CN114019144A - Device and method for quantitatively distinguishing erosion amount of slope sheet flow and erosion amount of fine ditches - Google Patents
Device and method for quantitatively distinguishing erosion amount of slope sheet flow and erosion amount of fine ditches Download PDFInfo
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- 230000003628 erosive effect Effects 0.000 title claims abstract description 195
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- 239000002689 soil Substances 0.000 claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
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- 230000007704 transition Effects 0.000 claims description 3
- 238000004162 soil erosion Methods 0.000 abstract description 13
- 238000005070 sampling Methods 0.000 abstract description 9
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- 238000006243 chemical reaction Methods 0.000 abstract description 4
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Abstract
The invention provides a device and a method for quantitatively distinguishing erosion amount of a slope sheet flow and erosion amount of a sulcus, wherein more than one soil groove is arranged on a test platform for filling soil, the soil grooves are parallel to each other and are formed by two lateral plates with a certain distance, the distance 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 baffle plates; the lower end of each soil tank is provided with a collecting barrel; the sprinkler head is connected with a sprinkler pipe with a control device, and water with certain pressure is input into the sprinkler pipe and is sprayed into the soil tank through the sprinkler head. By spraying water to the soil slope of the soil tank, the invention simulates the scouring of rainfall on the soil slope in the soil tank, and can effectively position the critical slope length of the conversion from the sheet flow erosion of the slope to the erosion of the rill; the manufacturing process is simple, and the use and measurement method are convenient; the disturbance to the water flow section in the sampling process is eliminated, and the 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 and fine furrow erosion amount.
Background
The slope is the main policy source land for soil loss, and soil erosion caused by the slope gradually develops and evolves along with time and space. As the length of the slope surface increases, rainfall laminar flows are converged, and when the length of the slope surface reaches a certain slope length, the laminar flows gradually form concentrated water flows. Under the action of concentrated water flow, soil erosion is increased rapidly, fine channels are formed on the eroded slope surface gradually, and the erosion process gradually evolves from lamellar erosion to fine channel erosion. The erosion of the fine ditches is a key erosion process of the development from the sheet erosion to the ditch erosion, the generation of the fine ditches marks the change of the main erosion mode of the slope, the erosion power of the slope is essentially changed along with the generation and the development of the fine ditches, and the erosion force and the carrying force of the slope are both obviously greater than the erosion and the carrying capacity of the sheet water flow of the slope. The laminar flow erosion and the sulcus erosion of the soil slope are two erosion process chains which are mutually connected in space, and the laminar flow erosion and the sulcus erosion are researched as a whole, so that the law of the rainfall erosion evolution process of the slope can be better met. The slope erosion process is continuously transformed and evolved along with the duration of rainfall and the spatial position, and the quantitative distinction of the laminar flow erosion process and the fine groove erosion process becomes a difficult point of research.
In the existing research on the spatial change characteristics of slope erosion along with the slope length, the soil erosion amount is mostly measured by adopting a method of sampling along the way, and the method has the defects that disturbance of a water flow section along the way is caused during sampling, more manpower is needed, and human errors are easily generated, so that the measurement result is inaccurate.
In addition, it is also common to measure the soil erosion amount by using a method of washing along the way in sections, and the method has the disadvantage that repeated washing of the part of the soil tank outlet is neglected, and the method cannot be verified in the accuracy of the measurement result.
At present, in the technology for quantitatively researching rainfall erosion and rill erosion space change rules, the erosion amount of different terrain parts can be measured by adopting an REE element tracing method, so that the runoff erosion amount of a soil slope surface is quantitatively researched.
However, in some existing soil erosion amount measuring methods, laminar flow erosion or rill erosion is researched as two independent erosion processes, the difference between laminar flow erosion and rill erosion is ignored, the difference exists with the actual slope rainfall erosion process, and the method and the device for distinguishing the slope laminar flow erosion and the rill erosion evolution processes are not proposed or improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a device and a method for quantitatively distinguishing the erosion amount of the slope laminar flow from the erosion amount of the fine ditches; firstly, the device capable of distinguishing the slope sheet flow erosion amount and the fine groove erosion amount through tests is provided by overcoming the defects that the disturbance on the water flow section is large and the measurement result is inaccurate in the existing measurement method during sampling; the second method is to quantitatively distinguish the erosion amount of the slope sheet flow and the erosion amount of the sulcus by the device.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a device of slope surface laminar flow erosion amount and rill erosion amount is distinguished to ration, includes test platform, its characterized in that: more than one soil groove is arranged on the test platform and used for filling soil, and the soil grooves are parallel to each other and arranged along the height direction of the test platform; the soil tank is composed of two parallel lateral plates with a certain distance, the distance 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 baffle plates; the lower end of each soil tank is provided with a collecting barrel; the water spraying device is also provided with a water spraying head, the water spraying head is connected with a water spraying pipeline with a control device, and water with certain pressure is input into the water spraying pipeline and sprayed into the soil tank through the water spraying head; during the test, the soil to be tested with the same height is filled in each soil groove.
