Sand-driving Wind Regime and Sand Drift Potential in the Yardang Landform Areas of Southern Suoyang Town,Guazhou,Gansu,China

doi:10.7522/j.issn.1000-694X.2018.00079

Journal of Desert Research ›› 2019, Vol. 39 ›› Issue (3): 48-55.DOI: 10.7522/j.issn.1000-694X.2018.00079

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Sand-driving Wind Regime and Sand Drift Potential in the Yardang Landform Areas of Southern Suoyang Town,Guazhou,Gansu,China

Liang Xiaolei^1,2, Niu Qinghe¹, An Zhishan¹, Qu Jianjun¹, Shao Yaping³, Wang Liang³

1. Dunhuang Gobi and Desert Research Station/Gansu Center for Sand Hazard Reduction and Engineering and Technology/Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Administration of An'xi Extra-arid Desert National Nature Reserve in Gansu Province, Guazhou 736100, Gansu, China

Received:2018-06-11 Revised:2018-08-13 Published:2019-06-10

Abstract

Abstract: Based on the meteorological observation data from 2016 to 2017 and the geomorphic feature of the research area, we analyzed the sand-driving wind regime and sand drift potential in the yardang landform areas in the south of Suoyang. The results indicated that: Sand-driving wind in the research area was composed of two groups of wind that close to the opposite directions. There was a higher accumulated frequency with 68.86% in the NE-E direction, and 27.67% in the WSW-WNW. The frequency of annual sand-driving wind was 19.0%, and the sand-driving wind occurred mainly in the spring and summer, with an occurring frequency of 33.57% and 34.69%, respectively. The direction structure of seasonal sand-driving wind was similar. Fry berger equation was applied to calculate annual and seasonal sand drift potential, and to analyze its seasonal variation. As a whole, the wind regime in the study area was high wind environment, medium variability and blunt bimodal wind condition. Obvious seasonal differences were reflected in the sand drift potential and directional variability, and there was higher resultant sand drift potential (RDP) and drift potential (DP) in spring and summer and higher RDP/DP in summer and winter. The resultant drift direction (RDD) was in the range of 245.45°-253.01° (WSW), which was consistent with the directions of yardang main ridge line. Therefore, aeolian power was the main driving force for the formation of yardang landform. In addition, this paper provided a theoretical reference for elucidating the formation and development process of yardang landform by combining with the features of field landform.

Key words: Suoyang county, the yardang landform, sand-driving wind, wind regime, sand drift potential

CLC Number:

P931.3

Liang Xiaolei, Niu Qinghe, An Zhishan, Qu Jianjun, Shao Yaping, Wang Liang. Sand-driving Wind Regime and Sand Drift Potential in the Yardang Landform Areas of Southern Suoyang Town,Guazhou,Gansu,China[J]. Journal of Desert Research, 2019, 39(3): 48-55.

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Sand-driving Wind Regime and Sand Drift Potential in the Yardang Landform Areas of Southern Suoyang Town,Guazhou,Gansu,China

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