion amount.
The device and the method for quantitatively distinguishing the erosion amount of the slope sheet flow from the erosion amount of the fine groove in the embodiment have the advantages of convenient construction raw material acquisition, simpler manufacturing process, convenient operation method, no disturbance to the section during sampling and accurate result; the method can effectively position the critical slope length of the slope sheet flow erosion transition to the fine ditch erosion, and establishes the sheet flow erosion quantity distribution model with full ditch length, thereby quantitatively distinguishing the slope sheet flow erosion quantity and the fine ditch erosion quantity, providing parameters for a soil erosion prediction model and providing theoretical support for water and soil loss preventive measures.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and although the applicant has described the present invention in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents of the technical solution of the present invention can be made without departing from the spirit and scope of the technical solution, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (7)
1. The method for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the fine groove is characterized by comprising the following steps:
1) A device for quantitatively distinguishing the erosion amount of the slope laminar flow and the erosion amount of the fine groove is manufactured;
the device comprises a test platform (1), and is characterized in that: more than one soil groove (2) is arranged on the test platform (1) and used for filling soil, the soil grooves (2) are mutually parallel and are arranged along the height direction of the test platform (1); the soil tank (2) is composed of two parallel lateral plates (3) with a certain interval, the interval between the two lateral plates (3) forms the width of the soil tank (2), the length of the lateral plates (3) forms the length of the soil tank (2), and the top ends of the two lateral plates (3) are provided with upper baffles (4); the lower end of each soil tank (2) is provided with a current collecting barrel (6); the device is also provided with a water spraying head (7), the water spraying head (7) is connected with a water spraying pipeline (8) with a control device, water with certain pressure is input through the water spraying pipeline (8), and is sprayed into the soil tank (2) through the water spraying head (7);
2) According to the technological requirements, the inclination angle of the device is adjusted, and each soil tank is filled with the soil to be tested;
3) Adjusting the position of the water spraying head, opening a control device of a water spraying pipeline, spraying water to the soil tank, and starting artificial rainfall simulation;
4) Collecting water and sand samples in the current collector corresponding to each soil tank;
5) Stopping spraying water after the time required by the process is reached;
6) Drying water collected by each current collector, measuring the sediment quantity collected by each current collector, and respectively obtaining the total erosion quantity of each soil tank with the slope length of 1, 2, 4 and 8 m;
7) Measuring critical slope length of the transition from laminar flow erosion to fine ditch erosion in an earth trough with the length of 8 m;
8) Determining slope erosion stages of soil grooves with slope lengths of 1, 2, 4 and 8m to obtain actual measured laminar flow erosion quantity;
9) Establishing a model according to actual measurement data of the slope length-sheet flow erosion amount, and determining the sheet flow erosion amount distribution of the full groove length;
10 Adding the actually measured sheet flow erosion amount and the sheet flow erosion amount solved by the model to obtain the sheet flow erosion amount under the working condition;
11 Subtracting the sheet flow erosion amount under the working condition from the total erosion amount collected in the collector barrel of the 8m soil tank to obtain the fine ditch erosion amount.
2. The method for quantitatively distinguishing the erosion amount of the sloping surface sheet flow from the erosion amount of the fine groove according to claim 1, which is characterized in that: a drainage channel (9) is arranged on the test platform (1).
3. The method for quantitatively distinguishing the erosion amount of the sloping surface laminar flow from the erosion amount of the fine groove according to claim 1,
the method is characterized in that: the lateral plates (3) and the upper baffle plates (4) are steel plates, and the soil grooves (2) are formed by welding the steel plates.
4. The method for quantitatively distinguishing the erosion amount of the sloping surface laminar flow from the erosion amount of the fine groove according to claim 1,
the method is characterized in that: the lower end of each soil groove (2) is prolonged to form a current collecting nozzle (5), and each current collecting nozzle (5) corresponds to one current collecting barrel (6).
5. The method for quantitatively distinguishing the erosion amount of the sloping surface laminar flow from the erosion amount of the fine groove according to claim 1,
the method is characterized in that: the effective rainfall area formed by a plurality of water spray heads (7) is larger than the test area formed by the soil grooves (2).
6. The method for quantitatively distinguishing the erosion amount of the slope sheet flow from the erosion amount of the fine groove according to any one of claims 1 to 5, wherein: the soil grooves (2) are four groups which are parallel, and the lengths from left to right are respectively: 8m, 1m, 2m, 4m, the width and height of which are identical.
7. The method for quantitatively distinguishing the erosion amount of the sloping surface laminar flow from the erosion amount of the fine groove according to claim 6,
the method is characterized in that: the soil grooves (2) of each group are three, and the lengths, the widths and the heights of the three are the same.
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| CN202111349599.6A CN114019144B (en) | 2021-11-15 | 2021-11-15 | Device and method for quantitatively distinguishing erosion amount of slope laminar flow and erosion amount of fine groove |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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