Method, device and equipment for identifying middle stable layer of soil moisture content

Abstract

The invention relates to the technical field of soil analysis, in particular to a method, a device and equipment for identifying a middle stable layer of soil moisture content, and the method is characterized in that on the basis of an original method for determining the middle stable layer of the soil moisture content based on a method for determining response time of the soil moisture content after a rainfall event. By analyzing the power spectrum density of the soil moisture content at different point positions of the monitoring profile in the drought period, the soil moisture content middle stable layer can be identified in the drought period, and the application conditions and climate conditions of identification of the soil moisture content middle stable layer are expanded. On the basis, the method is combined with an original method, and the identification efficiency and accuracy of the soil moisture content middle stable layer are improved in a mode of taking an intersection through the two methods.

Description

Technical Field

[0001] The present invention relates to the technical field of soil analysis, and in particular to a method, a device and equipment for identifying an intermediate stable layer of soil moisture content. Background Art

[0002] In the process of water migration in the vadose zone, the vertical flow velocity of the water flux is often more than 100 times the horizontal flow velocity. Therefore, the horizontal flow velocity of the water flux in the vadose zone can be ignored. Studying the vertical migration characteristics of the water flux in the vadose zone can explore the law of water migration in the vadose zone. Therefore, the researchers set up soil monitoring profiles and placed monitoring instruments at different depths in the vertical direction of the vadose zone to explore the changing law of soil moisture content, and then determine the flow characteristics of soil water in the vadose zone and the coupling relationship between soil water and groundwater. Under normal conditions, after a precipitation event, as water gradually infiltrates downward, the response time of soil moisture content to precipitation increases with depth. Under the influence of natural conditions such as surface evaporation, the daily fluctuation amplitude of soil moisture content decreases with depth. This is the damping effect of the vadose zone. However, in shallow groundwater areas, due to the groundwater's proximity to the surface, the groundwater level in the thinner part of the region fluctuates violently, which in turn affects the groundwater level fluctuations near that location. The groundwater level fluctuations will also affect the water migration in the vadose zone vertically upward along the vadose zone. In this environment, the soil water in the vadose zone is affected by two driving mechanisms: the upper part is affected by the surface meteorological conditions, and the lower part is affected by the groundwater level fluctuations. The effects of these two driving forces make the soil water least affected in the middle of the vadose zone, and the soil moisture content fluctuates the least, which is the middle stable layer of soil moisture content.

[0003] The existing method for identifying the intermediate stable layer of soil moisture content is to judge it based on the response time of soil moisture content to rainfall events. The specific method is to take the moment when the soil moisture content rises to 10% of the soil moisture content before rainfall after a rainfall event as the response time, and to obtain the response time by taking the difference between the response time and the moment when the rainfall event occurs. The presence of the intermediate stable layer of soil moisture content is judged by whether the response time increases unidirectionally downward along the soil profile. After judging that the intermediate stable layer of soil moisture content exists in the soil profile, the development position of the intermediate stable layer of soil moisture content is determined by the longest position of the response time. The change of precipitation interferes with the identification result, which makes the existing method inaccurate in identifying the intermediate stable layer of soil moisture content in actual operation. For arid and semi-arid areas with scarce precipitation, the limited number of precipitations is not enough to use this method to accurately identify the specific location of the intermediate stable layer of soil moisture content, and it is even impossible to determine whether the intermediate stable layer of soil moisture content exists. At present, there is no technical means to accurately identify the intermediate stable layer of soil moisture content under arid climate conditions, let alone combine the daily fluctuation characteristics of soil moisture content with the response characteristics of soil moisture content to rainfall events for comprehensive analysis, so as to determine whether the intermediate stable layer of soil moisture content exists and accurately determine the location of the intermediate stable layer of soil moisture content. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a method, device and equipment for identifying an intermediate stable layer of soil moisture content, so as to overcome the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: In a first aspect, the present application provides a method for identifying an intermediate stable layer of soil moisture content, comprising: Obtain the measured data set of soil moisture content in the monitoring profile; Preprocessing the measured data set, and dividing the measured data set according to meteorological conditions; wherein the divided measured data set includes at least one of a precipitation period measured data set and a drought period measured data set; Determine the middle stable layer of soil moisture content of all the divided measured data sets; The soil moisture intermediate stable layer of the monitoring section is determined according to the soil moisture intermediate stable layer of all the divided measured data sets.