Thus, water is sprayed into the soil slope of the soil grooves to simulate the erosion of rain on the soil slope in the soil grooves, and the critical slope length of the change from the sheet flow erosion to the fine trench erosion of the slope can be effectively positioned; construction raw materials are convenient to obtain, the manufacturing process is simple, and the using and measuring method is convenient; the disturbance to the water flow section in the sampling process is eliminated, and the accuracy in the soil erosion amount measuring process is improved.
Further: a drainage channel is arranged on the test platform. Therefore, water which is not sprayed into the soil tank can flow out through the drainage channel, and is convenient to collect.
Further: the lateral plates and the upper baffle are steel plates, and the soil tank is formed by welding the steel plates. Therefore, the soil tank is formed by welding the steel plates, the manufacturing is convenient, the cost is reduced, and the like.
Further: the effective rainfall area formed by the plurality of water spray heads is larger than the test area formed by the plurality of soil tanks, and the uniformity meets the requirement. The water quantity sprayed into each soil groove can be controlled, and comparison of transverse data among a plurality of soil grooves is facilitated.
Further: the soil box be four groups of parallels, from left to right the length respectively is: 8m, 1m, 2m, 4m, the width and height of which are the same. By means of the structure, a plurality of groups of data with typical significance can be obtained, a sheet flow erosion amount distribution model of the whole ditch length can be established through the data, the purpose of quantitatively distinguishing the sheet flow erosion amount and the fine ditch erosion amount of the slope surface is achieved, parameters can be provided for a soil erosion forecasting model, and theoretical support is provided for water and soil loss prevention measures.
Further: the soil grooves of each group are three, and the length, the width and the height of the three soil grooves are the same. Therefore, the measured data can be mutually verified and repeatedly reproduced, the experimental precision is improved, and the optimal value can be obtained through comparative analysis of the three groups of data to be used as effective data, or the average value is taken to be used as the effective data to carry out subsequent processing.
The method for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the sulcus is characterized by comprising the following steps of:
1) manufacturing the device for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the fine ditches;
2) adjusting the inclination angle of the device according to the process requirements, and filling the soil to be tested in each soil groove;
3) adjusting the position of a sprinkler head, opening a control device of a water spraying pipeline, spraying water to the soil tank, and starting artificial rainfall simulation;
4) collecting a water and sand sample in the collecting barrel corresponding to each soil tank;
5) stopping spraying water after the time of the process requirement is reached;
6) drying the water collected by each collecting barrel, measuring the amount of silt collected by each collecting barrel, and respectively obtaining the total erosion amount of each soil tank with the slope length of 1, 2, 4 and 8 m;
7) measuring the critical slope length of the transition from laminar flow erosion to rill erosion in an 8m long soil tank;
8) determining the slope surface erosion stage of the soil tank with the slope length of 1, 2, 4 and 8m to obtain the actually measured laminar flow erosion amount;
9) establishing a model according to the measured data of slope length-laminar flow erosion amount, and determining the laminar flow erosion amount distribution of the whole ditch length;
10) and adding the actually measured laminar flow erosion amount and the laminar flow erosion amount solved by the model to obtain the laminar flow erosion amount under the working condition.
Therefore, a plurality of 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 comparative analysis of the three groups of data to be used as effective data, or the average value is taken to be used as the effective data for subsequent processing; and establishing a model through the measured data of slope length-laminar flow erosion amount to determine the laminar flow erosion amount distribution of the whole ditch length.
Further: and adding the laminar flow erosion amount collected in the collecting barrel and the laminar flow erosion amount obtained by model solution to obtain the laminar flow erosion amount under the working condition. And subtracting the sheet flow erosion amount under the working condition from the total erosion amount collected in the collecting barrel of the soil tank with the diameter of 8m to obtain the rill erosion amount.
