Grain Size Characteristics of the Blowout and Its Environmental Significance in the Hulun Buir Sandy Land, China

doi:10.7522/j.issn.1000-694X.2018.00006

Journal of Desert Research ›› 2018, Vol. 38 ›› Issue (4): 724-733.DOI: 10.7522/j.issn.1000-694X.2018.00006

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Grain Size Characteristics of the Blowout and Its Environmental Significance in the Hulun Buir Sandy Land, China

Zhou Yanguang¹, Chen Huizhong², Guan Chao¹, Li Hongyue¹, Qi Xingfen¹, Hasi Eerdun¹

1. School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China;
2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2017-12-22 Revised:2018-01-27 Online:2018-07-20 Published:2018-11-06

Abstract

Abstract: Using the grain size data of the surface sediment of two blowouts and three vertical profiles of the dunes behind the blowouts in the HulunBuir Sandy Land, we discussed the development process of dune profile behind the blowout and the reasons of the aeolian sand grain size variations in the sedimentary profiles. The results show that the grain size of the surface sediments of the blowouts and each layer of the sedimentary profiles is dominant by fine sand and medium sand; the sediment average grain size on the surface of the blowouts present fluctuant variation at different location of the blowouts; and the modern soil on the flat grassland and the bottom soil of the sedimentary profile of the dune behind the blowout are the same layer. From the comprehensive analysis of the grain size and the dune movement process, this paper argues that the variation of grain size parameters of the aeolian sand of the profiles is mainly due to the variation of profile's relative position caused by the moving and depositing process of the sand dune behind the blowout; and the variation of granularity characteristics of the aeolian sand of the profile obtained from the 2 cm intervals sampling whether cloud directly reflect the evolution of the regional climate environment is a debatable issue.

Key words: Hulun Buir Sandy Land, grain size characteristic, aeolian sand, sediment

CLC Number:

P931.3

Zhou Yanguang, Chen Huizhong, Guan Chao, Li Hongyue, Qi Xingfen, Hasi Eerdun. Grain Size Characteristics of the Blowout and Its Environmental Significance in the Hulun Buir Sandy Land, China[J]. Journal of Desert Research, 2018, 38(4): 724-733.

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Grain Size Characteristics of the Blowout and Its Environmental Significance in the Hulun Buir Sandy Land, China

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