CN109115104B - A method for measuring soil layer thickness based on magnetic susceptibility - Google Patents
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- 238000005070 sampling Methods 0.000 claims description 26
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- 238000004364 calculation method Methods 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 23
- 238000004162 soil erosion Methods 0.000 abstract description 17
- 238000012544 monitoring process Methods 0.000 abstract description 16
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B47/00—Soil-working with electric potential applied between tools and soil
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B76/00—Parts, details or accessories of agricultural machines or implements, not provided for in groups A01B51/00 - A01B75/00
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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Abstract
本申请提供了一种基于磁化率测量土壤层厚度的测定方法，涉及水土流失监测技术领域。包括：测定样点土壤表土层的原始磁化率Kb；测定磁性件置于表土层的最大磁化率Km；在样点土壤下方的预设深度埋设磁性件，形成磁层；测定磁层正上方表土层的第一磁化率K1；间隔预设时间后，测定磁层正上方表土层的第二磁化率K2；根据土壤层磁化率与土壤层厚度的转换方程，计算土壤层厚度变化值。本申请提供的基于磁化率测量土壤层厚度的测定方法，对样点土壤层扰动极小或无扰动，可快速、精确的得到测定结果，无需任何特殊的人工维护，样点土壤层代表性好，在土壤资源保护、水土流失监测科学研究与野外监测工作中具有较强的实用性。
The application provides a method for measuring the thickness of a soil layer based on magnetic susceptibility, and relates to the technical field of water and soil loss monitoring. Including: measuring the original magnetic susceptibility K b of the soil topsoil layer of the sample point; measuring the maximum magnetic susceptibility K m of the magnetic element placed in the topsoil layer; burying the magnetic element at a preset depth below the sample point soil to form a magnetic layer; The first magnetic susceptibility K 1 of the topsoil layer above; after a preset time interval, the second magnetic susceptibility K 2 of the topsoil layer just above the magnetic layer is measured; according to the conversion equation between the magnetic susceptibility of the soil layer and the thickness of the soil layer, the change of the thickness of the soil layer is calculated value. The method for measuring soil layer thickness based on magnetic susceptibility provided in this application has little or no disturbance to the soil layer of the sample point, can quickly and accurately obtain the measurement results, does not require any special manual maintenance, and has good soil layer representation at the sample point It has strong practicability in soil resource protection, soil erosion monitoring scientific research and field monitoring work.
Description
Technical Field
The application relates to the technical field of water and soil loss monitoring, in particular to a determination method for measuring the thickness of a soil layer based on magnetic susceptibility.
Background
Soil erosion is a serious soil degradation process, and restricts the sustainable utilization of agricultural soil resources worldwide. The basic principle of soil erosion measurement is to monitor the dynamic changes in soil layer thickness due to soil erosion at different spatio-temporal scales, either directly or indirectly. The process of soil erosion is quite complex and often cannot be monitored quantitatively. As a method for directly measuring the soil erosion amount, the erosion needle method measures the thickness increase or decrease of the surface soil layer after the surface soil runs off or is piled up by measuring the distance between the tip of the erosion needle and the soil surface. Specifically, an erosion needle, typically a straight long needle made of metal and hard in texture, is inserted perpendicular to the soil surface in the field. As soil erosion occurs, soil at the monitoring point of the erosion needle may be lost or piled up, and accordingly, the thickness of the soil layer may be changed (or decreased or increased). Therefore, before and after the occurrence of the erosion phenomenon, the vertical distance from the erosion needle to the ground surface is measured by the depth gauge. The difference between the vertical distances obtained by the two measurements is the variation of the thickness of the corresponding soil layer.
Fig. 1 shows a specific measuring process of the erosion needle method. The method comprises the following steps: (1) selecting a soil profile of the sample plot; (2) laying an erosion needle; (3) before measurement, a measuring gasket is placed as a measuring reference surface; (4) measuring the vertical distance from the exposed end of the erosion needle to the upper end of the measuring washer by using a depth measuring ruler; (5) and the difference value of the vertical distances measured twice is the variation of the soil layer thickness of the sampling point, and the variation of the soil layer thickness after soil erosion or accumulation of the sampling point is directly reflected.