The device and the method for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the fine ditches have the following beneficial effects:
1. the device for distinguishing the erosion amount of the sheet flow of the slope surface from the erosion amount of the fine groove can effectively position the critical slope length of the conversion from the sheet flow erosion of the slope surface to the erosion of the fine groove, the construction raw materials of the device are convenient to obtain, the manufacturing process is simple, and the using and measuring method is convenient;
2. according to the invention, through the improvement of the test device and the improvement of the sampling method, the 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. the purpose of quantitatively distinguishing the sheet flow erosion amount and the fine furrow erosion amount of the slope surface is achieved by establishing a sheet flow erosion amount distribution model of the whole furrow length, and the result can provide parameters for a soil erosion forecasting model and theoretical support for water and soil loss prevention measures.
Drawings
FIG. 1 is a schematic view of a slope sheet flow erosion and rill erosion test apparatus;
FIG. 2 is a schematic view of a second embodiment of a slope sheet flow erosion and rill erosion test apparatus;
FIG. 3 is an exploded view of a method for quantitatively distinguishing between the amount of erosion of the sheet flow and the amount of erosion of the furrows on the slope;
FIG. 4 is a schematic flow chart of a method for quantitatively distinguishing erosion amount of slope sheet flow from erosion amount of sulcus.
In the figure, 1 is a test platform, 2 is a soil tank, 3 is a lateral plate, 4 is an upper baffle, 5 is a collecting nozzle, 6 is a collecting barrel, 7 is a water spray head, 8 is a water spray pipeline, and 9 is a drainage channel.
Detailed Description
The present invention will be described in detail with reference to specific embodiments. It is noted that, as used in the disclosure of the invention, the singular forms "a," "an," 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 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 erosion amount of a slope sheet flow and erosion amount of a sulcus, 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 parallel to each other and arranged along the height direction of the test platform 1; soil box 2 comprises two side direction boards 3 that are parallel to each other, have the certain interval, and the interval between two side direction boards 3 forms soil box 2's width, and side direction board 3's length forms soil box 2's length, is provided with upper portion baffle 4 on two side direction board 3's top, blocks that water, silt etc. outside soil box 2 get into soil box 2.
The soil grooves 2 are four groups in parallel, the lengths from left to right are respectively 8m, 1m, 2m and 4m, the width and the height of the soil grooves are the same, and the width and the height of the soil grooves are 0.2 m and 0.3 m (depth); the lateral plates 3 and the upper baffle 4 can be made of steel plates, and four groups of soil tanks 2 with the same width and height are formed by welding the steel plates. At the lower end of each soil box 2, a collecting tank 6 is provided for containing water and silt flowing down from the soil box 2 and for weighing and metering. The soil erosion simulation device is characterized in that a water spraying head 7 is further arranged, 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 of the soil spraying head 7 and sprayed into the soil tank 2, and simulated rainfall falls into the soil tank 2 to erode the soil slope. The effective rainfall area formed by the plurality of sprinkler heads 7 is larger than the test area formed by the plurality of soil tanks 2, and the rainfall uniformity of each soil tank can meet the requirement in the rainfall effective area formed by the plurality of sprinkler heads 7. In order to collect all water and sand flowing downwards in the soil tanks 2 into the collecting barrels 6, the lower end of each soil tank 2 is extended and protrudes out of the test platform 1 to form a flow collecting nozzle 5, and each flow collecting nozzle 5 corresponds to one collecting barrel 6.
In order to prevent rainfall which does not enter the soil tanks 2 from influencing the erosion process of the test, a drainage channel 9 is arranged on the test platform 1, the drainage channel 9 in the figure is arranged between two groups of soil tanks 2 with the heights of 8 meters and 1 meter, and water on the test platform 1 is guided out and flows into the corresponding collecting barrels 6.
For the purpose of verification experiment, two or three soil tanks 2 are arranged corresponding to each group of soil tanks 2 with different heights, namely, the soil tanks 2 with the heights of 8 meters, 1 meter, 2 meters and 4 meters in the figure are arranged in parallel, and the three soil tanks are the same in length, width and height (depth).
During the test, filling soil to be tested with the same volume weight into each soil groove 2, opening a control device of a water spraying pipeline 8, spraying water into the soil grooves 2 from a water spraying head 7, and simulating the process that rainfall falls into the soil grooves 2 to erode the soil slope; and collecting a full sample of water and sand in the collecting barrel 6 corresponding to each soil tank 2, and carrying out the next drying, weighing and other analysis.
