Arid Zone Research ›› 2019, Vol. 36 ›› Issue (1): 262-268.doi: 10.13866/j.azr.2019.01.30

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Wind Erosion on Different Solonchaks in Dried Lake Bed

HAN Xu-jiao1,2,3, ZHANG Guo-ming1,2,3, LEI Jie1,2, LIU Lian-you1,2,3, DAI Jia-dong1,2,3, YANG Yan-yan1,2,3   

  1. 1. Key Laboratory of Environmental Change and Natural Disaster,MOE,Beijing Normal University,Beijing 100875,China;
    2. Academy of Disaster Reduction and Emergency Management,Beijing Normal University,Beijing 100875,China;
    3. Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China
  • Received:2018-05-16 Revised:2018-07-12 Published:2025-10-17

Abstract: In this study,the soil samples of the typical solonchaks including meadow solonchak,puffy solonchak and crustal solonchak as well as the topsoil and undisturbed soil were collected from the dried lake beds in northeast Inner Mongolia.Through wind tunnel experiments,the wind erosion rates of different solonchak samples were revealed.The compared results of wind tunnel experiments revealed that the pure airflow rates were in an order of meadow solonchak (12 m·s-1) > puffy solonchak (9 m·s-1) > crustal solonchak (8 m·s-1).The wind erosion rates were in an order of puffy solonchak (14.44 g·m-2·min-1) > meadow solonchak (1.00 g·m-2·min-1) > crustal solonchak (0.42 g·m-2·min-1).With the increase of wind velocity,the difference of wind erosion rates of different solonchaks became more significant.The wind velocity higher than 15 m·s-1 was the main driving force for wind erosion in the dried lake beds.During the process of wind erosion,the sediments were mainly distributed within the height 0-10 cm from the ground.In the initial movement,the movement of eroded materials from saline soil was dominated by rolling and close-range saltation.Results showed that the sediment flux was increased with the increase of wind velocity.With the increase of wind speed,more and more dust particles subjected to a stronger impact and formed finer dust particles to release into the air.Therefore,the salt land surface in arid area was an important source of material to form a regional saline dust or salt dust weather.The transport flux of soil samples was ranked in an order of puffy solonchak (3.17 g) > crustal solonchak (0.42 g) > meadow solonchak (0.35 g).

Key words: dried lake bed, solonchak, wind erosion rate, wind tunnel experiment, Inner Mongolia