CN108692969A - A kind of Sandy Soil Moisture monitoring method and system - Google Patents
A kind of Sandy Soil Moisture monitoring method and system Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 196
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- 238000005259 measurement Methods 0.000 claims abstract description 32
- 238000000611 regression analysis Methods 0.000 claims abstract description 9
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- 239000000523 sample Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 5
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- G—PHYSICS
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Abstract
The present invention relates to a kind of Sandy Soil Moisture monitoring method and systems.Method includes:Obtain the resistivity of Sandy Soil vertical cross section different depth soil;The pedotheque of same geodetic different depth soil is taken in layering;The moisture content of the pedotheque is measured, the practical moisture content of different depth soil is obtained;Resistivity and practical moisture content to same depth soil carry out regression analysis, establish the regression model between soil moisture content and resistivity;Checking validity is carried out to the regression model, obtains the optimum regression model for determining Sandy Soil moisture content.Measurement Resolution of the present invention is higher, to soil texture disturb it is small, can relatively deep and continuous monitoring Sandy Soil Moisture.
Description
Technical field
The present invention relates to Study On Intelligent Monitoring Techniques field more particularly to a kind of Sandy Soil Moisture monitoring methods and system.
Background technology
Most water needed for growth and development of plants absorb the soil water by root system and obtain.Sandy Soil Moisture is
Husky area's plant life, growth and development main limiting factor, to husky area's vegetation restoration and reconstruction have greatly it is restricted.Research is husky
Ground soil water space-time dynamic, it is accurate to grasp soil desiccation situation, limited water resources could be adequately and reasonably utilized, could not be lost
Corresponding technical measures are taken to opportunity to meet the needs of vegetation is to moisture, for husky area vegetation restoration and reconstruction provide science according to
According to.Therefore, accurately determine Sandy Soil Moisture, in theory with important meaning is suffered from production.
The monitoring method of Sandy Soil Moisture, the method used on different spaces scale are different.It is on point scale to adopt more
With oven drying method, Neutron probe method, time-domain reflectomer method and moisture transducer method.Oven drying method measurement result is most accurate, but needs from open country
The outer a large amount of soil sample of acquisition, it is more time-consuming;Neutron probe method, time-domain reflectomer method and moisture transducer method be current application compared with
More methods, but be both needed to excavate the embedded pipe of soil profile, probe, it is larger to the destruction of soil prototype structure in this way, and monitor
Soil finite volume.It adopts remote sensing techniques in large scale, remote sensing technology realizes monitoring soil moisture from " point scale " to " big ruler
The conversion of degree ", but its spatial resolution is low, and surface layer (0-10cm is deep) soil moisture content can only be estimated by remotely-sensed data, it surveys
It is inadequate to measure depth.In addition, also being influenced by vegetation and mima type microrelief during remote sensing monitoring.
Invention content
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide, a kind of scale is medium, resolution ratio
It is higher, to soil texture disturb it is small, can relatively deep and continuous monitoring Sandy Soil Moisture monitoring method and system.
The technical solution that the present invention solves above-mentioned technical problem is as follows:A kind of Sandy Soil Moisture monitoring method, including such as
Lower step:
S1 obtains the resistivity of Sandy Soil vertical cross section different depth soil;
The pedotheque of same geodetic different depth soil is taken in S2, layering;
S3 measures the moisture content of the pedotheque, obtains the practical moisture content of different depth soil;
S4, resistivity and practical moisture content to same depth soil carry out regression analysis, establish soil moisture content and electricity
Regression model between resistance rate;
S5 carries out checking validity to the regression model, obtains the optimum regression for determining Sandy Soil moisture content
Model.
Another technical solution that the present invention solves above-mentioned technical problem is as follows:A kind of Sandy Soil Moisture monitoring system, packet
Include multi-electrode resistance instrument, practical measurement of water-content coefficient equipment and calculating treatmenting equipment;
The multi-electrode resistance instrument, the resistivity for obtaining Sandy Soil vertical cross section different depth soil;
The practical measurement of water-content coefficient equipment is surveyed for being layered the pedotheque for taking same geodetic different depth soil
The moisture content of the fixed pedotheque, obtains the practical moisture content of different depth soil;
The calculating treatmenting equipment carries out regression analysis for the resistivity to same depth soil with practical moisture content,
Establish the regression model between soil moisture content and resistivity;It is additionally operable to carry out checking validity to the regression model, obtain
Optimum regression model for determining Sandy Soil moisture content.
