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- W314774940 abstract "Gurbantunggut Desert is the second biggest desert in China with area of 48.8×103 km2.Annual precipitation is about 90-150 mm,and 25% of it is the snowfall.The average air temperature is 6.6℃,and the lowest air temperature is-41.5 ℃.There are 4 months snow cover periods.The snow depth is about 20-30 cm in general.Soil moisture condition is the primary factor that affects desert vegetation coverage.It is important to understand the infiltration processes during snowmelt.Based on the soil infiltration experiments under frozen and unfrozen conditions in the southern margin of Gurbantunggut Desert,the water infiltration characteristics for seasonal frozen aeolian sandy soil and the main factors which influence the infiltration process are analyzed.The georgaphical coordinate of experimental site is 44°22′N and 87°55′E.The double ring infiltrator are used for measuring the infiltration rate.Results indicated that infiltration rate into seasonal frozen soil decreases along with increasing initial soil moisture content.The stable infiltration rates of frozen aeolian sandy soil in Gurbantunggut Desert are about 0.26-0.30 mm/min which are about 1/10 of unfrozen soil,but which are still 10-20 times of frozen loamy soil in farmland.Higher infiltration rate of frozen sandy soils ensure the snowmelt infiltration into soil layer rapidly and provide advantage condition for effective storage of snowmelt water.There is 92.1% of the snowfall water infiltrated into soils.The low initial soil moisture content and macropores texture are the major reasons for higher infiltration rate of frozen sandy soils.Rotten root pathways and thermal contraction cracks are also the reasons to influence the ability of water infiltration into frozen soil.The results provide a basis data for further study on infiltration of snowmelt into frozen soil and redistribution of snowmelt water in Gurbantunggut Desert." @default.
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- W314774940 date "2009-01-01" @default.
- W314774940 modified "2023-09-24" @default.
- W314774940 title "Experimental study on infiltration characteristics of seasonal frozen soils in Gurbantunggut Desert." @default.
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