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JOURNAL OF DESERT RESEARCH ›› 2017, Vol. 37 ›› Issue (4): 621-625.DOI: 10.7522/j.issn.1000-694X.2016.00008

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Characteristic of Sand-drift Activities along the Qarhan Salt Lake Section of Qinghai-Tibet Railway

Bao Feng1,2, Dong Zhibao1,3   

  1. 1. College of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, China;
    2. College of Biological and Environmental Engineering, Xi'an University, Xi'an 710065, China;
    3. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2015-12-18 Revised:2016-01-13 Online:2017-07-20 Published:2017-07-20

Abstract: The research on the characteristics of sand-drift activities along the Qarhan Salt Lake section of Qinghai-Tibet Railway can explore the mechanism of blown sand disaster formation along the railway and provide data for an effective prevention system.We conducted fieldwork to examine the topographic features,and collected sediment samples and wind data.The results are as follow:(1) The annual average wind speed is 3.7 m·s-1 with peak value in spring.The direction of sand-driving wind is mainly WNW.The area belongs to an intermediate wind energy environment.The wind direction variability (RDP/DP) belongs to low ratio and single peak wind regimes.The Resultant Drift Direction (RDD) is 298.14 and intersects vertically with the railway line.The stable wind direction and the intersection of wind to the railway line are dynamic factors contributing to the blown sand disaster.(2) The sediment is mainly composed of middle and fine particles.The closer from the railway,the larger the particle size is.The particles at 0.063-0.04 mm provide material foundation for the sand disaster along the railway.(3) The sand dune form change indicates that sand-drift activities are intensive,and the prevention system severely degraded.

Key words: Qinghai-Tibet Railway, sand dunes, blown sand disaster, Qaidam Basin

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