Device and method for tracking frozen soil active layer water movement and underground ice freeze-thaw process

Abstract

The invention discloses a device and a method for tracking frozen soil active layer water movement and underground ice freeze-thaw process. The tracking device comprises a precipitation tracer releasing device, an active layer water and underground ice freeze-thaw simulating device, and a drainage collecting device. The precipitation tracer releasing device is used for mixing a man-made tracer with natural water body to label water and form rain intensity controllable simulated precipitation; the active layer water and underground ice freeze-thaw simulating device contains test soil and is used for monitoring soil temperature and soil water content in real time; and the drainage collecting device is used for collecting the produced water. The device and the method disclosed by the invention can directly observe the active layer water and underground ice in every space of the test soil at different time periods of precipitation runoff generation, underground ice development, underground ice thawing, and so on, can automatically monitor ground temperature and soil water content, and can conveniently and rapidly collect underground ice and soil water samples in every space in the freeze-thaw process. The solute and isotopic tracer technique has strong physical basis, and can improve observation efficiency.

Description

technical field [0001] The invention belongs to the technical field of hydrological experiments, and in particular relates to a tracer device and an implementation method for monitoring water movement in active layers of frozen soil and underground freezing and thawing processes. Background technique [0002] With global warming, the cryosphere and the ecological environment it affects are facing enormous challenges. The hydrophysical processes in permafrost regions are changing, and they will face problems such as water changes in the active layer of permafrost and melting of underground ice. The problem of sharp decline is becoming more and more prominent. [0003] The research on permafrost degradation and its hydrological effects has attracted more and more attention. Relevant international studies have shown that under the background of permafrost degradation, the base flow of rivers in winter and runoff in warm seasons increase significantly, and attribute this to the...

AI Technical Summary

Problems solved by technology

[0006] In the existing technology, there are many instruments and experimental methods artificially developed in humid areas to simulate precipitation, soil water movement and other hydrological aspects, but they are all limited to intuitive and perceptual understanding. Generally, precipitation is expressed through manual observation and water weighing changes Runoff and soil water movement, lack of in-depth excavation of the physical mechanism of runoff and soil water migration

At present, there is no simulation experiment device suitable for the active layer water and the underground freeze-thaw process in the actual permafrost region, especially the experimental methods involving the use of solutes, isotopes and other geochemical methods to trace precipitation runoff and underground freeze-thaw, which are still limited. blank

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