The relationship between wind regime and yardang morphology in the Duck Lake Area of Qaidam Basin， China

doi:10.7522/j.issn.1000-694X.2020.00046

Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (5): 42-48.DOI: 10.7522/j.issn.1000-694X.2020.00046

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The relationship between wind regime and yardang morphology in the Duck Lake Area of Qaidam Basin， China

Zhun Liang¹(), Lü Ping¹(), Zhengyao Liu¹, Nan Xiao¹, Wei Liang², Mingjing Xu¹, Miaoyan Feng¹

^1.School of Geography and Tourism，Shaanxi Normal University，Xi’an 710119，China
^2.School of Computer Science and Engineering，Xi’an University of Technology，Xi’an 710048，China

Received:2020-04-12 Revised:2020-05-11 Online:2020-09-28 Published:2020-09-28
Contact: Lü Ping

Abstract

Abstract:

Yardang landform is widely distributed in the Qaidam Basin， China. There is only semi-submerged yardang landform in the Duck Lake Area which is located in the central region of the Qaidam Basin. In this paper， we analyzed the characteristics of wind speed， wind direction and sand drift potential. Then， we measured the length， width and trend of yardangs which are near the north shore of Duck Lake by Google Earth satellite images. The results showed that：（1） The wind speed and direction are relatively stable， prevailing wind direction is WNW and secondary prevailing wind direction is NW. The sand drift potential is 339.76 VU， belonging to middle wind energy environment. （2） The type of yardangs is diverse. There is a strong positive correlation between length and width （R²=0.91）， the average ratio of length and width is 2.6. （3） The trend of yardangs is 147°， almost paralleling to the prevailing wind direction， slightly differing from the resultant drift direction. Wind plays a dominant role in controlling the shape of yardangs.

Key words: yardang, morphology, wind regime, Duck Lake, Qaidam Basin

CLC Number:

P931.3

Zhun Liang, Lü Ping, Zhengyao Liu, Nan Xiao, Wei Liang, Mingjing Xu, Miaoyan Feng. The relationship between wind regime and yardang morphology in the Duck Lake Area of Qaidam Basin， China[J]. Journal of Desert Research, 2020, 40(5): 42-48.

Figures/Tables 7

Fig.1 The location of the study area（The satellite image is from Google Earth）

Fig.2 Interannual (A) and monthly (B) variation of average wind velocity and maximum wind velocity from 2002 to 2015

Fig.3 Wind frequency rose

Fig.4 Annual drift potential

Fig.5 The proportions of yardangs in different length range (A) and width range (B)

Fig.6 The relationship between the length and width of yardangs

Fig.7 Strike direction of yanrdangs

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The relationship between wind regime and yardang morphology in the Duck Lake Area of Qaidam Basin， China

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