[0006] Furthermore, in the above method, the step of obtaining a measured data set of soil moisture content of the monitoring section includes: Determine at least 3 monitoring points of the monitoring section; Obtain continuous time series samples of the measured data set of soil moisture content at each monitoring point; wherein the time span of the measured data set of each monitoring point is at least 1 day, the amount of data per day is at least 12, and the meteorological conditions at the time of collection include at least one of a rainfall scenario and a drought scenario.

[0007] Furthermore, in the method described above, the preprocessing of the measured data set and the division of the measured data set according to meteorological conditions include: The measured data set is divided by monitoring data statistical methods and according to the meteorological conditions when the data are collected.

[0008] Furthermore, the method described above, determining the intermediate stable layer of soil moisture content of the measured data set during the precipitation period, comprises: Determine the moisture content of soil at each depth at the initial moment of the rainfall scenario according to the measured data set during the rainfall period; The moment when soil moisture content rises by 10% after precipitation is defined as the soil moisture response point, and the response time of each soil depth is determined; According to the response time of each soil depth, the intermediate stable layer of soil moisture content in the precipitation period of the monitoring profile is determined.

[0009] Furthermore, the method described above, determining the intermediate stable layer of soil moisture content of the drought period measured data set, comprises: Performing fast Fourier transform on the drought period measured data set to obtain power spectrum density of different frequencies; According to the power spectrum density of the different frequencies, the variation pattern of the drought period measured data set over time is converted into a frequency feature; Monitor the power spectrum density of soil at different depths with a preset time period; According to the power spectrum density of the soil at different depths, the intermediate stable layer of soil moisture content in the monitoring section during the drought period is determined.

[0010] Furthermore, the method described above, wherein determining the intermediate stable layer of soil moisture content of the monitoring section according to the intermediate stable layer of soil moisture content of all the divided measured data sets, comprises: When the measured data set includes both the measured data set in the precipitation period and the measured data set in the drought period, determining the soil depth of the intermediate stable layer of soil moisture content in the monitoring section in the precipitation period and the soil depth of the intermediate stable layer of soil moisture content in the monitoring section in the drought period; Determine the overlapping part of the soil depth of the intermediate stable layer of soil moisture content in the monitoring section during the precipitation period and the soil depth of the intermediate stable layer of soil moisture content in the monitoring section during the drought period; Determine the soil depth of the overlapping portion as the middle stable layer of soil moisture content of the monitoring section; When the measured data set only has a measured data set during the precipitation period, the soil moisture content intermediate stable layer measured according to the measured data set during the precipitation period is determined as the soil moisture content intermediate stable layer of the monitoring section; When the measured data set only has the drought period measured data set, the soil moisture content intermediate stable layer measured according to the drought period measured data set is determined as the soil moisture content intermediate stable layer of the monitoring section.

[0011] In a second aspect, the present application provides a device for identifying an intermediate stable layer of soil moisture content, comprising: A data acquisition module is used to obtain a measured data set of soil moisture content in the monitoring profile; A data preprocessing module, used to preprocess the measured data set and divide the measured data set according to meteorological conditions; wherein the divided measured data set includes at least one of a precipitation period measured data set and a drought period measured data set; A subset soil moisture content intermediate stable layer determination module is used to determine the soil moisture content intermediate stable layer of all the divided measured data sets; The soil moisture intermediate stable layer determination module is used to determine the soil moisture intermediate stable layer of the monitoring section according to the soil moisture intermediate stable layers of all the divided measured data sets.

[0012] In a third aspect, the present application provides a device for identifying an intermediate stable layer of soil moisture content, including a processor and a memory, wherein the processor is connected to the memory: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store the program, and the program is used to execute at least any one of the methods for identifying an intermediate stable layer of soil moisture content as described above.

[0013] The beneficial effects of the present invention are: 1. Added new judgment indicators: The traditional method only analyzes and processes the data during the precipitation period to determine the intermediate stable layer of soil moisture content, while this method also analyzes and processes the data during the drought period and can also determine the intermediate stable layer of soil moisture content.

[0014] 2. The identification method is more objective: In the past, traditional statistical methods were used to identify the soil moisture response moment (soil moisture content increased by 10%), which would result in human errors. This method is based on the Fourier transform method to identify the intermediate stable layer of soil moisture content during the drought period. Compared with traditional statistical methods, this processing method is simpler, has fewer sources of error, and is more accurate.

[0015] 3. Complementary with traditional methods: Based on the traditional method of judging the intermediate stable layer of soil moisture content based on the response time of soil moisture content after precipitation, the difference in the daily fluctuation amplitude of soil moisture content during the drought period is introduced to judge the intermediate stable layer of soil moisture content. The two independent methods of precipitation period and drought period jointly identify the intermediate stable layer of soil moisture content, making the identification result more stable and accurate.

