塔克拉玛干沙漠南缘风沙跃移运动研究——以策勒为例

摘要/Abstract

摘要： 利用Sensit传感器、BSNE集沙仪、全方位跃移集沙仪结合2 m气象塔,于2010年7月5日至8月24日在策勒绿洲-荒漠过渡带开展了风沙跃移运动强化观测试验,分析了该区域风沙跃移运动的部分特征。结果表明:①试验点2 m高度临界跃移起动1 h平均风速为5.0 m·s-1;跃移颗粒数与风速呈现较好的幂函数关系;②跃移输沙量的方向分布以偏西方向为主,主要集中在SW、WSW、W、WNW、NW5个方位,共计占到80.9%;③跃移运动在一日之内的任何时间段都可能发生,发生频率较高的时段集中在白天的11:00—19:00;④观测期间0～40 cm高度范围的跃移输沙通量为199.4 kg·m-1。

关键词: 跃移运动, 起沙风速, 输沙通量, 塔克拉玛干沙漠南缘

Abstract: In order to investigate the characteristics of sand saltation movement in the south margin of the Taklimakan Desert, we select Cele County as an experimental point and develop a extensive sand saltation movement observation experiment from July 5, 2010 to August 24, 2010 by making use of Sensit sensor, BSNE sand sampler, omni-directional sand saltation sampler and 2-m height meteorological tower. Some results are obtained as fol1ows: (1) During the observation period, the threshold hourly mean wind velocity at 2 m height is about 5.0 m·s-1, and there is a significant power function relationship between saltation particles number and wind velocity. (2) The distribution of saltation sand flux is around west direction, concentrating on SW, WSW, W, WNW, and NW directions accounted for 80.9%. (3) Sand saltation movement can occur at any time of a day, with more frequency in the day time between 11:00 and 19:00. (4) The saltation sand flux within 0~40 cm height is 199.4 kg·m-1 during the observation period.

Key words: saltation movement, threshold wind velocity, saltation sand flux, the Taklimakan Desert

中图分类号:

X169

杨兴华, 何清, 霍文, 艾力·买买提明, 刘新春. 塔克拉玛干沙漠南缘风沙跃移运动研究——以策勒为例[J]. 中国沙漠, 2012, 32(4): 910-914.

YANG Xing-hua, HE Qing, HUO Wen, AI Li-·Mai-mai-ti-ming, LIU Xin-chun. Sand Saltation in the South Margin of the Taklimakan Desert—A Case Study in Cele County[J]. JOURNAL OF DESERT RESEARCH, 2012, 32(4): 910-914.

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