摘要
沙尘天气过程中,利用BSNE集沙仪收集了肖塘地区荒漠过渡带不同下垫面的近地表沙样,采用英国MALVERN公司Mastersizer2000型激光粒度分析仪对收集到的沙样经过粒度测量.结果表明:(1)荒漠过渡带不同下垫面1m高度内输沙量的含量受下垫面性质和近地层沉积物粒度特征的影响,输沙量的对数与高度呈线性相关;(2)沙样粒度组份以极细沙、细沙和粗粉砂为主,>1mm的沙粒出现在0.2m以下;(3)输沙沙样的平均粒径值主要集中于2φ~5φ,且随高度增加而减小;标准偏差(σ1)的取值范围在0.85~1.71之间,偏度(SK1)呈正偏和极正偏,峰度(KG)值分布在1.19~1.81,属于尖锐型和很尖锐型.上述研究结果可为有效抑制沙漠入侵绿洲,共同维护区域生态环境的稳定起到重要支撑.
In a dusty weather process, the near-surface sand samples with different underlying surfaces in the des- ert transition zone of the Xia0Tang area are collected by BSNE sandstorming. Using the MALVERN company Master- sizer2000 laser particle size analyzer to collect the sand samples through the particle size measurement, the results are as follows ： （ 1 ）The desert transition zone in different underlying surface height lm sediment is affected by the underlying surface and the surface layer of sediments and log sediment with highly linear correlation ; （2）The sand sample size component with very fine sand, fine sand and coarse silt, sand 〉 1 mm occurs below 0.2m; （3）The average particle size of the sample trees lose value mainly in 2 - 5 Phi Phi, and along with the increase of the height decreases ; the standard deviation （1 sigma） range from 0.85 to 1.71 between the skewness （SK1）positive skewness and kurtosis is very partial, （KG） values ranged from 1. 19 to 1.81, which belongs to the type and sharp type. These results can play an important role in effectively restraining the oasis of desert invasion and maintaining the stability of regional ecological environment.
作者
康永德
杨兴华
霍文
杨帆
何清
艾力.买买提明
Kang Yong-de Yang Xing-hua Huo Wen Yang Fan He Qing Ali-Maimaitimin(China Meteorological Administration Urumqi Institute of Desert Meteorology, Urumqi Xinjiang 830002 Taklimakan Desert Atmospheric Environment Research Station, Tazhong Xinjiang 841000)
出处
《河西学院学报》
2017年第5期46-51,共6页
Journal of Hexi University
基金
国家自然科学基金"风沙两相流精细化观测与模拟研究"(项目编号:41375163)
关键词
荒漠过渡带
下垫面
粒度
沙尘暴
Desert transition zone
Underlying surface
Grain size
Sand storm
