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A soil profile moisture dynamic in-situ monitoring system and measurement method

A technology of soil profile and measurement method, which is applied in the field of soil profile moisture dynamic in-situ monitoring system and measurement, which can solve the problems of in-situ dynamic monitoring of soil profile moisture and high cost, and achieve easy popularization and use, low equipment price and simple operation Effect

Inactive Publication Date: 2014-10-08
LUDONG UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention mainly solves the problems that the existing method for measuring soil moisture cannot carry out in-situ dynamic monitoring of soil profile moisture and the high cost limits its wide-ranging application, etc.

Method used

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  • A soil profile moisture dynamic in-situ monitoring system and measurement method

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0026] Embodiment 2 differs from Embodiment 1 in that the outer surface of the probe 2 is coated with a polymer hydrophobic gas-conducting membrane 9 .

Embodiment 3

[0027] Embodiment 3, using the monitoring system of Embodiment 1 or 2, realizing the dynamic in-situ measurement method of soil profile moisture, the steps are:

[0028] (1) According to the purpose of measurement or research, select a soil to be tested, bury a probe tube of a certain length and specification in the soil, keep the probe tube 10-15cm above the soil, and ensure that the probe tube is in close contact with the soil without gaps;

[0029] (2) Use drying weighing or other soil moisture measurement methods to measure the average moisture content of the soil in the area where the probe is located;

[0030] (3) Reuse the gas supply source to ventilate the probe tube, and measure the stable air flow rate that penetrates outward through the vent hole under different stable gas supply pressures △P , calculated according to The ratio is used as the gas conduction characteristic parameter;

[0031] (4) Repeat steps (2) and (3) under various moisture conditions to obtai...

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Abstract

The invention discloses a dynamic in-situ monitoring system and a measuring method for soil profile moisture. The method is characterized by comprising the following steps of: providing steady air flow with a certain pressure and flow for a probe provided with a vent hole and buried in soil by utilizing an air supply source; respectively measuring the flow of steady gas which permeates the vent hole of the probe and the stable pressure in a measuring pipe by utilizing a flowmeter and a barometer, calculating corresponding gas-guide characteristic parameters, establishing a quantitative relationship between the gas-guide characteristic parameters and the soil moisture, and obtaining a soil profile moisture measuring model based on a steady-state soil gas-guide characteristic parameters so as to monitor the dynamic change of moisture content in profile soil body to be measured. The method can be technically implemented, the cost of the equipment is greatly reduced, and the method is easy to operate and easy to popularize and use.

Description

Technical field: [0001] The invention relates to the technical field of soil moisture parameter measurement, in particular to a soil profile moisture dynamic in-situ monitoring system and measurement method. Background technique: [0002] Soil water is an important part of water resources and an important parameter in the research of hydrology, agriculture, meteorology, and land-atmosphere energy exchange. As an important physical parameter of soil, soil water content is an indispensable basic data in scientific researches such as water cycle, plant growth, and soil carrying capacity. The monitoring of soil moisture status has been paid attention to by researchers in agriculture, forestry, water conservancy and other disciplines. At present, the methods for measuring soil moisture include drying weighing method, tensiometer method, electrical resistance method, neutron meter method and time domain reflectometry (TDR) method, etc. [0003] Drying weighing method is the most...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 张振华牛文全杨润亚李陆生潘英华
Owner LUDONG UNIVERSITY
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