Abstract:

Bayinwenduer Desert is a low mountain hilly basin desert in the east of Alxa Plateau， consisting of independent and intermittent distribution of Boketai Desert， Haili Desert and Baiyinchagan Desert. In this paper， the data of wind speed and wind direction from 2016 to 2020 were used to analyze the change characteristics of sand-moving wind and the drift potential in this area. The results show that there was little difference in the annual wind speed between 2016 and 2020， the annual average wind speed was 6.12 m·s^-1， and the annual average sand-moving wind speed was 9.33 m·s^-1. The wind speed changed significantly between months， which showed a significant trend of double differentiation in spring and summer， and the frequency of wind in spring was the highest （up to 67.77%）. The dominant wind in this area was WSW direction， and the annual average of drift potential was 359.99 VU， and the average resultant sand transporting potential was 204.46 VU， and the average directional variation index was 0.55. In the whole study area， there was a middle wind energy environment， a moderate wind direction variation， a blunt double peak or sharp double peak wind condition. There was a big difference in seasonal drift potential， with the largest in winter （453.72 VU）， and the smallest in summer （287.74 VU）. According to the analysis of wind conditions and drift potential， it is suggested to carry out long-term observation of sand flow in this area， and provide scientific basis for the prevention and control of sandstorm disasters in Bayinwenduer Desert from the wind energy environment and the sand activities.

Key words: sand-moving wind, wind condition, drift potential, Bayinwenduer Desert