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Quantitative analysis on the dynamic characteristics of megadunes around the Crescent Moon Spring, China

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Abstract

The Crescent Moon Spring is a precious natural heritage. However, the dynamic characteristics of megadunes around the Crescent Moon Spring are not well known. This paper quantitatively studied the characteristics and changes of megadunes around the Crescent Moon Spring by interpreting aerial photographs taken in 1985 and 2004 and analysing the dune crestlines and the wind data collected from 2011 to 2012. Results revealed that pyramid dunes were formed by a complex wind regime. The Crescent Moon Spring was not buried by shifting sands because of the stable wind regime and relative stability of pyramid dunes. The crestlines of the dunes around the spring moved northward between 1985 and 2004. The south-facing slip faces were also exposed to wind erosion, whereas the other faces were under deposition, thus indicating that the southerly wind was relatively enhanced. Limiting the scale of tall windbreaks and architectures in the Dunhuang oasis at the north of the spring was necessary to maintain the dynamic equilibrium of the wind regime and sand transport.

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Authors and Affiliations

  1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China

    YingJun Pang, JianJun Qu, KeCun Zhang, ZhiShan An & QingHe Niu

  2. Dunhuang Gobi and Desert Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Dunhuang, 736200, China

    YingJun Pang, JianJun Qu, KeCun Zhang, ZhiShan An & QingHe Niu

  3. Gansu Center for Sand Hazard Reduction Engineering and Technology, Lanzhou, 730000, China

    JianJun Qu, KeCun Zhang, ZhiShan An & QingHe Niu

Authors
  1. YingJun Pang
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  2. JianJun Qu
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  3. KeCun Zhang
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  4. ZhiShan An
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  5. QingHe Niu
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Correspondence to JianJun Qu.

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Pang, Y., Qu, J., Zhang, K. et al. Quantitative analysis on the dynamic characteristics of megadunes around the Crescent Moon Spring, China. J. Arid Land 6, 255–263 (2014). https://doi.org/10.1007/s40333-013-0245-0

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  • DOI: https://doi.org/10.1007/s40333-013-0245-0

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