[0016] 4. Applicable to a wider range of environments: Compared with the traditional method that only judges the intermediate stable layer of soil moisture based on the response time of soil moisture content during the precipitation period, the new method can analyze the daily dynamics of soil moisture content during the drought period and then judge whether the intermediate stable layer of soil moisture content is developed. This means that the new identification method of the intermediate stable layer of soil moisture content covers the entire non-freezing period, which makes it possible to effectively identify the intermediate stable layer of soil moisture content in arid and semi-arid areas with scarce precipitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a flow chart provided by an embodiment of a method for identifying an intermediate stable layer of soil moisture content of the present invention; Figure 2 It is a structural schematic diagram provided by an embodiment of a device for identifying an intermediate stable layer of soil moisture content of the present invention; Figure 3 It is a structural schematic diagram provided by an embodiment of a device for identifying an intermediate stable layer of soil moisture content of the present invention; Figure 4 A characteristic diagram of soil moisture content during a precipitation period and precipitation response time analysis provided by an embodiment of a method for identifying an intermediate stable layer of soil moisture content of the present invention; Figure 5 A power spectrum density characteristic diagram of a soil moisture intermediate stable layer in a drought period provided by an embodiment of a method for identifying a soil moisture intermediate stable layer of the present invention; Figure 6 An embodiment of a method for identifying an intermediate stable layer of soil moisture content of the present invention provides a power spectrum density characteristic diagram of an intermediate stable layer of soil moisture content at different time periods during a drought period. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0020] Figure 1 This is a flow chart provided by an embodiment of a method for identifying an intermediate stable layer of soil moisture content of the present invention. Figure 1 , this embodiment may include the following steps: S1. Obtain the measured data set of soil moisture content of the monitoring profile; S2, preprocessing the measured data set, and dividing the measured data set according to meteorological conditions; wherein the divided measured data set includes at least one of a precipitation period measured data set and a drought period measured data set; S3, determining the middle stable layer of soil moisture content of all divided measured data sets; S4. Determine the intermediate stable layer of soil moisture content of the monitoring profile according to the intermediate stable layer of soil moisture content of all divided measured data sets.

[0021] It can be understood that in this embodiment, the measured data set of soil moisture content of the monitoring profile is first obtained, and then the measured data set is preprocessed, the measured data set is divided according to meteorological conditions, and then the soil moisture content intermediate stable layer of all the divided measured data sets is determined, and finally the soil moisture content intermediate stable layer of the monitoring profile is determined according to the soil moisture content intermediate stable layer of all the divided measured data sets. In this embodiment, on the basis of the original method of determining the soil moisture content intermediate stable layer based on the soil moisture content response time after the precipitation event, the method of identifying the soil moisture content intermediate stable layer based on the daily fluctuation amplitude characteristics of the soil moisture content during the drought period is introduced, and combined with the original method, the efficiency and accuracy of identifying the soil moisture content intermediate stable layer are increased by taking the intersection of the two methods.

[0022] Preferably, step S1 comprises: Determine at least 3 monitoring points for the monitoring profile; Obtain continuous time series samples of the measured data set of soil moisture content at each monitoring point; wherein, the time span of the measured data set of each monitoring point is at least 1 day, the amount of data per day is at least 12, and the meteorological conditions at the time of collection include at least one of a rainfall scenario and a drought scenario.

[0023] Preferably, step S2 comprises: The measured data set is divided by monitoring data statistical methods and according to the meteorological conditions when the data were collected.

[0024] Preferably, determining the intermediate stable layer of soil moisture content of the measured data set during the precipitation period includes: Based on the measured data set during the precipitation period, the soil moisture content at each depth at the initial moment of the rainfall scenario was determined; The moment when soil moisture content rises by 10% after precipitation is defined as the soil moisture response point, and the response time of each soil depth is determined; According to the response time at each soil depth, the intermediate stable layer of soil moisture content in the precipitation period of the monitoring profile is determined.

[0025] It can be understood that the data of the precipitation period in the measured data set during the precipitation period are selected, and the moment when the soil moisture content rises by 10% after precipitation is defined as the soil moisture response point, and then the moment of starting the precipitation event is subtracted and recorded as the soil moisture response time. This method is used to determine the response time of monitoring points at different positions in the entire profile. Next, the variation pattern of the soil moisture response time along the depth is determined. If the response time increases successively along the depth, there is no intermediate stable layer of soil moisture content. Otherwise, there is an intermediate stable layer of soil moisture content, and its depth is where the response time is the longest. Figure 4 As shown, Figure 4 The soil moisture response time in a1-e1 increases one-way downward along the soil profile, and there is no intermediate stable layer of soil moisture content. Figure 4 In a2-e2, the soil moisture response time increases non-sequentially and unidirectionally downward along the soil profile. There is a maximum value in the middle of the soil profile (marked by the dotted box), which is the intermediate stable layer of soil moisture content.