The beneficial effects of the invention are as follows:The present invention practical moisture content of sampling measurement different depth soil and corresponding in advance
Resistivity establishes the regression model between soil moisture content and resistivity, and the later stage need to only utilize multi-electrode resistance instrument to measure soil
Resistivity, so that it may which to obtain soil moisture content according to regression model, it is more quick accurate to measure, and Measurement Resolution is higher, to soil
Earth structural perturbation is small, can relatively deep and continuous monitoring Sandy Soil Moisture.
Description of the drawings
Fig. 1 is the schematic flow chart of Sandy Soil Moisture monitoring method provided in an embodiment of the present invention;
Fig. 2 is each component connection diagram of multi-electrode resistance instrument in the embodiment of the present invention;
Fig. 3 is measuring point data schematic diagram on soil profile in the embodiment of the present invention;
Fig. 4 is soil moisture content and resistivity optimum regression relational graph in the embodiment of the present invention;
Fig. 5 is soil moisture content computation model accuracy test figure in the embodiment of the present invention;
Fig. 6 is different time sections soil moisture content Spatial Distribution Pattern figure in the embodiment of the present invention;
Fig. 7 is that Sandy Soil Moisture provided in an embodiment of the present invention monitors system block diagram.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 gives a kind of schematic flow chart of Sandy Soil Moisture monitoring method provided in an embodiment of the present invention.Such as
Shown in Fig. 1, this method includes:
S1 obtains the resistivity of Sandy Soil vertical cross section different depth soil;
The pedotheque of same geodetic different depth soil is taken in S2, layering;
S3 measures the moisture content of the pedotheque, obtains the practical moisture content of different depth soil;
S4, resistivity and practical moisture content to same depth soil carry out regression analysis, establish soil moisture content and electricity
Regression model between resistance rate;
S5 carries out checking validity to the regression model, obtains the optimum regression for determining Sandy Soil moisture content
Model.
Wherein, coefficient of multiple correlation R2Maximum, and the model of fit of level of signifiance P minimums is optimum regression model.
In above-described embodiment, the practical moisture content of sampling measurement different depth soil and corresponding resistivity, are established in advance
Regression model between soil moisture content and resistivity, later stage need to only utilize multi-electrode resistance instrument to measure soil resistivity, so that it may
To obtain soil moisture content according to regression model, it is more quick accurate to measure, resolution ratio is higher, to soil texture disturb it is small, can
Relatively deep and continuous monitoring Sandy Soil Moisture.
As shown in Fig. 2, multi-electrode resistance instrument includes host, cable, connecting line and Duo Gen electrodes.
Preferably, the resistivity for obtaining Sandy Soil vertical cross section different depth soil includes:It is chosen in monitoring
Survey line, lays more electrodes of the more electrode resistance instrument on the survey line, and more electrodes pass through connecting line and cable connection, institute
Cable is stated to connect with host;By the measurement level and measuring point quantity of every electrode of host setting, multiple surveys are obtained by electrode
The resistivity of point, and inverting is carried out to the resistivity of the multiple measuring point, obtain the default multiple inverting measuring points for measuring the number of plies
Resistivity.In the embodiment, multi-electrode resistance instrument includes 1 host, 24 electrodes and 2 multiplex roles cables.Wherein, electrode is long
Degree is 30cm, a diameter of 1cm.When measuring on the spot, the distance between electrode can be arbitrarily arranged according to requirement of experiment, Different electrodes
The surveyed precision of spacing is different, is specifically shown in Table 1.Wherein, maximum spacing is 5m, longest survey line 115m, most deep measurable 19.6m.
