Circular disc type nonsaturated soil moisture diffusion instrument

A soil moisture, disk-type technology, applied in soil science, soil mechanics and soil and water conservation research fields, can solve the problems of complex calculation process, time-consuming, laborious and other problems, achieve small water inlet area, less water inflow, improve The effect of measuring accuracy

Inactive Publication Date: 2008-09-17
NORTHWEST A & F UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods have shortcomings such as time-consuming, laborious, and...

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  • Circular disc type nonsaturated soil moisture diffusion instrument
  • Circular disc type nonsaturated soil moisture diffusion instrument
  • Circular disc type nonsaturated soil moisture diffusion instrument

Examples

Experimental program
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Embodiment Construction

[0018] see figure 1 , the disc type unsaturated soil moisture diffusion instrument of the present invention is made up of two parts of water supplier and soil moisture diffusion disc, wherein:

[0019] The water supply device adopts a plexiglass tube, which is used to provide a water source with a constant water head to the soil disc by using the principle of the Martens bottle, and is used to provide moisture to the soil sample in the disc. The supplier is a plexiglass tube that can hold water 1 , there is a water inlet on the top of the organic glass tube 1, and there is a water outlet at the lower end of the side wall of the organic glass tube 1. The water outlet is equipped with a rotary valve to control water flow and stop water, and maintain a constant water head by applying the principle of the Martens bottle;

[0020] The soil diffusion disc 2 has a height of 12 cm and is composed of 3 concentric circles with radii of 5 cm, 10 cm and 60 cm respectively. There is a wat...

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Abstract

The invention discloses a disk type unsaturated soil moisture diffusing device, comprising moisture supplying device and soil moisture diffusing disk, wherein the moisture supplying device supplies moisture for the soil in the disk and is a lucite tube provided with a water intake on the top of the lucite tube and a water outlet at the inferior end of the side wall of the lucite tube and the water outlet is provided with a rotary valve. The moisture supplying device provides water supply with constant head based on Mariotte bottle principle and is connected with the soil moisture diffusing disk by a rubber hose. The soil moisture diffusing disk comprises three concentric circles and is divided into water chamber, filtering layer and sample laying area from the inside to the outside, wherein the circular side wall between each parts is overspreaded with cribriform pores to make the moisture freely pass through, The disk type unsaturated soil moisture diffusing device can measure a plurality of samples at the same time and the measurement result has consistency with the traditional method (horizontal earth column diffusion method).

Description

technical field [0001] The invention belongs to the research fields of soil science, soil mechanics and soil and water conservation, and relates to a method and a device for measuring the unsaturated moisture diffusivity of soil, in particular to a disc type unsaturated soil moisture diffusivity instrument which can simultaneously measure a plurality of soils. Background technique [0002] 40% of the world's land area is located in arid and semi-arid regions. Water shortages restrict the development of industry and agriculture in these regions and cause many ecological problems. Soil moisture not only provides the water needed for plant growth, but also acts as a carrier for transporting various nutrients. It plays a key role in the construction and succession of vegetation ecosystems. Therefore, revealing the characteristics of soil moisture movement and rationally regulating soil moisture status are important. The foundation of agricultural production and ecological enviro...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N13/04
Inventor 黄明斌赵爱辉
Owner NORTHWEST A & F UNIV
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