Although the erosion needle method is used more extensively, because the erosion needle needs to be buried in the soil horizon locally, the flow state to air, water can be produced to the part that exposes to lead to the monitoring spotting position obvious soil runoff deviation to appear, as the erosion needle is longer in the time that the field stands for, this error is big more. In addition, the exposed portion of the erosion needle is susceptible to interference from external environments, such as animal and human activity, other natural activities, and the failure of erosion needle measurements.
Disclosure of Invention
The application provides a method for measuring the thickness of a soil layer based on magnetic susceptibility, which aims to solve the problems that the soil erosion measurement work in the prior art cannot be effectively carried out, the measurement deviation is large and the like.
A determination method for measuring the thickness of a soil layer based on magnetic susceptibility comprises the following steps:
s1 determination of original magnetic susceptibility K of sample point soil topsoil layerb；
S2 determining the maximum magnetic susceptibility K of the magnetic element placed on the topsoil layerm；
S3, burying the magnetic piece at a preset depth below the sampling point soil to form a magnetic layer;
s4 determining a first susceptibility K of said topsoil layer directly above said magnetic layer1；
S5, measuring the second magnetic susceptibility K of the topsoil layer right above the magnetic layer after a preset time interval2；
S6, calculating the variation value of the soil layer thickness according to the conversion equation of the soil layer magnetic susceptibility and the soil layer thickness.
Optionally, in step S6, the conversion equation is:
H＝202.68-93.46eK*/(-0.0067)-58.69eK*/(-0.0503)-54.80eK*/(0.3371)
wherein, K*The calculation formula of (2) is as follows:
wherein H is the distance between the probe and the magnetic layer, and is mm; k*The magnetic susceptibility of the comprehensive substances is dimensionless; kbOriginal magnetic susceptibility, dimensionless; kmThe magnetic susceptibility is maximum and is dimensionless; k is the magnetic susceptibility of the substance measured by the probe and is dimensionless.
Optionally, the magnetic strength range of the magnetic member is 6000-10000, the thickness range of the magnetic member is 0.5-1.5cm, and the embedding depth of the magnetic member is less than or equal to 20 cm.
Optionally, in step S3, embedding the magnetic member includes: and excavating and filling to arrange magnetic parts or arranging magnetic parts on the cross section.
The technical scheme provided by the application comprises the following beneficial technical effects:
compared with the prior art, the application provides a determination method for measuring the thickness of a soil layer based on magnetic susceptibility, which comprises the following steps: determining original magnetic susceptibility K of sample point soil topsoil layerb(ii) a Determination of the maximum susceptibility K of a magnetic element in a surface soil layerm(ii) a Embedding a magnetic piece at a preset depth below the sampling point soil to form a magnetic layer; determining the first magnetic susceptibility K of the top soil layer directly above the magnetic layer1(ii) a After a preset time interval, measuring a second magnetic susceptibility K of the surface soil layer right above the magnetic layer2(ii) a And calculating the thickness change value of the soil layer according to the conversion equation of the magnetic susceptibility of the soil layer and the thickness of the soil layer. In the implementation process, a special artificial magnetic part is arranged, the susceptibility of a surface soil layer right above a magnetic layer is respectively measured by utilizing a susceptibility instrument probe before and after soil erosion occurs, the soil layer thickness parameter between the magnetic layer and the probe is obtained through a conversion equation of the soil layer susceptibility and the soil layer thickness, and the erosion or accumulation amount of the soil layer at the sample point is reflected by measuring the difference of the obtained soil layer thickness values twice. The method for measuring the thickness of the soil layer based on the magnetic susceptibility has the advantages that disturbance to the soil layer at the sampling point is little or no, the measurement result can be quickly and accurately obtained by adopting the magnetic susceptibility instrument, the magnetic part is buried in the soil layer, the interference to the soil surface soil layer is avoided, and any special manual maintenance is not needed in the subsequent measurement period. In addition, the device required by measurement is low in cost, durable and large in measurement range of the probe, so that the sample point soil layer is more representative, and the device has stronger practicability in soil resource protection, water and soil loss monitoring scientific research and field monitoring work.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic diagram illustrating a principle of measuring a thickness of a soil layer by an erosion needle method according to an embodiment of the present application.
