Method and system for measuring soil infiltration capability

Abstract

The invention discloses a method for measuring soil infiltration capability, which comprises the following steps of: S1, acquiring an earth surface image of each frame with a camera; S2, extracting an earth surface humid area in the image acquired by the S1; S3, calculating the area of the earth surface humid area extracted by the S2; S4, correcting the earth surface humid area acquired by the S3; and S5, calculating the soil infiltration capability through the corrected earth surface humid area. The method has the advantages of less water requirement and high precision in the process of measuring, and wide popularization and application value, and can provide an effective, time-saving, labor-saving and precise tool for research on the measurement of the soil infiltration capability, and research in the related aspects such as earth surface runoff formation and soil erosion and the like.

Description

technical field [0001] The invention relates to the field of hydrological research, in particular to an automatic measurement method and an automatic measurement system for soil infiltration performance. Background technique [0002] The soil infiltration process describes the process of water infiltration into the soil, and is an important link in the hydrological process connecting surface water and soil water. The parameters to measure soil infiltration performance are soil infiltration rate and cumulative soil infiltration. Soil infiltration rate is defined as the amount of water infiltrated into a unit area per unit time, and the unit is mm / h or cm / h. Cumulative infiltration is defined as the total amount of water infiltrated into a unit area within a period of time, and the unit is mm or cm. The quantitative relationship between infiltration rate and cumulative infiltration is: [0003] i = dI dt - ...

AI Technical Summary

Problems solved by technology

In the double-ring method and artificial rainfall method, the rapid wetting of the surface leads to the formation of surface crusts, which greatly reduces the infiltration performance of the soil (Levy et.al., 1997; Mamedov et.al., 2001)

This affects the measurement accuracy of soil infiltration rate to a certain extent.

The double-ring method cannot be applied to slopes, which limits the application of this method in the field

Due to the limitation of rainfall intensity, the initial high infiltration performance of soil cannot be observed in artificial rainfall simulation method

Therefore, neither the double-ring method nor the artificial rainfall method can measure the initial high infiltration performance of the soil, and these two methods cannot measure the complete soil infiltration performance process line

There are problems such as side seepage in the disc infiltrator test, which affects the measurement accuracy of the method

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