[0026] Preferably, determining the middle stable layer of soil moisture content of the measured data set during the drought period includes: Fast Fourier transform was performed on the measured data set during the drought period to obtain the power spectral density of different frequencies; According to the power spectrum density of different frequencies, the temporal variation of the measured data set during the drought period is transformed into frequency characteristics; Monitor the power spectrum density of soil at different depths with a preset time period; According to the power spectrum density at different soil depths, the intermediate stable layer of soil moisture content in the monitoring profile during the drought period is determined.

[0027] It can be understood that the drought period data is fast Fourier transformed based on the relevant code written in MATLAB, and the power spectrum density of different frequencies of the data is further processed to obtain the change pattern of the data over time into frequency characteristics. Next, the power spectrum density of different monitoring points in the monitoring profile with a period of 1 day (24 hours) is analyzed to determine the change pattern of the power spectrum density of soil moisture along the depth. If the power spectrum density gradually decreases along the depth, there is no intermediate stable layer of soil moisture content. Otherwise, there is an intermediate stable layer of soil moisture content, and its depth is the point where the power spectrum density is the minimum. Figure 5 As shown in Figure 2, the power spectrum density decreases unidirectionally along the soil profile downward, and there is no intermediate stable layer of soil moisture content; Figure 6 As shown in the figure, the power spectrum density decreases non-sequentially and unidirectionally downward along the soil profile, and there is a minimum value in the middle of the soil profile (marked by the dotted box), which is the intermediate stable layer of soil moisture content.

[0028] Preferably, step S4 comprises: When the measured data set includes both the measured data set in the precipitation period and the measured data set in the drought period, the soil depth of the middle stable layer of the soil moisture content of the monitoring profile in the precipitation period and the soil depth of the middle stable layer of the soil moisture content of the monitoring profile in the drought period are determined; Determine the overlapping part of the soil depth of the middle stable layer of soil moisture content in the precipitation period of the monitoring profile and the soil depth of the middle stable layer of soil moisture content in the drought period of the monitoring profile; The soil depth of the overlapping part is determined as the middle stable layer of soil moisture content in the monitoring profile; When the measured data set only has a measured data set during the precipitation period, the soil moisture content intermediate stable layer measured according to the measured data set during the precipitation period is determined as the soil moisture content intermediate stable layer of the monitoring section; When the measured data set only has the drought period measured data set, the soil moisture content intermediate stable layer measured according to the drought period measured data set is determined as the soil moisture content intermediate stable layer of the monitoring section.

[0029] The present invention also provides a device for identifying an intermediate stable layer of soil moisture content, which is used to implement the above method embodiment. Figure 2 1 is a schematic diagram of a structure provided by an embodiment of a device for identifying an intermediate stable layer of soil moisture content according to the present invention. Figure 2 As shown, including: Data acquisition module 1, used to obtain the measured data set of soil moisture content of the monitoring profile; The data preprocessing module 2 is used to preprocess the measured data set and divide the measured data set according to meteorological conditions; wherein the divided measured data set includes at least one of a precipitation period measured data set and a drought period measured data set; A subset soil moisture content intermediate stable layer determination module 3 is used to determine the soil moisture content intermediate stable layer of all divided measured data sets; The soil moisture intermediate stable layer determination module 4 is used to determine the soil moisture intermediate stable layer of the monitoring section according to the soil moisture intermediate stable layers of all divided measured data sets.

[0030] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0031] The present invention also provides a device for identifying an intermediate stable layer of soil moisture content, which is used to implement the above method embodiment. Figure 3 1 is a schematic diagram of a structure of an embodiment of a device for identifying an intermediate stable layer of soil moisture content according to the present invention. Figure 3 As shown, a device for identifying an intermediate stable layer of soil moisture content in this embodiment includes a processor 21 and a memory 22, and the processor 21 is connected to the memory 22. The processor 21 is used to call and execute the program stored in the memory 22; the memory 22 is used to store the program, and the program is at least used to execute a method for identifying an intermediate stable layer of soil moisture content in the above embodiment.

