**5. Conclusion**


of a power function. The wind direction was mainly W, WNW and NE, but the proportion of each direction was different inside and outside shelterbelt.

3. The horizontal aeolian sediment flux decreased significantly with the increase of height outside shelterbelt, while increased slowly with the increase of height inside shelterbelt. The aeolian deposition flux decreased significantly with the increase of height which was expressed as a power function relationship. Wind speed was significantly weakened, the horizontal and vertical fluxes of aeolian sediment flux were reduced when sandstorm passed through oasis shelterbelts.
