Sciences in Cold and Arid Regions ›› 2018, Vol. 10 ›› Issue (5): 413–420.doi: 10.3724/SP.J.1226.2018.00413

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  • 收稿日期:2018-02-17 接受日期:2018-06-28 出版日期:2018-11-19 发布日期:2018-11-21
  • 基金资助:
    This study is supported by project funding from Chongqing Normal University (No. 12XLB009) and Key Projects in the National Science & Technology Program (No. 2006BAD26B0302).

Comparison of two classification methods to identify grain size fractions of aeolian sediment

YanZai Wang1,2,3,*(),YongQiu Wu2,3,MeiHui Pan2,4,RuiJie Lu2,3   

  1. 1 College of Geography and Tourism, Chongqing Normal University, Chongqing 401331, China
    2 State Key Laboratory of Earth Surface Process and Resource Ecology, Beijing Normal University, Beijing 100875, China
    3 Engineering Center of Desertification and Blown-Sand Control, Ministry of Education, Beijing Normal University, Beijing 100875, China
    4 College of Geography and Environment Science, Northwest Normal University, Lanzhou, Gansu 730070, China
  • Received:2018-02-17 Accepted:2018-06-28 Online:2018-11-19 Published:2018-11-21
  • Contact: YanZai Wang E-mail:wyz2003qu@163.com
  • Supported by:
    This study is supported by project funding from Chongqing Normal University (No. 12XLB009) and Key Projects in the National Science & Technology Program (No. 2006BAD26B0302).

Abstract:

Grain-size class-Std (GSCStd) and Grain-size class-dD (GSCdD) methods are simple statistical approaches for classifying bulk grain-size distributions (GSDs) into grain-size fractions. Although these two methods were developed based on similar statistical principles, the classification difference between these two methods has not been analyzed. In this study, GSCStd and GSCdD methods are conducted in thirteen grain-size data sequences to examine the applicability for identifying grain size fractions. Results show that, application of the GSCStd method is equivalent to that of the GSCdD method in identifying finer grain-size fractions, and the difference between the two methods mainly comes from the identification of coarse grain-size fractions. Thus, finer grain-size fractions are recommended for use in research of surface aeolian and paleo-aeolian sediments. In addition, our results do not completely agree with previous studies, coarser grain-size fractions in our case suggest that the GSCdD method may not be more applicable than the GSCStd method.

Key words: Grain-size class-Std method, Grain-size class-dD method, grain-size fractions

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PO/PI uf-GSCStd uf-GSCdD uc-GSCStd uc-GSCdD us-GSCStd us-GSCdD
TK-K134 0.57 0.57 1.44 1.44 0.70 0.70
TK-K286 0.44 0.44 3.67 3.67 0.57 0.63
TK-K290 0.51 0.51 2.12 2.12 0.63 0.63
TK-K299 0.51 0.51 1.85 2.60 0.62 0.62
TK-K352-1 0.67 0.63 2.85 2.85 0.71 0.71
TK-K352-2 0.67 0.58 1.55 1.39 0.77 0.77
TK-K352-3 0.56 0.56 1.54 1.35 0.68 0.62
TK-K352-4 0.55 0.55 1.25 2.05 0.60 0.60
TK-K352-5 0.72 0.72 1.70 1.26 0.77 0.75
TK-K534 0.68 0.68 11.71 10.51 0.84 0.84

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Pp/Ps uf-GSCStd uf-GSCdD uc-GSCStd uc-GSCdD us-GSCStd us-GSCdD
XL 1.73 1.70 0.44 0.49 1.51 1.55
JJ 2.44 2.44 0.46 0.51 2.08 1.89
SDG 2.05 2.05 0.25 0.31 1.91 1.87
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