| 塔克拉玛干沙漠风沙活动强度特征 |
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| 引用本文： | 俎瑞平,张克存,屈建军.塔克拉玛干沙漠风沙活动强度特征[J].地理研究,2005,24(5):699-707. |
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| 作者姓名： | 俎瑞平 张克存 屈建军 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所,沙漠与沙漠化重点实验室,兰州,730000 |
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| 基金项目： | 国家重点基础研究发展规划项目(G2000048705)，所创新项目(2004105，2003110)资助 |
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| 摘 要： | 通过风资料的统计和计算,对塔克拉玛干沙漠风沙活动强度特征进行了系统研究。结果表明,塔克拉玛干沙漠年平均风速较小,在沙漠内部年平均风速与温度变化呈现“风热同步”现象;有效起沙风作用时间存在明显区域差异,随着风速等级的增加,其出现的频率相应减少,基本上都集中在6.1～10.0m/s之间;输沙势和最大可能输沙量,除若羌地区外,整个沙漠属于低风能环境,且存在很大区域差异,对输沙贡献最大的风速以9.0～11.0m/s为主。
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| 关 键 词： | 平均风速 起沙风速 输沙强度 塔克拉玛干沙漠 |
| 文章编号： | 1000-0585（2005）05-0699-09 |
| 收稿时间： | 2004-10-12 |
| 修稿时间： | 2005-03-27 |
The intensity of sand-drift activities in Taklimakan Desert |
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| ZU Rui-ping,ZHANG Ke-cun,QU Jian-jun.The intensity of sand-drift activities in Taklimakan Desert[J].Geographical Research,2005,24(5):699-707. |
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| Authors: | ZU Rui-ping ZHANG Ke-cun QU Jian-jun |
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| Institution: | Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China |
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| Abstract: | The intensity of sand-drift activities is the important theoretic base for both studying the formation and evolution of aeolian geomorphology and carrying out the sand-damage control measures. Based on statistics and calculations of wind data, this paper studied the intensities of the sand-drift of Taklimakan Desert and drawn some preliminary conclusio ns as follows: ① Except Ruoqiang district, the whole Taklimakan Desert belongs to low-energy environment and the drift potential in most areas is less than 20 0VU. ② With the increase of wind velocity, its frequency decreases gradually, so the most effective sand-moving winds range from 6.1m/s to 10.0m/s, but the most contributors to sand flux concentrate between 9.0 m/s and 11.0 m/s. ③ The intensity of sand-drift activities has great temporal and spatial variation s. As seasons concerned, the sand-drift activity is the strongest during spring and summer and is the weakest in winter, and the autumnlies between them. Ho wever, in the interior of the desert there is a phenomenon called as "wind-temp erature synchronization", that is, the monthly mean temperature and wind velocity get their maximum values during June and July. On the fringe of the desert, the maximum temperature occurs in June and July, while the maximum wind velocity in April and May. According to the calculated results of drift potential and sandflux, the intensity of sand-drift activities is stronger in the central and eastern parts than that of western, southern and southwestern parts. Although this study has got some results, there is still some important work to carry out in future. At first, to give a rational explanation of the temporal and spatial variations of the intensity of sand-drift activities, in combination with the circulation patterns at different elevations. Secondly, to give a det ailed explanation of the "wind-temperature synchronization" phenomenon through scientific experiments. And finally, to integrate the intensity of sand-drift activities with the degree of sand dune activities, so as to provide more effect ive base for sand-damage control measures. |
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| Keywords: | mean wind velocity effective s and-moving winds drift potential sand-transportation intensity Taklimakan Desert |
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