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| DOI：10.13522/j.cnki.ggps.20190279 |
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| Study on the Hydrothermal Mechanism of Seasonal Frozen Soil——A Case Study about the Southern Margin of the Gurbantunggut Desert |
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CHEN Xiaomeng, WEN Fang, GU Zongbin, ZI Yeerdie, LIAO Na
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1. Xinjiang Academy of Environmental Protection Science, Urumqi 830011, China;2. Xinjiang Engineering Technology Research Center for Cleaner Production, Urumqi 830011, China; 3. Xinjiang Academy of Environmental Protection Science, Urumqi 830011, China
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| Abstract: |
| 【Objective】We aim at illustrating the coupling relationship between water and heat in freezing-thawing soil in arid region of Xinjiang, so as to establish a soil hydrothermal coupling model in the process of freezing and thawing.【Method】Based on soil hydrodynamics, frozen soil physics, and statistics, soil temperature and humidity in different depths were measured by measurement system, and the changes of soil temperature and moisture along with time and depth were compared. The law of water and heat transfer in freezing-thawing soil of the ecotone between fine soil plain area and desert in typical arid region of Xinjiang was studied, in addition, the water and heat change characteristics of soils during freezing and thawing period were analyzed.【Result】The variation trends of soil moisture and soil temperature in each layer were basically consistent with the changing trend of environmental temperature in the process of freezing and thawing. However, the variation trend of soil temperature and soil moisture gradually weakened with the increase of soil depth. The soil moisture of deep layers did not change with the increase or decrease of ambient temperature during the freezing-thawing process, while there was a coupling effect between soil temperature and soil moisture in shallow?layers（5 cm and 20 cm）of?soil.【Conclusion】There was a coupling effect between temperature and moisture of seasonal frozen soil. |
| Key words: grey-brown desert soil; seasonal frozen soil; soil moisture; soil temperature; hydrothermal condition; coupling model |
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