In this embodiment, the soil box 2 for the test is constructed on a test platform with a specification of 12 m long, 3 m wide and 0.5 m high, and 8m, 1m, 2m and 4m long soil boxes are distributed from left to right in sequence according to the balance weight, wherein each soil box has a specification of 0.2 m wide and 0.3 m high, and 3 soil boxes for the repeat test are available for each specification (length, width and height: 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). A rainfall runoff-generating drainage channel 9 is arranged between the soil tanks with the lengths of 8m and 1m, the structural design can meet the requirement of the balance weight of the steel plate, the rainfall runoff-generating channel is effectively provided, and the influence of redundant rainfall on the test result is avoided. The test soil tank structure can effectively position the critical slope length of the slope surface laminar flow erosion to the fine ditch erosion, meanwhile, a water and sand full sample is collected by the collecting barrel 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 on-the-way sampling on the water flow section is avoided, and the result is more accurate and reliable. In addition, the device of the invention can adjust the inclination angle of the test platform and meet the test requirements of various inclination angles (the gradient of the soil slope).
The method for quantitatively distinguishing the erosion amount of the slope laminar flow and the erosion amount of the sulcus by adopting the device comprises the following steps:
1. manufacturing the device for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the fine ditches;
2. adjusting the inclination angle of the device according to the process requirements, and filling the soil to be tested into each soil groove 2;
3. adjusting the position of a sprinkler head 7, opening a control device of a water spraying pipeline 8, spraying water to the soil tank 2, starting artificial rainfall simulation, and placing the test device in an artificial rainfall environment;
4. collecting a water and sand sample in the collecting barrel 6 corresponding to each soil tank 2;
5. stopping spraying water after the time of the process requirement is reached, namely stopping artificial rainfall simulation;
6. drying the water collected by each collecting barrel 6, measuring the amount of silt collected by each collecting barrel, and respectively obtaining the total erosion amount of each soil tank with the length (the slope length is 1, 2, 4 and 8 m);
7. measuring the critical slope length of the transition from laminar flow erosion to rill erosion in an 8m long soil tank;
8. determining the slope surface erosion stage of the soil tank with the slope length of 1, 2, 4 and 8m to obtain the actually measured laminar flow erosion amount;
9. establishing a model according to the measured data of slope length-laminar flow erosion amount, and determining laminar flow erosion distribution of the whole ditch length;
10. and adding the actually measured laminar flow erosion amount and the laminar flow erosion amount solved by the model to obtain the laminar flow erosion amount under the working condition.
And (4) according to the total erosion amount obtained by the actual measurement and the sheet flow erosion amount obtained by solving, subtracting the sheet flow erosion amount from the total erosion amount to calculate to obtain the rill erosion amount. And subtracting the sheet flow erosion amount under the working condition from the total erosion amount collected in the collecting barrel of the soil tank with the diameter of 8m to obtain the rill erosion amount.
Referring to fig. 2 and 3, specific experimental phenomena embodying the present invention are shown, showing one of the experimental phenomena.
Referring to fig. 2 and 3, if the critical slope length of the conversion from slope laminar flow erosion to rill erosion is 2.5 m, it is indicated that all the water and sand samples collected in the collecting barrel at the outlet of the soil tank of 2m are laminar flow erosion amount, and the remaining 0.5 m, namely the laminar flow erosion amount in the range of 2-2.5 m, can establish a model of laminar flow erosion amount along with the full slope length according to the rule of the slope length and the laminar flow erosion amount, so as to calculate the laminar flow erosion amount; adding the actually measured laminar flow erosion amount of the soil tank of 2m with the solved laminar flow erosion amount within the range of 2-2.5 m to obtain the laminar flow erosion amount under the working condition in the soil tank of 2.5 m; and finally, deducting the sheet flow erosion amount under the working condition by using the total erosion amount of the collecting barrel at the outlet of the soil tank with the depth of 8m to obtain the rill erosion amount, thereby achieving the purpose of quantitatively distinguishing the sheet flow erosion amount of the slope surface from the rill erosion amount.
Referring to fig. 4, a specific method for solving the sheet flow erosion amount model is as follows: the water and sand full 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, and similarly, the water and sand full 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 measured data of the two slope length-laminar flow erosion amounts are used for establishing the change rule of the laminar flow erosion amount along with the full slope length, so that the laminar flow erosion amount at the full slope position is obtained through fitting calculation.
Referring to fig. 4, a sheet flow erosion amount calculation method: and (3) obtaining a full slope length rule of the laminar flow erosion amount through fitting, calculating the laminar flow erosion amount within the range of 2-2.5 m, adding the laminar flow erosion amount to the actually measured laminar flow erosion amount in the collecting barrel at the outlet of the soil tank with the depth of 2m, and calculating to obtain the laminar flow erosion amount under the working condition.