Table 1
| Electrode spacing/m | Survey depth/m | Inverting depth/m |
| 5.0 | 2.56,5.12,7.68,10.2,12.8,15.4,17.9 | 0.94,2.91,5.07,7.45,10.07,12.96,16.13,19.62 |
| 2.0 | 1.02,2.05,3.07,4.10,5.12,6.14,7.17 | 0.38,1.16,2.03,2.98,4.03,5.18,6.45,7.85 |
| 1.0 | 0.51,1.02,1.54,2.05,2.56,3.07,3.58 | 0.19,0.58,1.01,1.49,2.01,2.59,3.23,3.92 |
| 0.5 | 0.25,0.51,0.76,1.02,1.28,1.54,1.79 | 0.09,0.29,0.51,0.75,1.01,1.30,1.61,1.96 |
In above-described embodiment, using multi-electrode resistance instrument, the resistivity for measuring ground different depth soil is can get, to root
According to the regression model between soil moisture content and resistivity, obtain measuring ground soil moisture content;Multi-electrode resistance instrument is disposably pacified
Without adjustment after dress, and it is small to soil texture disturbance, it can profound and continuous monitoring Sandy Soil Moisture space-time dynamic.
Preferably, the pedotheque of different depth soil is taken in layering, measures the moisture content of the pedotheque, obtains not
Practical moisture content with deep soil includes:The sampled point that preset quantity is chosen on the survey line, divides on each sampled point
Layer takes the pedotheque of different depth soil, measures the moisture content of the pedotheque, obtains the reality of different depth soil
Moisture content;Wherein, the position of inverting measuring point is corresponding after sampling depth is measured with multi-electrode resistance instrument.
In the embodiment, several points earth boring auger acquiring soil samples by layering, earth boring auger stratified sampling point are selected on survey line
It is corresponding with resistance instrument measuring point, as shown in Figure 3.The reality that each pedotheque that oven drying method measurement is taken may be used is aqueous
Rate.
In above-described embodiment, when establishing the regression model between soil moisture content and resistivity, sampling analysis part is only needed
Soil there is no disturbance to soil texture.
Preferably, the resistivity to same depth soil and practical moisture content carry out regression analysis, establish soil and contain
Regression model between water rate and resistivity includes:
The resistivity of same depth soil and practical moisture content are subjected to optimal fitting, establish soil moisture content and resistivity
Between regression model, model formation is as follows:
Y=axb,
Wherein, y is the practical moisture content of soil, and x is soil resistivity, and a, b are constant.
In above-described embodiment, the regression model between soil moisture content and resistivity is established, the later stage need to only utilize multi-electrode
Resistance instrument measures soil resistivity, so that it may which, to obtain soil moisture content, it is more quick accurate to measure.
Preferably, further include the resistivity value for obtaining all measuring points of Sandy Soil vertical cross section, according to the optimum regression
Model determines the soil moisture content of all measuring points, draws soil moisture content vertical section Spatial Distribution Pattern figure.In the embodiment,
Soil moisture content vertical section Spatial Distribution Pattern figure is drawn using computer software, measurement result is more intuitive.
With reference to a specific embodiment, the present invention will be described in detail.In the embodiment, electrode spacing is chosen for
2/3rds length thereofs of every electrode are pounded in soil with rubber hammer, are connected all electrodes with cable by 0.5m
And connect with host, finally start to measure.
As shown in figure 3, it is 84 that reality, which measures measuring point data on acquired soil profile, (1~7 layer) is every from top to bottom
The measuring point of layer is respectively 21,18,15,12,9,6,3;To fathom be 0.25 respectively, 0.51,0.76,1.02,1.28,
1.54,1.79m。
Measurement data is 120 point datas after 3.4 software invertings of Res 2D Inv ver, from top to bottom (1~8 layer)
Every layer of measuring point number is respectively 21,21,19,17,15,11,9,7, depth is 0.09 respectively, 0.29,0.51,0.75,1.01,
1.30,1.61,1.96m。
After resistivity has been surveyed, 3 Soil Sample points are selected on survey line, soil sample is taken with the earth boring auger of diameter 3cm.Sampling is deep
Spend with resistance instrument measure after inverting measuring point position it is corresponding, respectively 0.10 (0.09), 0.30 (0.29), 0.50 (0.51),
0.75(0.75),1.00(1.01)cm.3 red lines are the 3 soil sample sections selected in measurement process in figure, respectively the
Between 8~9 electrodes (at the 3.25m of horizontal position), between the 12nd~13 electrode (at the 5.75m of horizontal position) and the 16th~17
Between a electrode (at the 7.75m of horizontal position).The soil sample of acquisition is collected with hermetic bag, is taken back use for laboratory oven drying method and is measured reality
Moisture content.
