Apparatus and method for measuring line source inflow of soil infiltration performance

Abstract

The invention discloses an apparatus and method for measuring the line source flow of the soil soaking-in function. The apparatus comprises a constant water-providing tank, a water-distributing device, a soil groove, a rule and an image device. The method comprises the following steps: 1) sieving the air-dry soil and measuring the initial water ratio of the soil sample; 2) putting the soil sample in the soil groove; 3) adjusting the soil groove to the given height altitude; 4) putting the water distributing device on the soil surface of the soil groove to distribute the water; 5) recording the earth advancing area at different times by the image device; 6) recording the providing water and the soil dewing area image every section of time; 7) obtaining the corresponding dewing area by computing the image sheet; 8) obtaining the soil soaking-in ratio in different times by the computing formula.

Description

technical field [0001] The invention relates to a device and method for measuring soil infiltration performance, in particular to a line source inflow measurement device and method for soil infiltration performance. Background technique [0002] Soil moisture infiltration refers to the process of water entering the soil and is an important part of the field water cycle. Soil infiltration is important in practice, as it determines how quickly rainwater or irrigation water can enter the soil, as well as the amount of runoff from the soil surface and the risk of soil erosion during heavy rainfall. If the soil infiltration performance is small, the water budget of the plant root layer will be affected. To manage the moisture status of field soil, the quantitative relationship between soil infiltration performance and soil properties is very important. [0003] The infiltration capacity of soil to water is often measured by infiltration rate, and sometimes by cumulative infiltr...

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Problems solved by technology

But the deficiency of above-mentioned method is: can not be used for sloping land; When double-ring enters soil, soil structure is destroyed, especially topsoil is destroyed, and at the beginning of test, when adding water in double-ring, easily destroys topsoil structure, has changed the property of soil, The measured infiltration performance cannot truly reflect the properties of the measured soil; at the same time, the double-ring infiltration is pressurized infiltration; in the initial stage, due to the limitation of the water flow capacity of the water supply orifice, it cannot meet the requirements of sufficient water supply, and it is inconvenient to quantitatively study the soil. initial infiltration process

However, the disadvantages of this method are: the initial high infiltration capacity of the soil cannot be measured due to insufficient water supply; when the rain is strong, it will destroy the soil structure

And because the initial infiltration rate of the soil is very large, the simulated rainfall method is also impossible to achieve sufficient water supply, so the initial infiltration performance of the soil cannot be measured.

Moreover, according to relevant experiments, the amount of water required during the experiment generally exceeds 2500L, which is a large amount of water.

[0010] Other known methods, such as the Mario-double-ring method, are improvements of the double-ring method. Although the accuracy has been improved compared with the double-ring method, the device is more complicated, so its application, especially in the field, still has limitations.

[0011] To sum up, the known prior art has the disadvantages of complicated devices, too much water consumption for the experiment, and a long duration, which make these methods have great limitations in the practical application in the field.

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