The Yardangs at Loulan area are in an active development period. This is beneficial for the study of their erosion characteristics. Based on the field investigation and measurement of the geomorphologic shape, and the laboratory experiment, the results are shown as follows. The stratum of the Yardang landforms at Loulan area is formed during Holocene, which are comprised of solid clayey-silt layers (CS) and unconsolidated sand-silt layers (SS) alternately. The landform has suffered different erosion rates, which corresponds to the different stratums. The solid CS layers have left more residual because of more anti-wind erosion, and collapsed at last. The length (L) and thickness (T) of the collapsed blocks delegated the erosion depth of SS layers and the thickness of CS layers respectively. The statistics reveal that L and T of the collapsed blocks have moderate positive correlation (R=0.553). But the L lengthens slowed down as the T increases (the ratios of L/T decreases) until to L/T≈1. Comprehensive analysis indicates that the development of the Yardang landforms is mainly controlled by the wind. But the lithology and gravity also play important roles.
Lin Yongchong
,
Mu Guijin
,
Qin Xiaoguang
,
Zhao Xue
,
Xu Bing
,
Jia Hongjuan
,
Zhang Lei
,
Ruan Qiurong
,
Wu Yong
,
Wei Dong
,
Wang Chunxue
,
Shao Huiqiu
. Erosion Characteristics of Yardangs at Loulan Area, Xinjiang, China[J]. Journal of Desert Research, 2017
, 37(1)
: 33
-39
.
DOI: 10.7522/j.issn.1000-694X.2015.00214
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