The data (N=45) of measurement are randomly divided into two groups.1 (N of data group1=30) it is used for establishing the practical moisture content of soil
Regression relation y=92.5x between resistivity-0.643, y is the practical moisture content of soil, and x is soil resistivity, as shown in Figure 4;
2 (N of data group2=15) be used for testing model conspicuousness, through examine, by regression model calculate soil moisture content (y) with
It is linear relationship y=0.846x+0.8877 between the soil moisture content (x) of practical measurement, and has reached the pole level of signifiance (R2=
0.9119, P<0.01), as shown in Figure 5.
As shown in fig. 6, the resistivity data that 3 different time sections are measured every time substitutes into equation y=92.5x-0.643, change
It is counted as soil moisture content value, then uses 8.0 Software on Drawing soil moisture content Spatial Distribution Pattern figures of Surfer.
In the embodiment, continuous prison has been carried out by the planted shrubs soil moisture to northeast of Wulanbuhe desert
It surveys, monitoring time is the 19 days-October 12 of August in 2016.August has precipitation event larger twice, precipitation in 17 days and 18 days
Afterwards, the 1st measurement of August 19 days (after 1 day), is denoted as CL1, the measurement of September 2 days (after 15 days) the 2nd time is denoted as CL2, October 12
The 3rd measurement of day (after 55 days), is denoted as CL3, September do not have big catchment between 2-October 12.
By 3 continuous monitoring data, establish the practical moisture content of sand ground planted shrubs soil and soil resistivity it
Between relational model y=92.5x-0.643, y is the practical moisture content of soil, and x is soil resistivity, as shown in Figure 4.Through examining, model
The pole level of signifiance (R is reached2=0.9119, P<0.01), as shown in Figure 5.
The two dimensional cross-section soil resistivity data that 3 times are monitored substitute into equation y=92.5x-0.643, obtain soil water-containing
Rate value is charted using 8.0 softwares of Surfer, obtains 3 different time sections soil moisture content two-dimensional space Distribution Pattern situations,
As shown in fig. 6, monitoring result reflects the soil water regime in Sandy shrubs forest land well.
Above in association with Fig. 1 to Fig. 6, the Sandy Soil Moisture monitoring side provided according to embodiments of the present invention is described in detail
Method.With reference to Fig. 7, Sandy Soil Moisture monitoring system provided in an embodiment of the present invention is described in detail.The system includes mostly electric
Electrode resistance instrument, practical measurement of water-content coefficient equipment and calculating treatmenting equipment.
Multi-electrode resistance instrument is used to obtain the resistivity of Sandy Soil vertical cross section different depth soil;Practical moisture content is surveyed
Locking equipment measures the moisture content of the pedotheque, obtains for being layered the pedotheque for taking same geodetic different depth soil
Take the practical moisture content of different depth soil;Calculating treatmenting equipment is used for the resistivity to same depth soil and practical moisture content
Regression analysis is carried out, the regression model between soil moisture content and resistivity is established, is additionally operable to show the regression model
The verification of work property, obtains the optimum regression model for determining Sandy Soil moisture content.
In above-described embodiment, the practical moisture content of sampling measurement different depth soil and corresponding resistivity, are established in advance
Regression model between soil moisture content and resistivity, later stage need to only utilize multi-electrode resistance instrument to measure soil resistivity, so that it may
To obtain soil moisture content, it is more quick accurate to measure, resolution ratio is higher, to soil texture disturb it is small, can relatively deep and length
Phase continuously monitors Sandy Soil Moisture.
