巴丹吉林沙漠拐子湖地区贴地层风速廓线和风沙流结构特征

野外监测试验表明：自由风和风沙流廓线拟合虽都以Z=A·exp(-X/T)+Z₁形式分布，但在风沙流中拟合系数更高；风沙流结构中，在20 cm以下随着高度的增加，各高度的输沙率百分比、含沙浓度、运动颗粒能量都呈增大趋势；20 cm以上随高度增加，各高度输沙率百分比变小，输沙率占总输沙率的51%左右，含沙量主要集中在离地面20 cm以内；风沙流在垂直方向上，高度与含沙平均粒径呈负相关，风速与含沙平均粒径变化呈正相关。这些结论对拐子湖地区防风治沙有重要的指导意义。

Research on Wind Profile and Sand Drift Structure in Guaizi Lake Region in the Badain Jaran Desert

A field monitoring test was carried out in Guaizi Lake region in the Badain Jaran Desert so as to study the wind profile and sand drift structure in the region.The Analyzed results reveal that both free wind and sand drift profile can be scattered by Z=A·exp(-X/T)+Z1,but the fitted coefficient of sand drift was higher.In the sand drift structure,the percentage of sand transport rate,sand concentration and energy of moving particles were all in an increase trend with the increase of height below 20 cm from the ground.The percentage of sand transport rate at all the heights was decreased with the increase of height above 20 cm,the proportion of sand transport rate was about 51% of the total,and sand drift occurred mainly in an air layer below 20 cm from the ground.Vertically,there was a negative correlation between average particle size and height,but a positive one between average particle size and wind velocity.These conclusions are of great guiding importance for constructing windbreak against sand drift in the Guaizi Lake region.