Dust particles generated by soil wind erosion have seriously affected the air environment quality.To explore the dust emission law,it is necessary to study the mutual mechanism of wind speed and friction wind speed at different heights on dust emission flux.In the case of only observed data,it was necessary to study the dust release caused by soil wind erosion by simulation.In this paper,the variation of wind speed at different altitudes in Taklimakan Desert and the average friction wind speed were analyzed,and the dust release flux was calculated by DPM model.The relationship between the average friction wind speed and the dust release flux was comprehensively analyzed.The results showed that:(1)The variation of wind speed at different altitudes was different in different observation days.The variation range of wind speed at 2 m height was 0.05-7.73 m·s-1,the variation range of wind speed at 4 m height was 0.09-7.19 m·s-1,and the variation range of wind speed at 10 m height was 0.5-8.09 m·s-1.(2)From April 1st to April 30th,the average friction wind speed within 24 hours of each observation day was 0.42,0.34,0.27,0.34,0.16 and 0.32 m·s-1,respectively,and its variation range was 0.16-0.42 m·s-1;(3)The measured jump flux was about 129%of the simulated value,and the correlation between the simulated value and the measured value was good,with the quadratic coefficient of 0.91.
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