Preferably, multi-electrode resistance instrument includes host, cable, connecting line and Duo Gen electrodes, and more electrodes pass through connecting line
With cable connection, the cable is connect with host;When measurement, survey line is chosen in monitoring, multi-electrode is laid on the survey line
More electrodes of resistance instrument obtain multiple surveys by the measurement level and measuring point quantity of every electrode of host setting by electrode
The resistivity of point, and inverting is carried out to the resistivity of the multiple measuring point, obtain the default multiple inverting measuring points for measuring the number of plies
Resistivity.
In above-described embodiment, using multi-electrode resistance instrument, the resistivity for measuring ground different depth soil is can get, to root
According to the regression model between soil moisture content and resistivity, obtain measuring ground soil moisture content;Multi-electrode resistance instrument is disposably pacified
It, can profound and continuous monitoring Sandy Soil Moisture space-time dynamic without adjustment after dress.
Preferably, practical measurement of water-content coefficient equipment is specifically used for choosing the sampled point of preset quantity on the survey line,
Each sampled point higher slice takes the pedotheque of different depth soil, measures the moisture content of the pedotheque, obtains different
The practical moisture content of deep soil;Wherein, the position of inverting measuring point is corresponding after sampling depth is measured with multi-electrode resistance instrument.
In above-described embodiment, when establishing the regression model between soil moisture content and resistivity, sampling analysis part is only needed
Soil there is no disturbance to soil texture.
Preferably, calculating treatmenting equipment is used to carry out the resistivity of same depth soil and practical moisture content optimal quasi-
It closes, establishes the regression model between soil moisture content and resistivity, model formation is as follows:
Y=axb,
Wherein, y is the practical moisture content of soil, and x is soil resistivity, and a, b are constant.
Calculating treatmenting equipment is additionally operable to obtain the resistivity value of all measuring points of Sandy Soil vertical cross section, according to described optimal
Regression model determines the soil moisture content of all measuring points, and draws soil moisture content vertical section Spatial Distribution Pattern figure.
In above-described embodiment, the regression model between soil moisture content and resistivity is established, the later stage need to only utilize multi-electrode
Resistance instrument measures soil resistivity, so that it may which, to obtain soil moisture content, it is more quick accurate to measure, resolution ratio higher;Utilize meter
Calculation machine Software on Drawing soil moisture content vertical section Spatial Distribution Pattern figure, measurement result are more intuitive.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of Sandy Soil Moisture monitoring method, which is characterized in that include the following steps:
Obtain the resistivity of Sandy Soil vertical cross section different depth soil;
The pedotheque of same geodetic different depth soil is taken in layering;
The moisture content of the pedotheque is measured, the practical moisture content of different depth soil is obtained;
Resistivity and practical moisture content to same depth soil carry out regression analysis, establish between soil moisture content and resistivity
Regression model;
Checking validity is carried out to the regression model, obtains the optimum regression model for determining Sandy Soil moisture content.
2. according to the method described in claim 1, it is characterized in that, the acquisition Sandy Soil vertical cross section different depth soil
Resistivity include:
Survey line is chosen in monitoring, more electrodes of multi-electrode resistance instrument are laid on the survey line, more electrodes pass through connection
Line and cable connection, the cable are connect with host;
By the measurement level and measuring point quantity of every electrode of host setting, the resistivity of multiple measuring points is obtained by electrode, and
Inverting is carried out to the resistivity of the multiple measuring point, obtains the resistivity of the default multiple inverting measuring points for measuring the number of plies.
3. according to the method described in claim 2, it is characterized in that, described be layered the soil for taking same geodetic different depth soil
Earth sample measures the moisture content of the pedotheque, and the practical moisture content for obtaining different depth soil includes:
The sampled point that preset quantity is chosen on the survey line, the soil of different depth soil is taken in each sampled point higher slice
Sample measures the moisture content of the pedotheque, obtains the practical moisture content of different depth soil;Wherein, sampling depth with it is more
The position of inverting measuring point is corresponding after electrode resistance instrument measures.
