Undisturbed soil fetcher and soil infiltration performance measurement method

Abstract

The invention relates to the technical field of soil infiltration performance measurement, in particular to an undisturbed soil fetcher and a method for measuring soil infiltration performance. The first end of the soil-absorbing pipe is provided with a cutting edge, and the first soil-absorbing pipe positioning ring is arranged in the soil-absorbing pipe protection sleeve; The soil-taking pipe is positioned on the annulus; the soil-taking pipe is used to be placed in the protective casing of the soil-taking pipe; the soil-taking pipe is made of transparent material; the side of the soil-taking pipe is provided with a water inlet, which is used to connect with the water inlet pipe of the water supply device, and the water inlet With seals. The undisturbed soil fetcher of the present invention can not only accurately collect the undisturbed soil in the field, but also can directly use the undisturbed soil in the measurement of undisturbed soil infiltration characteristics, observation of wetting front, measurement of preferential infiltration and observation of preferential flow channels.

Description

technical field [0001] The invention relates to the technical field of soil infiltration performance measurement, in particular to an undisturbed soil fetcher and a soil infiltration performance measurement method. Background technique [0002] At present, the methods of collecting undisturbed soil mainly include the ring knife method and the undisturbed soil-taking tube method. The ring-knife method has disadvantages such as complicated operation and high labor intensity in the soil extraction process; compared with the ring-knife method, the original soil extraction tube method can take soil samples from multiple soil layers at a time, and the soil extraction efficiency is higher, but the soil samples are pushed out. Difficult and low accuracy of soil sample separation. Using the above two methods to collect undisturbed soil can accurately measure soil bulk density and soil moisture content, but it cannot be used to measure the change process of soil infiltration performa...

AI Technical Summary

Problems solved by technology

Usually the soil infiltration performance test is mainly carried out indoors and in the field. In the indoor test, the sieved soil is used to remove debris such as stones and weeds. The uniformity of the soil is good, but due to the change of the original state of the soil, the measurement results cannot be measured. It truly reflects the soil infiltration performance of undisturbed soil; field tests mainly use soil infiltration performance measurement devices, such as disc infiltrators, double-ring infiltrators, and artificial simulated rainfall. Difficult to measure deep soil infiltration properties

The artificially simulated rainfall process is easily affected by natural wind speed, temperature changes, etc., and there are certain errors in the measurement results, and it is impossible to obtain high initial infiltration performance

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