Wind erosion is a physical process predominated by airborne grains rather than the wind itself. The soil deformation is either elastic–plastic or fully plastic during its collisions with solid grains, corresponding to dense and loose soils, respectively. Only the fully plastic deformation was previously taken into account in the physically-based wind erosion models. The impact erosion of dry and dense soil surface can be well quantified by the contact mechanics and strength theories. In this study, with the help of Owen's uniform saltation model, a simple expression for wind erosion rate is derived based upon the eroded volume per impact when soil deforms in the elastic–plastic manner. The new expression, a simple analytical function of several conventional variables and parameters of wind and soil, describes the effects of saltation flux and soil susceptibility. Its validity is verified by some field and laboratory experiments.

中文翻译：

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干密土面风蚀率表达式

风蚀是一种物理过程，主要由空气中的颗粒而非风本身主导。在与固体颗粒碰撞期间，土壤变形要么是弹塑性变形，要么是完全塑性变形，分别对应于致密和松散的土壤。以前在基于物理的风蚀模型中只考虑了完全塑性变形。接触力学和强度理论可以很好地量化干密土壤表面的冲击侵蚀。在这项研究中，借助欧文的均匀跳跃模型，当土壤以弹塑性方式变形时，基于每次冲击的侵蚀体积推导了风蚀率的简单表达式。新表达式，几个常规变量和风土参数的简单解析函数，描述了跳跃通量和土壤敏感性的影响。一些现场和实验室实验验证了其有效性。