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[1]WANG Jinguo,AN Zhishan,ZHANG Kecun,et al.Surface Sand Grain Characteristics Along Zhongwei Section of Wuhai-Maqin Highway[J].Research of Soil and Water Conservation,2021,28(06):183-189.

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Surface Sand Grain Characteristics Along Zhongwei Section of Wuhai-Maqin Highway

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 06 Page number: 183-189 Column: Public date: 2021-10-10

Title:: Surface Sand Grain Characteristics Along Zhongwei Section of Wuhai-Maqin Highway

Author(s):: WANG Jinguo¹，AN Zhishan^2,3，ZHANG Kecun²，QU Jianjun²，HE Mingzhu²; (1.Ningxia Investment Engineering Construction Management Company，Yinchuan 750000，China; 2.Dunhuang Gobi and Desert Research Station，Key Laboratory of Desert and Desertification，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China; 3.University of Chinese Academy of Sciences，Beijing 100049，China)

Keywords:: Wuhai-Maqin Highway; drift potential; particle size characteristics; sand flow structure

CLC:: P425.5⁺5

DOI:: -

Abstract:: As an important north-south traffic channel in the Ningxia Autonomous Region，the Wuhai-Maqin highway is of great significance for driving economic development in the autonomous region and transportation pressure in the environmental region. Through field investigation and sampling，combining with indoor analysis experiments，the distribution characteristics of surface sand particles along the Tengger Desert section of Wuhai-Maqin highway were studied. The results show that:(1)the frequency of wind speed of 0～5 m/s level in the area accounted for 90.45% of the annual wind speed; the winds of sand blowing mainly concentrated in the northwest，east and south directions，the direction of sand transport was combined，and the synthetic transport potential was in the southeast direction; the area where the transport potential was less than 200 VU belonged to a low wind energy environment;(2)from northeast to southwest，the particle size range of all samples concentrated in 1.0～2.76 Φ，and mainly belonged to fine sand and medium sand; except for the No.5 plot，the cumulative frequency distribution curves of the sediments at the depths of 20 cm，50 cm and 100 cm were bimodal，and the rest of the samples were all unimodal，indicating that the sediments had been fully sorted，and sedimentary environment was dominated by the early two groups of dominant wind directions;(3)with the increase of depth，the change of percentage content in different particle size ranges was not very obvious，and the sorting performance was good or very good，the skewness was positive or extremely positive;(4)the sand flow in the area mainly concentrated below 30 cm，accounting for 89.46% of the total sediment transport，and the sediment transport within the height of 0～20 cm on the surface accounted for 63.81% of the total sediment transport. The direction of the Wuhai-Maqin Highway protection system should be northeast-southwest which is perpendicular to the direction of the regional synthetic sand transport. It is suggested that the height of the sand fixation measures should not be less than 20 cm.

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Last Update: 2021-10-10