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On the basis of blown sand observation of dunes,sandland and loess liang in hinterland of Mu Us sandland,wind profile and sand-blowing density are analyzed.Transport rate,sand flow structure and roughness are used to study sand-blowing density.The research indicates that wind velocity profile of flat drifting sand area follow semilogarithm rule while others violates the rule fiercer as vegetaion coverage increase.Sand-blowing density decreases as vegetaion rate increase,increase as wind-velocity increase.