Fig. 2 is a flowchart illustrating a method for measuring a thickness of a soil layer based on magnetic susceptibility according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of a magnetic susceptibility measuring layer of a susceptibility meter according to an embodiment of the present application.
Detailed Description
Referring to fig. 2, the flow chart of a method for measuring the thickness of a soil layer based on magnetic susceptibility according to an embodiment of the present application is shown.
A determination method for measuring the thickness of a soil layer based on magnetic susceptibility, also called a magnetic layer detection method for short, is a rapid measurement method for the thickness of the soil layer which integrates three aspects of a magnetic susceptibility measurement technology, common substance magnetic difference and soil erosion rule in geophysical research, and specifically comprises the following steps:
step S1: determining original magnetic susceptibility K of sample point soil topsoil layerb。
Before formal measurement, the original magnetic susceptibility K of the soil surface soil layer of a sampling point is firstly measured by a susceptibility instrumentbIs measured, the original magnetic susceptibility KbAlso called background topsoil magnetic susceptibility (K-background, abbreviated as K)b)。
Step S2: determination of the maximum susceptibility K of a magnetic element in a surface soil layerm。
Placing a magnetic part with a certain shape structure on the upper surface of the soil layer, and measuring the magnetic part by using a susceptibility instrument, wherein the distance between the magnetic part and the probe is zero, so that the maximum susceptibility K can be obtainedm(K-maximum, K for short)m)。
Step S3: and embedding a magnetic piece at a preset depth below the sampling point soil to form a magnetic layer.
The magnetic part is buried under soil of a sampling point to form a magnetic layer, the magnetic layer is used as a reference surface, the magnetic susceptibility of the upper surface soil layer is in one-to-one correspondence with the soil section thickness, and when the soil section thickness is smaller, the distance from the probe to the magnetic layer is smaller, and the magnetic susceptibility of the surface soil layer is larger. Therefore, the thickness of the soil profile can be calculated by the numerical value of the magnetic susceptibility.
Step S4: determining the first magnetic susceptibility K of the top soil layer directly above the magnetic layer1。
The principle process of determining the magnetic layer for a susceptibility meter is shown in fig. 3. The change of the thickness of the soil layer in two times represents the loss or accumulation of the soil layer. Here a first magnetic susceptibility K1After the magnetic member is buried, the susceptibility of the topsoil layer, namely the first susceptibility K, is recorded once by using a susceptibility instrument before the soil layer erosion occurs1Other susceptibility values and K in subsequent measurement cycles1And comparing, and calculating to obtain the change condition of the thickness of the soil layer at the position in different time periods.
Step S5: after a preset time interval, measuring a second magnetic susceptibility K of the surface soil layer right above the magnetic layer2。
Here the second magnetic susceptibility K2In particular to the measurement of the magnetic susceptibility of the topsoil layer in the periodic sampling point measurement stage. Determining the measuring frequency according to actual needs, such as fully considering environmental factors, special weather such as wind sand, heavy rain and the like, and measuring the magnetic susceptibility of the surface soil layer of the soil at the sampling point at irregular intervals or at fixed intervals.
Step S6: and calculating the thickness change value of the soil layer according to the conversion equation of the magnetic susceptibility of the soil layer and the thickness of the soil layer.