The calculation method of the rill erosion amount comprises the following steps: and subtracting the sheet flow erosion amount under the working condition from the actual measured total erosion amount in the collecting barrel at the outlet of the soil tank with the depth of 8m to calculate the erosion amount of the sulcus.
The device and the method for quantitatively distinguishing the erosion amount of the sheet flow of the slope surface from the erosion amount of the fine groove in the embodiment have the advantages that construction raw materials are convenient to obtain, the manufacturing process is simple, the operation method is convenient and fast, disturbance to the section does not exist during sampling, and the result is accurate; the method can effectively position the critical slope length of the conversion from the slope laminar flow erosion to the sulcus erosion, and establish a laminar flow erosion amount distribution model of the whole sulcus length, thereby quantitatively distinguishing the slope laminar flow erosion amount and the sulcus erosion amount, providing parameters for a soil erosion prediction model, and providing theoretical support for water and soil loss prevention measures.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the present invention has been described in detail by referring to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a device of slope surface laminar flow erosion amount and rill erosion amount is distinguished to ration, includes test platform (1), its characterized in that: more than one soil groove (2) is arranged on the test platform (1) and is used for filling soil, and the soil grooves (2) are parallel to each other 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 distance, the distance 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); the lower end of each soil tank (2) is provided with a collecting barrel (6);
the soil-working machine 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 sprayed out through the water spraying head (7) to be sprayed into the soil tank (2).
2. The apparatus of claim 1 for quantitatively distinguishing between slope sheet flow erosion and rill erosion, wherein: a drainage channel (9) is arranged on the test platform (1).
3. The apparatus of claim 1 for quantitatively distinguishing between slope sheet flow erosion and rill erosion,
the method is characterized in that: the lateral plates (3) and the upper baffle (4) are steel plates, and the soil tank (2) is formed by welding the steel plates.
4. The apparatus of claim 1 for quantitatively distinguishing between slope sheet flow erosion and rill erosion,
the method is characterized in that: the lower end of each soil tank (2) is extended to form a flow collecting nozzle (5), and each flow collecting nozzle (5) corresponds to one flow collecting barrel (6).
5. The apparatus of claim 1 for quantitatively distinguishing between slope sheet flow erosion and rill erosion,
the method is characterized in that: the effective rainfall area formed by the plurality of water spray heads (7) is larger than the test area formed by the soil tank (2).
6. The apparatus of any one of claims 1 to 5 for quantitatively distinguishing between the amount of erosion by sheet flow and the amount of erosion by furrows of a slope, wherein: the soil grooves (2) are four groups in parallel, and the lengths from left to right are respectively as follows: 8m, 1m, 2m, 4m, the width and height of which are the same.
7. The apparatus of claim 6 for quantitatively distinguishing between slope sheet flow erosion and rill erosion,
the method is characterized in that: the number of the soil grooves (2) in each group is three, and the length, the width and the height of the three soil grooves are the same.
8. The method for quantitatively distinguishing the erosion amount of the slope sheet flow and the erosion amount of the sulcus is characterized by comprising the following steps of:
1) making a device for quantitatively distinguishing between slope sheet flow erosion and rill erosion according to any one of claims 1 to 7;
2) adjusting the inclination angle of the device according to the process requirements, and filling the soil to be tested in each soil groove;
3) adjusting the position of a sprinkler head, opening a control device of a water spraying pipeline, spraying water to the soil tank, and starting artificial rainfall simulation;
4) collecting a water and sand sample in the collecting barrel corresponding to each soil tank;
5) stopping spraying water after the time of the process requirement is reached;
6) drying the water collected by each collecting barrel, measuring the amount of silt collected by each collecting barrel, and respectively obtaining the total erosion amount of each soil tank with the slope length of 1, 2, 4 and 8 m;
7) measuring the critical slope length of the transition from laminar flow erosion to rill erosion in an 8m long soil tank;
8) determining the slope surface erosion stage of the soil tank with the slope length of 1, 2, 4 and 8m to obtain the actually measured laminar flow erosion amount;
9) establishing a model according to the measured data of slope length-laminar flow erosion amount, and determining the laminar flow erosion amount distribution of the whole ditch length;
10) and adding the actually measured laminar flow erosion amount and the laminar flow erosion amount solved by the model to obtain the laminar flow erosion amount under the working condition.
9. The method of quantitatively distinguishing between slope sheet flow erosion and rill erosion according to claim 7, wherein: and subtracting the sheet flow erosion amount under the working condition from the total erosion amount collected in the collecting barrel of the soil tank with the diameter of 8m to obtain the rill erosion amount.
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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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