The effect of a change of wind direction on the orientation (and some other morphometric characteristics) or aeolian dust ripples is investigated. Ripple formation is simulated in a wind tunnel on surfaces that are already characterized
by a previously established rippling. The effect of a wind rotation 45 degrees, 90 degrees, and 180 degrees is examined.
The sedimentation of loess in a 40 km2 area on the northern border of the Belgian loess belt, is investigated by means of wind tunnel experiments. Loess deposition is simulated on a relief scale model for different wind directions. Simulation
with northeast winds produces a loess deposition pattern that coincides closely to the field pattern, which may be an indication that the loess-bearing winds at the end of the Weichselian came from the northeast. Loess deposition occurs preferably on windward
slopes and not on leward ones. The wind-shadow concept, which is important in the case of sand deposition may not apply to fine materials such silt and clay.
The aim of this study is to investigate the physical effects of rock fragment eccentricity on the dust deposition mechanism. This was examined in a wind tunnel. All data in this study refer to intial dust deposition (not accumulation), since only
wind velocities below the dust deflation threshold were tested.
This article presents a simple physical concept of aeolian dust accumulation, based on the behaviour of the subprocesses of dust deposition and dust erosion. A model is tested in a series of wind tunnel experiments. Some implications of the model
distribution of the sediment. This paper presents wind tunnel results for 5 dust deposition samplers and 5 wind velocities. The catcher's effect on the grain size was apparent in all experiences.
The model is tested in a sedimentation experiment with a symmetrical hill (with length axis perpendicular to the flow direction) in a wind tunnel. It appears both from the model and the experiment that loess deposition will occur preferably
on windward slopes and not on loward ones, in contrast to the widespread wind shadow concept.
Dry aeolian dust accumulation in rocky deserts : a medium-term field experiments based on short-term wind tunnel simulations
The A. explore the possibilities of using short-term wind tunnel simulations for the prediction of medium-term dust accumulation. The pattern of aeolian dust deposition and aeolian dust erosion created on a topographic scale model of a hilly desert
Aeolian dust ; Aeolian features ; Belgium ; Experimentation ; Grain size distribution ; Pebbles ; Spatial distribution ; Wind speed
This study investigates how the deposition of dust is affected when rock fragments become gradually more embedded in the ground or, inversely, become more concentrated on the surface. Experiments were executed in an aeolian dust wind tunnel with 8
Wind tunnel experiments were conducted to investigate the effects of topography on the grain size characteristics of aeolian dust deposits. Experiments were performed on 3 isolated hills having various size and aspect ratios. The longitudinal
profile of the median grain diameter was investigated for each hill. The wind tunnel experiments show that the grain size characteristics of aeolian dust deposits are affected by topography.
In this paper, the main morphometric and dynamic properties of aeolian ripples formed in a wind tunnel during the deposition of natural, silt-sized dust particles over a flat horizontal surface are investigated. Two different (but counteracting