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Method for detecting soil-wetted body in drip irrigation mode

A soil and box method technology, applied in the field of soil detection, can solve the problems of destroying the original state and space of the wet body, difficult continuous measurement, and unable to reflect the morphological characteristics of the soil wet body well.

Inactive Publication Date: 2018-02-23
SHANDONG AGRICULTURAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the research on the morphological characteristics of soil wet body mostly adopts methods such as excavation section method, transparent device observation method and numerical model method. The excavation section has the disadvantages of destroying the original shape and space of the wet body, and continuous measurement is difficult. The numerical model calculation is only suitable for Ideal conditions are not suitable for complex and changeable real conditions. The soil moisture will flow along the box wall with the transparent device observation method, which cannot well reflect the morphological characteristics of the soil moist body in the natural state.

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  • Method for detecting soil-wetted body in drip irrigation mode
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  • Method for detecting soil-wetted body in drip irrigation mode

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Embodiment 1

[0083] The present invention provides a method for detecting soil moist bodies under drip irrigation. The method of this embodiment is implemented on the wet bodies formed after clay irrigation, which is carried out indoors. The specific operation steps are as follows:

[0084] (1) Experimental materials: soil and water

[0085] The soil used in the experiment is taken from the clean soil with no pollution in the surface layer of 0-20cm. After natural air drying, the volume water content is measured to be 2.03%, and then passed through a 2mm sieve to measure the soil properties. (<0.002mm), powder (0.02-0.002mm), sand (2-0.02mm)) proportion indicates that the experimental water is ordinary deionized water.

[0086] The properties of soil used in this embodiment are shown in Table 4 below:

[0087] Table 4: Soil Properties

[0088] Tab.4 Soil Properties

[0089]

[0090] (2) Ground Penetrating Radar

[0091] The LTD-2100 ground penetrating radar system produced by the Ch...

Embodiment 2

[0118] The present invention provides a detection method of soil moist body under the drip irrigation method. The method of this embodiment is directly applied to the outdoor field. The specific operation steps are the same as the operation steps of the above-mentioned embodiment 1, except that the detection object and the amount of irrigation water are changed.

[0119] The experimental site of this embodiment is located in the farm of Shandong Agricultural University (South Campus), without weeds. This experiment mainly detects the range of GPR detection of soil moist body and the characteristics of radar images in field practice. The design test is as follows:

[0120] Design five wet bodies, the irrigation volumes are 500ml, 1000ml, 1500ml, 2000ml, 2500ml respectively, and the interval of irrigation points is 1m, such as Figure 13 shown. After 2 hours of standing still after irrigation, the soil water no longer diffuses and is in a stable state. GPR data collection is ca...

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Abstract

The invention provides a method for detecting a soil-wetted body in a drip irrigation mode. The method comprises the following steps of collecting and processing GPR data, measuring the soil volume water content, establishing a relation model between the soil volume water content and the dielectric constant, and interpreting the processed GPR data. According to the invention, the established relation model between the soil volume water content and the dielectric constant is more accurate compared with a traditional Ttop model. The method provided by the invention is used for carrying out original detection on the premise that the soil-wetted body is not damaged at all. The change of the time scale and the spatial scale of the soil-wetted body is fully considered, so that the soil-wetted body can be rapidly and efficiently detected in the nondestructive and in-situ manner based on the ground penetrating radar technology. The application of the ground penetrating radar technology in thesoil-wetted body monitoring field is promoted. Meanwhile, the technical support is provided for the accurate agriculture and the water-saving agriculture.

Description

technical field [0001] The invention relates to the technical field of soil detection, in particular to a method for detecting a soil wet body, in particular to a method for detecting a soil wet body in a drip irrigation mode. Background technique [0002] The acquisition of relevant parameters of the soil moist body is an important research content in water-saving irrigation management. The wet body is the wet area of ​​water in the soil medium under the condition of drip irrigation. The position, size and shape of the soil wet body are very important to the growth of crops. The core of soil water movement and distribution, the study of the eigenvalues ​​of the wet body is the premise and basis for the study of the law of water movement and distribution characteristics under drip irrigation and the correct design of drip irrigation systems and high-level field crop water management. The shape and size of the wetted body below the discharge source are the most influential va...

Claims

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Application Information

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IPC IPC(8): G01B15/02G01S13/89
CPCG01B15/02G01S13/89
Inventor 高鹏王瑞燕尹涛丁丽华
Owner SHANDONG AGRICULTURAL UNIVERSITY
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