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- W2897212799 abstract "Abstract Aeolian sand transport is a complicated process that is affected by many factors (e.g. wind velocity, sand particle size, surface microtopography). Under different experimental conditions, erosion processes will therefore produce different results. In this study, we conducted a series of wind tunnel experiments across a range of wind velocities capable of entraining sand particles (8.0, 10.0, 12.0, and 14.0 m s ‐1 ) to study the dynamic changes of the shear velocity, aerodynamic roughness length, and sand transport. We found that the shear velocity and aerodynamic roughness length are not constant; rather, they change dynamically over time, and the rules that describe their changes depend on the free‐stream air velocity. For wind tunnel experiments without feeding sand into the airflow, the sand bed elevation decreases with increasing erosion time, and this change significantly affected the values of shear velocity and aerodynamic roughness length. A Gaussian distribution function described the relationships between the sand transport rate ( q T ) and the duration of wind erosion ( T ). It is therefore necessary for modelers to consider both deflation of the bed and the time scale used when calculating sand transport or erosion rates. © 2018 John Wiley & Sons, Ltd." @default.
- W2897212799 created "2018-10-26" @default.
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- W2897212799 date "2018-11-29" @default.
- W2897212799 modified "2023-10-14" @default.
- W2897212799 title "Wind tunnel tests of the dynamic processes that control wind erosion of a sand bed" @default.
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- W2897212799 doi "https://doi.org/10.1002/esp.4534" @default.
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