Aeolian creep transport: A review

Zhang, Pei; Sherman, Douglas J.; Li, Bailiang

doi:10.1016/j.aeolia.2021.100711

Cited by 24 publications

(10 citation statements)

References 183 publications

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“…For these three kinds of particles, F s are quite small, and their mean value is between 1.0% and 1.7%. The sand particles on the ground (at the height z = 0) are defined as creeping particles, which are very tricky to measure by the sand sampler [54]. Given this, further quantitative analysis on the creep percentage is not performed in this study.…”

Section: Movement Form Of Sand Particles In the Windblown Sand Flow Fieldmentioning

confidence: 99%

Wind Tunnel Test on Windblown Sand Two-Phase Flow Characteristics in Arid Desert Regions

Huang

Zhang

et al. 2021

Applied Sciences

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Windblown sand two-phase flow characteristics become an essential factor in evaluating the windblown sand load on infrastructures and civil structures. Based on the measured wind characteristics in arid desert regions, windblown sand flow fields with three kinds of sand beds are simulated in the wind tunnel, respectively. The results indicate that the characteristic saltation height of sand particles increases with the wind speed and particle size in the windblown sand flow field. As the sand concentration increases, the wind speed decreases, and the turbulence intensity increases. The concentration, energy, and impact pressure of sand particles increase with increasing wind speed and decrease exponentially with increasing height. At the same wind speed, the concentration, energy, and impact pressure of the coarse sand, fine sand, and mixed sand increases, in turn. Moreover, the variation of kinetic energy with height is similar to that of total energy with height and the proportion of potential energy to total energy is quite small.

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Section: Movement Form Of Sand Particles In the Windblown Sand Flow Fieldmentioning

confidence: 99%

Wind Tunnel Test on Windblown Sand Two-Phase Flow Characteristics in Arid Desert Regions

Huang

Zhang

et al. 2021

Applied Sciences

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“…However, other studies have found saltation to be the dominant transport form of wind erosion, with the potential to provide power for creep and suspension (Martin and Kok, 2017;Liu and Bo, 2019). Under natural environments, a gradual transition is observed between the three erodible particles' movement patterns, and each transition mode is related to the surface shear stress and size of the erodible particles (Zhang et al, 2021). In general, the particle size cut-off points for suspension, saltation, and creep wind erosion are approximately 100 and 500 μm (Fattahi et al, 2020).…”

Section: Discussionmentioning

confidence: 96%

Effect of tillage management on the wind erosion of arable soil in the Chinese Mollisol region

Chen

Zhang

et al. 2022

Front. Environ. Sci.

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Wind erosion is a serious problem in agricultural regions and threatens the regional food production in Northeast China. However, limited information is available on the characteristics of wind erosion in arable soil in Northeast China. As a result, field-based research during periods of vulnerability to wind erosion is essential. This study quantified the characteristics of soil wind erosion under no-tillage (NT) and conventional tillage (CT) treatments in China’s northern “corn-belt.” The results determined the wind erosion transport mode of Mollisols to be generally characterized by creep and supplemented by saltation and suspension in Northeast China. The erodible particles of the creep accounted for 80.37% and 85.42% of the total wind erosion under the NT and CT treatments, respectively. During experiments with erodible particles in the saltation mode from the soil surface to 2 m, the majority of the particles were collected by the sampler at 0.5 m height, with the NT and CT treatments collecting 5.82 kg·m−2 and 6.93 kg·m−2 of erodible particles per unit area, respectively. Wind erosion on agricultural land was observed to be influenced by tillage practices, rainfall, wind speed, and soil moisture content. Average and maximum wind speeds exhibited significant positive correlations with wind erosion during April and May. Moreover, the erodible particles of each wind erosion transport mode (creep, saltation, and suspension) under CT were higher (1.73, 1.41, and 1.35 times) than those under the NT treatment. With less damage and greater protection of the surface soil, the NT treatment was able to decrease the occurrence of wind erosion and influence its outcome on farmland. Therefore, NT treatment should be encouraged as a key initiative for the reduction of wind erosion of arable soil in the Chinese Mollisol region.

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“…Grain size affects aeolian sediment transport due to the larger drag and lift force that is necessary to displace coarser grains (Durán et al, 2011;Sarre, 1987). Grain size also alters the creep and saltation trajectory of sediment (e.g., Cheng et al, 2015;Zhang et al, 2021). Therefore, different grain size fractions lead to different rates of sediment transport.…”

Section: Introductionmentioning

confidence: 99%

Modeling multi-fraction coastal aeolian sediment transport with horizontal and vertical grain size variability

IJzendoorn

Hallin

Reniers

et al. 2023

Preprint

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Grain size affects the rates of aeolian sediment transport on beaches. Sediment in coastal environments typically consists of multiple grain size fractions and exhibits spatiotemporal variations. Still, conceptual and numerical aeolian transport models are simplified and often only include a single fraction that is constant over the model domain. It is unclear to what extent this simplification is valid and if the inclusion of multi-fraction transport and spatial grain size variations affects aeolian sediment transport simulations and predictions of coastal dune development. This study applies the numerical aeolian sediment transport model AeoLiS to compare single-fraction to multi-fraction approaches for a range of grain size distributions and spatial grain size scenarios. The results show that on timescales of days to years, single-fraction simulations with the median grain size, D50, often give similar results to multi-fraction simulations provided the wind is able to mobilize all fractions within that time frame. On these timescales, vertical variability in grain size has a limited effect on total transport rates, but it does influence the simulation results on minute timescales. Horizontal grain size variability influences both the total transport rates and the downwind bed grain size composition. The results provide new insights into the influence of beach sediment composition and spatial variability on total transport rates towards the dunes. The findings of this study can guide the implementation of grain size variability in numerical aeolian sediment transport models.

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Aeolian creep transport: A review

Cited by 24 publications

References 183 publications

Wind Tunnel Test on Windblown Sand Two-Phase Flow Characteristics in Arid Desert Regions

Wind Tunnel Test on Windblown Sand Two-Phase Flow Characteristics in Arid Desert Regions

Effect of tillage management on the wind erosion of arable soil in the Chinese Mollisol region

Modeling multi-fraction coastal aeolian sediment transport with horizontal and vertical grain size variability

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