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  

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

作　　者：何清[1,2] 胡文峰[1,3] 杨兴华[1,2] 艾力.买买提明 赵聪敏[1,3] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [2]塔克拉玛干沙漠大气环境观测试验站,新疆塔中841000 [3]新疆师范大学地理科学与旅游,新疆乌鲁木齐830054

出　　处：《干旱区研究》2012年第3期517-523,共7页Arid Zone Research

基　　金：国家自然科学基金项目(41175017);国家科技支撑计划课题(2008BAC40B05-01);公益性行业(气象)科研专项(GYHY201006012);中国干旱气象科学研究基金(IAM201013);中国沙漠气象科学研究基金(Sqj2010007)

摘　　要：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。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.

关 键 词：风速廓线 风沙流结构 拐子湖 巴丹吉林沙漠 

分 类 号：P931.3[天文地球—自然地理学]