[0032] The specific implementation scheme of the device for identifying the intermediate stable layer of soil moisture content provided in the embodiment of the present application can refer to the implementation scheme of the method for identifying the intermediate stable layer of soil moisture content in any of the above embodiments, which will not be repeated here.

[0033] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0034] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0035] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0036] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0037] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0038] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0039] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for identifying an intermediate stable layer of soil moisture content, characterized in that: include: Obtain the measured data set of soil moisture content in the monitoring profile; Preprocessing the measured data set, and dividing the measured data set according to meteorological conditions; wherein the divided measured data set includes at least one of a precipitation period measured data set and a drought period measured data set; Determine the middle stable layer of soil moisture content of all the divided measured data sets; The soil moisture intermediate stable layer of the monitoring section is determined according to the soil moisture intermediate stable layer of all the divided measured data sets.

2. The method according to claim 1, characterized in that The step of obtaining a measured data set of soil moisture content of the monitoring section includes: Determine at least 3 monitoring points of the monitoring section; Obtain continuous time series samples of the measured data set of soil moisture content at each monitoring point; wherein the time span of the measured data set of each monitoring point is at least 1 day, the amount of data per day is at least 12, and the meteorological conditions at the time of collection include at least one of a rainfall scenario and a drought scenario.

3. The method according to claim 2, characterized in that The preprocessing of the measured data set and dividing the measured data set according to meteorological conditions includes: The measured data set is divided by monitoring data statistical methods and according to the meteorological conditions when the data are collected.

4. The method according to claim 3, characterized in that Determining the middle stable layer of soil moisture content of the measured data set during the precipitation period, including: Determine the moisture content of soil at each depth at the initial moment of the rainfall scenario according to the measured data set during the rainfall period; The moment when soil moisture content rises by 10% after precipitation is defined as the soil moisture response point, and the response time of each soil depth is determined; According to the response time of each soil depth, the intermediate stable layer of soil moisture content in the precipitation period of the monitoring profile is determined.

5. The method according to claim 4, characterized in that Determining the middle stable layer of soil moisture content of the drought period measured data set, including: Performing fast Fourier transform on the drought period measured data set to obtain power spectrum density of different frequencies; According to the power spectrum density of the different frequencies, the variation pattern of the drought period measured data set over time is converted into a frequency feature; Monitor the power spectrum density of soil at different depths with a preset time period; According to the power spectrum density of the soil at different depths, the intermediate stable layer of soil moisture content in the monitoring section during the drought period is determined.

6. The method according to claim 5, characterized in that The step of determining the intermediate stable layer of soil moisture content of the monitoring section according to the intermediate stable layer of soil moisture content of all the divided measured data sets includes: When the measured data set includes both the measured data set in the precipitation period and the measured data set in the drought period, determining the soil depth of the intermediate stable layer of soil moisture content in the monitoring section in the precipitation period and the soil depth of the intermediate stable layer of soil moisture content in the monitoring section in the drought period; Determine the overlapping part of the soil depth of the intermediate stable layer of soil moisture content in the monitoring section during the precipitation period and the soil depth of the intermediate stable layer of soil moisture content in the monitoring section during the drought period; Determine the soil depth of the overlapping portion as the middle stable layer of soil moisture content of the monitoring section; When the measured data set only has a measured data set during the precipitation period, the soil moisture content intermediate stable layer measured according to the measured data set during the precipitation period is determined as the soil moisture content intermediate stable layer of the monitoring section; When the measured data set only has the drought period measured data set, the soil moisture content intermediate stable layer measured according to the drought period measured data set is determined as the soil moisture content intermediate stable layer of the monitoring section.

7. A device for identifying the intermediate stable layer of soil moisture content, characterized in that: include: A data acquisition module is used to obtain a measured data set of soil moisture content in the monitoring profile; A data preprocessing module, used to preprocess the measured data set and divide the measured data set according to meteorological conditions; wherein the divided measured data set includes at least one of a precipitation period measured data set and a drought period measured data set; A subset soil moisture content intermediate stable layer determination module is used to determine the soil moisture content intermediate stable layer of all the divided measured data sets; The soil moisture intermediate stable layer determination module is used to determine the soil moisture intermediate stable layer of the monitoring section according to the soil moisture intermediate stable layers of all the divided measured data sets.

8. A device for identifying the intermediate stable layer of soil moisture content, characterized in that: The invention comprises a processor and a memory, wherein the processor is connected to the memory: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store the program, and the program is at least used to execute the method for identifying the intermediate stable layer of soil moisture content as described in any one of claims 1-6.

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