4. according to the method described in claim 1, it is characterized in that, the resistivity to same depth soil and reality are aqueous
Rate carries out regression analysis, and the regression model established between soil moisture content and resistivity includes:
The resistivity of same depth soil and practical moisture content are subjected to optimal fitting, established between soil moisture content and resistivity
Regression model, model formation is as follows:
Y=axb,
Wherein, y is the practical moisture content of soil, and x is soil resistivity, and a, b are constant.
5. according to claim 2 to 4 any one of them method, which is characterized in that further include obtaining Sandy Soil vertical cross section
The resistivity value of all measuring points, the soil moisture content of all measuring points is determined according to the optimum regression model, and is drawn soil and contained
Water rate vertical section Spatial Distribution Pattern figure.
6. a kind of Sandy Soil Moisture monitors system, which is characterized in that including multi-electrode resistance instrument, practical measurement of water-content coefficient equipment
And calculating treatmenting equipment;
The multi-electrode resistance instrument, the resistivity for obtaining Sandy Soil vertical cross section different depth soil;
The practical measurement of water-content coefficient equipment measures institute for being layered the pedotheque for taking same geodetic different depth soil
The moisture content of pedotheque is stated, the practical moisture content of different depth soil is obtained;
The calculating treatmenting equipment carries out regression analysis with practical moisture content for the resistivity to same depth soil, establishes
Regression model between soil moisture content and resistivity;
It is additionally operable to carry out checking validity to the regression model, obtains the optimum regression mould for determining Sandy Soil moisture content
Type.
7. system according to claim 6, which is characterized in that the multi-electrode resistance instrument includes more electrodes, more electricity
Pole is connect by connecting line and cable connection, the cable with host;When measurement, survey line is chosen in monitoring, in the survey line
Upper more electrodes for laying multi-electrode resistance instrument pass through electricity by the measurement level and measuring point quantity of every electrode of host setting
Pole obtains the resistivity of multiple measuring points, and carries out inverting to the resistivity of the multiple measuring point, obtains the more of the default measurement number of plies
The resistivity of a inverting measuring point.
8. system according to claim 7, which is characterized in that the practical measurement of water-content coefficient equipment is specifically used for described
The sampled point that preset quantity is chosen on survey line, the pedotheque of different depth soil is taken in each sampled point higher slice, is measured
The moisture content of the pedotheque obtains the practical moisture content of different depth soil;Wherein, sampling depth and multi-electrode resistance instrument
The position of inverting measuring point is corresponding after measurement.
9. system according to claim 6, which is characterized in that the calculating treatmenting equipment is used for same depth soil
Resistivity and practical moisture content carry out optimal fitting, establish the regression model between soil moisture content and resistivity, model formation
It is as follows:
Y=axb,
Wherein, y is the practical moisture content of soil, and x is soil resistivity, and a, b are constant.
10. system according to any one of claims 7 to 9, which is characterized in that the calculating treatmenting equipment is additionally operable to obtain
The resistivity value of all measuring points of Sandy Soil vertical cross section, the soil water-containing of all measuring points is determined according to the optimum regression model
Rate, and draw soil moisture content vertical section Spatial Distribution Pattern figure.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884131A (en) * | 2019-02-23 | 2019-06-14 | 机械工业勘察设计研究院有限公司 | One kind soil layer in submerging test of testing pits soaks lossless continuous probe method |
| CN112162014A (en) * | 2020-09-02 | 2021-01-01 | 塔里木大学 | Cotton field soil profile water data processing method based on electromagnetic induction data |
| CN113049641A (en) * | 2021-03-12 | 2021-06-29 | 华东交通大学 | Method for measuring water content of soil body |
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| CN112162014A (en) * | 2020-09-02 | 2021-01-01 | 塔里木大学 | Cotton field soil profile water data processing method based on electromagnetic induction data |
| CN113049641A (en) * | 2021-03-12 | 2021-06-29 | 华东交通大学 | Method for measuring water content of soil body |
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Application publication date: 20181023 |