The relationship between the magnetic susceptibility of the soil layer and the thickness of the soil layer can be expressed by an accurate exponential curve which can be summarized as a conversion equation, and variables involved in the conversion equation comprise Kb、KmAnd magnetic susceptibility of the topsoil layer, in particular K, after embedding the magnetic member therein1Or K2。
In the measurement method provided by the embodiment of the application, a Barton (Bart) company in British is adopted as a susceptibility instrumentingeton), specifically an MS2D power supply and reading meter, an MS2D surface scanning probe, an MS2D handle; the magnetic element contains magnetite powder, cement, fine sand and the like, and is formed by mixing, solidifying and molding. The specific implementation process is as follows: selecting soil of a sample point, and measuring the original magnetic susceptibility K of the soil of the sample pointb(ii) a According to the characteristics of the sampling point soil, reasonable magnetic parts are manufactured, the magnetic strength, the size and the number of the magnetic parts are included, and after the magnetic parts are placed on the upper surface of the sampling point soil, the maximum magnetic susceptibility K is measuredm(ii) a According to the characteristics of the soil of the sampling point, a proper mode is selected to bury the magnetic part at the preset depth of the soil of the sampling point, the depth is matched with the detection range of the MS2D probe, namely, the MS2D probe can be ensured to detect, the magnetic susceptibility is displayed on a reading meter, and the first magnetic susceptibility K is measured1(ii) a Determining the measuring frequency according to actual needs, wherein all the magnetic susceptibility measured by subsequent measurement is called as second magnetic susceptibility K2(ii) a Will Kb、Km、K1、K2Substituting the obtained thickness difference value into the conversion equation, namely the variation of the thickness of the soil layer, and reflecting the degree of erosion of the soil layer within the preset time.
The determination method for measuring the thickness of the soil layer based on the magnetic susceptibility provided by the embodiment of the application has the following advantages: (1) a single soil layer thickness measurement takes only 1-2 seconds. The susceptibility instrument is a high-quality portable instrument, can obtain the measured data in real time in the measuring process, and takes only 1-2 seconds. (2) The measurement precision can be controlled within 2 mm. (3) The soil of the sampling point is hardly disturbed any more, because the soil layer which is subjected to little disturbance can be fully recovered under natural conditions after the magnetic member is buried, and the original state is reached again. (4) And the maintenance is free. Because the magnetic part and the susceptibility instrument are durable devices, particularly after the magnetic part is arranged, no manual maintenance is needed. Thus, little maintenance is required on the equipment throughout the assay cycle. (5) The sampling points are representative. The probe that this application embodiment adopted is the ring shape, for a planar survey scope, and the measurement radius is about 15cm, and magnetic part buries underground in the soil horizon, does not have the disturbance effect to the soil horizon, can not cause the deviation of measurement. (6) The manufacturing cost of the magnetic part and the purchase cost of the susceptibility instrument are both low, so that the total investment for implementing the measuring method provided by the embodiment of the application is small.
The method for measuring the thickness of the soil layer based on the magnetic susceptibility can be applied to scientific research on soil resource protection and water and soil loss monitoring and field monitoring. Specifically, the determination method provided by the embodiment of the application can be applied to (1) rapid determination of soil loss or accumulation of indoor and outdoor soil erosion experiment communities based on water erosion. (2) The long-term positioning monitoring work of the soil loss amount or the soil accumulation amount in the soil erosion field environment based on water erosion. (3) The long-term positioning monitoring work of the soil loss amount or the soil accumulation amount in the soil erosion field environment based on wind erosion.
The determination method provided by the embodiment of the application is particularly suitable for rapidly determining the soil loss and the soil accumulation when the soil erosion research and monitoring work is carried out in remote areas.
Optionally, in step S6, the conversion equation is:
H＝202.68-93.46eK*/(-0.0067)-58.69eK*/(-0.0503)-54.80eK*/(0.3371)
wherein, K*The calculation formula of (2) is as follows:
in the formula, H is the distance between the probe and the magnetic layer, and is mm; k*The magnetic susceptibility of the comprehensive substances is dimensionless; kbOriginal magnetic susceptibility, dimensionless; kmThe magnetic susceptibility is maximum and is dimensionless; k is the magnetic susceptibility of the material measured by the probe and is dimensionless.
Wherein the magnetic susceptibility of the substance represented by K is specifically K1、K2By K in the conversion equation1、K2Calculated H1、H2The difference value deltaH is the thickness change value of the soil at the sampling point after the preset time, and the loss amount or the accumulation amount of the soil at the sampling point can be reflected.
