Journal ArticleDOI
The influence of rainfall on transport of beach sand by wind
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In this article, the effect of rainfall on the process of wind erosion of beach sands and presents results from both field and wind tunnel experiments, showing that rain significantly increased threshold wind velocities for the initiation of sediment transport and modified vertical sediment profiles.Abstract:
This paper deals with the effect of rainfall on the process of wind erosion of beach sands and presents results from both field and wind tunnel experiments. Although sediment transport by splash is of secondary importance on coastal dunes, splash-saltation processes can move sediments in conditions where no motion is predicted by aeolian processes. The effect of raindrop impact on the movement of soil particles by wind was measured on a sand beach plain using an acoustic sediment sampler. In general, an increase of particle movement by wind at the sensor heights was observed during rainfall. Rainfall also affected the wind erosion process during and after rain by changing the cohesive conditions of the surface. The influence of the surface moisture content on the initiation of wind erosion and on the vertical distribution of transported sand particles was studied in a wind tunnel. Moisture significantly increased threshold wind velocities for the initiation of sediment transport and modified vertical sediment profiles.read more
Citations
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A review of wind-driven rain research in building science
Bje Bert Blocken,Jan Carmeliet +1 more
TL;DR: The state-of-the-art of wind-driven rain (WDR) research in building science can be classified into three categories: experimental methods, semi-empirical methods and numerical methods.
Journal ArticleDOI
Effects of temperature and humidity upon the transport of sedimentary particles by wind
TL;DR: In this paper, the aerodynamic drag required to entrain sand-sized particles can be 30% lower in cold or high latitude settings, as compared to hot deserts, and the effect of low temperature (T) and specific humidity (q) upon particle entrainment has not previously been investigated.
Journal ArticleDOI
Flow dynamics over a foredune at Prince Edward Island, Canada
TL;DR: In this article, the authors measured time-averaged windspeed profiles at eight locations over a relatively high (8 m), vegetated, topographically simple foredune using cup and ultrasonic anemometry during an onshore wind event in May 2002.
Journal ArticleDOI
The effect of surface moisture on the entrainment of dune sand by wind: an evaluation of selected models
Wim Cornelis,Donald Gabriëls +1 more
TL;DR: In this paper, the authors evaluated several widely used models that predict the threshold shear velocity for particle detachment of wet soils by wind were critically reviewed and evaluated and found that large differences between the predicted results became apparent.
Journal ArticleDOI
Aeolian processes across transverse dunes. II: Modelling the sediment transport and profile development
TL;DR: The simulations with the partly vegetated surfaces reveal that the resulting dune morphology strongly depends on the value of the adaptation length parameter and on the vegetation height, which implies that the dynamical interaction between aeolian activity and vegetation (reaction to burial, growth rates) is highly relevant in dune geomorphology and deserves much attention in future studies.
References
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Journal ArticleDOI
A theoretical and wind tunnel investigation of the effect of capillary water on the entrainment of sediment by wind
TL;DR: In this paper, a theoretical model of the effect of small amounts of water on the threshold shear velocity of sand grains has been tested in wind-tunnel studies, based upon the capillary forces developed at interparticle contacts surrounded by isolated wedges of water.
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Sand movement by wind
TL;DR: In this article, the influence of moisture content on sand movement in wind tunnels has been investigated and the experimental date clearly demonstrates that as the sand moisture content increases, the value of the threshold shear velocity of sand movement may also materially increase.
Journal ArticleDOI
Measurements of sand transport by wind on a natural beach
J. N. Svasek,J. H. J. Terwindt +1 more
TL;DR: The measured critical shear velocity U*c at the beginning of sand movement on a clean dry beach agrees very well with that predicted by Bagnold's formula as mentioned in this paper, provided the shear stress velocity U * > 0·D4 m/s.