乌珠穆沁沙地主要风沙环境特征及形成机制研究

Mastering the regional wind sand movement environment and sediment particle size characteristics isthe key to studying wind sand flow, and is of great significance for the prevention and recovery of regional windsand disasters. Based on the wind regime data of Wuzhumuqin Sandy Land, this paper studies the variationcharacteristics of sand driving wind regime and sand transport potential, and reveals the spatial differences ofsand environment in this area by combining with the sediment particle size data. The results show that:1Theannual average frequency of sand blowing in the Wuzhumuqin sandy land is 33.8%, with an average wind speedof 3.34-5.40 ms-1, and an average sand blowing wind speed of 6.46-8.49 ms-1. The frequency and wind speedof sand blowing in the north of the sandy land are greater than those in the south, and those in the west are greaterthan those in the east.2The overall annual frequency and wind speed of sand storms are the highest in spring.The wind direction of sand storms is mainly in the southwest direction, and the frequency in the WSW directionis the highest. 3The sand transport potential in the sandy land is 19.2-193.7 VU, which is generally a low windenergy environment. The wind conditions are mostly sharp bimodal wind conditions. The sand transport potentialin the north of the sandy land is greater than that in the south, and that in the west is greater than that in the east.Throughout the year, sand material is transported to the east and northeast, and spring is the most importantperiod of wind sand activity.4The sandy land is mainly composed of coarse and medium sand components,with soil particle sizes in the south and west being coarser and finer in the east. The sorting of sediment in thenorthern and eastern parts of the sandy land is poor, and the particle size components are greatly influenced byexternal factors. Overall, the sandstorm activity in the northern part of the sandy land is the strongest, making itsuitable for artificial planting or laying sand barriers to fix sand. Protection forest is planted in the east of thesandy land to avoid the continuous eastward movement of sand.