Optionally, the magnetic strength of the magnetic member is 6000-10000, the thickness of the magnetic member is 0.5-1.5cm, and the embedding depth of the magnetic member is less than or equal to 20 cm.
According to the determination method for measuring the thickness of the soil layer based on the magnetic susceptibility provided by the embodiment of the application, the magnetic strength range of the magnetic part is 6000-10000, the coverage area of the magnetic part is determined according to the characteristics of the soil at the sampling point, the shape of the magnetic part can be a round cake shape, a plate shape, a net shape or other layered regular shapes, the thickness range is 0.5-1.5cm, preferably 1.0cm, and the depth of the magnetic part embedded in the soil at the sampling point is not more than 20cm, so that the magnetic layer can be detected by the probe.
Optionally, in step S3, the embedding the magnetic member includes: and excavating and filling to arrange magnetic parts or arranging magnetic parts on the cross section.
The method is characterized in that a more proper embedding mode is selected to embed the magnetic part, for example, field soil, a sandy soil layer has the characteristic of easy breakage, an excavating and filling laying mode is preferably adopted, in the construction process, after sample point soil is excavated, the magnetic part is embedded to be parallel to the upper surface of an original soil layer, and then the original soil is used for covering the magnetic part.
For a cell (soil erosion experiment cell, cell for short), an excavation and arrangement mode can also be adopted.
For the loamy soil layer, certain consolidation can be realized, a profile layout mode can be adopted, soil near the soil of a sampling point is excavated in the construction process, if the range of the soil of the sampling point is 30cm multiplied by 30cm, a side wall is excavated at one side of the soil range close to the sampling point at will, the side wall is used as the bottom surface, a hole with certain thickness and size matched with the magnetic part is excavated towards the soil of the sampling point and parallel to the upper surface of the soil, and then the magnetic part is placed in the hole, so that the soil of the sampling point is completely undisturbed, and the thickness variation of the soil layer can be accurately obtained.
The method for measuring the thickness of the soil layer based on the magnetic susceptibility can quickly and accurately obtain the thickness variation of the soil layer by embedding the magnetic layer in the soil layer and by using a conversion equation of the magnetic susceptibility of the soil layer and the thickness of the soil layer, has no disturbance to original soil, has good soil representativeness of a sample point, has no maintenance cost expenditure in a measurement period, has low equipment investment for implementing measurement, has better practicability in soil resource protection, water and soil loss monitoring scientific research and field monitoring work, and is particularly suitable for carrying out soil erosion research measurement in remote areas and quickly measuring the soil loss and the accumulation during the soil layer monitoring work.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It is to be understood that the present application is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (3)
1. A determination method for measuring the thickness of a soil layer based on magnetic susceptibility is characterized by comprising the following steps:
s1 determination of original magnetic susceptibility K of sample point soil topsoil layerb；
S2 determining the maximum magnetic susceptibility K of the magnetic element placed on the topsoil layerm；
S3, burying the magnetic piece at a preset depth below the sampling point soil to form a magnetic layer;
s4 determining a first susceptibility K of said topsoil layer directly above said magnetic layer1；
S5, measuring the second magnetic susceptibility K of the topsoil layer right above the magnetic layer after a preset time interval2；
S6, calculating the variation value of the soil layer thickness according to the conversion equation of the soil layer magnetic susceptibility and the soil layer thickness,
the conversion equation is:
wherein, K*The calculation formula of (2) is as follows:
wherein H is the distance between the probe and the magnetic layer, and is mm; k*The magnetic susceptibility of the comprehensive substances is dimensionless; kbOriginal magnetic susceptibility, dimensionless; kmThe magnetic susceptibility is maximum and is dimensionless; k is the magnetic susceptibility of the substance measured by the probe and is dimensionless.
2. The method as claimed in claim 1, wherein the magnetic member has a magnetic strength in the range of 6000-10000, a thickness in the range of 0.5-1.5cm, and a buried depth of 20cm or less.
