img

Wechat

Adv search

Journal of Desert Research ›› 2024, Vol. 44 ›› Issue (3): 279-289.DOI: 10.7522/j.issn.1000-694X.2024.00046

Previous Articles    

Characteristics of aeolian sand activity in typical section of protection system of Wuhai-Maqen HighwayG1816in Tengger Desert

Yongtao Gou1(), Yongxiang Wu1, Bo Peng1, Yong Zhang1, Huiping Kong1, Xinghong Zhao1, Pengju Ji1, Yunhao Li1, Mingzhu He2, Mei Shao2, Mingliang Tan2, Junfeng Lu2()   

  1. 1.Ningxia Jiaotou Expressway Management Co. ,Ltd. ,Yinchuan 750001,China
    2.Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
  • Received:2023-12-04 Revised:2024-03-29 Online:2024-05-20 Published:2024-06-11
  • Contact: Junfeng Lu

Abstract:

Aeolian sand activities threaten highway safety operation in Wuhai-Maqen Highway (G1816) in Tengger Desert. The characteristics of wind conditions, grain size and near-surface(0-2 m)horizontal dust flux in typical section of protection system were investigated. The results show that the average annual wind speed is 3.13 m·s-1, the average annual sand driving wind speed is 7.66 m·s-1, the frequency of sand driving wind is 17.6%, and the direction of sand driving wind is mainly W-NNW, E and S. The annual sand drift potential is 187.57 VU, the resultant sand drift potential is 78.6 VU, the direction of resultant sand drift potential is 135°, and the RDP/DP is 0.419, which belongs to the low wind energy environment and blunt bimodal wind condition with moderate wind direction variability. The spatial difference of horizontal sand and dust flux in the protection system is significant, and the horizontal sand and dust flux decreased by 99% from moving dune observation point to straw checkerboard barriers observation point near the road upwind, and it also decreased by 93.6% from moving dune observation point to checkerboard barriers observation point near road downwind. The surface sediment in the protection system is mainly consist of medium sand and fine sand, and the particle size of sand and dust at different heights gradually becomes finer from the outside to the inside of the protection system.

Key words: wind regime, sand drift potential, dust flux, Wuhai-Maqen Highway

CLC Number: