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Enhanced assessment of regional impacts from wind erosion by integrating particle size

文献类型： 外文期刊

作者： Xu, Hui 1 ; Wang, Yu 1 ; Han, Tian 1 ; Li, Ruonan 1 ; Ma, Jinfeng 1 ; Qiu, Xiao 4 ; Ying, Lingxiao 1 ; Zheng, Hua 1 ;

作者机构： 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China

2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

3.China Univ Min & Technol, Coll Geosci & Surveying Engn, Beijing 100083, Peoples R China

4.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot 010031, Peoples R China

关键词： Regional impact assessment; Soil loss; Sand and dust; Soil particle transportation; Particle size

期刊名称：CATENA （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0341-8162

年卷期： 2024 年 239 卷

页码：

收录情况： SCI

摘要： Wind erosion is a key factor contributing to desertification and soil degradation in arid and semiarid regions. After detached from the soil surface, the transportation of wind-blown particles and its impact area are determined not only by meteorological conditions but also by the size of particles. However, models commonly used for assessing the regional impact of wind erosion rarely consider particle size differences, resulting in reduced assessment accuracy. This study adopted a sand dust event of the Mu Us Sandy Land in the southern part of the Inner Mongolian Plateau of China as an example. Based on previous studies involving the simulation of dust transport masses and trajectories, this research integrated the transport characteristics of particles with different sizes and proposed a new method for assessing the impact of wind erosion. The results showed that the wind erosion-induced regional impact integrating the particle size accounts for 7.5% of the total wind erosion impact. Compared to the method without integrating the particle size, the application of the method integrating the particle size reduced the error in modelling particle masses far from the dust source and increased the simulation accuracy for the spatial distribution of dust by 14.29%. The study emphasizes the critical role of the particle size in wind-blown particle transport and provides a new approach for accurately evaluating the regional impact of wind erosion.

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