3. The measurement method according to claim 1, wherein embedding the magnetic member in step S3 includes: and excavating and filling to arrange magnetic parts or arranging magnetic parts on the cross section.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811237407.0A CN109115104B (en) | 2018-10-23 | 2018-10-23 | A method for measuring soil layer thickness based on magnetic susceptibility |
| GB2003689.3A GB2583409B (en) | 2018-10-23 | 2018-11-20 | Measuring soil erosion or deposition using magnetic susceptibility |
| PCT/CN2018/116403 WO2020082475A1 (en) | 2018-10-23 | 2018-11-20 | Measurement method for measuring thickness of soil layer based on magnetic susceptibility |
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| CN201811237407.0A CN109115104B (en) | 2018-10-23 | 2018-10-23 | A method for measuring soil layer thickness based on magnetic susceptibility |
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| CN109115104B true CN109115104B (en) | 2020-04-14 |
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| GB (1) | GB2583409B (en) |
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| CN111830238B (en) * | 2020-07-28 | 2024-11-22 | 水利部牧区水利科学研究所 | An automatic monitoring device for wind erosion in sandy areas |
| CN114111553B (en) * | 2021-11-25 | 2023-12-08 | 安徽理工大学 | Method for rapidly obtaining thickness of newly-increased farmland reconstructed soil body filling layer |
| CN115480046A (en) * | 2022-10-11 | 2022-12-16 | 中国科学院地理科学与资源研究所 | Estimation method for predicting soil carbon reserves based on loess thickness |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1148351A1 (en) * | 2000-04-20 | 2001-10-24 | Wolfgang Rösler | Method and device for recording the magnetic susceptibility of soils and/or sediments |
| CN203349778U (en) * | 2013-03-27 | 2013-12-18 | 苏州江南航天机电工业有限公司 | Device for detecting thickness of pouring coverage layer |
| CN206177194U (en) * | 2016-11-24 | 2017-05-17 | 辽宁省水土保持研究所 | Surface soil erosion thickness measuring instrument |
| CN106767371A (en) * | 2016-12-27 | 2017-05-31 | 山东农业大学 | A kind of method that GPR quick detection Reclaimed Soil covers table soil thickness |
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| CA2666251C (en) * | 1999-12-17 | 2012-02-21 | Geosensors Inc. | Modular electromagnetic sensing apparatus having improved calibration |
| CN201327530Y (en) * | 2008-11-14 | 2009-10-14 | 东北大学 | Magnetic susceptibility measuring device based on enhanced Moses effect |
| CN101603946B (en) * | 2009-07-14 | 2012-02-01 | 中国科学院水利部成都山地灾害与环境研究所 | Tillage Erosion Determination Magnetic Tracer Method |
| CN205825948U (en) * | 2016-05-26 | 2016-12-21 | 中交第一航务工程局有限公司 | Marine jackstone dike sedimentation and the measurement apparatus of jackstone thickness |
| CN207832791U (en) * | 2018-01-29 | 2018-09-07 | 北京师范大学 | Soil loss monitoring device |
| CN108535454A (en) * | 2018-07-10 | 2018-09-14 | 北京师范大学 | A kind of soil erosion test system and method |
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2018
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| EP1148351A1 (en) * | 2000-04-20 | 2001-10-24 | Wolfgang Rösler | Method and device for recording the magnetic susceptibility of soils and/or sediments |
| CN203349778U (en) * | 2013-03-27 | 2013-12-18 | 苏州江南航天机电工业有限公司 | Device for detecting thickness of pouring coverage layer |
| CN206177194U (en) * | 2016-11-24 | 2017-05-17 | 辽宁省水土保持研究所 | Surface soil erosion thickness measuring instrument |
| CN106767371A (en) * | 2016-12-27 | 2017-05-31 | 山东农业大学 | A kind of method that GPR quick detection Reclaimed Soil covers table soil thickness |
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| Publication number | Publication date |
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| GB202003689D0 (en) | 2020-04-29 |
| GB2583409A (en) | 2020-10-28 |
| GB2583409B (en) | 2023-02-08 |
| WO2020082475A1 (en) | 2020-04-30 |
| CN109115104A (en) | 2019-01-01 |
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